稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
362-365
,共4页
刘伟渊%汪长安%周立忠%黄勇
劉偉淵%汪長安%週立忠%黃勇
류위연%왕장안%주립충%황용
冷冻-凝胶成形%定向通孔%氧化铝%性能
冷凍-凝膠成形%定嚮通孔%氧化鋁%性能
냉동-응효성형%정향통공%양화려%성능
freeze-gel casting%directional pore channels%alumina%properties
由叔丁醇、氧化铝、丙烯酰胺组成的20%(体积分数,下同)陶瓷浆料,在温度梯度的诱导下,用冷冻-凝胶成形法制备了具有定向通孔结构的氧化铝陶瓷坯体.经过烧结后,制备出了高孔隙率、高强度的定向通孔陶瓷,50%气孔率的陶瓷体具有110 MPa的轴向压缩强度.还研究了距离冷端不同位置孔隙的孔径、开孔率变化规律.
由叔丁醇、氧化鋁、丙烯酰胺組成的20%(體積分數,下同)陶瓷漿料,在溫度梯度的誘導下,用冷凍-凝膠成形法製備瞭具有定嚮通孔結構的氧化鋁陶瓷坯體.經過燒結後,製備齣瞭高孔隙率、高彊度的定嚮通孔陶瓷,50%氣孔率的陶瓷體具有110 MPa的軸嚮壓縮彊度.還研究瞭距離冷耑不同位置孔隙的孔徑、開孔率變化規律.
유숙정순、양화려、병희선알조성적20%(체적분수,하동)도자장료,재온도제도적유도하,용냉동-응효성형법제비료구유정향통공결구적양화려도자배체.경과소결후,제비출료고공극솔、고강도적정향통공도자,50%기공솔적도자체구유110 MPa적축향압축강도.환연구료거리랭단불동위치공극적공경、개공솔변화규률.
By the method of freeze-gel casting, with inducement of temperature gradient, a solid loading of 20vol% slurry constituted of tert-butyl alcohol, acrylamide and alumina powder was used to fabricate porous alumina ceramics green bodies with directional pore channels structure. After sintering, porous alumina ceramics with directional pore channels, high porosity and high compressive strength were obtained. The axial compressive strength reaches 110 MPa when the porosity is 50%. Pore diameters and open porosities in different freeze positions were also investigated.
