Articles
  • Effects of xonotlite additive and forming pressure on the properties of the SiO2-based nanoporous thermal insulation materials
  • Shiwei Liua , Jingkun Yub,*, Lu Hanc and Beiyue Mab,*
  • a School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, P. R. China b School of Metallurgy, Northeastern University, Shenyang 110819, P. R. China c School of High Temperature Materials and Magnesite Resources Engineering University of Science and Technology LiaoNing, Anshan 114051, P. R. China
Abstract
Nanoporous thermal insulation materials prepared with fumed SiO2 possess excellent thermal insulation property, and have been attracted much attention, but their mechanical properties are poor. Adding a small amount of fiber materials as a toughening material can improve the mechanical properties of the nanoporous thermal insulation materials. However, too much fiber materials additives will seriously affect the thermal insulation property. In this study, SiO2-based nanoporous thermal insulation materials were prepared, and the effects of addition amounts of xonotlite and forming pressure on the mechanical performance and thermal insulation performance of as-prepared thermal insulation materials were investigated. It was found that addition of 10% xonotlite and forming pressure of 2MPa were proper for the preparation of SiO2-based nanoporous thermal insulation materials. The compressive strength and thermal conductivity of as-prepared materials were 0.34 MPa and 0.031 W·m−1·K−1, respectively.

Keywords: Xonotlite; Nanoporous Insulation Materials; Fumed SiO2; Compressive Strength; Thermal Insulation Property.

This Article

  • 2018; 19(3): 206-210

    Published on Jun 30, 2018