Journal ArticleDOI
Semiconducting Bodies in the Family of Barium Titanates
TLDR
In this paper, anomalous resistivity-temperature characteristics found in semiconducting barium titanates were studied in relation to their composition, and the resistivity and impedance characteristics and the crystal structures were investigated for different compositions in the systems.Abstract:
The anomalous resistivity-temperature characteristics found in semiconducting barium titanates were studied in relation to their composition. The resistivity and impedance characteristics and the crystal structures were investigated for different compositions in the systems (Ba, -Sr) (Ti, Sn)O3, (Ba, Ca, Sr)TiO3) (Ba, Pb)TiO3, Ba-(Ti, Zr)O3, and Ba(Ti, Si)O3 doped with 0.1 mole % of Ce and also in the system (Ba, Mg, Ce) TiO3. Bodies whose compositions were quite different from BaTiO3 could not be semiconducting. The resistivity anomaly in each semiconducting body showed a good correlation with the crystal transition.read more
Citations
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Journal ArticleDOI
Semiconducting barium titanate
TL;DR: A survey of the chemical and physical properties of blocking layers both at surfaces and interfaces is presented in this article, where they have been used as the basis of two new types of material: Doped titanates and Barium titanates.
Journal ArticleDOI
Defect studies of doped and undoped barium titanate using computer simulation techniques
G. V. Lewis,C. R. A. Catlow +1 more
TL;DR: In this article, the authors present the results of a computer simulation study of defect energies in BaTiO 3 and propose a defect model consistent with experimental studies, where intrinsic disorder is masked by oxygen vacancies which compensate accidental acceptor impurities.
Journal ArticleDOI
Electrical conductivity in lead titanate zirconate ceramics
R. Gerson,Hans Jaffe +1 more
TL;DR: In this article, the p-type conductivity of Ferroelectric lead titanate zirconate ceramics prepared by sintering in air is found to result from an excess of lead vacancies.
Journal ArticleDOI
Interfacial Segregation in Perovskites: III, Microstructure and Electrical Properties
Seshu B. Desu,David A. Payne +1 more
TL;DR: In this paper, a model is proposed to relate segregation of dopants with the development of fine ceramic microstructures and electrical properties in polycrystalline donor-doped BaTiO3.
Journal ArticleDOI
Electrical Conduction Anomaly in Samarium-Doped Barium Titanate
TL;DR: In this paper, the positive temperature coefficient (PTC) electrical resistivity anomaly originates at the grain boundaries of the poramics of samarium-doped BaTiO3 having identical compositions.
References
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Journal ArticleDOI
Properties of Semiconductive Barium Titanates
TL;DR: In this paper, the resistivity of barium titanate has been shown to be remarkably reduced with suitable control in valency, which is usually of the order of 10 9 ∼10 12 ohm-cm.
Journal ArticleDOI
Preparation of barium titanyl oxalate tetrahydrate for conversion to barium titanate of high purity
TL;DR: In this article, a procedure was described for preparing barium titanyl oxalate tetrahydrate, BaTiO (Cz0 4h4HzO), in which the mole ratio of TiOz to BaO is unity.
Journal ArticleDOI
Phase Equilibria in the System BaTiO3—CaTiO3
R. C. DeVries,Rustum Roy +1 more
TL;DR: The system BaTiO3-SiO2 is characterized by two congruently melting compounds and a compound having a subsolidus stability maximum as discussed by the authors, and three intermediate compounds have been shown to exist in the system.
Journal ArticleDOI
Structural Behavior in the System (Ba, Ca, Sr) TiO3 and Its Relation to Certain Dielectric Characteristics
TL;DR: In this paper, the effect of strontium additions on the immiscibility region between barium titanate and calcium titanate was studied and it was found that the two-phase gap is closed by about 18% strontia titanate when the specimens are fired at 1430°C; at lower firing temperatures the gap is greater and there is evidence of incomplete reaction.