Abstract
The melting behaviour of the lead-doped 2223 phase in the bismuth oxide system has been investigated by using DTA, XRD and EPMA techniques. The results indicated that 2223 phase began to decompose into liquid, (Ca, Sr)2CuO3 and (Sr, Ca)14Cu24O41 phases when fired at T ≥ 860 °C in air. The liquid composition is located on the line between 2212 and 2201 phases. When the liquid was cooled in air, 2212 and 2201 phases crystallized from it.
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