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The synthesis of a material having low thermal expansion coefficient and high electrical conductivity in the system Nb2O5-TiO2 was investigated. The average thermal expansion coefficient of Nb2TiO7 and Nb10Ti2O29 unit cells was 2.9×10-6/°C and 2.8×10-6/°C, respectively. Sintering of Nb2TiO7 was promoted by suitable calcination and by adding a metal oxide such as SrO and PbO. The high-strength and low thermal expansion polycrystalline ceramics were obtained by controlling grain growth. Addition of a metal oxide such as SrO promoted the sintering of Nb10Ti2O29. These polycrystalline ceramics showed low thermal expansions due to microcracking. Relatively high electrical conductivity was attained by reducing these sintered ceramics.

yōgyō kyōkaishi/yougyou kyoukaishi

Synthesis of Low Thermal Expansive Ceramics in the System Nb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt;-TiO&lt;sub&gt;2&lt;/sub&gt; and Electrical Conductivity of the Reduced Ceramics