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Title:
ZIRCONIUM DIOXIDE POWDER, ITS PRODUCTION AND METHOD FOR USING THE SAME IN PRODUCTION OF SINTERED ARTICLE
Document Type and Number:
Japanese Patent JPH0312322
Kind Code:
A
Abstract:

PURPOSE: To easily obtain zirconium dioxide advantageously in terms of a cost by melting zirconyl chloride in the presence of a specific diol and calcining the reaction product at an elevated temp. in an oxygen-containing gaseous atmosphere.

CONSTITUTION: The objective zirconium dioxide powder is obtd. by. melting the zirconyl chloride in the presence of the diol expressed by HO-X-OH (X is 2-5C satd. hydrocarbon residue) to evaporate water and hydrogen chloride, calcining the reaction product at the elevated temp. in the oxygen-containing gaseous atmosphere and pulverizing the calcined residue in some cases. The representative diols to be used include ethane-1,2-diol; propane-1,2-diol, etc. The resulted zirconium dioxide powder has the size of about 10 to 60 nm crystals depending on the conditions for production and generally has a gentle flocculation state having a bimodal pore distribution. The powder is well press formed, by which the highdensity greenware having the mechanical and thermal stability of the desired extent is obtd.


Inventors:
HERUMUUTO SHIYARUFU
Application Number:
JP14015490A
Publication Date:
January 21, 1991
Filing Date:
May 31, 1990
Export Citation:
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Assignee:
HUELS CHEMISCHE WERKE AG
International Classes:
C01G25/02; C04B35/48; (IPC1-7): C01G25/02; C04B35/48
Attorney, Agent or Firm:
Mitsuyoshi Ezaki (1 person outside)