A binder phase of TiO based cermets, a kind of imitated gold materials, was developed by adding active element Si to Fe-Cr alloy, and the related mechanisms were studied. The wettability, matching in thermodynamics an...A binder phase of TiO based cermets, a kind of imitated gold materials, was developed by adding active element Si to Fe-Cr alloy, and the related mechanisms were studied. The wettability, matching in thermodynamics and interracial strength were investigated by the high temperature sessile drop method and element area scanning. The linear expansion coefficients of the materials were measured using TAH100 thermal analyzer. The results show that the wettability of Fe-Cr alloy on TiO are small, with a wetting angle about 90°. After adding some Si in Fe-Cr alloy, its wetting angle can be decreased to about 25°, the interracial reactions can be prevented effectively and high interface binding can be formed. Fe-25% Cr-1.5% Si matches the thermal expansion coefficient of TiO, so it is a kind of relatively perfect binder for TiO based cermets imitated gold.展开更多
The microwave dielectric properties of ZrO2-SnO2-TiO2 (ZST) system ceramics were studied as a function of the amount of Sb2O5 dopant. With the addition of 0-0.5% Sb2O5(molar ratio), the substitution of Ti4^+ ions...The microwave dielectric properties of ZrO2-SnO2-TiO2 (ZST) system ceramics were studied as a function of the amount of Sb2O5 dopant. With the addition of 0-0.5% Sb2O5(molar ratio), the substitution of Ti4^+ ions with Sb^5+ ions decreased the sintering temperature and increased the quality factor Q due to the reduction of oxygen vacancies, When the amount of Sb^5+ increased further (above 0.5%), Q was decreased by increasing the electron concentration. When the system doped with 0.5% Sb2O5 was sintered at 1 150℃ for 6 h, the relative dielectric constant ε, Qf0, and the temperature coefficient of resonant frequency (TCF) were 38.46, 44 500 GHz, 20.0×10^-6/℃, respectively, at 6 GHz,展开更多
Song Dynasty was very significant in Chinese feudal history, and ceramic industry boomed during that time: all kinds of kilns were scattered all over the country, and ceramic art achieved great success. Among those a...Song Dynasty was very significant in Chinese feudal history, and ceramic industry boomed during that time: all kinds of kilns were scattered all over the country, and ceramic art achieved great success. Among those achievements, ceramic censers were a very typical one which features unique styles in patterns, decorations, and glaze colors. This paper covers the developing process and artistic characteristics of censers in Song Dynasty.展开更多
Abstract modern social awareness and people' s aesthetic psychology has undergone tremendous changes in the design of modem ceramic art poses severe requirements. This article from the perspective of modem lifestyles...Abstract modern social awareness and people' s aesthetic psychology has undergone tremendous changes in the design of modem ceramic art poses severe requirements. This article from the perspective of modem lifestyles, made from ceramic design concepts, modeling, implication, decoration, materials and technology and other aspects of transformation and innovation, in order to achieve adapt to the modem lifestyle, aesthetic purposes.展开更多
In this work, the results of a study of laser ablation cleaning process on ceramic artifacts are presented. The experiments were conducted on a "Carosello", a structural hollow element made of clay, placed in arches...In this work, the results of a study of laser ablation cleaning process on ceramic artifacts are presented. The experiments were conducted on a "Carosello", a structural hollow element made of clay, placed in arches, in domes or even in the walls of buildings such as churches and houses. Our results show that laser ablation techniques is able to remove the surface impurity patina from artifacts surface without changes the chemical composition and the optical properties of ceramic. Moreover, because the laser cleaning heats only locally the surface of the sample, this method don't preclude the possibility to apply on artifact the thermo-luminescence dating process.展开更多
This paper describes technology of the electromagnetic pump made in a hybrid polymer-ceramic technology. The pumping mechanism is realized with a mutual excitation between an electromagnetic coil and a neodymium magne...This paper describes technology of the electromagnetic pump made in a hybrid polymer-ceramic technology. The pumping mechanism is realized with a mutual excitation between an electromagnetic coil and a neodymium magnet bonded to a flexible membrane. A PDMS (poly(dimethylsiloxane)) material was used to manufacture a membrane sufficient for the presented micropump. A fish trap construction is adapted to the ceramic technology. The bonding process of ceramics and polymer, using plasma oxidation method, is described as well. Moreover, a membrane deflection depending on magnet dimensions and applied voltage was measured.展开更多
