A novel silica aerogel/porous Y2SiO5 ceramics with low thermal conductivity and enhanced mechanical properties prepared by freeze casting and impregnation

Rubing Zhang; Qiang Qu; Bingyu Han; Baolin Wang

doi:10.1016/j.matlet.2016.04.051

A novel silica aerogel/porous Y2SiO5 ceramics with low thermal conductivity and enhanced mechanical properties prepared by freeze casting and impregnation

Rubing Zhang, Qiang Qu, Bingyu Han, Baolin Wang

Western Sydney University

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

32 Citations (Scopus)

Abstract

A novel silica aerogel/porous Y 2SiO 5 composite was prepared by freeze casting and sol-gel impregnation. Porous Y 2SiO 5 ceramics with different solids contents were prepared at 1400 Â°C. The pore structure, porosity and mechanical properties of the porous Y 2SiO 5 ceramics before and after impregnating of silica aerogel were investigated. The results show that the room-temperature thermal conductivity decreases and the compressive strength increases remarkably while impregnating porous Y 2SiO 5 with silica aerogel. The silica aerogel/porous Y 2SiO 5 composite exhibits a high compressive strength (i.e. 9.3 MPa) and a low thermal conductivity (i.e. 0.260 W/(mK)). This work reports an optimal processing method of silica aerogel/porous Y 2SiO 5 composite with the potential application as a high-temperature thermal insulation material.

Original language	English
Pages (from-to)	219-222
Number of pages	4
Journal	Materials Letters
Volume	175
DOIs	https://doi.org/10.1016/j.matlet.2016.04.051
Publication status	Published - 15 Jul 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Keywords

porous materials
thermal properties
ultra-high-temperature ceramics

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10.1016/j.matlet.2016.04.051

Cite this

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title = "A novel silica aerogel/porous Y2SiO5 ceramics with low thermal conductivity and enhanced mechanical properties prepared by freeze casting and impregnation",

abstract = "A novel silica aerogel/porous Y 2SiO 5 composite was prepared by freeze casting and sol-gel impregnation. Porous Y 2SiO 5 ceramics with different solids contents were prepared at 1400 {\^A}°C. The pore structure, porosity and mechanical properties of the porous Y 2SiO 5 ceramics before and after impregnating of silica aerogel were investigated. The results show that the room-temperature thermal conductivity decreases and the compressive strength increases remarkably while impregnating porous Y 2SiO 5 with silica aerogel. The silica aerogel/porous Y 2SiO 5 composite exhibits a high compressive strength (i.e. 9.3 MPa) and a low thermal conductivity (i.e. 0.260 W/(mK)). This work reports an optimal processing method of silica aerogel/porous Y 2SiO 5 composite with the potential application as a high-temperature thermal insulation material.",

keywords = "porous materials, thermal properties, ultra-high-temperature ceramics",

author = "Rubing Zhang and Qiang Qu and Bingyu Han and Baolin Wang",

year = "2016",

month = jul,

day = "15",

doi = "10.1016/j.matlet.2016.04.051",

language = "English",

volume = "175",

pages = "219--222",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier",

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TY - JOUR

T1 - A novel silica aerogel/porous Y2SiO5 ceramics with low thermal conductivity and enhanced mechanical properties prepared by freeze casting and impregnation

AU - Zhang, Rubing

AU - Qu, Qiang

AU - Han, Bingyu

AU - Wang, Baolin

PY - 2016/7/15

Y1 - 2016/7/15

N2 - A novel silica aerogel/porous Y 2SiO 5 composite was prepared by freeze casting and sol-gel impregnation. Porous Y 2SiO 5 ceramics with different solids contents were prepared at 1400 Â°C. The pore structure, porosity and mechanical properties of the porous Y 2SiO 5 ceramics before and after impregnating of silica aerogel were investigated. The results show that the room-temperature thermal conductivity decreases and the compressive strength increases remarkably while impregnating porous Y 2SiO 5 with silica aerogel. The silica aerogel/porous Y 2SiO 5 composite exhibits a high compressive strength (i.e. 9.3 MPa) and a low thermal conductivity (i.e. 0.260 W/(mK)). This work reports an optimal processing method of silica aerogel/porous Y 2SiO 5 composite with the potential application as a high-temperature thermal insulation material.

AB - A novel silica aerogel/porous Y 2SiO 5 composite was prepared by freeze casting and sol-gel impregnation. Porous Y 2SiO 5 ceramics with different solids contents were prepared at 1400 Â°C. The pore structure, porosity and mechanical properties of the porous Y 2SiO 5 ceramics before and after impregnating of silica aerogel were investigated. The results show that the room-temperature thermal conductivity decreases and the compressive strength increases remarkably while impregnating porous Y 2SiO 5 with silica aerogel. The silica aerogel/porous Y 2SiO 5 composite exhibits a high compressive strength (i.e. 9.3 MPa) and a low thermal conductivity (i.e. 0.260 W/(mK)). This work reports an optimal processing method of silica aerogel/porous Y 2SiO 5 composite with the potential application as a high-temperature thermal insulation material.

KW - porous materials

KW - thermal properties

KW - ultra-high-temperature ceramics

UR - http://handle.uws.edu.au:8081/1959.7/uws:36066

UR - http://ezpoxy.uws.edu.au/login?url=http://www.sciencedirect.com/science/article/pii/S0167577X16305304

U2 - 10.1016/j.matlet.2016.04.051

DO - 10.1016/j.matlet.2016.04.051

M3 - Article

SN - 0167-577X

VL - 175

SP - 219

EP - 222

JO - Materials Letters

JF - Materials Letters

ER -

A novel silica aerogel/porous Y2SiO5 ceramics with low thermal conductivity and enhanced mechanical properties prepared by freeze casting and impregnation

Abstract

Bibliographical note

Keywords

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