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Title: Effect of alkaline earth oxides on the formation of surface microphases that protect strontium titanate from reduction (in Russian)

Abstract

The authors studied the effect of addition of strontium oxide, barium oxide, and calcium oxide on the formation of surface microphases and the reduction of strontium titanate. The materials were strontium carbonate, barium carbonate, and calcium carbonate (analytical grade) and titanium dioxide (pure grade). X-ray diffraction analysis was carried out on a DRON-2.0 diffractometer (CuK/sub ..cap alpha../, Ni filter). The surface layers were studies in an electron spectrometer by ESCA (exciting irradiation Al/sub K..cap alpha../; bond energy in standard gold sample Au/sub 4/f/sub 1/2/ = 84.1 eV; depth of layer 8 nm). Samplers were prepared according to the usual ceramic technology. It was found that protection from reduction of strontium titanate that is doped with calcium, strontium, or barium oxide is related to the formation of surface microphases that are close to M/sub 2/TiO/sub 4/ in composition and do not undergo reduction when calcined in a medium at low partial pressure of oxygen.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
6198223
Resource Type:
Journal Article
Journal Name:
J. Appl. Chem. USSR (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 59:2; Other Information: Translated from Zh. Prikl. Khim.; 59: No. 2, 252-255(Feb 1986)
Country of Publication:
United States
Language:
Russian
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BARIUM OXIDES; METALLURGICAL EFFECTS; CALCIUM OXIDES; STRONTIUM OXIDES; STRONTIUM TITANATES; CRYSTAL DOPING; PHASE STUDIES; PROTECTIVE COATINGS; REDUCTION; CALCINATION; CERAMICS; COMPARATIVE EVALUATIONS; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRIC CONDUCTIVITY; ELECTRICAL INSULATORS; ELECTRON SPECTRA; INHIBITION; LATTICE PARAMETERS; SOLID SOLUTIONS; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COATINGS; COHERENT SCATTERING; DECOMPOSITION; DIFFRACTION; DISPERSIONS; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; EQUIPMENT; MATERIALS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PYROLYSIS; SCATTERING; SOLUTIONS; SPECTRA; STRONTIUM COMPOUNDS; THERMOCHEMICAL PROCESSES; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360205 - Ceramics, Cermets, & Refractories- Corrosion & Erosion; 400201 - Chemical & Physicochemical Properties

Citation Formats

Aksenova, L A, Kostikov, Yu P, Leonov, A I, Rotenberg, B A, and Strykanov, V S. Effect of alkaline earth oxides on the formation of surface microphases that protect strontium titanate from reduction. United States: N. p., 1986. Web.
Aksenova, L A, Kostikov, Yu P, Leonov, A I, Rotenberg, B A, & Strykanov, V S. Effect of alkaline earth oxides on the formation of surface microphases that protect strontium titanate from reduction. United States.
Aksenova, L A, Kostikov, Yu P, Leonov, A I, Rotenberg, B A, and Strykanov, V S. 1986. "Effect of alkaline earth oxides on the formation of surface microphases that protect strontium titanate from reduction". United States.
@article{osti_6198223,
title = {Effect of alkaline earth oxides on the formation of surface microphases that protect strontium titanate from reduction},
author = {Aksenova, L A and Kostikov, Yu P and Leonov, A I and Rotenberg, B A and Strykanov, V S},
abstractNote = {The authors studied the effect of addition of strontium oxide, barium oxide, and calcium oxide on the formation of surface microphases and the reduction of strontium titanate. The materials were strontium carbonate, barium carbonate, and calcium carbonate (analytical grade) and titanium dioxide (pure grade). X-ray diffraction analysis was carried out on a DRON-2.0 diffractometer (CuK/sub ..cap alpha../, Ni filter). The surface layers were studies in an electron spectrometer by ESCA (exciting irradiation Al/sub K..cap alpha../; bond energy in standard gold sample Au/sub 4/f/sub 1/2/ = 84.1 eV; depth of layer 8 nm). Samplers were prepared according to the usual ceramic technology. It was found that protection from reduction of strontium titanate that is doped with calcium, strontium, or barium oxide is related to the formation of surface microphases that are close to M/sub 2/TiO/sub 4/ in composition and do not undergo reduction when calcined in a medium at low partial pressure of oxygen.},
doi = {},
url = {https://www.osti.gov/biblio/6198223}, journal = {J. Appl. Chem. USSR (Engl. Transl.); (United States)},
number = ,
volume = 59:2,
place = {United States},
year = {Wed Aug 20 00:00:00 EDT 1986},
month = {Wed Aug 20 00:00:00 EDT 1986}
}