Synthesis of oxynitride perovskites (AZr[sub x]Ta[sub 1[minus]x]O[sub 2+x]N[sub 1[minus]x], A = Ca, Sr, Ba and 0 [le] x [le] 1)

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Materials Research Bulletin; (United States)

DOI:https://doi.org/10.1016/0025-5408(94)90206-2· OSTI ID:7175038

Grins, J; Svensson, G ^[1]

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1. Stockholm Univ. (Sweden). Dept. of Inorganic Chemistry

Solid solution perovskite phases AZr[sub x]Ta[sub 1[minus]x]O[sub 2+x]N[sub 1[minus]X], with A = Ca, Sr, Ba and 0 [le] x [le] 1 have been synthesized by ammonolysis of mixtures of Ta-Zr gels and ACO[sub 3]. The gels were made by the sol-gel technique using TaCl[sub 5] and Zr-n-propoxide as precursors. The perovskite phases have been characterized by X-ray powder diffraction and elemental analysis for one composition from each subsystem has been performed. The Ca compounds were found to be orthorhombic for all x. The orthorhombic GdFeO[sub 3] type perovskite structure was verified for the composition CaZr[sub 0.52]Ta[sub 0.48]O[sub 2.52]N[sub 0.48]by a Rietveld refinement to R[sub F] = 2.3%, using CuK[alpha][sub 1] X-ray powder diffractometer data. According to X-ray powder diffraction data, the Sr compounds are orthorhombic for x [le] 0.60 and cubic for lower x values. The Ba compounds were found to be cubic for all x.

• OSTI ID: 7175038
• Journal Information: Materials Research Bulletin; (United States), Journal Name: Materials Research Bulletin; (United States) Vol. 29:7; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
NITRIDES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE STUDIES
PNICTIDES
REFRACTORY METAL COMPOUNDS
SCATTERING
STRONTIUM COMPOUNDS
SYNTHESIS
TANTALATES
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONATES
ZIRCONIUM COMPOUNDS