CAJ | 학술논문

以煅烧氧化铝粉、柠檬酸铵、十二烷基硫酸三乙醇胺、丙烯酰胺、N，N’-亚甲基双丙烯酰胺、过硫酸铵、N，N，N’，N’-四甲基乙二胺、硅溶胶、氯化铵、铝酸钙水泥、聚丙烯酰胺为原料，采用发泡法造孔原理，分别结合凝胶注模工艺、溶胶凝胶工艺和水泥固化工艺三种不同的固化成型方法，制备了新型Al2 O3基多孔陶瓷隔热材料。结果表明：三种方法所制备试样的烧后收缩率在11．5％～12．8％，体积密度在0．70～0．75 g·cm-3，显气孔率在80．2％～82．0％，差别较小；凝胶注模工艺制备的多孔陶瓷为纯相的α-Al2 O3，溶胶凝胶工艺制备的多孔陶瓷还有少量莫来石，水泥固化工艺制备的多孔陶瓷还有少量六铝酸钙相；三种方法制备的多孔陶瓷的结构非常相似，都为明显的球形孔结构，且其耐压强度和热导率差别也不大，但耐压强度比目前高温隔热常用的Al2 O3多晶纤维板明显要高，热导率与Al2 O3多晶纤维板的相近。
이단소양화려분、저몽산안、십이완기류산삼을순알、병희선알、N，N’-아갑기쌍병희선알、과류산안、N，N，N’，N’-사갑기을이알、규용효、록화안、려산개수니、취병희선알위원료，채용발포법조공원리，분별결합응효주모공예、용효응효공예화수니고화공예삼충불동적고화성형방법，제비료신형Al2 O3기다공도자격열재료。결과표명：삼충방법소제비시양적소후수축솔재11．5％～12．8％，체적밀도재0．70～0．75 g·cm-3，현기공솔재80．2％～82．0％，차별교소；응효주모공예제비적다공도자위순상적α-Al2 O3，용효응효공예제비적다공도자환유소량막래석，수니고화공예제비적다공도자환유소량륙려산개상；삼충방법제비적다공도자적결구비상상사，도위명현적구형공결구，차기내압강도화열도솔차별야불대，단내압강도비목전고온격열상용적Al2 O3다정섬유판명현요고，열도솔여Al2 O3다정섬유판적상근。
New type heat insulation materials of alumina based porous ceramics were prepared via foaming method as pore-forming mechanism combined with gel-casting,sol-gel or cement curing process,using calcined alumina powder,ammonium citrate,triethanolamine lauryl sulfate,acrylamide,N,N’-methylenebi-sacrylamide,ammonium persulfate,N,N,N’,N’-tetramethylethylenediamine,silica sol,ammonium chlo-ride,calcium aluminate cement,polyacrylamide as starting materials.The results show that the properties differences of the prepared specimens by the three methods are small:shrinkage after firing is between 1 1 .5%-12.8%,bulk density is between 0.70 -0.75 g · cm -3 ,apparent porosity is between 80.2% -82.0%;porous ceramics prepared by gel-casting only contain pure α-Al2 O3 phase,those by sol-gel con-tain a small amount of mullite besides α-Al2O3,and those by cement curing contain a small amount of hexaluminate besides α-Al2 O3;the ceramics have similar structures with obvious spheric pores,compres-sive strength and thermal conductivity.Compared with the current heat insulation polycrystalline alumina fi-ber sheet,they have higher compressive strength and similar thermal conductivity.