摘要
采用"连续有序可控爆发式成核"纳米粉体制备技术,以BaCl2、SrCl2.6H2O、TiCl4为原料制备了BaxSr1–xTiO3及BaxSr1–x–yGdyTiO3纳米粉体和陶瓷,研究了所制粉体和陶瓷的微观结构及性能。结果表明:所制纳米粉体分散性好,粒径分布范围窄,平均粒径小于40nm;BaxSr1–xTiO3介电常数随锶掺杂量的增加有增大的趋势,在1 325℃烧结得到的Ba0.7Sr0.3TiO3陶瓷的介电常数最大,达到30 000 F/m。BaxSr1–x–yGdyTiO3介电常数随Gd掺杂量的增加趋于减小,在1 325℃烧结得到的Ba0.8Sr0.18Gd0.02TiO3的介电常数最大,达到近25 000 F/m。
BaxSr1-xTiO3 and BaxSr1-x-yGdyTiO3 nano-powders and ceramics were prepared by the technology of continuous and orderly controlled explosive nueleation nanoparticles powders preparation, and using BaCl2, SrCl2· 6H2O, TIC14 as raw material. The microstructure and properties of prepared powders and ceramics were studied. The results show that the nano-powders possess good dispersion, narrow particle size distribution on the average particle size of less than 40 nm. The permittivities of the BaxSr1-xTiO3 ceramics increase with increasing of Sr doping amount. The permittivity of Ba0.TSr0.3TiO3 ceramic sintered at 1 325 ℃ reaches the maximum of 30 000 F/m. The permittivities of BaxSr1-x-y GdyTiO3 ceramics decrease with iricreasing of Gd doping amount. The permittivity of Ba0.8Sr0.18Gd0.02TiO3 ceramic sintered at 1 325 ℃reaches the maximum of 25 000 F/m.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第8期1-4,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.50272002
No.50372001)
辽宁省教育厅重点实验室基金资助项目