In order to predict the powder flow law of the injection molding process of MgTiO3 ceramic parts with complex structures,a constitutive model and numerical simulation method for MgTiO3 ceramic injection molding were e...In order to predict the powder flow law of the injection molding process of MgTiO3 ceramic parts with complex structures,a constitutive model and numerical simulation method for MgTiO3 ceramic injection molding were established based on the Hunt method.The material parameters of MgTiO3 such as elastic modulus,Poisson ratio,glass transition temperature,thermal conductivity and specific heat capacity were measured.Based on the fitting curve and the material parameters measured,the cross-WLF viscosity model and P-V-T model required for MgTiO3 ceramic injection molding were optimized.Furthermore,the influence of process parameters on mold filling flow and distribution of parts defects was researched.It was found that the gate position,injection speed and melt temperature have greater influence on mold filling flow and the packing process has an obvious effect on parts’defects.On this basis,the MgTiO3 ceramic parts injection molding experiment verification was carried out.By comparing the experimental results with the simulated results,it is found that the deformation error is within 1.5%and the density error is within 1%.Therefore,this research provided theoretical guidance for the engineering application of MgTiO3 ceramic parts fabricated by injection molding.展开更多
Silicon carbide (SiC) ceramic with YAG (Y3Al5O12) additive added by sol-gel method was liquid-phase sintered at different sintering temperatures, and the sintering mechanism and microstructural characteristics of resu...Silicon carbide (SiC) ceramic with YAG (Y3Al5O12) additive added by sol-gel method was liquid-phase sintered at different sintering temperatures, and the sintering mechanism and microstructural characteristics of resulting silicon carbide ceramics were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and elemental distribution of surface (EDS). YAG (yttrium aluminum garnet) phase formed before the sintering and its uniform distribution in the SiC/YAG composite powder decreased the sintering temperature and improved the densification of SiC ceramic. The suitable sintering temperature was 1860 °C with the specimen sintered at this temperature having superior sintering and mechanical properties, smaller crystal size and fewer microstructure defects. Three characteristics of improved toughness of SiC ceramic with YAG added by sol-gel method were microstructural densification, main-crack deflection and crystal ‘bridging’.展开更多
Jingdezhen is a bright star to make ceramic products among all cities of the world. The actual inheritance of the famille rose decoration and color enamel craftsmanship as China's "intangible cultural heritage" is ...Jingdezhen is a bright star to make ceramic products among all cities of the world. The actual inheritance of the famille rose decoration and color enamel craftsmanship as China's "intangible cultural heritage" is restricted not only by historical change and geographical conditions and also by how to inherit the craftsmanship. In this paper, through the literature studies, sociology investigation, market research, and comparative analysis of the traditional pastel industry in Jingdezhen, the making flows of famille rose decoration and color enamel are introduced plus the author's understanding of famille rose decoration and color enamel, and also the understanding and inheritance of Jingdezhen traditional famille rose decoration and color enamel craftsmanship as "intangible cultural heritage" are discussed. Therefore, theoretical basis and practice guidance are provided for famille rose decoration and color enamel craftsmanship to develop toward the cultural industry, and also a reference in theory and practice is available for the inheritance and development of the handmade ceramic products as "intangible cultural heritage".展开更多
The word "tile" originates from Persian and means "China" or "Chinese work". In the Ottoman language, the word "tile" also means "Chinese work", or "belonging to China". The art of Turkish tiles occupies a...The word "tile" originates from Persian and means "China" or "Chinese work". In the Ottoman language, the word "tile" also means "Chinese work", or "belonging to China". The art of Turkish tiles occupies a place of prominence in the history of Islamic art. Its roots can be traced at least as far back as the Uygurs of the eighth and ninth centuries. Its subsequent development was influenced by the Karakhanids, the Ghaznavids, and (especially) Iranian Seljuk art. With the Seljuks' victory over the Byzantines at Malazgirt in 1071, the art followed them into Anatolia and embarked upon a new period of strong development fostered by the Anatolian Seljuk sultanate. The first major development in the art of tile-making occurred primarily in Anatolian Seljuk architecture. Various techniques have been used in the art of tiles which gave hundreds of samples for centuries. This study explores the glazed tile techniques used in the production of the S elj uk and Beylik periods.展开更多
Glass-ceramics obtained from the electric arc furnace molten slag of incinerator fly ash was produced by applying nucleation and crystallization through heat treatment process. The effects of nucleating agent (TiO2 a...Glass-ceramics obtained from the electric arc furnace molten slag of incinerator fly ash was produced by applying nucleation and crystallization through heat treatment process. The effects of nucleating agent (TiO2 and Cr2O3) on the crystallization kinetics and heat treatment schedule of the slag were investigated. The results show that the nucleating agents changed the crystallization phase and morphology of the obtained glass-ceramics. The optimum heat treatment schedule of the glass with TiO2 was determined as nucleation at 952 K for 1.5 h and crystal growth at 1 258 K for 1.5 h, while those values with Cr203 were estimated at 971 K for 2 h and at 1 238 K for 2 h. TiO2 acting as nucleating agent could decrease the activation energy of the slag and shorten the total thermal treatment time in comparison with Cr2O3. The glass-ceramics obtained under the optimum heat treatment condition was environmentfriendly and had remarkable physical/mechanical properties and chemical durability.展开更多
