Phase composition, microstructure, and thermal expansion of B2O3-modified LaGaO3-based ceramics

Data are presented on the phase relations in the La2O3-SrO-Ga2O3 system and the effect of B2O3 additions on the structure and morphology of (La,Sr)(Ga,Mg)O3-δ ceramics. The formation of the perovskite phase (La,Sr)GaO3 is shown to proceed through La4SrO7 and La2SrO4 + δ. The unit-cell of (La,Sr)(Ga,Mg)O3-δ is found to vary linearly with Sr + Mg content. The introduction of boron-containing additions reduces the sintering temperature of the ceramics by up to ≃200°C. © 2001 MAIK "Nauka/Interperiodica".

Authors
Aleksandrovskii V.V.1 , Venskovskii N.U. 2 , Kaleva G.M.1 , Politova E.D.1 , Prutchenko S.G.1 , Rudnitskii L.A.1 , Stefanovich S.Yu. 1 , Khortova A.Yu. 2
Journal
Inorganic Materials
Number of issue
6
Language
English
Pages
641-646
Status
Published
Link
External link
DOI
10.1023/A:1017580703909
Volume
37
Year
2001
Organizations
  • 1 Karpov Research Institute of Physical Chemistry (Russian State Scientific Center), ul. Vorontsovo pole 10, Moscow, 103064, Russian Federation
  • 2 Russian University of Peoples' Friendship, ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
Keywords
boron derivative; gallium; lanthanum; magnesium; oxygen; perovskite; strontium; article; ceramics; chemical composition; chemical structure; temperature
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