The oxidation state of sulfur is detected in Na20-CaO-SiO2 float glass by synchrotron radiation X-ray absorption near edge structure （XANES） spectra at the sulfur K edge. The measured spectra show the only presence ...The oxidation state of sulfur is detected in Na20-CaO-SiO2 float glass by synchrotron radiation X-ray absorption near edge structure （XANES） spectra at the sulfur K edge. The measured spectra show the only presence of S^6＋ in the Na20-CaO-SiO2 float glass and the oxidation state of sulfur do not change with the increase of glass depth. It is also found that, after the melt has gone through the molten tin bath, the S^6＋ is the dominant species, but S^2- is also present on both surfaces. It is not certain whether cation bonds to S^2- or not, because there are many cations dissolved in the melted tin which makes the spectrum complicated.展开更多
The chemical resistances of float-glasses subjected to different electric field strength and temperature were investigated. It is indicated that the chemical resistance increases after the float-glasses are annealed w...The chemical resistances of float-glasses subjected to different electric field strength and temperature were investigated. It is indicated that the chemical resistance increases after the float-glasses are annealed with suitable temperature and electric field strength. It is also observed that the Na＋ content varies obviously under the conditions of 570℃, 1500 V/cm and 10 min, implying that the application of thermal/electric field improves the chemical resistance of float-glass online.展开更多
Li2O-Al2O3-SiO2 glass prepared from traditional melting and cooling process was investigated.The surface characteristic of LAS glass was studied by simulating tin bath with different temperature and time,and the effec...Li2O-Al2O3-SiO2 glass prepared from traditional melting and cooling process was investigated.The surface characteristic of LAS glass was studied by simulating tin bath with different temperature and time,and the effect of surface tension/viscosity ratio on flatting time was analyzed.The results demonstrated that LAS glass can polish effectively when polishing at 1 300 ℃ for 8 min,and the optimum flatting and polishing temperature was 1 250-1 300 ℃.展开更多
CaO-Al2O3-SiO2 system float glasses were melted at an elevated temperature, and about 60% of the total energy was occupied by melting and clarification stage. In order to reduce the melting temperature of the float gl...CaO-Al2O3-SiO2 system float glasses were melted at an elevated temperature, and about 60% of the total energy was occupied by melting and clarification stage. In order to reduce the melting temperature of the float glasses, Bi2O3 was added as fluxing agent. The structure and some melting properties such as the influence of the addition of the oxidation bismuth on the properties of float glass melt, melting temperature, and the structure of glass were studied. The results showed that the basic structure was not changed with the addition of Bi2O3 from 0.5% to 2%. The viscosity of the glass melt decreased with the addition of Bi2O3 obviously, as the viscosity of the glass melt was 1.35 Pa.s, the temperature was reduced by about 30 ℃ from sample A1 to sample A5. With the increasing of Bi2O3, the bending strength of glass was reduced and the transmisivity of glass samples had no change in visible light range, and the transmissivity of the glass samples was more than 88%. The ultraviolet cut-off length showed red shift with the addition of Bi2O3. With the increasing of Bi2O3, the water resistance of the glass samples was improved.展开更多
Oxide ceramic was sprayed via high-energy plasma spray using MCrAlY manufactured with special technique as bond coating and oxide ceramic as top coating in this article. Investigation showed that the dense and highly ...Oxide ceramic was sprayed via high-energy plasma spray using MCrAlY manufactured with special technique as bond coating and oxide ceramic as top coating in this article. Investigation showed that the dense and highly adhesive coating could be obtained with optimized technique. After grinding and polishing, coating roughness was lower than 0.2μm, which could meet the requirements of lift roller. After one year service, molten Tin could not adhere to the ceramic coating,well it greatly alleviated its corrosion to the roller , kept the surface of oxide ceramic coating smooth and the improve the quality of glass due to the strengthened lift roll.展开更多
The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the ...The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the corroding tem-perature, time and solution concentration on the rate of reac-tion and the degree of corrosion were investigated; effects of the apparent activation energy and the experimental value of frequency factor on the rate constant were discussed.展开更多
Based on the experimental investigation by quantitative analysis, temperature fields of the molten glass in tin bath were numerically simulated by the finite elememt method. The experimental results show that the cool...Based on the experimental investigation by quantitative analysis, temperature fields of the molten glass in tin bath were numerically simulated by the finite elememt method. The experimental results show that the cooling rate of glass is directly proportional to the draught speed, but inversely proportional to the thickness of the glass. This model lays the foundation for computer simulation system about float glass.展开更多
Bubble defects of glass were studied by Ruman spectrum, C equivalent of glass raw materials were analyzed by chemical method, and the solubility of sulphur in glass was determined with SC-132 Sulphur Determination.. T...Bubble defects of glass were studied by Ruman spectrum, C equivalent of glass raw materials were analyzed by chemical method, and the solubility of sulphur in glass was determined with SC-132 Sulphur Determination.. Then, the relationship between glass bubble, the redox numbers of glass batch and the solubility of sulphur in float glass were discussed. The way that can improve the quality of float glass was found.展开更多
The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,t...The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,transverse and longitudinal velocity distribution of the glasses with different compositions were studied.Furthermore,the influence of these factors on the width and thickness of the flexible glass plate was investigated.It is found that the internal and external heat exchange of glass has a dominant influence on the viscosity variation during the UTG forming process,which is inconsistent with the general viscosity-temperature dependence.The glass that first reaches the lower limit of forming viscosity can significantly resist the shrinking effect caused by surface tension,making the glass wider during the forming.If the original glass width remains unchanged,the glass thickness or feeding speed is reduced,wider and thinner flexible glasses can be produced.展开更多
基金Funded by the National Natural Science Foundation of China(No.50972136)
文摘The oxidation state of sulfur is detected in Na20-CaO-SiO2 float glass by synchrotron radiation X-ray absorption near edge structure （XANES） spectra at the sulfur K edge. The measured spectra show the only presence of S^6＋ in the Na20-CaO-SiO2 float glass and the oxidation state of sulfur do not change with the increase of glass depth. It is also found that, after the melt has gone through the molten tin bath, the S^6＋ is the dominant species, but S^2- is also present on both surfaces. It is not certain whether cation bonds to S^2- or not, because there are many cations dissolved in the melted tin which makes the spectrum complicated.
