Open AccessFabrication of porous filter material for the integrated gasification combined cycle
Author(s) -
Yong Ding,
Yuan Lu,
Chen Bi,
Yating Xu,
Yu Sun,
Cong Ding
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1681/1/012001
Subject(s) - materials science , porosity , silicon nitride , sintering , ceramic , carbothermic reaction , porous silicon , sialon , nitride , composite material , microstructure , scanning electron microscope , phase (matter) , silicon , flexural strength , fabrication , chemical engineering , metallurgy , layer (electronics) , medicine , carbide , chemistry , alternative medicine , organic chemistry , pathology , engineering
The porous ceramic filter material is the most effective filter materials in the integrated gasification combined cycle. The porous silicon nitride due to its higher mechanical strength, as well as good corrosion resistance, is considered as a promising material in the integrated gasification combined cycle. In this paper, porous silicon nitride ceramics with high porosity and uniform pore structure was prepared by carbothermal reduction reaction between low-cost diatomite and carbon black. The influence of the type of sintering additives and the size of diatomite particles was investigated. Microstructures and mechanical properties of porous silicon nitride ceramics were studied by XRD, SEM and three-point bending measurement. XRD analysis showed that β-Si 3 N 4 phase, α-Si 3 N 4 phase, Sialon phase Si 5 AlON 7 and glass phase Y 2 Si 3 O 3 N 4 were detected. SEM analysis showed that porous silicon nitride ceramics was composed of rod-like (β-Si 3 N 4 grains and uniform pores.