CAJ | 학술논문

以水为溶剂,采用铝粉、AlCl3? H 2 O、酸性硅溶胶为原料,通过溶胶-凝胶法制备了多晶莫来石纤维.借助 X 射线小角散射(SAXS)测试了 Al3＋的聚集形态,采用 XRD、SEM、HRTEM 等测试手段分析不同热处理温度下纤维的物相组成,纤维形貌,晶型结构等.X 射线小角散射的结果表明,Al3＋主要以 Al13(OH)25 Cl15的形态存在于聚合氯化铝溶胶中.纤维前驱体经1050℃热处理后主晶相为莫来石,随着温度升高至1200℃,晶相结构趋于完整,HRTEM 分析结果说明了纤维的多晶结构.
이수위용제,채용려분、AlCl3? H 2 O、산성규용효위원료,통과용효-응효법제비료다정막래석섬유.차조 X 사선소각산사(SAXS)측시료 Al3＋적취집형태,채용 XRD、SEM、HRTEM 등측시수단분석불동열처리온도하섬유적물상조성,섬유형모,정형결구등.X 사선소각산사적결과표명,Al3＋주요이 Al13(OH)25 Cl15적형태존재우취합록화려용효중.섬유전구체경1050℃열처리후주정상위막래석,수착온도승고지1200℃,정상결구추우완정,HRTEM 분석결과설명료섬유적다정결구.
The polycrystalline mullite fibers were prepared by sol-gel method,using aluminum powders,AlCl3 ?H 2 O and acidic silica sol as raw materials,deionized water as solution.The aggregation state of Al3 + was tested by SAXS.The phase composition,fiber morphology,crystalline structure of mullite fibers by heated to differ-ent temperature were analyzed by XRD,SEM and HRTEM.The results of SAXS show that Al3 + ions aggregate in the PAC sol exists in the form of Al1 3 (OH)2 5 Cl1 5 .XRD and SEM analysis show that the main crystal phase was mullite at 1 050 ℃.The crystal phase structure tends to be complete after heated to 1 200 ℃.The results of HRTEM show that polycrystalline structure of fiber.