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Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei

Journal Article:

Abstract

Single phase powder of Ca0.2Zr(0.8-x)TixOy was synthesized by replacing a part of ZrO2 in tazheranite which belongs to cubic crystal mineral of 3 constituents of CaO/ZrO2/ TiO2 with TiO2 to study the conductivity. Predetermined powder amounts of CaCO3, ZrO2 and TiO2 were respectively weighed and mixed with wet condition, the carbonate was decomposed at 1,000 centigrade, and after mixed again with wet condition, the mixture was dried and calcined again at 1,200 to 1,300 centigrade for 2 to 20 hours to get the powder. This powder was crushed and classified to make molded items by uniaxial pressing and the items were fired at 1,400 to 1,600 centigrade for 1 to 10 hours. The conductivity of sintered bodies was measured by the complex impedance method. The following results could be obtained: The targeted powder could be synthesized at the composition range of x=0.04 to 0.10 and the apparent x of single phase area was widened to 0.15 at the firing temperature of 1,500 centigrade. The activation energies of the conductivity of sintered items were 120 to 130kJ/mol, indicating that the electric conductivity was dominated by the ion conduction and was not affected by TiO2 amount, and the formed phase. The grain  More>>
Authors:
Kuramochi, H; Kobayashi, H; Mitamura, T; [1]  Mori, T; Yamamura, H [2] 
  1. Saitama University, Saitama (Japan). Faculty of Enginering
  2. Tosoh Co., Tokyo (Japan)
Publication Date:
Sep 01, 1992
Product Type:
Journal Article
Reference Number:
NEDO-92-912972; EDB-93-019585
Resource Relation:
Journal Name: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi (Journal of the Ceramic Society of Japan); (Japan); Journal Volume: 100:1165
Subject:
36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; ACTIVATION ENERGY; IONIC CONDUCTIVITY; POWDERS; CALCIUM CARBONATES; CALCIUM OXIDES; CASTINGS; SINTERING; SYNTHESIS; TITANIUM OXIDES; ZIRCONIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CHALCOGENIDES; ELECTRICAL PROPERTIES; ENERGY; FABRICATION; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360204 - Ceramics, Cermets, & Refractories- Physical Properties
OSTI ID:
7123694
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0914-5400; CODEN: NSKRE2
Submitting Site:
NEDO
Size:
Pages: 1135-1139
Announcement Date:

Journal Article:

Citation Formats

Kuramochi, H, Kobayashi, H, Mitamura, T, Mori, T, and Yamamura, H. Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei. Japan: N. p., 1992. Web.
Kuramochi, H, Kobayashi, H, Mitamura, T, Mori, T, & Yamamura, H. Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei. Japan.
Kuramochi, H, Kobayashi, H, Mitamura, T, Mori, T, and Yamamura, H. 1992. "Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei." Japan.
@misc{etde_7123694,
title = {Preparation of tazheranite powders by solid phase reaction and conductivity of sintered bodies. Kosoho ni yoru tazheranite no funmatsu gosei to dodensei}
author = {Kuramochi, H, Kobayashi, H, Mitamura, T, Mori, T, and Yamamura, H}
abstractNote = {Single phase powder of Ca0.2Zr(0.8-x)TixOy was synthesized by replacing a part of ZrO2 in tazheranite which belongs to cubic crystal mineral of 3 constituents of CaO/ZrO2/ TiO2 with TiO2 to study the conductivity. Predetermined powder amounts of CaCO3, ZrO2 and TiO2 were respectively weighed and mixed with wet condition, the carbonate was decomposed at 1,000 centigrade, and after mixed again with wet condition, the mixture was dried and calcined again at 1,200 to 1,300 centigrade for 2 to 20 hours to get the powder. This powder was crushed and classified to make molded items by uniaxial pressing and the items were fired at 1,400 to 1,600 centigrade for 1 to 10 hours. The conductivity of sintered bodies was measured by the complex impedance method. The following results could be obtained: The targeted powder could be synthesized at the composition range of x=0.04 to 0.10 and the apparent x of single phase area was widened to 0.15 at the firing temperature of 1,500 centigrade. The activation energies of the conductivity of sintered items were 120 to 130kJ/mol, indicating that the electric conductivity was dominated by the ion conduction and was not affected by TiO2 amount, and the formed phase. The grain resistance increased and the grain boundary resistance decreased with the increase of TiO2 amount. 17 refs., 9 figs.}
journal = {Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi (Journal of the Ceramic Society of Japan); (Japan)}
volume = {100:1165}
journal type = {AC}
place = {Japan}
year = {1992}
month = {Sep}
}