Preparation of a continuous series of solid solutions in the Ta2O5Nb2O5 system

M. Zafrir*, A. Aladjem, R. Zilber, L. Ben-Dor

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A continuous series of Ta2O5Nb2O5 solid solutions was obtained by anodically dissolving calculated amounts of tantalum and niobium in a saturated solution of NH4Cl in methanol (at room temperature), evaporation of the solvent, and thermal decomposition of the product at temperatures not exceeding 750-800°C. X-ray diffraction analysis showed that at all Ta:Nb ratios the product was isomorphic with β-Ta2O5 (γ-Nb2O5); all reflections could be indexed in an orthorhombic cell, with a increasing linearly from 6.170 to 6.192 Å and c decreasing linearly from 3.935 to 3.885 Å as Ta was substituted for Nb. The changes in parameter b as a function of composition were less pronounced and its values were between 3.657 and 3.662 Å. The method may be used for the preparation of various mixed oxides that are difficult to prepare by other techniques.

Original languageEnglish
Pages (from-to)377-380
Number of pages4
JournalJournal of Solid State Chemistry
Volume18
Issue number4
DOIs
StatePublished - Aug 1976

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