【摘要】 用异丙醇铝为先驱体通过溶胶-凝胶工艺成功地在SiC晶须表面涂覆了5—30nm的Al₂O₂涂层。认为SiC表面与Al（OC₂H₇）₂（OH）形成配位键并构成胶团是形成涂层的重要机制。研究了溶胶浓度、晶须预处理,晶须直径和反复涂层对涂层效果的影响。更多还原

【Abstract】 The Al₂O₃ coating of of 5—30nm thickness, measured by TEM and EDAX, on the surface of SiC whisker was successfully prepared by sol-gel processing using Al（OC₃H₇）₃ as a precursor. The influences of sol concentration, surface pretreating techniques and coating times on QV（volume of coating per unit volume of whisker）are investigated. It is suggested that covalent bond between SiC and Al₂O₃ on the interface and formation of colloidal group in SiC-Al（OC₂H₇）₂（OH）-CH₂OH-H₂O system are the important mechanism of coating.更多还原