| Title | Fabrication and Properties of Si3N4 Fiber Material in a novel Method |
| Thematic area | Energy Saving and Insulation |
| Presenter | Prof. Wang Gang |
| Authors | Prof. Wang Gang, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China Mr. Han Jianshen, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China Dr. Yuan Bo, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China Mr. Dong Binbin, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China Mr. Chen Kuo, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China Prof. Li Hongxia, Sinosteel Corporation Luoyang Institute of Refractory Research Co., Ltd., Luoyang - China |
|
Abstract
In this paper, Low-cost Si3N4 fiber material was synthesized by heating silicon porous body prepared via direct foaming method at 1400°C for 5h in a flowing N2 atmosphere. The influence of addition of foaming agent on the properties of Si3N4 fiber material was studied. The results showed that with the addition of foaming agent increased from 1 wt % to 4 wt %, the bulk density of Si3N4 fiber material reduced from 0.76 g/cm3 to 0.37 g/cm3, the compressive strength reduced from 6.1 Mpa to 1.6 Mpa and the thermal conductivity at 1000°C descended from 0.494 W·M-1·K-1 to 0.216 W·M-1·K-1. After staying in the cryolite steam at 1000°C for 50h, the properties of Si3N4 fiber material changed little. These indicate that Si3N4 fiber material has excellent thermal insulating performance and erosion resistance. Key Words: Si3N4 fiber; porous; nitride; thermal insulation |
|