(中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 對供給態(tài)和研磨態(tài)超細(xì)鎢粉的顆粒粒度進(jìn)行了表征。將供給態(tài)粉和研磨態(tài)粉由激光衍射法、FSSS法和BET法測量出顆粒粒度。結(jié)果表明：利用激光衍射法和FSSS法所測量出來的供給態(tài)粉和研磨態(tài)粉的粒度結(jié)果是錯誤的，這是因為測量系統(tǒng)的缺陷和測量原理的不合適導(dǎo)致的。可以使用吸附等溫線來獲得表面粗糙度的分?jǐn)?shù)維維數(shù)D和微孔的表 面積St，且用D和St來修正dBET的計算公式。使用修正公式得到的4種粉末的平均粒度值與掃描電鏡的觀測值相一致。
關(guān)鍵字: 超細(xì)鎢粉；顆粒粒度表征；粒度計算公式
of ultrafine tungsten powder
（State Key Laboratory for Powder Metallurgy,
Central South University，Changsha 410083，China）
Abstract:The particle size measurement of as-supplied and lab-milled ultrafine tungsten powders were investigated. FSSS method, laser diffraction method and BET method were used to perform the particle size measurement. Results show that the mean particle size values obtained from the above mentioned methods for as-supplied and lab-milled powders were misleading because of the defects of the measurement system or unsuitability of measurement theory. The fractal dimension of surface roughness and external surface area of pores obtained from adsorption isotherms were used to modify dBET calculation formula. By the modified formula，the calculated particle size values of four powders were in good agreement with the SEM sizes.
Key words: ultrafine tungsten powder; particle size measurement investigation; particle size calculation formula
