Title:
【発明の名称】ベータアルミナ電解質
Document Type and Number:
Japanese Patent JP3009566
Kind Code:
B2
Abstract:
PURPOSE:To suppress variation of sintered body characteristics due to difference in production method, alumina material, and sintering conditions easily and without causing any problem on handling of material, toxicity, and characteristics, industrially by specifying the composition of beta alumina. CONSTITUTION:The mole ratio of Al2O3/Na2O on aluminum oxide, sodium oxide, and lithium oxide that are the oxides to form beta alumina is set at 6 to 7. Also the weight ratio of it to the whole amount of Li2O as crystal stabilizing agent is set to 0.5 to 0.75wt.%. By specifying the composition of the beta alumina like this, an electrolyte with microstructure of which conductivity is not lowered and grains are not grown is obtained. Therefore the durability of a battery can be increased without reducing the output of the battery. Also, becuase the production conditions or sintering conditions affect less on the characteristics, the characteristics do not vary even if a slight difference is produced in the sintering temperature or sintering time, and thus a product stable in quality in industrial production can be provided.
Inventors:
Toshiro Nishi
Hirokazu Yamamoto
Masakazu Miyachi
Yasuhiko Suiryu
Hirokazu Yamamoto
Masakazu Miyachi
Yasuhiko Suiryu
Application Number:
JP21566193A
Publication Date:
February 14, 2000
Filing Date:
August 31, 1993
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
C04B35/113; H01M10/39; (IPC1-7): H01M10/39; C04B35/113
Domestic Patent References:
| JP54862A | ||||
| JP5330614A | ||||
| JP214873A | ||||
| JP5105504A | ||||
| JP5186260A |
Attorney, Agent or Firm:
Akira Uchida (2 outside)