基金Funded by the Key Technologies R & D Program of Hubei Province (2007AA101C25)
文摘The chemical resistances of float-glasses subjected to different electric field strength and temperature were investigated. It is indicated that the chemical resistance increases after the float-glasses are annealed with suitable temperature and electric field strength. It is also observed that the Na＋ content varies obviously under the conditions of 570℃, 1500 V/cm and 10 min, implying that the application of thermal/electric field improves the chemical resistance of float-glass online.
基金Funded partly by the National Key Technology R&D Program in the 11th Five Year Plan of China(No. 2006BAJ02B00)Natural Science Foundation of Hubei Province (No.2008CDA037)
文摘Li2O-Al2O3-SiO2 glass prepared from traditional melting and cooling process was investigated.The surface characteristic of LAS glass was studied by simulating tin bath with different temperature and time,and the effect of surface tension/viscosity ratio on flatting time was analyzed.The results demonstrated that LAS glass can polish effectively when polishing at 1 300 ℃ for 8 min,and the optimum flatting and polishing temperature was 1 250-1 300 ℃.
基金Supported by the National Basic Research Program of China(973 Program)(No.2011CB612202)
文摘CaO-Al2O3-SiO2 system float glasses were melted at an elevated temperature, and about 60% of the total energy was occupied by melting and clarification stage. In order to reduce the melting temperature of the float glasses, Bi2O3 was added as fluxing agent. The structure and some melting properties such as the influence of the addition of the oxidation bismuth on the properties of float glass melt, melting temperature, and the structure of glass were studied. The results showed that the basic structure was not changed with the addition of Bi2O3 from 0.5% to 2%. The viscosity of the glass melt decreased with the addition of Bi2O3 obviously, as the viscosity of the glass melt was 1.35 Pa.s, the temperature was reduced by about 30 ℃ from sample A1 to sample A5. With the increasing of Bi2O3, the bending strength of glass was reduced and the transmisivity of glass samples had no change in visible light range, and the transmissivity of the glass samples was more than 88%. The ultraviolet cut-off length showed red shift with the addition of Bi2O3. With the increasing of Bi2O3, the water resistance of the glass samples was improved.
文摘Oxide ceramic was sprayed via high-energy plasma spray using MCrAlY manufactured with special technique as bond coating and oxide ceramic as top coating in this article. Investigation showed that the dense and highly adhesive coating could be obtained with optimized technique. After grinding and polishing, coating roughness was lower than 0.2μm, which could meet the requirements of lift roller. After one year service, molten Tin could not adhere to the ceramic coating,well it greatly alleviated its corrosion to the roller , kept the surface of oxide ceramic coating smooth and the improve the quality of glass due to the strengthened lift roll.
文摘The corrosion of a ZrO2 containing alkali re-sistant silicate glass, float glass and silica glass caused by the aqueous solution of NaOH was studied by use of correlation method with spectrophotometry. Effects of the corroding tem-perature, time and solution concentration on the rate of reac-tion and the degree of corrosion were investigated; effects of the apparent activation energy and the experimental value of frequency factor on the rate constant were discussed.
文摘Based on the experimental investigation by quantitative analysis, temperature fields of the molten glass in tin bath were numerically simulated by the finite elememt method. The experimental results show that the cooling rate of glass is directly proportional to the draught speed, but inversely proportional to the thickness of the glass. This model lays the foundation for computer simulation system about float glass.
文摘Bubble defects of glass were studied by Ruman spectrum, C equivalent of glass raw materials were analyzed by chemical method, and the solubility of sulphur in glass was determined with SC-132 Sulphur Determination.. Then, the relationship between glass bubble, the redox numbers of glass batch and the solubility of sulphur in float glass were discussed. The way that can improve the quality of float glass was found.
基金the National Key Research and Development Program of China(No.2022YFB3603300)。
文摘The forming process of the flexible ultrathin glasses(UTG)prepared by the redrawing method was numerically simulated using ANSYS Polyflow software.In the forming process by the redrawing method,temperature,viscosity,transverse and longitudinal velocity distribution of the glasses with different compositions were studied.Furthermore,the influence of these factors on the width and thickness of the flexible glass plate was investigated.It is found that the internal and external heat exchange of glass has a dominant influence on the viscosity variation during the UTG forming process,which is inconsistent with the general viscosity-temperature dependence.The glass that first reaches the lower limit of forming viscosity can significantly resist the shrinking effect caused by surface tension,making the glass wider during the forming.If the original glass width remains unchanged,the glass thickness or feeding speed is reduced,wider and thinner flexible glasses can be produced.
