A novel silica aerogel/porous Si3N4 composite prepared by freeze casting and sol-gel impregnation with high-performance thermal insulation and wave-transparent

Haixia Yang; Feng Ye; Qiang Liu; Shichao Liu; Ye Gao; Limeng Liu

doi:10.1016/j.matlet.2014.10.012

A novel silica aerogel/porous Si₃N₄ composite prepared by freeze casting and sol-gel impregnation with high-performance thermal insulation and wave-transparent

Haixia Yang
, Feng Ye^*
, Qiang Liu
, Shichao Liu
, Ye Gao
, Limeng Liu

^*Corresponding author for this work

Harbin Institute of Technology

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

59 Scopus citations

Abstract

A novel silica aerogel/porous Si₃N₄ composite with high-performance thermal insulation and wave-transparent has been prepared by freeze casting and sol-gel impregnation. The morphology, microstructure and properties of the composite were investigated. After impregnating of silica aerogel, the composite has nanometer porous structures. The results of performance test show that the room-temperature thermal conductivity remarkably decreased and the compressive strength increased while impregnating porous Si₃N₄ with silica aerogel. The composite exhibits low thermal conductivity (0.043 Wm^-1K^-1), low dielectric constant (~1.6) and loss tangent (~0.0018). The silica aerogel/porous Si₃N₄ composite can be suitable for use in thermal insulation and wave-transparent functional integration material.

Original language	English
Pages (from-to)	135-138
Number of pages	4
Journal	Materials Letters
Volume	138
DOIs	https://doi.org/10.1016/j.matlet.2014.10.012
State	Published - 1 Jan 2015
Externally published	Yes

Keywords

Impregnation
Microstructure
Porous materials
Thermal insulation
Wave-transparent

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10.1016/j.matlet.2014.10.012

Cite this

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title = "A novel silica aerogel/porous Si3N4 composite prepared by freeze casting and sol-gel impregnation with high-performance thermal insulation and wave-transparent",

abstract = "A novel silica aerogel/porous Si3N4 composite with high-performance thermal insulation and wave-transparent has been prepared by freeze casting and sol-gel impregnation. The morphology, microstructure and properties of the composite were investigated. After impregnating of silica aerogel, the composite has nanometer porous structures. The results of performance test show that the room-temperature thermal conductivity remarkably decreased and the compressive strength increased while impregnating porous Si3N4 with silica aerogel. The composite exhibits low thermal conductivity (0.043 Wm-1K-1), low dielectric constant (\textasciitilde{}1.6) and loss tangent (\textasciitilde{}0.0018). The silica aerogel/porous Si3N4 composite can be suitable for use in thermal insulation and wave-transparent functional integration material.",

keywords = "Impregnation, Microstructure, Porous materials, Thermal insulation, Wave-transparent",

author = "Haixia Yang and Feng Ye and Qiang Liu and Shichao Liu and Ye Gao and Limeng Liu",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jan,

day = "1",

doi = "10.1016/j.matlet.2014.10.012",

language = "英语",

volume = "138",

pages = "135--138",

journal = "Materials Letters",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - A novel silica aerogel/porous Si3N4 composite prepared by freeze casting and sol-gel impregnation with high-performance thermal insulation and wave-transparent

AU - Yang, Haixia

AU - Ye, Feng

AU - Liu, Qiang

AU - Liu, Shichao

AU - Gao, Ye

AU - Liu, Limeng

PY - 2015/1/1

Y1 - 2015/1/1

N2 - A novel silica aerogel/porous Si3N4 composite with high-performance thermal insulation and wave-transparent has been prepared by freeze casting and sol-gel impregnation. The morphology, microstructure and properties of the composite were investigated. After impregnating of silica aerogel, the composite has nanometer porous structures. The results of performance test show that the room-temperature thermal conductivity remarkably decreased and the compressive strength increased while impregnating porous Si3N4 with silica aerogel. The composite exhibits low thermal conductivity (0.043 Wm-1K-1), low dielectric constant (~1.6) and loss tangent (~0.0018). The silica aerogel/porous Si3N4 composite can be suitable for use in thermal insulation and wave-transparent functional integration material.

AB - A novel silica aerogel/porous Si3N4 composite with high-performance thermal insulation and wave-transparent has been prepared by freeze casting and sol-gel impregnation. The morphology, microstructure and properties of the composite were investigated. After impregnating of silica aerogel, the composite has nanometer porous structures. The results of performance test show that the room-temperature thermal conductivity remarkably decreased and the compressive strength increased while impregnating porous Si3N4 with silica aerogel. The composite exhibits low thermal conductivity (0.043 Wm-1K-1), low dielectric constant (~1.6) and loss tangent (~0.0018). The silica aerogel/porous Si3N4 composite can be suitable for use in thermal insulation and wave-transparent functional integration material.

KW - Impregnation

KW - Microstructure

KW - Porous materials

KW - Thermal insulation

KW - Wave-transparent

UR - https://www.scopus.com/pages/publications/84908441343

U2 - 10.1016/j.matlet.2014.10.012

DO - 10.1016/j.matlet.2014.10.012

M3 - 文章

AN - SCOPUS:84908441343

SN - 0167-577X

VL - 138

SP - 135

EP - 138

JO - Materials Letters

JF - Materials Letters

ER -

A novel silica aerogel/porous Si₃N₄ composite prepared by freeze casting and sol-gel impregnation with high-performance thermal insulation and wave-transparent

Abstract

Keywords

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