固相法制备BaTiO3基细晶陶瓷粉体

Preparing fine-grained ceramic powders on BaTiO3 substate with solid-phase method

通过传统的固相法制备BaTiO3基细晶陶瓷粉体，讨论了在预烧温度和烧结温度相同的情况下，探讨不同施主元素的添加量对陶瓷晶粒及电性能的影响；在预烧温度和烧结温度相同的情况下，探讨不同受主杂质对陶瓷晶粒及电性能的影响；在施、受主掺杂量及烧结温度相同的情况下，探讨不同的预烧温度对陶瓷晶粒及电性能的影响．为了制备高升阻比、晶粒细小的BaTi03陶瓷，选取的材料配方为Ba1.0Ti1.01O3＋0.4％（摩尔分数）Y2O3＋0.03％（摩尔分数）Mn（NO3）2＋2％S102，粉体在1200℃预烧，保温2h，样品在1280℃烧成。上电极后测得常温电阻率为4937Ω·cm，升阻比为7．116×10^3，温度系数为14．03％，居里温度为128．4℃．

This essay aimed at introducing the traditional solid-phase method with which fine-grained ceramic powders on BaTiO3 substrate were prepared. Discussing the impact that different added Content of donor elements and acceptor impurities made on ceramic grain and electrical properties under the same presintering temperature and sintering temperature conditions. Discussing the impact that different presintering temperature made on ceramic grain and electrical properties under the same content of donor and acceptor doping and sintering temperature conditions. To prepare the high lift-to-drag ratio and fine-grained BaTiO3 cerami, the selected powders were Bal.0Ti1.01O3＋0.4mol%Y2O3＋0.03mol%Mn（NO3）2＋2%SiO2.The powders were presentered at 1,200℃ and maintained constant temperature for 2h Then the samples were sintered at 1℃. After fitting with electrodes, measurement parameters were as follows：room temperature resistivity was 4937Ω·cm, lift-to-drag ratio was 7.116×10^3, temperature coefficient was 14.03% and curie temperature was 128.4℃.