Environmentally Friendly Growth of Calcium Chlorapatite Whiskers from a Sodium Chloride Flux
Environmentally Friendly Growth of Calcium Chlorapatite Whiskers from a Sodium Chloride Flux
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DOI：
10.1021/cg0603671
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发表时间：
2006-10
影响因子：
3.8
通讯作者：
Katsuya Teshima;K. Yubuta;S. Ooi;Takaomi Suzuki;T. Shishido;S. Oishi
中科院分区：
文献类型：
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作者：
Katsuya Teshima;K. Yubuta;S. Ooi;Takaomi Suzuki;T. Shishido;S. Oishi
采用氯化钠熔剂快速冷却的方法，选择性地制备了环保型、高质量、透明无色的氯磷灰石(Ca5Cl4)晶须。在1100℃加热溶质((NH4)2HPO4、CaCl2和CaCO3)和助熔剂(氯化钠)的混合物，在此温度下保温10h，然后以5−200°C h-1~500°C的速度冷却，生长的晶体分为针状和柱状两种形态。得到的Ca5Cl(PO4)3晶须平均长度可达4.2 mm，宽度可达130μm，其形状为具有锥形端面的六角形{1010}圆柱体。结晶形态和平均尺寸明显依赖于高温溶液的冷却速度。晶须的形成率随冷却速度的增加而增加，在200℃/h~(-1)温度下，晶须形成率远高于80wt%。结果表明，通过控制冷却速度，Ca5Cl(PO4)3晶须的生长占主导地位。最后，南汽。
Environmentally friendly, high-quality, and transparent-colorless calcium chlorapatite (Ca5Cl(PO4)3) whiskers were selectively fabricated by rapid cooling of a sodium chloride flux. The crystal growth was conducted by heating a mixture of solute ((NH4)2HPO4, CaCl2, and CaCO3) and flux (NaCl) at 1100 °C, holding at this temperature for 10 h, and then cooling it at a rate of 5−200 °C h-1 to 500 °C. The grown crystals were divided into two morphological types, that is, needle and prismatic shapes. The Ca5Cl(PO4)3 whiskers obtained average lengths up to 4.2 mm and widths up to 130 μm. Their form was a hexagonal {1010} cylinder with pyramidal {1011} end faces. The crystal forms and average sizes obviously depended on the cooling rate of the high-temperature solution. The formation ratio of the whiskers was increased with cooling rate, reaching much higher than 80 wt % at 200 °C h-1 in all growth runs. It is found that Ca5Cl(PO4)3 whiskers were predominantly grown by controlling the cooling rate. Finally, NaC...