Title:
モリブデン坩堝
Document Type and Number:
Japanese Patent JP6827461
Kind Code:
B2
Abstract:
The molybdenum crucible includes a cylindrical side wall and a bottom provided integrally with one end of the side wall. The side wall includes a coarse grain region configured to extend from an outer wall toward an inner wall and a fine grain region configured to extend from the inner wall toward the outer wall so as to be in contact with the coarse grain region. The ratio of the coarse grain region in the side wall in the thickness direction thereof is 10% or more and less than 90%. The coarse grain region is defined as such a region in which crystal grains having a grain size of 1 mm or more determined by an intercept method in the height direction of the crucible occupy 95% or more of an area of a measurement region.
Inventors:
Shin Watanabe
Yoshitake Fukaya
Masahiro Kato
Nishino Shigetsune
Yoshitake Fukaya
Masahiro Kato
Nishino Shigetsune
Application Number:
JP2018501754A
Publication Date:
February 10, 2021
Filing Date:
February 23, 2017
Export Citation:
Assignee:
Allied Material Co., Ltd.
International Classes:
F27B14/10
Domestic Patent References:
| JP9196570A | ||||
| JP2010270345A | ||||
| JP2013060348A | ||||
| JP7278767A |
Attorney, Agent or Firm:
Kenho Ikeda
Kazuo Okada
Takashi Sasaki
Kazuo Okada
Takashi Sasaki