TY - JOUR
T1 - Microstructural design of BaTiO 3-based ceramics for temperature-stable multilayer ceramic capacitors
AU - Wang, Jing
AU - Jiang, Shenglin
AU - Jiang, Dan
AU - Tian, Jiajia
AU - Li, Yunlong
AU - Wang, Yue
PY - 2012/9
Y1 - 2012/9
N2 - In order to satisfy EIA X8R specification, a new type of BaTiO 3-based ceramic with hierarchical structure in a formula scheme "a ferroelectric ABO 3 + another ferroelectric ABO 3", was designed. There were (Ba, Bi)TiO 3 and Ba(Ti, Zr)O 3 phases with different Curie temperatures coexisting in the grains from inside to outside, prepared by wet chemical method under 100 °C. The hierarchical structure of the ceramic grains was proved by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The dielectric constant of (Ba, Bi)TiO 3-Ba(Ti, Zr)O 3 ceramic was ∼6000, the ΔC/C 20 °C was -12.0%, 14.1%, and -8.3% at -55 °C, 130 °C, and 160 °C, respectively, and the dielectric loss is less than 0.1, which is obviously superior to (Ba, Bi)TiO 3 and Ba(Ti, Zr)O 3. The results of this work showed that the formula scheme "a ferroelectric ABO 3 + another ferroelectric ABO 3" for solid solutions is a promising approach to prepare high performance temperature-stable capacitor materials.
AB - In order to satisfy EIA X8R specification, a new type of BaTiO 3-based ceramic with hierarchical structure in a formula scheme "a ferroelectric ABO 3 + another ferroelectric ABO 3", was designed. There were (Ba, Bi)TiO 3 and Ba(Ti, Zr)O 3 phases with different Curie temperatures coexisting in the grains from inside to outside, prepared by wet chemical method under 100 °C. The hierarchical structure of the ceramic grains was proved by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The dielectric constant of (Ba, Bi)TiO 3-Ba(Ti, Zr)O 3 ceramic was ∼6000, the ΔC/C 20 °C was -12.0%, 14.1%, and -8.3% at -55 °C, 130 °C, and 160 °C, respectively, and the dielectric loss is less than 0.1, which is obviously superior to (Ba, Bi)TiO 3 and Ba(Ti, Zr)O 3. The results of this work showed that the formula scheme "a ferroelectric ABO 3 + another ferroelectric ABO 3" for solid solutions is a promising approach to prepare high performance temperature-stable capacitor materials.
KW - BaTiO -baced solid solution
KW - Dielectric ceramic
KW - Hierarchical structure
KW - Temperature-stability
UR - http://www.scopus.com/inward/record.url?scp=84862639654&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2012.04.036
DO - 10.1016/j.ceramint.2012.04.036
M3 - Article
AN - SCOPUS:84862639654
SN - 0272-8842
VL - 38
SP - 5853
EP - 5857
JO - Ceramics International
JF - Ceramics International
IS - 7
ER -