Hydrothermal synthesis of KTi2(PO4)3, α-Ti(HPO4)2•H2O and γ-Ti(PO4)(H2PO4)•2H2O from a lepidocrocite-type titanate

被引：3

作者：

Kumada, Nobuhiro ^{[1
]}

Imase, Akihito ^{[1
]}

Yanagida, Sayaka ^{[1
]}

Takei, Takahiro ^{[1
]}

Miura, Akira ^{[2
]}

Itoi, Nobuki ^{[2
]}

Goto, Toshiki ^{[3
]}

机构：

[1] Univ Yamanashi, Ctr Crystal Sci & Technol, Miyamae Cho 7-32, Kofu, Yamanashi 4008511, Japan

[2] Hokkaido Univ, Fac Engn, Sapporo, Hokkaido, Japan

[3] Ohtsuka Chem Co Ltd, Tokyo, Japan

来源：

JOURNAL OF ASIAN CERAMIC SOCIETIES | 2019年 / 7卷 / 03期

基金：

日本学术振兴会;

关键词：

A; oxide; B; solvothermal; C; X-ray diffraction; D; Thermal expansion; NEUTRON POWDER DIFFRACTION; CRYSTAL-STRUCTURE; TITANIUM PHOSPHATE; ZIRCONIUM-PHOSPHATES; NONAQUEOUS SYNTHESIS; BISMUTH CHROMATE; OXIDES; EXPANSION; LITHIUM; BI5+;

D O I：

10.1080/21870764.2019.1649041

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A potassium titanium phosphate, KTi2(PO4)(3), and two types of hydrated titanium phosphates, alpha-Ti(HPO4)(2)H2O and gamma-Ti(PO4)(H2PO4)2H(2)O, were prepared by hydrothermal reaction using a layered lepidocrocite-type titanate as a starting compound. When layered lepidocrocite-type K-0.7(Li,Ti)(2)O-4 (Lss; Ohtsuka Chemical Co., Ltd.) was used at a reaction temperature of 180 degrees C, KTi2(PO4)(3) was obtained. The crystal structure of KTi2(PO4)(3) was a NASICON-like rhombohedral one with a low thermal expansion coefficient. The thermal expansion coefficient of KTi2(PO4)(3) was determined using synchrotron X-ray powder diffraction data (SRXD), and the thermal expansion coefficients for the a-axis, c-axis and unit cell volume were -2.82 x 10(-6), 7.16 x 10(-6) and 1.49 x 10(-6) K-1, respectively. Two types of layered titanium phosphates, alpha-Ti(HPO4)(2)H2O and gamma-Ti(PO4)(H2PO4)2H(2)O, were prepared by hydrothermal reaction using protonated titanate (Lss-H) derived from lepidocrocite-type potassium titanate (Lss) by the ion-exchange reaction.

引用

页码：361 / 367

页数：7

共 46 条

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