Membrane filtration technology combined with coagulation is widely used to purify river water.In this study,microfiltration(MF)and ultrafiltration(UF)ceramic membranes were combined with coagulation to treat local riv...Membrane filtration technology combined with coagulation is widely used to purify river water.In this study,microfiltration(MF)and ultrafiltration(UF)ceramic membranes were combined with coagulation to treat local river water located at Xinghua,Jiangsu province,China.The operation parameters,fouling mechanism and pilot-scale tests were investigated.The results show that the pore size of membrane has small effect on the pseudo-steady flux for dead-end filtration,and the increase of flux in MF process is more than that in UF process for cross-flow filtration with the same increase of cross-flow velocity.The membrane pore size has little influence on the water quality.The analysis on membrane fouling mechanism shows that the cake filtration has significant influence on the pseudo-steady flux and water quality for the membrane with pore size of 50,200 and 500 nm.For the membrane with pore size of 200 nm and backwashing employed in our pilot study,a constant flux of 150L·m 2·h 1was reached during stable operation,with the removal efficiency of turbidity,total organic carbon(TOC)and UV254 higher than 99%,45%and 48%,respectively.The study demonstrates that coagulation-porous ceramic membrane hybrid process is a reliable method for river water purification.展开更多
In this experimental study, chromium oxide powder was sprayed on a low-carbon steel substrate using the atmospheric plasma spray process. The current and standoff distances(SODs) were varied to study their effect on t...In this experimental study, chromium oxide powder was sprayed on a low-carbon steel substrate using the atmospheric plasma spray process. The current and standoff distances(SODs) were varied to study their effect on the fracture toughness of the coatings. Theoretically, as the arc current increases, the melting of the ceramic oxide should increase and this in turn should lead to the formation of a dense coating. However,it was observed that if the arc power is too high and because the particle size of the powder is small(approximately 30 μm), the particles tend to fly away from the plasma core. Similarly, an appropriate SOD should provide the particles with more melting time, thus resulting in a dense coating. On the other hand, a larger SOD leads to the solidification of the molten particles before the droplets can reach the substrate. All these effects may lead to substantial variation in the fracture toughness of the coating. The present paper attempts to correlate the plasma spraying parameters and microstructure of the coating with the fracture toughness and other primary coating properties.展开更多
文摘A binder phase of TiO based cermets, a kind of imitated gold materials, was developed by adding active element Si to Fe-Cr alloy, and the related mechanisms were studied. The wettability, matching in thermodynamics and interracial strength were investigated by the high temperature sessile drop method and element area scanning. The linear expansion coefficients of the materials were measured using TAH100 thermal analyzer. The results show that the wettability of Fe-Cr alloy on TiO are small, with a wetting angle about 90°. After adding some Si in Fe-Cr alloy, its wetting angle can be decreased to about 25°, the interracial reactions can be prevented effectively and high interface binding can be formed. Fe-25% Cr-1.5% Si matches the thermal expansion coefficient of TiO, so it is a kind of relatively perfect binder for TiO based cermets imitated gold.
基金Supported by Natural Science Foundation of Tianjin (No.06YFJMJC01000) the High Technique Research and Development Pro-gram of China (No.2001AA325110).
文摘The microwave dielectric properties of ZrO2-SnO2-TiO2 (ZST) system ceramics were studied as a function of the amount of Sb2O5 dopant. With the addition of 0-0.5% Sb2O5(molar ratio), the substitution of Ti4^+ ions with Sb^5+ ions decreased the sintering temperature and increased the quality factor Q due to the reduction of oxygen vacancies, When the amount of Sb^5+ increased further (above 0.5%), Q was decreased by increasing the electron concentration. When the system doped with 0.5% Sb2O5 was sintered at 1 150℃ for 6 h, the relative dielectric constant ε, Qf0, and the temperature coefficient of resonant frequency (TCF) were 38.46, 44 500 GHz, 20.0×10^-6/℃, respectively, at 6 GHz,
文摘Song Dynasty was very significant in Chinese feudal history, and ceramic industry boomed during that time: all kinds of kilns were scattered all over the country, and ceramic art achieved great success. Among those achievements, ceramic censers were a very typical one which features unique styles in patterns, decorations, and glaze colors. This paper covers the developing process and artistic characteristics of censers in Song Dynasty.
