Effect of Particle Size on Properties of Novel Thermal Insulation Materials Synthesized by Molten Salt Method

Abstract:

Novel heat insulation materials were synthesized by molten salt method by using natural forsterite and NaSO₄ molten salt. The insulation materials which have light weight and small size pore were obtained by using different particle size (44 μm, 74 μm and 250 μm) natural forsterite and NaSO₄ molten salt at 1000 °C-1150 °C for 10 h after treating by distilled water. The effects of particle size of forsterite on phase composition, sintering porperties, physical property and microstructure were studied. The results showed that the main pahse in all samples was Mg₂SiO₄Fe₂O₃ and MgFe₂O₄ which indicate that the NaSO₄ molten salt just play the role of Promoting particles sintering. The particle size of 74 μm have better bulk density and comprssive strength in all sample, at 1100 °C, the sample of bulk density is 1.54 g/cm³ and the apparent porosity is 0.498. In addition, the strength of the sample made of 44 μm forsterite materials was always higher than that used 74 μm forsterit, and was the lowest strength of sample used 250 μm forsterite.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 644-647
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.644
• Online since: March 2014
• Authors: Xiao Jun Zhang, Jun Ding, Hong Xi Zhu, Cheng Ji Deng*, Wen Jie Yuan
• Keywords: Forstreite, Molten Salt, Particle Size

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