Phase transitions in solid solutions based on lanthanum chromite

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Inorg. Mater. (Engl. Transl.); (United States)

OSTI ID:7008511

Tolochko, S P; Kononyuk, I F; Lyutsko, V A; Zonov, Yu G

In this work we determined the existence of phase transformation in the solid solutions La/sub 1-x/Ca/sub x/CrO/sub 3/, LaCo/sub y/Cr/sub 1-y/O/sub 3/, La/sub 1-x/Sr/sub x/CrO/sub 3/, and LaNi/sub y/Cr/sub 1-y/O/sub 3/ in the region 300-950/sup 0/K by means of dilatometry and calorimetry. According to the data from x-ray phase analysis, substitution of Ca/sup 2 +/ ions for La/sup 3 +/ ions leads to the formation of the solid solution La/sub 1-x/Ca/sub x/CrO/sub 3/ with x = 0.05-0.3. For x = 0.5 and 0.7 a number of additional lines, indicating a distortion of the perovskite structure and the presence of other unidentified phases, appear.

• Research Organization: V. I. Lenin Belorussian State Univ. (USSR)
• OSTI ID: 7008511
• Journal Information: Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 23:9; ISSN INOMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METALS
CALORIMETRY
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DILATOMETRY
DISPERSIONS
ELEMENTS
ELONGATION
EXPANSION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALLURGICAL EFFECTS
METALS
MIXTURES
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
STRONTIUM
TEMPERATURE DEPENDENCE
TEMPERATURE EFFECTS
THERMAL ANALYSIS
THERMAL EXPANSION
TRANSITION ELEMENT COMPOUNDS
TRIGONAL LATTICES