Physicochemical properties of high-temperature solutions of the systems BaO-B/sub 2/O/sub 3/-Fe/sub 2/O/sub 3/ and BaO-B/sub 2/O/sub 3/-BaF/sub 2/-Fe/sub 2/O/sub 3/ suitable for the growth of BaFe/sub 12/O/sub 19/ single crystals

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Materials Research Bulletin; (USA)

DOI:https://doi.org/10.1016/0025-5408(89)90182-7· OSTI ID:5212624

Peshev, P; Varadinov, R; Nikolov, V ^[1]

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1. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1040 Sofia (BG)

The systems BaO-B/sub 2/O/sub 3/-Fe/sub 2/O/sub 3/ and BaO-B/sub 2/O/sub 3/-BaF/sub 2/-Fe/sub 2/O/sub 3/ have been investigated and the concentration and temperature regions of stability of the Ba Fe/sub 12/O/sub 19/ phase in them are determined with a view to choosing suitable solvents and growth conditions of barium hexaferrite single crystals. The temperature dependencies of the dynamic viscosity of solutions of these systems are studied. It is shown that solutions containing BaF/sub 2/ have considerably lower viscosity values. The density and volatility of the solutions at their saturation temperatures are determined. On the basis of the data obtained, an appropriate solvent composition from the system BaO-B/sub 2/O/sub 3/-BaF/sub 2/ is proposed.

• OSTI ID: 5212624
• Journal Information: Materials Research Bulletin; (USA), Vol. 24:8; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BARIUM OXIDES
VISCOSITY
BORON OXIDES
IRON OXIDES
SOLUTIONS
STABILITY
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CRYSTAL GROWTH
HIGH TEMPERATURE
MONOCRYSTALS
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BORON COMPOUNDS
CHALCOGENIDES
CRYSTALS
DISPERSIONS
IRON COMPOUNDS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
400201 - Chemical & Physicochemical Properties