Effect of calcium hydroxide on slip casting behaviour

Şakar-Deliormanli A. M., Yayla Z.

Applied Clay Science, cilt.24, sa.3-4, ss.237-243, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 24 Sayı: 3-4
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.clay.2003.04.001
  • Dergi Adı: Applied Clay Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.237-243
  • Anahtar Kelimeler: slip casting, clays, electrolytes, ceramic processing
  • Manisa Celal Bayar Üniversitesi Adresli: Hayır

Özet

The effect of calcium hydroxide addition on the casting performance of ceramic slips for sanitary ware was studied. Powder composed of feldspar (24 wt.%), quartz (24 wt.%), kaolin (35 wt.%) and ball clay (17 wt.%) was mixed with water to contain 65 wt.% of solids (specific density 1800 g/l). Either Ca(OH)2 or Na2CO3 was added at concentrations ranging between 0.060 and 0.085 wt.% and the slurries were dispersed by the optimum addition of sodium silicate. Calcium hydroxide in presence of sodium silicate improved the casting behavior of the slips, lowering the viscosity, and water absorption, increasing bending strength and cake thickness, as compared to the addition of sodium carbonate. © 2003 Elsevier B.V. All rights reserved.