摘要
通过复合柠檬酸盐溶液喷雾干燥法制备掺杂ＢａＴｉＯ３粉末，再经液相包裹法添加烧结助剂和受主杂质，制得了超细、化学均匀性好、烧结活性大的ＰＴＣＲ粉末。掺杂ＢａＴｉＯ３粉末的实际粒径范围为２０～５０ｎｍ，烧结助剂和受主杂质可通过液相包裹技术均匀地包裹在掺杂ＢａＴｉＯ３超细粉末颗粒表面，用这种粉末烧结制得的ＰＴＣＲ样品，具有良好的ＰＴＣＲ效应（开阻比Ｒｍａｘ／Ｒｍｉｎ＝１０６，开阻温区ΔＴ＝１１０℃，阻温系数α３０＝２６×１０－２／℃）。
Ultrafine and homogeneous PTCR powder with good activity in sintering was prepared in two chemical processes: citrate solution process and liquid phase coating process. The physical and chemical properties of the powder were reported in detail. Partical size of the PTCR powder was about 20～50 nm. Sintering aids and acceptor can be coated uniformly on the surface of doped BaTiO 3 powder through the liquid phase coating process. Sintered with this powder, samples with excellent PTCR effects can be obtained.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1997年第1期72-77,共6页
Journal of The Chinese Ceramic Society
