Effects of SiO2addition on Ba excessive barium titanate ceramics sintered in reducing atmosphere for laminated PTCR thermistors

2014 ◽  
Vol 18 (sup2) ◽  
pp. S2-172-S2-176 ◽  
Author(s):  
J. Q. Liu ◽  
S. P. Gong ◽  
L. Quan
Keyword(s):  
Barium Titanate ◽  
Reducing Atmosphere ◽  
Titanate Ceramics

DC AND AC ELECTRICAL PROPERTIES OF PTC BARIUM TITANATE CERAMICS

1990 ◽  
Vol 51 (C1) ◽  
pp. C1-979-C1-984
Author(s):  
S. HISHITA ◽  
J. F. BAUMARD ◽  
P. ABELARD
Keyword(s):  
Electrical Properties ◽  
Barium Titanate ◽  
Ac Electrical Properties ◽  
Titanate Ceramics

Defect properties of cobalt-doped hexagonal barium titanate ceramics

2015 ◽  
Vol 27 (29) ◽  
pp. 295901 ◽  
Author(s):  
H T Langhammer ◽  
R Böttcher ◽  
T Müller ◽  
T Walther ◽  
S G Ebbinghaus
Keyword(s):  
Barium Titanate ◽  
Titanate Ceramics

Investigation of the sintering of barium titanate ceramics by oxygen coulometry

2001 ◽  
Vol 21 (10-11) ◽  
pp. 1893-1897 ◽  
Author(s):  
H.T. Langhammer ◽  
Q.M. Song ◽  
H.-P. Abicht
Keyword(s):  
Barium Titanate ◽  
Titanate Ceramics

Preparation of barium titanate ceramics from amorphous fine particles of the Ba–Ti–O system and its dielectric properties

1995 ◽  
Vol 10 (2) ◽  
pp. 306-311 ◽  
Author(s):  
S. Wada ◽  
T. Suzuki ◽  
T. Noma
Keyword(s):  
Dielectric Properties ◽  
Barium Titanate ◽  
Curie Temperature ◽  
Decomposition Method ◽  
Fine Particles ◽  
Nitrate Solution ◽  
Pressing Method ◽  
Calcination Temperatures ◽  
Grain Sizes ◽  
Titanate Ceramics

Using titanium nitrate solution stabilized by chelation, amorphous fine particles of the Ba-Ti-O system were prepared by the mist decomposition method in air. After calcination of these particles, barium titanate ceramics were prepared using the hot uniaxial pressing method, and various properties were investigated. As a result, the grain sizes could be controlled over the range from 58 nm to 187 nm by the sintering temperatures and/or the calcination temperatures, keeping the density almost constant. Moreover, the dielectric properties of the samples showed that the relative permittivity decreased with decreasing grain size, and Curie temperature also shifted to lower temperatures in the same way. In this study, we first found that Curie temperature existed in the barium titanate ceramics with grain sizes from 58 to 147 nm.

Water-Induced Degradation of Barium Titanate Ceramics Studied by Electrochemical Hydrogen Charging

2003 ◽  
Vol 86 (4) ◽  
pp. 735-37 ◽  
Author(s):  
Wan Ping Chen ◽  
Xiang Ping Jiang ◽  
Yu Wang ◽  
Zhi Peng ◽  
Helen Lai Wah Chan
Keyword(s):  
Barium Titanate ◽  
Hydrogen Charging ◽  
Titanate Ceramics

Experimental assessment of the inhibition of reduction of Ca2+-doped barium titanate in a reducing atmosphere

1999 ◽  
Vol 14 (5) ◽  
pp. 1910-1915 ◽  
Author(s):  
Tsang-Tse Fang ◽  
Jyh-Tzong Shuei
Keyword(s):  
Barium Titanate ◽  
Formation Mechanism ◽  
Driving Force ◽  
Experimental Assessment ◽  
Reducing Atmosphere ◽  
Doped Barium Titanate

Several experiments have been conducted to assess the possible mechanisms for the inhibition of reduction of Ca2+-doped barium titanate in a reducing atmosphere. Three methods, i.e., conventional, semiwet, and citrate processes, have been used to prepare the powders. It was found that the formation mechanism would influence the occupation of Ca2+ in the B site. Moreover, it was concluded that Ca2+ occupation of the B site is the major cause for the inhibition of reduction of Ca2+-doped barium titanate. Ti deficiency would be the driving force for Ca2+ to occupy the B site.

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