【摘要】 采用溶胶-凝胶法,以醋酸钡、醋酸钙和钛酸丁酯为原料,冰醋酸为催化剂,制备了钙掺杂钛酸钡陶瓷纤维。发现当钙的掺杂量物质的量分数为0.05,0.10,0.15,0.20,0.25时溶胶具有可纺性,掺杂量物质的量分数为0.30,0.35时能形成溶胶,但溶胶不具有可纺性,掺钙量物质的量分数为0.40时不能形成溶胶。应用热分析、X射线粉末衍射、红外和扫描电子显微镜等技术对凝胶和纤维进行了较系统地研究。在1 000℃煅烧60min,升温速率为2℃/min时,得到表面形貌良好的陶瓷纤维。更多还原

【Abstract】 The Ca doped BaTiO3 ceramic fibers were prepared by sol-gel process with Ba(CH3COO)2,Ca(CH3COO)2 and Ti(OC4H9)4 as precursors and CH3COOH as the catalyst.It is found that the sols are spinnable with Ca contents of 0.05,0.10,0.15,0.20,0.25(amount fraction),while not spinnable with 0.30 and 0.35 Ca contents,failing to form the sol of 0.40 Ca contents.A series of researchs were carried out with TGA-DTA,XRD,FT-IR,SEM.Ceramic fibers with perfect surface were obtained under calcined time of 60 minutes held on 1 000℃,at 2℃/minute rate.更多还原