As a key fundamental strengthening-softening material,single crystal sapphire fiber can be widely used in ceramic,metal,and polymer based composite materials.Using vapor-liquid-solid (VLS) deposition reaction mechanism,single crystal sapphire fiber was prepared with SiO2 powders and aluminum bar as raw materials,argon as protective atmosphere and ZrO2 ceramics as setter plate.SEM,XRD,HRTEM and EDS were performed to analyze the morphology,structure and element.The results indicated that the fiber was smooth and true and the average diameter was about 0.5～1μm.The Al2O3 fiber was single crystal α-phase before and after purification and there was no impurity present in the fiber after purification.The main lattice planes were comprised of (104),(110) and (006).Next,VLS growth mechanism and process of single crystal sapphire fiber was studied.The results layed an experimental foundation for the extensive and controllable preparation and application of single crystal sapphire fiber.
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基金资助
国家国际科技合作专项资助(2014DFA53020);深圳市基础研究计划项目(JCYJ20170816152011392);国家自然科学基金项目(51302150)
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