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SECTION E: PROCESSING, STRUCTURE & PROPERTIES

Preparation and Characterization of Low Temperature Sintered Alumina by CuO-TiO2-Nb2O5-Ag2O Additives

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Pages 189-196 | Received 03 Sep 2006, Accepted 11 Sep 2006, Published online: 10 Oct 2011
 

Abstract

For the purpose of enabling the low-temperature sintering of alumina, the addition of Ag 2 O to CuO-TiO 2 -Nb 2 O 5 type sintering additive was examined. The use of CuO-TiO 2 -Nb 2 O 5 -Ag 2 O type sintering additive by 5 wt% enabled the low-temperature sintering of alumina at 860°C. It is presumed that the formation of Cu 4 TiNb 4 O x solid solution has an important role for low temperature sintering of alumina. The obtained sintered material showed high thermal conductivity of 18 W/mK, higher than that of conventional LTCC materials, and that the material could be co-fired with silver electrodes.

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