The formation of barium titanate ceramics by solid state reaction
The objective is to investigate the existence of secondary phases between the reactants BaO and TiO/sub 2/ during the formation of barium titanate ceramics. The reaction between BaTiO/sub 3/ and TiO/sub 2/ was studied at 1050/degree/C. This temperature was selected because it was near temperatures used in work in the literature and because, when produced for practical applications, barium titanate ceramics are often pre-reacted at 1050--1100/degree/C before being fired at temperatures greater than 1300/degree/C. The compositions and relative amounts of phases formed as a function of time at 1050/degree/C were identified by x-ray diffraction. The method of analysis increases the sensitivity with which phases can be detected over those of past studies, but it is emphasized that absence of x-ray diffraction evidence does not prove that a phase has not formed; the phase might be present in an amount below the detection limit for that phase. 33 refs., 17 figs., 8 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6480472
- Report Number(s):
- LBL-26519; ON: DE89008167
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CERAMICS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIAGRAMS
DIFFRACTION
KINETICS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHASE TRANSFORMATIONS
REACTION INTERMEDIATES
REACTION KINETICS
SCATTERING
TITANATES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION