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Effects of synthesis techniques and initial reagents on compositions and particle morphology of hydroxyapatite

机译：合成技术与初始试剂对羟基磷灰石组合物和颗粒形态的影响

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Hydroxyapatite (Ca_(10)(PO_4)_6(OH)_2, HAp), a material commonly used in bone grafting can be synthesized using simple and cost-effective ceramic processing methods, such as through solid-state reaction or through solution combustion techniques. This study was aimed at synthesizing hydroxyapatite using those techniques, as well as at examining the effects of initial reagents (Ca/P ratios) on chemical compositions and morphology of hydroxyapatite particles. Experimental results indicated that powders synthesized by either of the methods contained hydroxyapatite and calcium oxide phases. However, an additional tricalcium phosphate phase (Ca_3(PO_4)_2, TCP) was observed in powder synthesized through solution combustion technique. The results have also shown that varying Ca/P ratios (1.7 and 2.3) did not significantly alter the synthesized powder's chemical compositions. Microstructural examination revealed that all synthesized powders were comprised of spherical particles of sizes ranging from 1.38 to 1.79 micrometers. Although neither synthesis technique nor Ca/P ratio affected particle size, the synthesis technique did affect morphology. While the de-agglomerated spherical particles were evident in powders synthesized by the solution combustion technique, inter-particle necking was clearly visible in powders synthesized by the solid-state reaction technique.
机译：羟基磷灰石（CA_（10）（PO_4）_6（OH）_2，HAP），在骨移植中通常使用的材料可以使用简单和成本有效的陶瓷加工方法，如通过固相反应或通过溶液燃烧技术合成。此研究的目的是使用这些技术合成的羟基磷灰石，以及在检查上的化学组成和羟基磷灰石颗粒的形态初始试剂（Ca / P的比）的影响。实验结果表明，由任一方法合成的粉末载羟基磷灰石和氧化钙相。但是，在通过溶液燃烧技术合成粉末，观察到一个额外的磷酸三钙相（CA_3（PO_4）_2，TCP）。结果还表明，改变Ca / P的比（1.7和2.3）没有显著改变合成粉末的化学组成。显微组织检查发现，所有合成粉末是由尺寸范围从1.38至1.79微米的球形颗粒组成。虽然既不合成技术也不Ca / P比的影响颗粒大小，合成技术确实影响的形态。虽然解附聚的球形颗粒在通过溶液燃烧技术合成粉末是显而易见的，颗粒间的颈缩是在由固态反应技术合成的粉末清晰可见。

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