以三元体系 Al 2 O 3 -Y 2 O 3 -SiO 2 作为 SiC 粉末的烧结助剂，石墨烯、淀粉、鳞片石墨为造孔剂，低温制备高孔隙率的多孔碳化硅陶瓷。探讨了造孔剂的种类对多孔碳化硅陶瓷的体积密度、气孔率和弯曲强度的影响，分析了多孔碳化硅陶瓷的相组成和显微结构。研究结果表明:(1)该体系中石墨烯的造孔效果优于淀粉和鳞片石墨的造孔效果，且以石墨烯为造孔剂的多孔 SiC 陶瓷的抗弯强度要高于以鳞片石墨为造孔剂的多孔 SiC 陶瓷，低于以淀粉为造孔剂的多孔 SiC 陶瓷。(2)在 1400 ℃下以不同的造孔剂烧结制得多孔 SiC 陶瓷的孔隙率在 53．34%～56．82%范围内，其抗弯强度为 14．86～17．47 MPa。(3)使用不同的造孔剂并未改变碳化硅陶瓷物相组成。
Porous silicon carbide ceramics with high porosity were prepared at low temperature by using ternary system Al 2 O 3 -Y 2 O 3 -SiO 2 as sintering aids of SiC powder，graphene，starch and flake graphite as pore forming agents．The effects of pore forming agents on the bulk density，porosity and bending strength of porous silicon carbide ceramics were discussed．The phase composition and microstructure of porous silicon carbide ceramics were analyzed．The results show that:(1)The pore forming effect of graphene in this system is better than that of starch and flake graphite，and the bending strength of porous SiC ceramics with graphene as pore forming agent is higher than that of porous SiC ceramics with flake graphite as pore forming agent，and lower than that of porous SiC ceramics with starch as pore forming agent．(2)Porous SiC ceramics sintered with different pore forming agents at 1 400 ℃ have a porosity of 53．34%～56．82% and a flexural strength of 14．86～17．47 MPa． (3)The use of different pore forming agents did not change the phase composition of silicon carbide ceramics．
解玉鹏 , 徐 俊 .
造孔剂对低温制备多孔 SiC陶瓷性能的影响
[J]. 大学物理实验, 2023, 36(1): 35-40.
XIE Yupeng , XU Jun .
Effect of Porator on Properties of Porous SiC Ceramics at Low Temperature
. Physical Experiment of College, 2023, 36(1): 35-40.
