摘要
Abstract
This study uses silicon carbide as main material,with carboxymethyl cellulose(CMC)as the pore-forming a-gent,respectively,with SiO2-Y2O3-Al2O3and SiO2-kaolin as the sintering agent,preparation of porous silicon car-bide ceramics.In this experiment,the porosity of porous ceramics by measuring Archimedes rate,its hardness was meas-ured by Rockwell hardness tester,the bending strength was measured using a universal testing machine.The experimental results show that:with SiO2-Y2O3-Al2O3as sintering aid,and the content of SiO2-Y2O3-Al2O3was 20%,the per-formances of porous SiC ceramics prepared with kaolin than SiO2-kaolin as sintering aids advantages.Taking SiO2-Y2O3-Al2O3as sintering aids,at 1 500 ℃ can porous silicon carbide ceramics with good properties was prepared.When the content of SiO2-Y2O3-Al2O3is 20%,the preparation of porous SiC ceramics prepared with mechanical properties of high porosity and excellent,the open porosity is 23.73%,hardness and bending strength is 62 MPa and 15.47 MPa respec-tively,at the same time,its uniform pore distribution.关键词
碳化硅陶瓷/助烧剂/气孔率/力学性能/晶体组成/晶体结构Key words
Silicon carbide ceramics/Burn aid/Porosity/Mechanical properties/Crystal structure/Crystal structure分类
化学化工
