Effects of Bicomponent Additives on Thermal Decomposition of <TEX>$Al_2$</TEX>TiO<TEX>$_5$</TEX>

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J. Korean Ceram. Soc. > Volume 36(6); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(6): 632.

Al$_2$TiO$_5$ 열분해에 미치는 2종 첨가제의 효과

김성욱, 이형직¹, 이홍림

연세대학교 세라믹공학과
¹강릉대학교 세라믹공학과

Effects of Bicomponent Additives on Thermal Decomposition of $Al_2$TiO$_5$

ABSTRACT

In order to fabricate thermally stabilized Al2TiO5 ceramics equimolar $alpha$-Al2O3 and TiO2 were mixed with bicomponent additives of 2, 5 and 10 mol% of equimolar MgO/ZrO2, SiO2/ZrO2 and MgO/SiO2 mixture and pressed before sintering at 150$0^{circ}C$ for 2h. Sintered bodies were heat-treated at 115$0^{circ}C$ for 24h. X-ray diffractometer was used for the phase analysis and measurement of lattice parameters. MgO/SiO2 doped Al2TiO5 ceramics was the most effective in suppression of thermal decomposition which seemed to a combined effect of moderating of structural distortion due to substitution of Al3+ by Mg2+ and the reaction products of its precipitated oxide Al2O3 and SiO2

Key words: Al$_2$TiO$_5$ Bicomponent Additive, Solid Solution, Thermal Decomposition