A1_2O_3在一次烧结BaTiO_3中的作用探讨

Function of Al_2O_3 in the One time Sintering Process of Thermistor BaTiO_3

探索了掺微量Al2 O3 和SiO2 的BaTiO3 的一次烧结工艺 ,该工艺有效降低了烧结温度 .应用电子探针、光学显微镜、X射线衍射仪 ,TN - 5 2 4能谱等设备对样品进行分析 .BaTiO3 瓷体电阻随Al2 O3 掺杂量的变化关系及Al在BaTiO3 中分布情况等实验事实 ,表明在BaTiO3 烧结过程中Al可能是一种半导化元素 ,起施主的作用 .通过新工艺 ,得到了性能较好的BaTiO3

One time sintering of BaTiO 3 with Al 2O 3 and SiO 2 minim adulterants was studied.This technique decreased sintering temperature.Samples were studied by Electron Probe,Optical Microscope,and X-ray diffraction instrument,etc.According to experimental facts of the distribution of Al in the samples and the resistance variation of BaTiO 3 thermistor with different quantity of Al 2O 3,it was concluded that Al might be an element that promotes semi-conduction and its function could be regarded as a donor.BaTiO 3 thermistor with better qualities was obtained by new technique.