Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration

Dechang Jia; Yingfeng Shao; Boyang Liu; Yu Zhou

doi:10.1016/j.matchemphys.2010.05.073

Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration

Dechang Jia^*
, Yingfeng Shao
, Boyang Liu
, Yu Zhou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

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. Si ₂N₂O was formed through reaction between Si ₃N₄ and silica sol at a temperature above 1550 °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.

Original language	English
Pages (from-to)	97-101
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	124
Issue number	1
DOIs	https://doi.org/10.1016/j.matchemphys.2010.05.073
State	Published - 1 Nov 2010

Keywords

Ceramics
Dielectric properties
Mechanical properties
Sintering

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10.1016/j.matchemphys.2010.05.073

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title = "Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration",

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. Si 2N2O was formed through reaction between Si 3N4 and silica sol at a temperature above 1550 °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.",

keywords = "Ceramics, Dielectric properties, Mechanical properties, Sintering",

author = "Dechang Jia and Yingfeng Shao and Boyang Liu and Yu Zhou",

year = "2010",

month = nov,

day = "1",

doi = "10.1016/j.matchemphys.2010.05.073",

language = "英语",

volume = "124",

pages = "97--101",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration

AU - Jia, Dechang

AU - Shao, Yingfeng

AU - Liu, Boyang

AU - Zhou, Yu

PY - 2010/11/1

Y1 - 2010/11/1

N2 - 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. Si 2N2O was formed through reaction between Si 3N4 and silica sol at a temperature above 1550 °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.

AB - 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. Si 2N2O was formed through reaction between Si 3N4 and silica sol at a temperature above 1550 °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.

KW - Ceramics

KW - Dielectric properties

KW - Mechanical properties

KW - Sintering

UR - https://www.scopus.com/pages/publications/77957235793

U2 - 10.1016/j.matchemphys.2010.05.073

DO - 10.1016/j.matchemphys.2010.05.073

M3 - 文章

AN - SCOPUS:77957235793

SN - 0254-0584

VL - 124

SP - 97

EP - 101

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 1

ER -

Characterization of porous silicon nitride/silicon oxynitride composite ceramics produced by sol infiltration

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Keywords

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