ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Dense Mullite/Al2O3 ceramics with a thermal conductivity of 45 W/m.K were obtained atthe sintering temperature of 1500°C using Li2O, CaO and Y2O3 as additives. At temperature below1500°C, the shrinkage of Mullite/Al2O3 ceramics is promoted by liquid LiAlSi2O6 and Al2Y4O9.Liquid LiAlSi2O6 mainly improves the densification of the sample when the sintering temperatureincreases to 1500°C. The formation of liquid phase at a relatively low temperature results inhomogeneous Al2Y4O9 and Ca(Al2Si2O8) distributed around the Mullite/Al2O3 particles, whichbenefits the thermal conductivity improved
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.129.pdf