【摘要】 以混合氢氧化物固体粉末为前驱体,在一定水热处理温度和时间条件下制备了纳米级的CexZr1-xO2固溶体。XRD分析表明:焙烧前后的固溶体均与面心立方的CeO2的特征峰相符合,说明固溶体属于立方晶系;TEM分析表明:600℃焙烧后的粉体与焙烧前相比,晶界明显,晶型呈立方形;在一定水热处理时间条件下,不同的处理温度对样品的失重率影响较大,在180℃以下时,前驱体晶化不完全,且出现单斜相和四方相的ZrO2,这为水热法制备CexZr1-xO2固溶体的晶化机理研究提供一定的借鉴。经800℃焙烧1.5 h的粉体对光学玻璃有较好的抛光性能。相对高温制备样品其焙烧温度低200℃以上,并省去了后期处理过程。更多还原

【Abstract】 Using the complex hydroxide solid powder as the starting materials,the nanometer Ce_0.5Zr_0.5O₂ solid solution was prepared by hydrothermal method.XRD results show that the diffraction peaks of the solid solution before and after calcinations agree with latent peak of CeO₂（F C C）,that proves that the solid solution is F C C in structure;TEM analysis shows that the product calcined at 600 ℃ possesses more obvious boundary and F C C structure,compared with the product before calcination.;Under the condition of same hydrothermal processing time,processing temperature had important influence on the mass fraction,it was illustrated that the precursor was not crystallized completely with a monoclinic and tetragonal phase under 180 ℃,that is benficial to study on crystallization mechanism of Ce_0.5Zr_0.5O₂ solid solution.The powder calcined at 800 ℃ for 1.5 h after hydrothermal cryallization has better polishing property for optical glass,and its annealing temperature decreases 200 ℃ and so remove latter process.更多还原