The doping effects of NiNb2O6, CaZrO3 and MnCO3 on the dielectric properties and breakdown voltages of fine grain BaTiO3 systems were studied. NiNb2O6 can shift the Curie temperature and broaden it, and makes contributions to double peaks; CaZrO3 may improve the temperature coefficiency characteristic greatly and enhance the withstand voltage; adding MnCO3 can restrain the overgrowth of particles, which can decease the dielectric dissipation and improve the withstand voltage greatly. With adding 2.5mol% NiNb2O6, 1.5mol% CaZrO3 and 0.1mol% MnCO3, a kind of MLC ceramic with low frequent and high voltage can be got, which also meets X8R requirement, and its dielectric properties are as follows: ε≥2600, Δ C/C 20℃≤±15% (-55℃-- +150℃), tgδ≤0.7%, Eb≥15kV/mm.
LI Ling-Xia
,
GUO Rui
,
WANG Hong-Ru
. Dielectric Properties of High-voltage X8R Dielectric Material with Different Kinds of Dopants[J]. Journal of Inorganic Materials, 2007
, 22(4)
: 711
-714
.
DOI: 10.3724/SP.J.1077.2007.00711
[1] 向 勇. 电子元件与材料, 1996, 15 (5): 5--10.
[2] 李龙土. 功能材料, 2004, 35(增刊): 21--23.
[3] Zhang Shuren. Journal of Materials Science, 2005, 16 (10): 669--672.
[4] Zuo Ruzhong. Journal of the European Ceramic Society, 2001, (21): 2925--2929.
[5] Qi Jianquan. Materials Chemistry and Physics, 2003, 82: 423--427.
[6] 郭 炜, 李玲霞. 稀有金属材料与工程, 2005, 34 (5): 764--767.
[7] 黄新友. 硅酸盐学报, 2005, 33 (3): 402--406.
[8] 周晓华, 等. 材料导报, 2006, 20 (3): 132--134.
[9] Garcia D, Eiras J A. Ferroelectrics., 1991, 123: 51--59.
