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Title: Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions

Abstract

The objective of this work was to study phase equilibria in the systems HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in the 0 to 50 mole% SrO or BaO range and between 1600 and 2800/sup 0/C with the aid of high-temperature calcining and quenching methods. The samples' phase composition was determined by x-ray, microstructural, and petrographic methods. Samples calcined and melted in the solar furnace were analyzed by x-ray diffraction at room temperature on a DRON-1.5 diffractometer with Cu-K/sub ..cap alpha../ radiation and a Ni filter. Refractive indices were measured in high-refraction immersion liquids and in sulfur and selenium alloys. They form characteristic narrow solid solution regions based on the monoclinic, tetragonal, and cubic modifications of HfO/sub 2/(ZrO/sub 2/).

Authors:
; ; ;
Publication Date:
OSTI Identifier:
7192622
Resource Type:
Journal Article
Journal Name:
Inorg. Mater. (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 23:9; Other Information: Translated from Izv. Akad. Nauk SSSR, Neorg. Mater.; 23: No. 9, 1495-1499(Sep 1987)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; PHASE STUDIES; HAFNIUM OXIDES; STRONTIUM OXIDES; ZIRCONIUM OXIDES; CALCINATION; CUBIC LATTICES; DIFFERENTIAL THERMAL ANALYSIS; EQUILIBRIUM; MELTING; MICROSTRUCTURE; MONOCLINIC LATTICES; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; QUANTITY RATIO; SOLAR HEATING; TETRAGONAL LATTICES; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DECOMPOSITION; DIAGRAMS; DIFFRACTION; HAFNIUM COMPOUNDS; HEATING; OXIDES; OXYGEN COMPOUNDS; PYROLYSIS; REFRACTORY METAL COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; THERMAL ANALYSIS; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies

Citation Formats

Shevchenko, A V, Lopato, L M, Gerasimyuk, G I, and Zaitseva, Z A. Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions. United States: N. p., 1988. Web.
Shevchenko, A V, Lopato, L M, Gerasimyuk, G I, & Zaitseva, Z A. Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions. United States.
Shevchenko, A V, Lopato, L M, Gerasimyuk, G I, and Zaitseva, Z A. Mon . "Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions". United States.
@article{osti_7192622,
title = {Reactions in the system HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in high HfO/sub 2/ or ZrO/sub 2/ regions},
author = {Shevchenko, A V and Lopato, L M and Gerasimyuk, G I and Zaitseva, Z A},
abstractNote = {The objective of this work was to study phase equilibria in the systems HfO/sub 2/-SrO, HfO/sub 2/-BaO, and ZrO/sub 2/-BaO in the 0 to 50 mole% SrO or BaO range and between 1600 and 2800/sup 0/C with the aid of high-temperature calcining and quenching methods. The samples' phase composition was determined by x-ray, microstructural, and petrographic methods. Samples calcined and melted in the solar furnace were analyzed by x-ray diffraction at room temperature on a DRON-1.5 diffractometer with Cu-K/sub ..cap alpha../ radiation and a Ni filter. Refractive indices were measured in high-refraction immersion liquids and in sulfur and selenium alloys. They form characteristic narrow solid solution regions based on the monoclinic, tetragonal, and cubic modifications of HfO/sub 2/(ZrO/sub 2/).},
doi = {},
journal = {Inorg. Mater. (Engl. Transl.); (United States)},
number = ,
volume = 23:9,
place = {United States},
year = {1988},
month = {2}
}