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《Journal of Plasticity Engineering》 2007-01
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The experimental research on the low-voltage electromagnetic compaction of PZT ceramic powders

HUANG Shang-yu SHI Jian MENG Zheng-hua SUN Wei(Wuhan University of Technology,Wuhan 430070 China)GUO Kai-hua(Wuhan Institute of Technology,Wuhan 430074 China)  
After success in making high-density products by the indirect low-voltage electromagnetic compaction of PZT ceramic powders,the effect of voltage,capacitance,dimension and the pressing number on the pressed density have been investigated.The results have shown that there exists a discharge voltage range during which PZT powders can be pressed effectively.With the discharge voltage raising,the sample's density and the density of sintered part increase,sinter performance is improved,and increase of part's density tends to slower firstly.When the discharge voltage exceeds the optimum value,sample's density becomes decrease and sintered part density are dropped greatly.Similarly enlarging the capacitance can also increase the pressed density,improve sinter performance and decrease the optimum discharge voltage to a certain extent.If the other parameters remain constant,the higher the height to radius ratio of the part is,the lower the pressed density and the sintered part's density,and the higher the optimum discharge voltage consequently.Twice compaction is an efficient way to get high density PZT product and its optimum discharge voltage decreases because of the efficient increase of pressed density.In addition,it is also an efficient way to get high density PZT product if the equipment lacks of enough energy.Compared with the static compaction,low-voltage electromagnetic compaction can increase PZT product's density and improve its sinter performance.
【Fund】: 国家自然科学基金资助项目(50375114);; 华中科技大学塑性成形模拟及模具技术国家重点实验室资助项目(05-03)
【CateGory Index】: TQ174.1
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