O644.18 2003042798激光诱导环氧树脂表面液相化学局域增强沉积镍的实验研究=Near infrared laser-induced chemical localized depositionsof nickel on the substrate of epoxy resin[刊,中]/黄妙良(华侨大学材料物理化学研究所.福建...O644.18 2003042798激光诱导环氧树脂表面液相化学局域增强沉积镍的实验研究=Near infrared laser-induced chemical localized depositionsof nickel on the substrate of epoxy resin[刊,中]/黄妙良(华侨大学材料物理化学研究所.福建,泉州(362011)),林建明…∥激光杂志.-2002,23(1).-48-49利用1079.5 nm Nd:YAP激光作诱导光源,环氧树脂作为基体,研究了激光功率、辐照时间对激光诱导化学局域镀覆金属镍的形成过程、微观形貌、厚度分布影响规律,确定了最佳的激光工艺参数。图3参11(李瑞琴)TB43 2003042799脉冲准分子激光淀积薄膜的实验研究=Study of pulsedexcimer laser deposited films[刊,中]/刘晶儒(西北核技术研究所.陕西,西安(710024)),白婷…展开更多
Ceramics in general and particularly alumina （Al2O3） are important materials in various industries, but the main problem with these materials is related to some of their mechanical properties including low resistanc...Ceramics in general and particularly alumina （Al2O3） are important materials in various industries, but the main problem with these materials is related to some of their mechanical properties including low resistance against mechanical shock （hardness-toughness）, which makes them to be so brittle, and possession of high degree of porosity which reduces their strength and gives them fragile characteristics. Researchers report indicates that the presence of the second phase with suitable properties can improve some of the mechanical properties of these materials and optimize their characteristic. Carbon nanotubes with unique physical characteristics such as large aspect ratio, high strength and Young＇s modulus and improved thermal properties could be suitable candidates for this purpose. In this study, the growth of multi wall carbon nanotubes （MWCNTs） on the alumina support as the matrix of the composite has been carried out, using catalytic chemical vapor deposition （CCVD） method in which the iron nanoparticles has been selected as catalyst materials. Ethylene gas is used as feed materials for carbon source and argon as the carrier gas. In order to achieve a more comprehensive results, we have investigated the effects of some fabricating parameters like catalyst particle size, its weight percentage related to support material, alumina and to the some synthesizing temperature gases flow rate. Fabricated ceramics composites samples structures were analyzed using SEM images as well as Raman scattering spectra and X-ray diffraction pattern.展开更多
Nano size nickel copper ferrite powders （NiCuFe204） and nickel copper zinc ferrite powders have been prepared by a citrate gel precursor method. The resulting powders were characterized by X-ray diffraction （XRD） ...Nano size nickel copper ferrite powders （NiCuFe204） and nickel copper zinc ferrite powders have been prepared by a citrate gel precursor method. The resulting powders were characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The results showed that nickel copper ferrites and nickel copper zinc ferrites were also in the nanosaele. The NiCu ferrite powders showed extensive XRD fine broadening and sizes of crystals were calculated （from the XRD line broadening） as 26 run-44 run over the temperature range is 200-800℃. The NiCuZn ferrite powders showed XRD line broadening and sizes of of crystals were calculated 46-65 nm over 200-800℃.展开更多
Cubic phase spherical zirconia nano-powder was prepared by a direct template route in the lamellar liquid crystal formed by polyoxyethylene tert-octylphenyl ether(Triton X-100)/sodium dodecyl sulfate(SDS)/H_2O.The pre...Cubic phase spherical zirconia nano-powder was prepared by a direct template route in the lamellar liquid crystal formed by polyoxyethylene tert-octylphenyl ether(Triton X-100)/sodium dodecyl sulfate(SDS)/H_2O.The precursor powder and zirconia powder were characterized by XRD,FT-IR,TG/DSC,TEM,and SEM methods.Results show that the stability of the lamellar liquid crystal is controlled by NH_3·H_2O concentration.The size of nanoparticles is greatly affected by NH_3·H_2O and ZrOCl_2·8H_2O concentrations.The zirconia nanoparticles show narrow particle size distribution of 10-30 nm.展开更多
文摘O644.18 2003042798激光诱导环氧树脂表面液相化学局域增强沉积镍的实验研究=Near infrared laser-induced chemical localized depositionsof nickel on the substrate of epoxy resin[刊,中]/黄妙良(华侨大学材料物理化学研究所.福建,泉州(362011)),林建明…∥激光杂志.-2002,23(1).-48-49利用1079.5 nm Nd:YAP激光作诱导光源,环氧树脂作为基体,研究了激光功率、辐照时间对激光诱导化学局域镀覆金属镍的形成过程、微观形貌、厚度分布影响规律,确定了最佳的激光工艺参数。图3参11(李瑞琴)TB43 2003042799脉冲准分子激光淀积薄膜的实验研究=Study of pulsedexcimer laser deposited films[刊,中]/刘晶儒(西北核技术研究所.陕西,西安(710024)),白婷…
文摘Ceramics in general and particularly alumina （Al2O3） are important materials in various industries, but the main problem with these materials is related to some of their mechanical properties including low resistance against mechanical shock （hardness-toughness）, which makes them to be so brittle, and possession of high degree of porosity which reduces their strength and gives them fragile characteristics. Researchers report indicates that the presence of the second phase with suitable properties can improve some of the mechanical properties of these materials and optimize their characteristic. Carbon nanotubes with unique physical characteristics such as large aspect ratio, high strength and Young＇s modulus and improved thermal properties could be suitable candidates for this purpose. In this study, the growth of multi wall carbon nanotubes （MWCNTs） on the alumina support as the matrix of the composite has been carried out, using catalytic chemical vapor deposition （CCVD） method in which the iron nanoparticles has been selected as catalyst materials. Ethylene gas is used as feed materials for carbon source and argon as the carrier gas. In order to achieve a more comprehensive results, we have investigated the effects of some fabricating parameters like catalyst particle size, its weight percentage related to support material, alumina and to the some synthesizing temperature gases flow rate. Fabricated ceramics composites samples structures were analyzed using SEM images as well as Raman scattering spectra and X-ray diffraction pattern.
文摘Nano size nickel copper ferrite powders （NiCuFe204） and nickel copper zinc ferrite powders have been prepared by a citrate gel precursor method. The resulting powders were characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The results showed that nickel copper ferrites and nickel copper zinc ferrites were also in the nanosaele. The NiCu ferrite powders showed extensive XRD fine broadening and sizes of crystals were calculated （from the XRD line broadening） as 26 run-44 run over the temperature range is 200-800℃. The NiCuZn ferrite powders showed XRD line broadening and sizes of of crystals were calculated 46-65 nm over 200-800℃.
文摘Cubic phase spherical zirconia nano-powder was prepared by a direct template route in the lamellar liquid crystal formed by polyoxyethylene tert-octylphenyl ether(Triton X-100)/sodium dodecyl sulfate(SDS)/H_2O.The precursor powder and zirconia powder were characterized by XRD,FT-IR,TG/DSC,TEM,and SEM methods.Results show that the stability of the lamellar liquid crystal is controlled by NH_3·H_2O concentration.The size of nanoparticles is greatly affected by NH_3·H_2O and ZrOCl_2·8H_2O concentrations.The zirconia nanoparticles show narrow particle size distribution of 10-30 nm.