文摘Abstract modern social awareness and people' s aesthetic psychology has undergone tremendous changes in the design of modem ceramic art poses severe requirements. This article from the perspective of modem lifestyles, made from ceramic design concepts, modeling, implication, decoration, materials and technology and other aspects of transformation and innovation, in order to achieve adapt to the modem lifestyle, aesthetic purposes.
文摘In this work, the results of a study of laser ablation cleaning process on ceramic artifacts are presented. The experiments were conducted on a "Carosello", a structural hollow element made of clay, placed in arches, in domes or even in the walls of buildings such as churches and houses. Our results show that laser ablation techniques is able to remove the surface impurity patina from artifacts surface without changes the chemical composition and the optical properties of ceramic. Moreover, because the laser cleaning heats only locally the surface of the sample, this method don't preclude the possibility to apply on artifact the thermo-luminescence dating process.
文摘This paper describes technology of the electromagnetic pump made in a hybrid polymer-ceramic technology. The pumping mechanism is realized with a mutual excitation between an electromagnetic coil and a neodymium magnet bonded to a flexible membrane. A PDMS (poly(dimethylsiloxane)) material was used to manufacture a membrane sufficient for the presented micropump. A fish trap construction is adapted to the ceramic technology. The bonding process of ceramics and polymer, using plasma oxidation method, is described as well. Moreover, a membrane deflection depending on magnet dimensions and applied voltage was measured.
基金Project(2018CFB439)supported by the Hubei Province Natural Science Foundation,China。
文摘In order to predict the powder flow law of the injection molding process of MgTiO3 ceramic parts with complex structures,a constitutive model and numerical simulation method for MgTiO3 ceramic injection molding were established based on the Hunt method.The material parameters of MgTiO3 such as elastic modulus,Poisson ratio,glass transition temperature,thermal conductivity and specific heat capacity were measured.Based on the fitting curve and the material parameters measured,the cross-WLF viscosity model and P-V-T model required for MgTiO3 ceramic injection molding were optimized.Furthermore,the influence of process parameters on mold filling flow and distribution of parts defects was researched.It was found that the gate position,injection speed and melt temperature have greater influence on mold filling flow and the packing process has an obvious effect on parts’defects.On this basis,the MgTiO3 ceramic parts injection molding experiment verification was carried out.By comparing the experimental results with the simulated results,it is found that the deformation error is within 1.5%and the density error is within 1%.Therefore,this research provided theoretical guidance for the engineering application of MgTiO3 ceramic parts fabricated by injection molding.
基金Project (No. 2004C31044) supported by the Science & TechniqueProject of Zhejiang Province, China
文摘Silicon carbide (SiC) ceramic with YAG (Y3Al5O12) additive added by sol-gel method was liquid-phase sintered at different sintering temperatures, and the sintering mechanism and microstructural characteristics of resulting silicon carbide ceramics were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and elemental distribution of surface (EDS). YAG (yttrium aluminum garnet) phase formed before the sintering and its uniform distribution in the SiC/YAG composite powder decreased the sintering temperature and improved the densification of SiC ceramic. The suitable sintering temperature was 1860 °C with the specimen sintered at this temperature having superior sintering and mechanical properties, smaller crystal size and fewer microstructure defects. Three characteristics of improved toughness of SiC ceramic with YAG added by sol-gel method were microstructural densification, main-crack deflection and crystal ‘bridging’.
文摘Jingdezhen is a bright star to make ceramic products among all cities of the world. The actual inheritance of the famille rose decoration and color enamel craftsmanship as China's "intangible cultural heritage" is restricted not only by historical change and geographical conditions and also by how to inherit the craftsmanship. In this paper, through the literature studies, sociology investigation, market research, and comparative analysis of the traditional pastel industry in Jingdezhen, the making flows of famille rose decoration and color enamel are introduced plus the author's understanding of famille rose decoration and color enamel, and also the understanding and inheritance of Jingdezhen traditional famille rose decoration and color enamel craftsmanship as "intangible cultural heritage" are discussed. Therefore, theoretical basis and practice guidance are provided for famille rose decoration and color enamel craftsmanship to develop toward the cultural industry, and also a reference in theory and practice is available for the inheritance and development of the handmade ceramic products as "intangible cultural heritage".
