|Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration|
|Jia DC; 邵颖峰(Shao YF); Liu BY; Zhou Y; Jia D
|Source Publication||Materials Chemistry and Physics
|Abstract||Porous silicon nitride/silicon oxynitride composite ceramics were fabricated by silica sol infiltration of aqueous gelcasting prefabricated Si3N4 green compact. Silica was introduced by infiltration to increase the green density of specimens, so suitable properties with low shrinkage of ceramics were achieved during sintering at low temperature. Si2N2O was formed through reaction between Si3N4 and silica sol at a temperature above 1550 degrees C. Si3N4/Si2N2O composite ceramics with a low linear shrinkage of 1.3-5.7%, a superior strength of 95-180 MPa and a moderate dielectric constant of 4.0-5.0 (at 21-39 GHz) were obtained by varying infiltration cycle and sintering temperature. (C) 2010 Published by Elsevier B.V.|
|WOS Keyword||THERMAL-SHOCK RESISTANCE
; NITRIDE CERAMICS
|WOS Research Area||Materials Science
|WOS Subject||Materials Science, Multidisciplinary
|Funding Organization||National Natural Science Foundation of China (NSFC) 
; Harbin Institute of Technology
; Science Fund for Distinguished Young Scholars of Heilongjiang province
|Corresponding Author||Jia D|
Jia DC,Shao YF,Liu BY,et al. Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration[J]. Materials Chemistry and Physics,2010,124(1):97-101.
Jia DC,邵颖峰,Liu BY,Zhou Y,&Jia D.(2010).Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration.Materials Chemistry and Physics,124(1),97-101.
Jia DC,et al."Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration".Materials Chemistry and Physics 124.1(2010):97-101.