Ceramic-metal composite to recover the bulk property of ceramic powder

Author

Wu, Kai ; Cheng, Yonghong ; Chen, Xiaolin

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an

fYear

2008

fDate

7-11 Sept. 2008

Firstpage

356

Lastpage

359

Abstract

An interval percolation model was put forward to describe the ceramic-metal composite, in which the contact resistance of ceramic powder was reduced so that the bulk property of the ceramic could be recovered. Monte-Carlo simulation confirmed that the bulk property can be surely recovered in a cubic network if the fraction of conductive sites is in the range of 0.101 to 0.311. Experimental works also indicated that the bulk property of positive temperature coefficient (PTC) of BaTiO₃ was recovered after the mixture of the BaTiO₃ ceramic powder and silver ink was baked. Moreover, it was shown that the percolation threshold decreased with the increase of the size of ceramic particles, and the PTC bulk property appeared more obviously at higher electrical field. This may provide a new way for the polymer/ceramic composite.

Keywords

Monte Carlo methods; ceramics; composite materials; contact resistance; percolation; powders; BaTiO₃; Monte-Carlo simulation; bulk property; ceramic powder; ceramic-metal composite; contact resistance; percolation threshold; polymer-ceramic composite; positive temperature coefficient; Ceramics; Composite materials; Conductors; Contact resistance; Dielectric materials; Dielectrics and electrical insulation; Polymers; Powders; Silver; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2008. (ISEIM 2008). International Symposium on

Conference_Location

Mie

Print_ISBN

978-4-88686-005-7

Electronic_ISBN

978-4-88686-006-4

Type

conf

DOI

10.1109/ISEIM.2008.4664454

Filename

4664454