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溶胶-凝胶法PLT薄膜的形成与热处理温度关系研究 杜丕一1,沈鸽1 (1.浙江大学硅材料国家重点实验室,杭州,310027) 摘要:利用溶胶-凝胶法合成了透明溶胶和白色稳定乳浊液两种前驱体,通过Dip-coating方法分别利用掺入及不掺入同配方的晶体微粉的这两种前驱体制备了Pbo 9Lao 15TiOa薄膜,并通过X射线衍射(XRD),扫描电子显微镜(SEM)和介电常数测试等手段进行了形成特性研究和比较.结果显示,利用白色乳浊液前驱体制备的Pb0.9La0.15TiO3薄膜,其最初形成钙钛矿相的温度比利用透明溶胶制备的同样薄膜的温度降低约40~50°C;利用透明溶胶前驱体制备的Pb0.......
-type strontium ferrite according to calcination temperature were analyzed.Strontium ferrite Sr0.06Ca0.52La0.52Fe11.68Co0.22O19magnetic powder was prepared by a standard ceramic process.During experiments,the calcination temperature was varied from 1180 to 1260℃,and sintering temperature was fixed.While the M-phase(SrFe12O19) existed with hematite(Fe2 O3) in the powder calcined at below 1220℃,the pure......
:MnOx-CeO2 catalysts were synthesized to investigate the active sites for NO oxidation by varying the calcination temperature. XRD and TEM results showed that cubic CeO2 and amorphous MnOx existed in MnOx-CeO2 catalysts. High temperature calcination caused the sintering of amorphous MnOx and transforming to bulk crystalline Mn2O3, H2-TPR and XPS results......
:The effects of calcination and modification on the morphology(shapes and textures) and crystal structure of anhydrite powders were studied. The results show that, calcination at 100°C causes anhydrite to disintegrate into smaller crystals, accompanied by a slight increase in d-spacing. Without calcination and modification, the solidification time......
:MnOx-CeO2 catalysts were synthesized to investigate the active sites for NO oxidation by varying the calcination temperature. XRD and TEM results showed that cubic CeO2 and amorphous MnOx existed in MnOx-CeO2 catalysts. High temperature calcination caused the sintering of amorphous MnOx and transforming to bulk crystalline Mn2O3, H2-TPR and XPS results......
studied carefully.To consider the effects of Fe2O3/SrCO3mol ratio,calcination temperature,milling time and calcination time on magnetic properties of prepared strontium ferrite powders,the orthogonal... calcination temperature,and 1 h calcination time.Strontium ferrite powders synthesis method not only provides a cheap,high quality raw material for the production of strontium ferrite powders,but also......
">The effects of the calcination temperature on the oxygen content and magnetic properties of the nanocrystalline perovskite manganite La0.75Sr0.25MnO3±dprepared by the sol–gel method were... perovskite structure. As the calcination temperature and calcination time increase, the oxygen content in the samples increases from being deficient to being in excess of that in the stoichiometric......
:YAG) nanoparticles with high crystallinity and tunable grain size ranging from 19–30 nm were prepared by a modified co-precipitation process with a follow-up calcination treatment. For the synthesis... of precipitation temperature, the pH value of precipitant solutions, aging period, calcination conditions, and Ce-doping level were investigated for controlling the purity, particle size, and photoluminescence......
of the synthesized BeO nanoparticles were investigated.The calcination temperature of the gel precursor containing beryllium sulfate was determined by thermogravimetry and differential scanning... that the synthesized nanoparticles under 700 C were pure,globular and about ~5-20 nm with narrow distribution.Interestingly,the nanograins coalesced and grew under higher calcination temperatures and longer......
:YAG) nanoparticles with high crystallinity and tunable grain size ranging from 19–30 nm were prepared by a modified co-precipitation process with a follow-up calcination treatment. For the synthesis... of precipitation temperature, the pH value of precipitant solutions, aging period, calcination conditions, and Ce-doping level were investigated for controlling the purity, particle size, and photoluminescence......
