Ni-BaTiO3 interface phenomenon of Co-fired PTCR by aqueous tape casting

摘要：

The green sheets with Ni paste as inner electrodes were sintered at 1 320 ℃ for 1 h under a N2/H2 mixing gas at an oxygen partial pressure p(O2)=1081012 MPa,and then reoxided at 9001 000 ℃ to form multilayer positive temperature coefficient of resistance(PTCR).During the experiments,electronic characteristic effects of PTC with different thicknesses were contrasted.A certain extending of Ni diffusion is beneficial to the ohmic contact of multilayer PTCR but excessive diffusion is harmful to PTCR.The diffusion was studied by scanning electron microscopy(SEM) and energy-dispersive X-ray spectrometry(EDS).Inter-diffusion of element takes place along the Ni-BaTiO3 interface,especially Ni diffusion to BaTiO3 dominated the process.Furthermore,the degree of Ni diffusion is very severe as ceramic layers are very thin.

关键词： Ni positive temperature coefficient of resistance BaTiO3 diffusion

作者: CHEN Yong GONG Shu-ping YU Shi-jin XU Ling-fang

作者单位: Department of Electronic Science and Technology,Huazhong University of Science and Technology,Wuhan Department of Electronic Science and Technology,Huazhong University of Science and Technology,Wuhan Key Laboratory of Ferroelectric and Piezoelectric Materials and Devices of Hubei Province,School of

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）