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Bi 12 SiO 20 ceramics were well sintered at 800°C after calcination at 700°C. A liquid phase of composition Bi 2 O 3 was formed during the sintering at temperatures ≥800°C and assisted the densification of the Bi 12 SiO 20 ceramics. When the sintering temperature exceeded 800°C, however, the relative density, ɛ r , and Q×f values of the Bi ...
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