Synthesis and electrical properties of Ba2Nb5-xZrxO9

Kouta Iwasaki, Hirotsugu Takizawa, Kyota Uheda, Tadashi Endo, Masahiko Shimada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The Ba2Nb5-xZrxO9 solid solution was first synthesized by the solid state reaction, and Zr proved to be substituted selectively for Nb in the preferred site of Ba2Nb5O9. The structure of Ba2Nb5-xZrxO9 consists of a NbO layer sandwiched by two Ba(Nb, Zr)O3 perovskite blocks. The limit of Zr-substitution was estimated to be x = 1.0, according to the change of c axis parameter against x. SEM observation showed that platy agglomerates preferred the orientation of the 00l plane, and the particle size was reduced by up to 1/10 on the addition of Zr. The solid solution showed a metallic conductivity with a temperature independent magnetic susceptibility. Substitution of Zr for Nb appeared to cause a change in electron density as a result of contraction of the Nb(2)-O(3) distance, leading to the increase of electrical resistivity.

Original languageEnglish
Pages (from-to)109-114
Number of pages6
JournalJournal of Alloys and Compounds
Volume308
Issue number1-2
DOIs
Publication statusPublished - 2000 Aug 10

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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