Synthesis and Characterization of Ilmenite-Type Cobalt Titanate Powder

被引：32

作者：

Chuang, Shiow-Huey ^{[1
]}

Gao, Reui-Hong ^{[2
]}

Wang, Ding-Yeong ^{[3
]}

Liu, Hsiao-Ping ^{[1
]}

Chen, Li-Ming ^{[1
]}

Chiang, Michael Y. ^{[2
]}

机构：

[1] Natl Univ Kaoshiung, Dept Appl Chem, Kaohsiung 81148, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Chem, Kaohsiung 80424, Taiwan

[3] Ind Technol Res Inst, Elect & Optoelect Res Labs, Hsinchu 310, Taiwan

来源：

JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 2010年 / 57卷 / 4B期

关键词：

Cobalt titanate; CoTiO3; Sol-gel method; Spin coating; Dielectric constant; GAS-SENSING PROPERTIES; THIN-FILMS; DIELECTRICS;

D O I：

10.1002/jccs.201000129

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cobalt titanate (CoTiO3) powder was prepared by a modified sol-gel method. The precursor solution could be prepared by cobalt acetate and titanium isopropoxide using various solvents either with or without HC1. After post-heat treatment in air from 500 to 900 degrees C, CoTiO3 powder with increasing crystallinity was obtained. The fundamental properties of the powder were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analysis. The effects of post-heat treatment at different temperatures were discussed based on results of these analyses. The results showed that single-phase CoTiO3 can be prepared by straightforward sol-gel spin-coating method followed by heat treatment at fairly low temperature of 550 degrees C. The dielectric constant of the CoTiO3 powder thus prepared was found to be 34.5 by C-V analysis. High-k material application is promising for the CoTiO3 powder thus prepared.

引用

页码：932 / 937

页数：6

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