摘要
为获得低室温电阻率的PTC材料,以草酸为沉淀剂,采用液相包裹法制备了NiC2O4·2H2O/BaTiO3前躯体,并由其热分解制得Ni/BaTiO3基陶瓷复合材料。对该复合材料的研究表明,在还原气氛下烧成的Ni/BaTiO3基陶瓷复合材料具有很弱的PTC效应,但其PTC效应可通过适当的热处理工艺(600℃,空气气氛)得到有效恢复。其升阻比与室温电阻率为:(ρmax/ρmin=60)和(ρ=6.1?·cm)。
Prepared was the Ni/BaTiO3 composite by decomposition of NiC2O4·2H2O/BaTiO3 precursor, which was obtained by precipitating of nickel in the form of oxalate into the BaTiO3 slurry. Prepared composite had very weak PTC effect, which was renewed effectively by heat-treatment in air. Under proper process and composition, this composite showed obvious PTC effect (ρmax/ρmin= 60) and low room-temperature resistivity (ρ = 6.1 ?·cm).
出处
《电子元件与材料》
CAS
CSCD
北大核心
2005年第7期17-20,共4页
Electronic Components And Materials
