Paper Title:
Nanopowder and Fine-Grained Ceramics for Multilayer PTCR Elements
  Abstract

BaTiO3 nanopowders prepared by sol-gel process were used for multilayer PTCR ceramics in order to utilize grain boundary effect and lower sintering temperature. The precursor gel was calcined at different temperatures and the powders were characterized by XRD and TEM. The average grain size was about 26nm when calcined at 800°C for 2h. Effects of acceptor/donor concentration and sintering temperature on PTCR ceramics were also investigated. The optimal concentration of the donor was found to be 0.6mol with the acceptor concentration being 1/8 of the donor. Multilayer PTCR elements were fabricated by tape-casting technique. The jump ratio of PTCR chips sintered at 1240°C was above 103 with the average grain size smaller than 1~2 μm, which is suitable for the multilayer PTCR elements.

  Info
Periodical
Key Engineering Materials (Volumes 368-372)
Edited by
Wei Pan and Jianghong Gong
Pages
453-455
DOI
10.4028/www.scientific.net/KEM.368-372.453
Citation
J. Zhao, S. P. Gong, C. F. Cheng, Z. P. Zheng, H. Liu, D. X. Zhou, "Nanopowder and Fine-Grained Ceramics for Multilayer PTCR Elements", Key Engineering Materials, Vols. 368-372, pp. 453-455, 2008
Online since
February 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Chao Fang, Dong Xiang Zhou, Hu An Liu, Shu Ping Gong
Abstract:The positive temperature coefficient of resistivity (PTCR) behavior of semiconductive BaTiO3 ceramics is often explained by the Heywang...
1692
Authors: Sasiporn Prasertpalichat, Muangjai Unruan, J. Tungsritrakul, Rattikorn Yimnirun
Abstract:It is well known that acceptor and donor doping results in opposite ferroelectric aging effects; however, the aging effects in hybrid-doped...
233
Authors: Ning Zhang Wang, Sha Sha, Yu Tian Ma
Abstract:MnCO3, CuO, NiO and Fe2O3 doped SrTiO3 multifunction ceramics were fabricated firstly. The microstructure and electrical properties were...
1603
Authors: Ning Zhang Wang, Zhang Wen
Chapter 5: Ceramic
Abstract:CuO and MnCO3 doped SrTiO3-based multifunction ceramics were prepared respectively with solid state reaction method...
783
Authors: Eon Jong Lee, Byeong Woo Lee
Chapter 4: Non-Metals and Building Materials
Abstract:The effects of the complex donor and acceptor additives on the microstructure, piezoelectric and dielectric properties of PZT (Zr/Ti=53/47)...
259