Influence of growth conditions on the optical, electrical resistivity and piezoelectric properties of Ca₃TaGa₃Si₂O₁₄ single crystals

• FU Xiuwei

  National Institute for Materials Science Graduate School of Advanced Science and Engineering, Waseda University

• VÍLLORA Encarnación G.

  National Institute for Materials Science

• MATSUSHITA Yoshitaka

  National Institute for Materials Science

• KITANAKA Yuuki

  Department of Applied Chemistry, The University of Tokyo

• NOGUCHI Yuji

  Department of Applied Chemistry, The University of Tokyo

• MIYAYAMA Masaru

  Department of Applied Chemistry, The University of Tokyo

• SHIMAMURA Kiyoshi

  National Institute for Materials Science Graduate School of Advanced Science and Engineering, Waseda University

• OHASHI Naoki

  National Institute for Materials Science Materials Research Center for Element Strategy, Tokyo Institute of Technology

Abstract

Piezoelectric Ca₃TaGa₃Si₂O₁₄ (CTGS) single crystals are grown by the Czochralski technique and investigated in detail for high temperature sensor applications. The influence of the oxygen partial pressure during the growth on material properties is investigated by the use of Ir crucibles, as well as Pt ones. Colorless crystals are obtained, indicating that the typical yellowish coloration of CTGS crystals is related with the use of Ir-crucibles. Colored crystals present three absorption bands at 340, 450 and 1790 nm, however, related crystal defects do not affect the electrical properties of grown crystals. Dielectric and piezoelectric properties do not vary significantly with the growth conditions. Instead, it is found that the electrical resistivity depends on the oxygen partial pressure and it is higher for CTGS crystals grown under oxygen-less atmosphere.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 124 (5), 523-527, 2016

  The Ceramic Society of Japan

Keywords

• Langasite
• Pt crucible
• Piezoelectric materials
• High temperature sensors

Details

• CRID: 1390282680264508288
• NII Article ID: 130005149949
• DOI: 10.2109/jcersj2.15293
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/124/5/124_15293/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed