Microspheres of the gas sensor material Cr2-xTixO3 prepared by the sol-emulsion-gel route

被引：27

作者：

Chabanis, G ^{[1
]}

Parkin, IP ^{[1
]}

Williams, DE ^{[1
]}

机构：

[1] UCL, Dept Chem, London WC1H 0AJ, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2001年 / 11卷 / 06期

关键词：

Chromium titanium oxide; Gas sensor; Sol-emulsion-gel synthesis;

D O I：

10.1039/b010049h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Chromium titanium oxide (CTO) Cr2-xTixO3 (x = 0.05 to 0.4) is the first gas-sensitive resistor material successfully to be commercialised since tin dioxide in the 1960s. Microspheres were synthesised by the sol-emulsion-gel method and characterised by X-ray diffraction, scanning electron microscopy (SEM/EDAX) and X-ray photoelectron spectroscopy (XPS). Three differently sized microspheres of size 10, 2 and 0.7 mum were synthesised. The microspheres showed minimal variation in size and good compositional homogeneity. The CTO powders fired at 1000 degreesC crystallised as single phases for Cr1.95Ti0.05O3, Cr1.9Ti0.1O3 and Cr1.8Ti0.2O3. For x > 0.2 the formation of a secondary CrTiO3 phase was noted. EDAX and XPS measurements revealed the absence of impurities and a surface segregation of the Ti atoms.

引用

收藏

页码：1651 / 1655

页数：5

相关论文

共 27 条

[1] TITANIA AND ALUMINA CERAMIC MEMBRANES [J].

ANDERSON, MA ;

GIESELMANN, MJ ;

XU, QY .

JOURNAL OF MEMBRANE SCIENCE, 1988, 39 (03) :243-258

[2] Grain size effects on H-2 gas sensitivity of thick film resistor using SnO2 nanoparticles [J].

Ansari, SG ;

Boroojerdian, P ;

Sainkar, SR ;

Karekar, RN ;

Aiyer, RC ;

Kulkarni, SK .

THIN SOLID FILMS, 1997, 295 (1-2) :271-276

[3] The structure of multicomponent (titania/zirconia) nanoparticles [J].

Bartlett, JR ;

Gazeau, D ;

Zemb, T ;

Woolfrey, JL .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 1998, 13 (1-3) :113-118

[4] Sol gel preparation, structure and thermal stability of crystalline zirconium titanate microspheres [J].

Bhattacharya, AK ;

Mallick, KK ;

Hartridge, A ;

Woodhead, JL .

JOURNAL OF MATERIALS SCIENCE, 1996, 31 (01) :267-271

[5]

Bhattacharya AK, 1996, J MATER SCI LETT, V15, P1842, DOI 10.1007/BF00264072

[6] PREPARATION AND CHARACTERIZATION OF LN(2)ZR(2)O(7) MICROSPHERES BY AN INORGANIC SOL-GEL ROUTE [J].

BHATTACHARYA, AK ;

HARTRIDGE, A ;

MALLICK, KK ;

WOODHEAD, JL .

JOURNAL OF MATERIALS SCIENCE, 1994, 29 (23) :6076-6078

[7] MORPHOLOGY OF SNO2 THIN-FILMS OBTAINED BY THE SOL-GEL TECHNIQUE [J].

CHATELON, JP ;

TERRIER, C ;

BERNSTEIN, E ;

BERJOAN, R ;

ROGER, JA .

THIN SOLID FILMS, 1994, 247 (02) :162-168

[8] Chromia microspheres by the sol-gel technique [J].

Chatterjee, M ;

Siladitya, B ;

Ganguli, D .

MATERIALS LETTERS, 1995, 25 (5-6) :261-263

[9] THERMAL BARRIER COATINGS FROM SOL GEL-DERIVED SPRAY-GRADE Y2O3-ZRO2 MICROSPHERES [J].

CHATTERJEE, M ;

RAY, J ;

CHATTERJEE, A ;

GANGULI, D ;

JOSHI, SV ;

SRIVASTAVA, MP .

JOURNAL OF MATERIALS SCIENCE, 1993, 28 (10) :2803-2807

[10] Role of organic solvents and surface-active agents in the sol-emulsion-gel synthesis of spherical alumina powders [J].

Chatterjee, M ;

Naskar, MK ;

Siladitya, B ;

Ganguli, D .

JOURNAL OF MATERIALS RESEARCH, 2000, 15 (01) :176-185