口腔氧化锆纳米粉体的制备及性能研究

发布时间：2018-04-27 18:18

  本文选题：盐助溶液燃烧法 + Y-TZP　； 参考：《口腔医学研究》2017年03期

【摘要】：目的:探讨盐助溶液燃烧法(Salt-assisted solution Combustion Synthesis,SSCS)的工艺条件,制备性能优良的3mol%氧化钇(Y2O3)稳定四方相多晶体氧化锆(3Y-TZP)纳米粉体。方法:以硝酸氧锆和尿素为原料,采用SSCS法和冷冻干燥法制备3Y-TZP纳米粉体。利用热重-差热分析(TG-DTA)、X射线衍射仪(XRD)和透射电镜(TEM)检测分析粉体表征。采用正交试验考察了锆离子的浓度(A)、尿素和金属硝酸盐摩尔比(B)、KCL和金属硝酸盐摩尔比(C)、前驱体的引燃温度(D)对粉体晶粒度的影响。结果:前驱体引燃温度和尿素加入量是最重要的影响因素,最佳的工艺条件是A:0.085mol/L,B:1,C:3,D:400℃。产物经XRD检测分析为四方相多晶体氧化锆,晶粒度(DXRD)为2.9~9.0nm。TEM观察在最优工艺水平下制备的粉体形貌为球形、高分散的、低团聚的、平均粒径约为5.38nm的纳米粉体,与DXRD基本一致。并且随着引燃温度的增加粉体粒径变大,而且团聚加重。结论:通过盐助溶液燃烧法可以制备性能良好的3Y-TZP纳米粉体。
[Abstract]:Objective: to study the process conditions of salt-assisted solution Combustion synthesis (SSCS) and to prepare 3 mol% yttrium oxide (Y2O3) stabilized tetragonal polycrystalline zirconia 3Y-TZP nanoparticles. Methods: using zirconium nitrate and urea as raw materials, 3Y-TZP nano-powders were prepared by SSCS and freeze-drying methods. The powder was characterized by thermogravimetric differential thermal analysis (TG-DTAA) X-ray diffractometer (XRD) and transmission electron microscopy (TEM). The effects of concentration of zirconium ion, molar ratio of urea to metal nitrate, molar ratio of metal nitrate, and ignition temperature of precursor on the grain size of powders were investigated by orthogonal test. Results: the most important influencing factors were ignition temperature of precursor and amount of urea. The optimum technological conditions were as follows: a: 0.085 mol / L, B: 1, C: 3, D: 400 鈩，

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