Non-pressure infiltration preparation process of functionally graded piezoelectric material (FGPM)
A piezoelectric material and functionally gradient technology, which is applied in the field of preparation of metal-based ceramic functionally gradient piezoelectric materials, can solve the problems of thin-walled parts being easily fractured, increasing production costs, and making small shapes, achieving excellent thermodynamic properties, Short time, high density effect
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[0038] A pressureless impregnation preparation process for functionally graded piezoelectric materials of the present invention comprises the following steps:
[0039] 1) Raw material preparation: raw materials include vacuum-encapsulated Fe powder, PZT-5 powder and binder (PVA17-88 powder), and the particle size of Fe powder is 7 ; The particle size of PZT-5 powder is 2.5 , 6.5 、15 and 44 , the particle size of the binder is 10 PVA17-88;
[0040] 2) Preform molding: Mix the above-mentioned PZT-5 powder, Fe powder and PVA17-88 powder in the Etelux Lab2000 glove box according to the volume ratio, and then lay five layers in the steel mold from bottom to top, the first layer 1. The second layer 2, the third layer 3 and the fourth layer 4 are all mixed powders of PZT-5 powder, Fe powder and PVA17-88 powder, and the fifth layer 5 only has Fe powder. The specific ratio of raw materials in each layer and The thickness is shown in Table 1,
[0041] Table 1. Specific rati...
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