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Preparation and Thermal Insulation Property of BCN-TiN Composite Aerogels by In-Situ Carbothermal Reduction/Nitridation Method.
- Source :
- Metallurgical & Materials Transactions. Part A; Nov2023, Vol. 54 Issue 11, p4332-4341, 10p
- Publication Year :
- 2023
-
Abstract
- Non-oxide ceramic aerogel draws increasing attention in area of thermal insulation because of its low density, high temperature resistance and good chemical/thermal stability. Here, a BCN-TiN composite aerogel was prepared by an in-situ carbothermal reduction/nitridation method, using melamine (C<subscript>3</subscript>N<subscript>6</subscript>H<subscript>6</subscript>), boric acid (H<subscript>3</subscript>BO<subscript>3</subscript>), chitosan ((C<subscript>6</subscript>H<subscript>11</subscript>NO<subscript>4</subscript>)<subscript>n</subscript>) and titanium dioxide (TiO<subscript>2</subscript>) as raw materials. The aerogel prepared at 1473 K showed a porosity high up to 97.6 pct with a density of 0.05 g/cm<superscript>3</superscript>. When testing at a temperature of 673 K, the thermal conductivity value of as-obtained composite aerogel was as low as 0.135 W/(m K). Moreover, the lightweight BCN-TiN aerogel had the high-temperature stability (at least 1473 K) and good compression strength, which ensures it a potential high-temperature insulation material in inert atmosphere. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10735623
- Volume :
- 54
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Metallurgical & Materials Transactions. Part A
- Publication Type :
- Academic Journal
- Accession number :
- 172438414
- Full Text :
- https://doi.org/10.1007/s11661-023-07167-w