Preparation and properties of negative thermal expansion Zr2WP2O12 ceramics

Toshihiro Isobe, Takuya Umezome, Yoshikazu Kameshima, Akira Nakajima, Kiyoshi Okada

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Using solid-state reaction method, Zr2WP2O12 powder was synthesized for this study. The optimum heating condition was 1200 °C for 4 h. The obtained powder was compacted and sintered. The relative density of the Zr2WP2O12 ceramics with no sintering additive was 60%. That of samples sintered with more than 0.5 mass% MgO was about 97%. The average grain size (D50), as estimated from the polished surface of a sample sintered at 1200 °C for 4 h was about 1 μm. The obtained ceramics showed a negative thermal expansion coefficient of about -3.4 × 10-6 °C-1. Young's modulus, Poisson's ratio, three-point bending strength, Vickers microhardness, and fracture toughness of the obtained ceramics were, respectively, 74 GPa, 0.25, 113 ± 13 MPa, 4.4 GPa and 2.3 MPa m1/2.

Original languageEnglish
Pages (from-to)2045-2049
Number of pages5
JournalMaterials Research Bulletin
Volume44
Issue number11
DOIs
Publication statusPublished - Nov 1 2009
Externally publishedYes

Keywords

  • A. Ceramics
  • A. Oxides
  • B. Chemical synthesis
  • D. Mechanical properties
  • D. Thermal expansion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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