Abstract
In this study, the influence of forming pressure and sintering temperature on the mechanical properties of ring-type PZT (lead zirconate titanate) ceramics was investigated. The PZT ceramics were formed by a hot press device and then sintered in the pressless sintering furnace. The diametral contraction rate of the PZT ceramics was lower with increasing forming pressure and the density of the PZT ceramics was increased with increasing the forming pressure. The reason for this is that the high forming pressure caused more contact points of PZT powder, and it resulted in faster sintering rate. The effect of forming pressure by HP was evident in the direction of diameter rather than in the direction of the length of the ring. The compression strength of the ring-type PZT ceramics increased with higher forming pressure. The grain size of the PZT ceramics was larger with increasing the sintering temperature. The compression strength of the ring-type PZT ceramics has been greatly improved by heat treatment in the range of 350℃ to 500℃.
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