Journal
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
Volume 41, Issue -, Pages 437-441Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2013.05.020
Keywords
Porous; Alumina; Microstructure; Porosity; Flexural strength
Funding
- National Engineering Technology Research Center Reconstruction Project [2011FU125Z27-1]
- National Natural Science Foundation of China [51209177]
- Basic Research Fund of Northwest AF University [QN2012024]
- Dr. Scientific Start-up Funds of Northwest AF University [2011BSJJ083]
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For preparing porous alumina ceramics with desired shapes easily, a simple and low-cost technique combining cold-drying and sintering was explored. The optimal temperature for preparing the porous alumina ceramics is 1350 degrees C. The contents of CaCO3-SiO2 and dextrin in the green body have great effects on the properties of porous alumina ceramics. Due to a uniform microstructure and small pore size, the porous alumina ceramics prepared from the green body with 8 wt.% CaCO3-SiO2 show higher flexural strength and porosity. As the dextrin in the green body increases from 5 to 25 wt.%, the flexural strength decreases from 107 to 45 MPa with the porosity increasing from 36 to 54%. (C) 2013 Elsevier Ltd. All rights reserved.
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