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Fabricating Method of Thick Film Using Compound of Relaxer Ferroelectric Ceramics and Polymer Matrix
Fabricating Method of Thick Film Using Compound of Relaxer Ferroelectric Ceramics and Polymer Matrix
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机译：弛豫铁电陶瓷与聚合物基质复合制备厚膜的方法
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摘要
PURPOSE: Provided is a preparation method of relaxer ferroelectric ceramic thick films for multi-layer ceramic capacitors by spreading ferroelectric ceramic powder on a high molecular matrix homogeneously without sintering. CONSTITUTION: The preparation method comprises the steps of: grinding Pb-based relaxer ferroelectric ceramics, Pb(B'2+1/3 B''5+2/3)O3 system or Pb(B'3+1/2 B''5+1/2)O3 system, where B'2+ is one of Mg2+, Ni2+, Zn2+ and Cd2+, B''5+ is one of Nb5+ and Ta5+, and B'3+ is one of Fe3+, Sc3+ and In3+; melting a high molecular material, polypropylene less than 10000 in molecular weight, at 180-220deg.C; adding relaxer ferroelectric ceramic powder to melted high molecular material, and mixing in a rate of 20-40rpm for 20-40min for a homogeneous mixture; forming a thick film by spin-coating or extruding the mixture on a substrate, Cu-substrate, where the dropping amounts of the mixture are 30-60drops in a rate of 1-3drops/min, and the substrate is rotated in a rate of 300-500rpm, in the spin coating. The resultant ferroelectric thick films for multi-layer ceramic capacitors prepared without sintering have 1.32-2.90micrometer of thickness and 78-1905 of dielectric constant(at 25deg.C).
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