Abstract
The decomposition behaviour of 0.9MgTiO 3–0.1CaTiO 3 dielectric ceramic during a liquid phase sintering by lithium borosilicate (LBS) glass was studied. The decompositions of MgTiO 3 into MgTi 2O 5 and Mg 2TiO 4 were apparent during the sintering although the reactions are thermodynamically unfavourable in glass-free compositions. The role of the LBS glass in favouring the decomposition reaction was investigated in terms of the thermodynamic activity of the reaction product in the glass. The decomposition reactions were not necessarily harmful because of the high dielectric performance of the decomposition products, MgTi 2O 5 (17.4 permittivity; 47,000 GHz quality factor) and Mg 2TiO 4 (14.4 and 55,000 GHz, respectively).
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