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Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

THERMAL PLASMA TECHNIQUE FOR PRODUCTION OF DOPED LANTHANUM CHROMITE POWDERS FOR SEMICONDUCTING REFRACTORY CERAMICS

A. V. Gorbunov
Plasma Physics and Chemistry Laboratory, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, Minsk, Belarus

A. L. Mosse
Plasma Physics and Chemistry Laboratory, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, P.Brovka str. 15, 220072, Minsk, Belarus

A. Marotta
Institute of Physics, University of Campinas, UNICAMP, SP, Brazil

A. N. Knak
Institute of Heat and Mass Transfer of National Academy of Sciences of Belarus, P.Brovka str. 15, 220072, Minsk, Belarus

Abstract

In this paper the technique for production of calcia and alumina doped lanthanum chromite powders using nitrate solution injection plasma synthesis in triple torch reactor was examined. The oxide powder synthesized were characterised with sedimentation analysis, thermogravimetry, XRD, EDXRA, TEM, microprobe analysis. Resulting La-Ca-Al-Cr-O-ceramics in p-type semiconducting with electrical conductivity near 2000 Ohm−1 m−1 at 1100 K and contains the orthorhombic perovskite phase.