文摘The word "tile" originates from Persian and means "China" or "Chinese work". In the Ottoman language, the word "tile" also means "Chinese work", or "belonging to China". The art of Turkish tiles occupies a place of prominence in the history of Islamic art. Its roots can be traced at least as far back as the Uygurs of the eighth and ninth centuries. Its subsequent development was influenced by the Karakhanids, the Ghaznavids, and (especially) Iranian Seljuk art. With the Seljuks' victory over the Byzantines at Malazgirt in 1071, the art followed them into Anatolia and embarked upon a new period of strong development fostered by the Anatolian Seljuk sultanate. The first major development in the art of tile-making occurred primarily in Anatolian Seljuk architecture. Various techniques have been used in the art of tiles which gave hundreds of samples for centuries. This study explores the glazed tile techniques used in the production of the S elj uk and Beylik periods.
基金Supported by the National Natural Science Foundation of China(No.51378332 and No.20806051)Science and Technology Project of Housing and Urban-Rural Ministry(No.2014-K4-014)Chinese Postdoctoral Science Foundation(No.2013M530872)
文摘Glass-ceramics obtained from the electric arc furnace molten slag of incinerator fly ash was produced by applying nucleation and crystallization through heat treatment process. The effects of nucleating agent (TiO2 and Cr2O3) on the crystallization kinetics and heat treatment schedule of the slag were investigated. The results show that the nucleating agents changed the crystallization phase and morphology of the obtained glass-ceramics. The optimum heat treatment schedule of the glass with TiO2 was determined as nucleation at 952 K for 1.5 h and crystal growth at 1 258 K for 1.5 h, while those values with Cr203 were estimated at 971 K for 2 h and at 1 238 K for 2 h. TiO2 acting as nucleating agent could decrease the activation energy of the slag and shorten the total thermal treatment time in comparison with Cr2O3. The glass-ceramics obtained under the optimum heat treatment condition was environmentfriendly and had remarkable physical/mechanical properties and chemical durability.
基金Supported by the National Natural Science Foundation of China(21276124,21125629,21076102)Research Project of Natural Science for Universities Affiliated with Jiangsu Province(10KJB530002)+1 种基金Key Projects in the National Science&Technology Pillar Program(2011BAE07B09-3)Jiangsu Province Industrial Supporting Project(BE2011831)
文摘Membrane filtration technology combined with coagulation is widely used to purify river water.In this study,microfiltration(MF)and ultrafiltration(UF)ceramic membranes were combined with coagulation to treat local river water located at Xinghua,Jiangsu province,China.The operation parameters,fouling mechanism and pilot-scale tests were investigated.The results show that the pore size of membrane has small effect on the pseudo-steady flux for dead-end filtration,and the increase of flux in MF process is more than that in UF process for cross-flow filtration with the same increase of cross-flow velocity.The membrane pore size has little influence on the water quality.The analysis on membrane fouling mechanism shows that the cake filtration has significant influence on the pseudo-steady flux and water quality for the membrane with pore size of 50,200 and 500 nm.For the membrane with pore size of 200 nm and backwashing employed in our pilot study,a constant flux of 150L·m 2·h 1was reached during stable operation,with the removal efficiency of turbidity,total organic carbon(TOC)and UV254 higher than 99%,45%and 48%,respectively.The study demonstrates that coagulation-porous ceramic membrane hybrid process is a reliable method for river water purification.
文摘In this experimental study, chromium oxide powder was sprayed on a low-carbon steel substrate using the atmospheric plasma spray process. The current and standoff distances(SODs) were varied to study their effect on the fracture toughness of the coatings. Theoretically, as the arc current increases, the melting of the ceramic oxide should increase and this in turn should lead to the formation of a dense coating. However,it was observed that if the arc power is too high and because the particle size of the powder is small(approximately 30 μm), the particles tend to fly away from the plasma core. Similarly, an appropriate SOD should provide the particles with more melting time, thus resulting in a dense coating. On the other hand, a larger SOD leads to the solidification of the molten particles before the droplets can reach the substrate. All these effects may lead to substantial variation in the fracture toughness of the coating. The present paper attempts to correlate the plasma spraying parameters and microstructure of the coating with the fracture toughness and other primary coating properties.