CAJ | 학술논문

为了改善以木炭为造孔剂的多孔莫来石陶瓷的性能，以烧结莫来石（0．25～0．3 mm）、SiO2微粉、Al2 O3微粉、滑石粉、球黏土、膨润土、甲基纤维素、木炭粉（≤0．044 mm）为原料，研究了不同量的木炭粉（外加质量分数分别为0、2％、4％、6％、8％、10％、12％）对多孔莫来石坯体的成型外观、烘干后的常温耐压强度及1400℃保温3h热处理后的显气孔率和常温耐压强度的影响，并对不同木炭添加量的多孔莫来石试样进行了显微结构分析。结果表明：外加质量分数≤8％的木炭，制成的多孔莫来石坯体可较好成型；外加质量分数2％～8％木炭的莫来石坯体与不添加木炭的相比，烘干后试样的常温耐压强度明显提高；多孔莫来石热处理后的显气孔率随着木炭添加量的增加而增加，常温耐压强度随之降低。综合考虑多孔莫来石陶瓷各项性能，木炭外加质量分数不宜超过8％。
위료개선이목탄위조공제적다공막래석도자적성능，이소결막래석（0．25～0．3 mm）、SiO2미분、Al2 O3미분、활석분、구점토、팽윤토、갑기섬유소、목탄분（≤0．044 mm）위원료，연구료불동량적목탄분（외가질량분수분별위0、2％、4％、6％、8％、10％、12％）대다공막래석배체적성형외관、홍간후적상온내압강도급1400℃보온3h열처리후적현기공솔화상온내압강도적영향，병대불동목탄첨가량적다공막래석시양진행료현미결구분석。결과표명：외가질량분수≤8％적목탄，제성적다공막래석배체가교호성형；외가질량분수2％～8％목탄적막래석배체여불첨가목탄적상비，홍간후시양적상온내압강도명현제고；다공막래석열처리후적현기공솔수착목탄첨가량적증가이증가，상온내압강도수지강저。종합고필다공막래석도자각항성능，목탄외가질량분수불의초과8％。
Sintered mullite(0.25 -0.3 mm),SiO2 micropowder,Al2 O3 micropowder,talc powder,ball clay, amargosite,methylcellulose and charcoal powder(≤0.044 mm)were used as main starting materials to im-prove the properties of porous mullite ceramics with charcoal powder as the pore former.The influences of charcoal powder addition (extra-added 0,2%,4%,6%,8%,10%and 12%,respectively,in mass,the same hereinafter)on moldability of green bodies,CCS of dried specimens,CCS and AP of specimens treated at 1 400 ℃for 3 h were studied,and the microstructure of porous mullite specimens was analyzed.The results show that:the mullite green bodies with ≤8% charcoal powder has good moldability;compared with the specimens without charcoal powder,CCS of the dried specimens with 2%-8%charcoal powder improves obviously;with the charcoal powder increasing,the AP of the heat-treated specimens increases and CCS decreases.Thus,the appropriate charcoal addition in porous mullite ceramics shall not be more than 8%.