硅酸盐学报2008，Vol.36Issue(12)：1735-1738,4.
氧化锆复合的Fe0.5Mn1.84Ni0.66O4负温度系数热敏陶瓷
ZIRCONIUM OXIDE-COMPOSITED Fe0.5Mn1.84Ni0.66O4 NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR CERAMICS
摘要
Abstract
Negative temperature coefficient(NTC)thermistors of Fe0.5Mn1.84Ni0.66O4 with spinel structure,composited with zirconium oxide(ZrO2),were prepared by the Pechini method.The phase composition and microstructure were characterized using X-ray diffraction and scanning electron microscope,and the electric properties were also measured.The experimental results show that much ZrO2 with monoclinic structure was homogeneously dispersed in the spinel grain boundary,but only a little ZrO2 could occupy the lattice in the spinel.With increasing ZrO2 content,the B value,the thermal constant(unit in Kelvin),had a little increase and then stayed constant,whereas,the resistivity had a tendency to keep increasing.Zirconium oxide could restrain the aging.The possible mechanism is that ZrO2 particles well-dispersed in the spinel grain boundary have a pinning effect on the spinel cation vacancies,which restricts the motion of cation vacancies.关键词
负温度系数/尖晶石/老化/氧化锆Key words
negative temperature coefficient/spinel/aging/zirconium oxide分类
化学化工引用本文复制引用
王忠兵,赵肃莹,韩效钊,杨萍华,陈初升..氧化锆复合的Fe0.5Mn1.84Ni0.66O4负温度系数热敏陶瓷[J].硅酸盐学报,2008,36(12):1735-1738,4.基金项目
合肥工业大学博士启动基金(106-035035)资助项目. （106-035035）
