摘要
采用草酸盐共沉淀法制备了Mn-Ni-Fe-O体系NTC(Negative Temperature Coefficient)热敏陶瓷,并运用XRD,SEM和电学性能测试等手段研究陶瓷样品的相结构和电学性能,重点考察了降温速率对电学性能的影响。结果表明:慢速降温条件下样品的电阻率低于快速降温的电阻率,降温速率对Mn-Ni-Fe-O系NTC热敏陶瓷的电学性能影响很大,尤其是当Fe元素含量较高时这种影响更大。
Mn-Ni-Fe-O system negative temperature coefficient（NTC） ceramics oxalate precipitations were prepared by oxalate co-precipitation method.The phase structure and electrical properties of the as-prepared ceramics were characterized using XRD,SEM and electrical measurement.The effects of cooling rate on the electrical performances was investigated systematically.The results show that the resistivities of ceramics with slow cooling rate are less than that of fast cooling rate.Cooling rate influences the resistivity of Mn-Ni-Fe-O ceramics remarkably,especially showing greater effects on the ceramic samples containing high concentration of iron.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2011年第7期22-24,共3页
Electronic Components And Materials
基金
合肥三晶电子有限公司委托项目(No.10-088)
