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Single crystalline calcium chloroborate(Ca_2B_5O_9Cl) whiskers with uniform diameter have been fabricated by a two-step process. The precursor was firstly prepared by the sedimentation reaction between CaCl_2, H_3BO_3 and Na OH aqueous solutions, and then sintered at different temperatures for 6 h with KCl as flux. The XRD indicates that the product synthesized at 600 °C is Orthorhombic Ca_2B_5O_9Cl. SEM and TEM results show that the Ca_2B_5O_9Cl is whisker with the diameter about 0.2-0.5 μm and the length up to 15 μm. SAED analysis shows that the whisker is single crystalline and grows along [001] direction. The possible formation process and growth mechanism were proposed.
Single crystalline calcium chloroborate (Ca_2B_5O_9Cl) whiskers with uniform diameter have been fabricated by a two-step process. The precursor was prepared by the sedimentation reaction between CaCl_2, H_3BO_3 and Na OH aqueous solutions, and then sintered at different temperatures for 6 h with KC as flux. The XRD indicates that the product synthesized at 600 ° C is Orthorhombic Ca_2B_5O_9Cl. SEM and TEM results show that Ca_2B_5O_9Cl is whisker with the diameter about 0.2-0.5 μm and the length up to 15 μm. SAED analysis shows that the the whisker is single crystalline and grows along [001] direction. The possible formation process and growth mechanism were proposed.