Study on phase diagram of Ca3NbGa3Si 2O14 piezoelectric material by differential thermal analysis and X-ray diffraction measurement

Yoshisuke Futami, Yuui Yokota, Masato Sato, Kazushige Tota, Jan Pejchal, Takayuki Yanagida, Ko Onodera, Akira Yoshikawa

研究成果: Conference contribution

抄録

Ca3NbGa3Si2O14 (CNGS) is one of the langasite-type crystals and it is known as a piezoelectric material. We have successfully grown the shaped CNGS crystal using micro-pulling-down (μ-PD) method with shape control. However, the impurity phases such as Ca-Nb-O related compounds were detected in the grown crystals. The creation of the impurity phases is related to difference in stoichiometric and congruent compositions. Therefore, the detailed investigation of phase diagram on CNGS was carried out to prevent the impurity phases creation. It follows from the TG-DTA measurements that the melting point systematically changed with the Ca/Ga ratio in the Ca3-xNbGa3+xSi2O 14±δ cmpositions. The CNGS phase with Ca/Ga = 1.02 indicated the maximum melting point which suggests that the stoichiometric composition of CNGS is different in the congruent composition. Furthermore, in the DTA measurements the peaks of impurity phases were detected around 1550 °C for the CNGS sample with Ca/Ga = 1.02.

本文言語English
ホスト出版物のタイトルMaterials Integration
出版社Trans Tech Publications Ltd
ページ247-252
ページ数6
ISBN(印刷版)9783037853764
DOI
出版ステータスPublished - 2012
イベントInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
継続期間: 2011 12 12011 12 2

出版物シリーズ

名前Key Engineering Materials
508
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
CountryJapan
CitySendai
Period11/12/111/12/2

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

フィンガープリント 「Study on phase diagram of Ca<sub>3</sub>NbGa<sub>3</sub>Si <sub>2</sub>O<sub>14</sub> piezoelectric material by differential thermal analysis and X-ray diffraction measurement」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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