采用水热-热分解法,以表面活性剂聚乙二醇(PEG-6000)作为模板导向剂,尿素作为沉淀剂,硝酸铝作为铝源,水热制备出碳酸铝铵(AACH)纤维,经过洗涤、抽滤、干燥、煅烧分解得到具有一定长径比的氧化铝纤维.通过改变反应温度,利用傅里叶红外光谱仪(FT-IR)、同步热分析仪(TG-DSC)、扫描电子显微镜(SEM)和电子能谱仪(EDS)对样品形貌、结构进行表征.实验结果表明,在水热反应温度为200℃时,得到AACH纤维,直径为80～100nm左右,长径比在20～25之间.经过1300℃煅烧后,得到与AACH形貌相同的氧化铝(Al2O3)纤维,其直径大约在80 nm,长径比分布在30～35之间.
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