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Lead zirconate titanate/silicon carbide composite ceramic materials and method for preparing same

A technology of lead zirconate titanate and composite ceramics, which is applied in the field of ferroelectric materials, can solve the problems affecting the sintering performance of the porcelain body and the difficulty of compacting the porcelain body, so as to improve the mechanical properties and electric breakdown strength, and increase the insulation resistance Effect

Inactive Publication Date: 2006-12-27
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of nano-SiC seriously affects the sintering performance of the porcelain body, making it difficult for the porcelain body to be completely dense

Method used

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  • Lead zirconate titanate/silicon carbide composite ceramic materials and method for preparing same
  • Lead zirconate titanate/silicon carbide composite ceramic materials and method for preparing same
  • Lead zirconate titanate/silicon carbide composite ceramic materials and method for preparing same

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Embodiment 1

[0031] Pb in powder form 3 o 4 , ZrO 2 ,TiO 2 , Nb 2 o 5 and SiC powder with an average particle size of 2 μm as raw materials, according to the stoichiometric ratio of Pb(Zr 0.965 Ti 0.035 )O 3 +1wt.%Nb 2 o 5 preparation. After wet ball milling for 8 hours, the material was discharged, dried, and the powder was pre-calcined at 850°C for 2 hours to obtain Pb(Zr 0.965 Ti 0.035 )O 3 +1wt.%Nb 2 o 5 Powder. The powder is then wet ball milled for 24 hours, discharged, dried, added 6wt.% PVA to granulate, and pressed to shape the powder under a pressure of 150Mpa; debinding at 800°C / 2h, and sintered at 1300°C / 2h. The fired samples are finely ground to obtain matrix ceramic samples. After the surface of the base ceramic sample is finely ground and ultrasonically cleaned, the sample is embedded in SiC micropowder, heat-treated at 850°C for 2 hours, and then the parallel surface is finely ground to about 0.2mm, and then it is burnt by silver electrodes and high-temperat...

Embodiment 2

[0033] Pb in powder form 3 o 4 , ZrO 2 ,TiO 2 , Nb 2 o 5 and SiC powder with an average particle size of 2 μm as raw materials, according to the stoichiometric ratio of Pb(Zr 0.965 Ti0.035 )O 3 +1wt.%Nb 2 o 5 preparation. After wet ball milling for 8 hours, the material was discharged, dried, and the powder was pre-calcined at 850°C for 2 hours to obtain Pb(Zr 0.965 Ti 0.035 )O 3 +1wt.%Nb 2 o 5 Powder. The powder was then wet ball milled for 24 hours, discharged, dried, added 6wt.% PVA to granulate, and pressed to form the powder under a pressure of 150Mpa; debinding at 800°C / 2h, and sintered at 1300°C / 2h. The fired samples are finely ground to obtain matrix ceramic samples. After the surface of the base ceramic sample is finely ground and ultrasonically cleaned, the sample is embedded in SiC micropowder, heat-treated at 850°C for 4 hours, and then the parallel surface is finely ground to about 0.2mm, and then it is fired by silver electrode and high temperature...

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Abstract

The invention discloses a lead zirconate titanate / composite ceramic material of carborundum and preparing method in the ironic voltage electric material domain, whose component is yPb(ZrxTi1-x)O3+zSiC (95wt%<=y<100wt%,0<z<=5wt%,0<=x<=100wt%). The making method comprises the following steps: adopting Pb3O4,ZrO2, TiO2,Nb2O5 and nanometer or micrometer grade SiC powder as raw material; dispensing; balling; draining; drying; precasting; pelleting; moulding; discharging glue; sintering in the furnace at 1250-1350 deg.c for 1-3h; cooling naturally to obtain base ceramic sample; grinding surface of ceramic sample; coating or packing SiC micro-powder on the surface or burying in the SiC micro-powder; disposing at 600-1000 deg.c for 1-8h to obtain the product.

Description

technical field [0001] The invention relates to a lead zirconate titanate / silicon carbide composite ceramic material and a preparation method thereof, belonging to the field of ferroelectric piezoelectric materials. technical background [0002] Lead zirconate titanate (Pb(Zr 1-x Ti x )O 3 , referred to as PZT) ceramics have been widely used in filters, transducers and infrared detectors due to their excellent piezoelectric, ferroelectric and pyroelectric properties. PZT ceramics with different electrical properties can be obtained by adjusting the ratio of zirconium to titanium; for different applications, the properties of PZT materials can be further adjusted and optimized by ion replacement or doping. However, due to the inherent characteristics of high brittleness of functional ceramics, its application under high power, high strain or high frequency is severely limited. In addition, PZT ceramics sometimes need to be used under an external high electric field, so th...

Claims

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Application Information

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IPC IPC(8): C04B35/491C04B35/622
Inventor 董显林杨洪
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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