Effect of Shaping Method and Heat Treatment on Microstructure and Thermoelectric Properties of Titanium Dioxide-Reference-Cited by-同舟云学术

Effect of Shaping Method and Heat Treatment on Microstructure and Thermoelectric Properties of Titanium Dioxide

Published:2014-03 Issue: Volume:604 Page:240-244
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Rubenis Kristaps¹,Pura Agnese¹,Teteris Valdis¹,Locs Janis¹,Ozolins Jurijs¹

Affiliation:

1. Riga Technical University

Abstract

The TiO2samples were obtained by two different shaping methods: cold isostatic pressing and cold extrusion, sintered in air at 1373 K, 1573 K, 1773 K and annealed under vacuum at 1373 K. Differences in density, microstructure and thermoelectric properties were observed between the samples depending on the shaping method used. With increase in sintering temperature the electrical conductivity of all samples increased while the Seebeck coefficient decreased. Great microstructural differences were observed between the surface and bulk of the samples made by each of the shaping techniques. It was found that microstructural differences between surface and bulk of the samples affect their thermoelectric properties.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.604.240.pdf

Reference13 articles.

1. D. Kenfaui, D. Chateigner, M. Gomina, J.G. Noudem, Texture, mechanical and thermoelectric properties of Ca3Co4O9 ceramic, J. Alloys Compd. 490 [1-2] (2010) 472 – 479.

2. T. Teranishi, Y. Mori, H. Hayashi, A. Kishimoto, Thermoelectric property of polycrystalline aluminum-doped zinc oxide enhanced by micropore foaming, J. Am. Ceram. Soc. 95.

3. (2012) 690 – 695.

4. D. Zhou, Z. Zheng, S. Gong, G. Huang, Y. Hu, The influence of shaping process on microstructure and properties of BaTiO3-based chip thermistors, Ceram. Int. 32 (2006) 839 – 842.

5. Y. Liu, Y. Lin, Z. Shi, C-W. Nan, Preparation of Ca3Co4O9 and improvement of its thermoelectric properties by spark plasma sintering, J. Am. Ceram. Soc. 88.