Effects of A/B cation ratio on the microstructure and lifetime of (Ba1-xCax)z(Ti0.99-yZryMn0.01)O3 (BCTZM) sintered in reducing atmosphere

Wen Hsi Lee, Tseung Yuen Tseng, D. Hennings

研究成果: Article同行評審

25 引文 斯高帕斯(Scopus)

摘要

Microstructure and dielectric properties of (Ba1-xCax)z(Ti0.99-yZryMn0.01)O3 (BCTZM) with various cation ratios (A/B) sintered in reducing atmosphere and then annealed to reoxidize the ceramic bodies were investigated. With decreasing A/B cation ratio, concurrent with the grain size reduction, the insulation resistance and lifetime of the BCTZM are both increased. The degradation of insulation resistance is closely related to oxygen partial pressure used during annealing and the resulting microstructure of the ceramics. Within the same volume, the specimen with fine grain size provides more grain boundaries, in comparison to large grain size specimens, which helps in providing an efficient diffusion pathway for oxygen during annealing. The result of oxidation of the Mn, that is, a change in the valence state of Mn from Mn+2 to Mn+3 is confirmed from thermogravimetric analysis and electron paramagnetic resonance analysis.

原文English
頁(從 - 到)157-162
頁數6
期刊Journal of Materials Science: Materials in Electronics
11
發行號2
DOIs
出版狀態Published - 2000

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 凝聚態物理學
  • 電氣與電子工程

指紋

深入研究「Effects of A/B cation ratio on the microstructure and lifetime of (Ba<sub>1-x</sub>Ca<sub>x</sub>)<sub>z</sub>(Ti<sub>0.99-y</sub>Zr<sub>y</sub>Mn<sub>0.01</sub>)O<sub>3</sub> (BCTZM) sintered in reducing atmosphere」主題。共同形成了獨特的指紋。

引用此