Decomposition of Al2TiO5-MgTi2O5solid solutions: a thermodynamic approach

✍ Scribed by V. Buscaglia; G. Battilana; M. Leoni; P. Nanni

• Publisher: Springer
• Year: 1996
• Tongue: English
• Weight: 911 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00355899

✦ Synopsis

The decomposition of AI2{1 x)MgxTi(l +x/05 solid solutions with x = 0.0, 0.1, 0.2, 0.4, 0.5 and 0.6 was studied in the temperature range 900-1175~ using a 250 h annealing test. As x increases from 0-0.2 there is a strong stabilizing effect and the decomposition temperature decreases from 1280~ downto m1125~ For 0.2 ~< x ~ 0.5 the decomposition temperature does not decrease further. For x=0.6 no decomposition was observed. For x ~< 0.5 decomposition is complete or almost complete at 1000 ~ at 900 ~ transformation is kinetically hindered and solid solutions with x=0.2 and 0.4 are unaffected by the thermal treatment. A relationship between the decomposition temperature and the parameter x has been derived using the regular solution model to describe the AI2{1 x~MgxTi~l+x~05 solid solution.