Structural Phase Transition and Microstructures of Li<sub>2</sub>CoSiO<sub>4</sub>
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- Nakayama Noriaki
- Graduate School of Science and Engineering, Yamaguchi University
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- Itoyama Takanobu
- Graduate School of Science and Engineering, Yamaguchi University
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- Suemoto Kentaro
- Graduate School of Science and Engineering, Yamaguchi University
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- Fujiwara Keiko
- Graduate School of Science and Engineering, Yamaguchi University
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- Nakatsuka Akihiko
- Graduate School of Science and Engineering, Yamaguchi University
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- Isobe Masahiko
- Institute for Solid State Physics, University of Tokyo
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- Ueda Yutaka
- Institute for Solid State Physics, University of Tokyo
抄録
The orthorhombic Pbn21 phase of Li2CoSiO4 has been prepared by solid state reaction of Li2CO3, CoC2O4・2H2O, and highly dispersed SiO2 at 900 °C and the subsequent slow cooling in Ar gas stream. The DTA curve shows peaks at around 540 °C indicating a reversible structural phase transition. XRD pattern of the sample quenched from 650 °C can be indexed as a Pmn21 phase. However, electron diffraction patterns show complex diffuse scatterings. From the in-situ XRD patterns at high temperature, a reversible second order-type phase transition from Pbn21 to Pmn21 phase was confirmed and it is interpreted as an order-disorder transition of Co and Li atoms. At high temperature, Pmn21 phase transforms to the monoclinic γ-phase with large thermal hysteresis; DTA curve shows peaks at 950°C on heating and at 780°C on cooling.
収録刊行物
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- Transactions of the Materials Research Society of Japan
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Transactions of the Materials Research Society of Japan 36 (3), 437-440, 2011
一般社団法人 日本MRS
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詳細情報 詳細情報について
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- CRID
- 1390282680489457920
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- NII論文ID
- 130003398992
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- COI
- 1:CAS:528:DC%2BC3MXhtl2iur3E
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- ISSN
- 21881650
- 13823469
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可
