Premium
Gelcasting and Pressureless Sintering of Translucent Alumina Ceramics
Author(s) -
Mao Xiaojian,
Shimai Shunzo,
Dong Manjiang,
Wang Shiwei
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02328.x
Subject(s) - materials science , sintering , ceramic , calcination , microstructure , composite material , homogeneous , green body , pressureless sintering , suspension (topology) , ball mill , chemistry , physics , mathematics , homotopy , pure mathematics , thermodynamics , catalysis , biochemistry
Gelcasting is a very useful technique for producing ceramic parts with complex shapes. In this work, gelcasting in air and pressureless sintering in hydrogen were applied to manufacture translucent alumina ceramics. A stable suspension with 75 wt% solids was prepared by ball milling. Trapped bubbles were removed completely before casting to obtain homogeneous green bodies. Final sintering was carried out in a hydrogen furnace at 1850°C for 3 h. Homogeneous microstructures of both calcined and sintered bodies were obtained. The in‐line transmission of the sample with a thickness of 0.5 mm increased gently from 9% to 10% in the wavelength range of 190–1100 nm.