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Effect of Titanium Dioxide Particles on the Thermal Stability of Silica Aerogels.
Fan, Caide; Lu, Jialu; Duan, Chengjie; Wu, Chengbin; Lin, Jiming; Qiu, Ruoxiang; Zhang, Zehui; Yang, Jianming; Zhou, Bin; Du, Ai.
Afiliación
  • Fan C; School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
  • Lu J; Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University, Shanghai 200092, China.
  • Duan C; School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
  • Wu C; Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University, Shanghai 200092, China.
  • Lin J; China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518000, China.
  • Qiu R; School of Physics Science and Engineering, Tongji University, Shanghai 200092, China.
  • Zhang Z; Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University, Shanghai 200092, China.
  • Yang J; China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518000, China.
  • Zhou B; Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
  • Du A; China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518000, China.
Nanomaterials (Basel) ; 14(15)2024 Aug 02.
Article en En | MEDLINE | ID: mdl-39120409
ABSTRACT
Silica aerogels exhibit a unique nanostructure with low thermal conductivity and low density, making them attractive materials for thermal isolation under extreme conditions. The TiO2 particle is one of the common industrial additives used to reduce the thermal radiation of aerogel composites under high-temperature environments, but its influence on thermal resistance is almost unknown. Herein, we report the effect of TiO2 nanoparticles with different crystal phases and different sizes on the thermal stability of silica aerogel composites. By adding TiO2 nanoparticles, the aerogel can significantly resist collapse at high temperatures (up to 1000 °C). And compared with the rutile phase TiO2, the anatase phase TiO2 shows much higher temperature resistance performance, with shrinkage of only one-sixth of the rutile phase after 800 °C treatment. Interestingly, energy-dispersive spectrometer mapping results show that after 800 °C treatment, silica nanoparticles (NPs) are squeezed out in between anatase TiO2 particles, which resists the coarsening of silica NPs and ultimately enhances the stability of aerogel composites. The optimal anatase phase TiO2-doped silica aerogel demonstrates the integrated properties of crack-free morphology (2.84% shrinkage), low thermal conductivity (29.30 mW/(m·K)) and low density (149.4 mg/cm3) after 800 °C treatment. This study may provide new insights for developing oxide-doped silica aerogels with both high-temperature resistance and low thermal radiation.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanomaterials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza