A Study on the Alumina Ceramic Casting Conditions by the Doctor-Blade Method and Their Effect on the Properties of Green Tape (Part 2)

DOI Web Site Web Site

Bibliographic Information

Other Title
  • アルミナセラミックスのドクターブレード方式によるキャスティング条件とそれが成形体に及ぼす影響の研究 (第2報)
  • アルミナ セラミックス ノ ドクター ブレード ホウシキ ニ ヨル キャスティ

Search this article

Abstract

The thickness accuracy in alumina ceramic green tapes made by the doctor-blade method has been improved the experiment and calculated simulation. A minimized thickness dispersion in the green tape using the one-blade construction method was derived. In this study, the thickness accuracy of the green tape made by a two-doctor-blade construction method was examined. Calculated simulation was undertaken to correlate with the experimental results. The two-blade construction method improved the unifomity in thickness. In the 1st report, the parameter of the slurry reservoir level (HR) has been the parameter responsible for the unifomity in thickness. Simulation of the two-blade construction method was derived as follows that HR shared smaller.<br>H=l2/l1⋅h13/h23⋅HR+6μl2/ρgh23⋅V0(h1-h2)<br>Where, HR is 1st reservoir level, H is 2nd one, l1 and l2 are 1st and 2nd blade thickness, h1 and h2 are 1st and 2nd blade clearance respectively, and V0 is carrier transfer speed. When the 2nd term in the right hand of the eqution was made large, the effect of HR could be made small. Consequently, the thickness accuracy was improved. In the experimental observation, 2nd reservoir slurry was drifted to the 2nd blade side by the transfered carrier tape. The apparent reservoir level (H) near the 2nd blade side became higher than that of mean value. The level was made the shape as sloped down to the 1st level. This sloped level had a dumping effect by shifted to foward and back. Subsequently, the apparent reservoir level (H) was kept constant. It improved to the thickness accuracy.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top