Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si3N4 composite ceramics prepared by gel casting

Shengjin Wang; Dechang Jia; Zhihua Yang; Xiaoming Duan; Yu Zhou

Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting

Shengjin Wang
, Dechang Jia^*
, Zhihua Yang
, Xiaoming Duan
, Yu Zhou

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Porous h-BN/Si₃N₄ composite ceramics with different h-BN contents (5vol.%, 10vol% and 15vol.%) have been fabricated by gel casting. Sintering was carried out at 1750°C for 1h under a 0.1MPa nitrogen atmosphere. For comparison, porous Si₃N₄ ceramic was also prepared following the same route. The h-BN content has strong influence on the rheological behaviors of the suspensions, and the slurry has a suitable viscosity when h-BN content is lower than 10vol.%. Effects of h-BN content on the microstructure, mechanical properties, dielectric properties and thermal shock resistance of h-BN/Si₃N₄ composite ceramics were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies showed that h-BN particles homogeneously scattered in the β-Si ₃N4 matrix, and the porous h-BN/Si₃N₄ composite ceramics show a superiorly comprehensive performance compared with porous Si₃N₄. For the 10vol.%h-BN/Si₃N₄ composite ceramics with a porosity of 49.4%, the flexural strength of 106.6MPa,dielectric constant of about 3.8 and a tangent loss of (3∼7) ×10^-3 indicating that it could be one of the most ideal candidates for wave-transparent applications.

Original language	English
Title of host publication	ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
Publisher	European Conference on Composite Materials, ECCM
ISBN (Print)	9788888785332
State	Published - 2012
Event	15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, Italy Duration: 24 Jun 2012 → 28 Jun 2012

Publication series

Name	ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

Conference

Conference	15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
Country/Territory	Italy
City	Venice
Period	24/06/12 → 28/06/12

Keywords

Dielectric properties
Gel casting
Mechanical properties
Porous
Rheological behaviors
Thermal shock resistance

Cite this

Wang, S., Jia, D., Yang, Z., Duan, X., & Zhou, Y. (2012). Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting. In ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials (ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials). European Conference on Composite Materials, ECCM.

Wang, Shengjin ; Jia, Dechang ; Yang, Zhihua et al. / Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting. ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 2012. (ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials).

@inproceedings{f1d2c69c17484a3290900275003a58bf,

title = "Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si3N4 composite ceramics prepared by gel casting",

abstract = "Porous h-BN/Si3N4 composite ceramics with different h-BN contents (5vol.\%, 10vol\% and 15vol.\%) have been fabricated by gel casting. Sintering was carried out at 1750°C for 1h under a 0.1MPa nitrogen atmosphere. For comparison, porous Si3N4 ceramic was also prepared following the same route. The h-BN content has strong influence on the rheological behaviors of the suspensions, and the slurry has a suitable viscosity when h-BN content is lower than 10vol.\%. Effects of h-BN content on the microstructure, mechanical properties, dielectric properties and thermal shock resistance of h-BN/Si3N4 composite ceramics were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies showed that h-BN particles homogeneously scattered in the β-Si 3N4 matrix, and the porous h-BN/Si3N4 composite ceramics show a superiorly comprehensive performance compared with porous Si3N4. For the 10vol.\%h-BN/Si3N4 composite ceramics with a porosity of 49.4\%, the flexural strength of 106.6MPa,dielectric constant of about 3.8 and a tangent loss of (3∼7) ×10-3 indicating that it could be one of the most ideal candidates for wave-transparent applications.",

keywords = "Dielectric properties, Gel casting, Mechanical properties, Porous, Rheological behaviors, Thermal shock resistance",

author = "Shengjin Wang and Dechang Jia and Zhihua Yang and Xiaoming Duan and Yu Zhou",

year = "2012",

language = "英语",

isbn = "9788888785332",

series = "ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials",

publisher = "European Conference on Composite Materials, ECCM",

booktitle = "ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials",

note = "15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 ; Conference date: 24-06-2012 Through 28-06-2012",

}

Wang, S, Jia, D , Yang, Z, Duan, X & Zhou, Y 2012, Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting. in ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials. ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials, European Conference on Composite Materials, ECCM, 15th European Conference on Composite Materials: Composites at Venice, ECCM 2012, Venice, Italy, 24/06/12.

Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting. / Wang, Shengjin; Jia, Dechang ; Yang, Zhihua et al.
ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials. European Conference on Composite Materials, ECCM, 2012. (ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si3N4 composite ceramics prepared by gel casting

AU - Wang, Shengjin

AU - Jia, Dechang

AU - Yang, Zhihua

AU - Duan, Xiaoming

AU - Zhou, Yu

PY - 2012

Y1 - 2012

N2 - Porous h-BN/Si3N4 composite ceramics with different h-BN contents (5vol.%, 10vol% and 15vol.%) have been fabricated by gel casting. Sintering was carried out at 1750°C for 1h under a 0.1MPa nitrogen atmosphere. For comparison, porous Si3N4 ceramic was also prepared following the same route. The h-BN content has strong influence on the rheological behaviors of the suspensions, and the slurry has a suitable viscosity when h-BN content is lower than 10vol.%. Effects of h-BN content on the microstructure, mechanical properties, dielectric properties and thermal shock resistance of h-BN/Si3N4 composite ceramics were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies showed that h-BN particles homogeneously scattered in the β-Si 3N4 matrix, and the porous h-BN/Si3N4 composite ceramics show a superiorly comprehensive performance compared with porous Si3N4. For the 10vol.%h-BN/Si3N4 composite ceramics with a porosity of 49.4%, the flexural strength of 106.6MPa,dielectric constant of about 3.8 and a tangent loss of (3∼7) ×10-3 indicating that it could be one of the most ideal candidates for wave-transparent applications.

AB - Porous h-BN/Si3N4 composite ceramics with different h-BN contents (5vol.%, 10vol% and 15vol.%) have been fabricated by gel casting. Sintering was carried out at 1750°C for 1h under a 0.1MPa nitrogen atmosphere. For comparison, porous Si3N4 ceramic was also prepared following the same route. The h-BN content has strong influence on the rheological behaviors of the suspensions, and the slurry has a suitable viscosity when h-BN content is lower than 10vol.%. Effects of h-BN content on the microstructure, mechanical properties, dielectric properties and thermal shock resistance of h-BN/Si3N4 composite ceramics were investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies showed that h-BN particles homogeneously scattered in the β-Si 3N4 matrix, and the porous h-BN/Si3N4 composite ceramics show a superiorly comprehensive performance compared with porous Si3N4. For the 10vol.%h-BN/Si3N4 composite ceramics with a porosity of 49.4%, the flexural strength of 106.6MPa,dielectric constant of about 3.8 and a tangent loss of (3∼7) ×10-3 indicating that it could be one of the most ideal candidates for wave-transparent applications.

KW - Dielectric properties

KW - Gel casting

KW - Mechanical properties

KW - Porous

KW - Rheological behaviors

KW - Thermal shock resistance

UR - https://www.scopus.com/pages/publications/84903973759

M3 - 会议稿件

AN - SCOPUS:84903973759

SN - 9788888785332

T3 - ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

BT - ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

PB - European Conference on Composite Materials, ECCM

T2 - 15th European Conference on Composite Materials: Composites at Venice, ECCM 2012

Y2 - 24 June 2012 through 28 June 2012

ER -

Wang S, Jia D , Yang Z, Duan X, Zhou Y. Effect of h-BN on the mechanical and dielectric properties of porous h-BN/Si₃N₄ composite ceramics prepared by gel casting. In ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials. European Conference on Composite Materials, ECCM. 2012. (ECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials).