乾燥調節剤を用いた超微粒子アルミナケーキの乾燥の動力学

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概要

• 論文の詳細を見る

• The drying kinetics of the wet alumina pieces prepared by pressure filtration of ultrafine(average size 0.16 μm)alumina powder in various dispersion conditions were studied. The effcts of acidic dispersant and two drying control chemicals(DCC)were investigated by studying the change of contact angle, surface potential, green properties and drying kinetics. By appropriately controlling temperature and humidity, the drying kinetics can be divided into two stages, starting from an interfacial evaporation, then ending with a vapor diffusion through a porous matrix. The drying rate of the initial stage of the drying process is linearly dependent upon drying time, which will then change to a parabolic decrease behavior controlled by a diffusion-limited mechanism. These kinetic phenomena can be described by three parameters, including mass loss rate, J, mass transport coefficient, k, and diffusion coefficient, D. In association with the analysis of these kinetic parameters, the effects of drying with the change of temperature and relative humidity will be clarified. The results show that the kinetics is greatly improved and the drying can be reduced to only one step.

• 社団法人日本セラミックス協会の論文
• 1999-04-01

著者

• Wei W‐c

  Institute Of Materials Science And Engineering National Taiwan University

• Hsieh C‐l

  Institute Of Materials Science And Engineering National Taiwan University

• Wei Wen-cheng

  Institute Of Materials Science And Engineering

• HSIEH Chang-Li

  Institute of Materials Science and Engineering, National Taiwan University

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• Microstructural Analysis of Interface Between YBa_2Cu_3O_ and Ag/Pd Alloys
• Grain Delamination of Ag-Doped YBa_2Cu_3O_ Superconductor

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