Measurement of Mean Particle Size of Tungsten and Tungsten Carbide Powders by Fisher Sub-Sieve Sizer not Dependent on Porosity

Tadaaki Aoyama

doi:10.2497/jjspm.17.161

気孔率に依存しないFisher Sub-Sieve Sizer法によるタングステン,炭化タングステン粉末の平均粒子径測定

青山忠明

著者情報

ジャーナルフリー

1970 年 17 巻 4 号 p. 161-167

DOI https://doi.org/10.2497/jjspm.17.161

詳細

発行日: 1970/11/25 受付日: 1970/07/07 J-STAGE公開日: 2009/05/22 受理日: - 早期公開日: - 改訂日: -
訂正情報
訂正日: 2009/05/22 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : An equation for the specific surface area of powder, not dependent on the porosity for F-SSS, has been derived from the Kozeny-Carman formula.:
S_x=K_x/ρ_p(x-ε)√h₁-h₂/h₂√ε³/L
Using the equation, measurements of mean particle size of tungsten and tungsten carbide powders, was determined at different packing methods, sample weights and porosities.
Results obtained are as follows:
(1) The equation applied, to tungsten powder, but not satisfactorily to tungsten carbide powder since the catter possilily has an unstable packing structure.
(2) The particle size was affected only slightly by the packing method, as examined by analysis of variance.
(3) The obtained correction factor x was about 0.95 for tungsten and about 1.0 for tungsten carbide powder.
Right : An equation for the specific surface area of powder, not dependent on the porosity for F-SSS, has been derived from the Kozeny-Carman formula.:
S_x=K_x/ρ_p(x-ε)√h₁-h₂/h₂√ε³/L
Using the equation, measurements of mean particle size of tungsten and tungsten carbide powders, was determined at different packing methods, sample weights and porosities.
Results obtained are as follows:
(1) The equation applied, to tungsten powder, but not satisfactorily to tungsten carbide powder since the catter possibly has an unstable packing structure.
(2) The particle size was affected only slightly by the packing method, as examined by analysis of variance.
(3) The obtained correction factor x was about 0.95 for tungsten and about 1.0 for tungsten carbide powder.

訂正日: 2009/05/22 訂正理由: - 訂正箇所: 引用文献情報訂正内容: 訂正前 : 3) 西山厚,石田隆一:材料試験 4 (1955), 587-593
4) 奥田欽之助:サブ・シーブ・サィザーの精度について(第2報),昭和35年5月(社内報告)
5) 本間栄五郎:粉体工学研究会誌6(1969), 107-114
6) セメント協会編:日本工業規格JISセメント解説 29 (1938), 106
7) 久保輝一郎ら:"粉体"p.165,丸善 (1962)
11) 荒川正文:粉体工学研究会誌 6 (1969), 31

訂正後 : 3) 西山厚,石田隆一:材料試験 4 (1955), 587-593
4) 奥田欽之助:サブ・シーブ・サイザーの精度について(第2報),昭和35年5月(社内報告)
5) 本間栄五郎:粉体工学研究会誌6(1969), 107-114
6) セメント協会編:日本工業規格JISセメント解説 29 (1938), 106
7) 久保輝一郎ら:“粉体”p.165,丸善 (1962)
11) 荒川正文:粉体工学研究会誌 6 (1969), 31

訂正日: 2009/05/22 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

An equation for the specific surface area of powder, not dependent on the porosity for F-SSS, has been derived from the Kozeny-Carman formula.:
S_x=K_x/ρ_p(x-ε)√h₁-h₂/h₂√ε³/L
Using the equation, measurements of mean particle size of tungsten and tungsten carbide powders, was determined at different packing methods, sample weights and porosities.
Results obtained are as follows:
(1) The equation applied, to tungsten powder, but not satisfactorily to tungsten carbide powder since the catter possibly has an unstable packing structure.
(2) The particle size was affected only slightly by the packing method, as examined by analysis of variance.
(3) The obtained correction factor x was about 0.95 for tungsten and about 1.0 for tungsten carbide powder.

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