Title:
HEAT RESISTANT PLATINUM AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP2001049365
Kind Code:
A
Abstract:
To provide heat resistant platinum excellent in high temp. characteristics.
At the time of producing heat resistant platinum contg. 101 to 450 ppm calcium and 0 to 200 ppm zirconium, and the balance inevitable impurities, in a nonoxidizing atmosphere, calcium is added to platinum including inevitable impurities, while dissolution is executed, dissolved oxygen in platinum is converted into calcium oxide to floatingly remove dissolved oxygen, thereafter, platinum is mixed with calcium and zirconium, and they are uniformly dissolved. The heat resistant platinum in which high temp. characteristics are attained from the synergism by the addition of calcium and zirconium and suitable for crucibles, apparatus or the like can be obtd.
Inventors:
ISHII NOBUO
HORIKAWA TAKASHI
NASU TAKAYOSHI
HORIKAWA TAKASHI
NASU TAKAYOSHI
Application Number:
JP22208999A
Publication Date:
February 20, 2001
Filing Date:
August 05, 1999
Export Citation:
Assignee:
ISHIFUKU METAL IND
International Classes:
C22B9/10; C22C1/02; C22C5/04; (IPC1-7): C22C5/04; C22B9/10; C22C1/02
Attorney, Agent or Firm:
Tomita Koharu
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