纳米羟基磷灰石的新型超声喷雾法制备技术研究

Preparation of Nano-hydroxyapatite by Novel Ultrasonic Atomization Precipitation Method

在常温常压下，以硝酸钙（Ca（NOs）2·4H2O）和磷酸氢二铵（（NH4）2HPO4）为原料，运用超声喷雾法技术制备了羟基磷灰石（HAP）纳米粉体，获得了颗粒度为30-40nm的均匀HAP粉体。研究了化学反应时间与烧结温度对HAP的结晶度和颗粒均匀性的影响规律。在相同的制备工艺条件下，与传统的超声化学法和化学沉淀法制得的HAP粉体样品进行比较，发现超声喷雾法可以在较短的反应时间内制备出纳米HAP，显著提高HAP的合成效率、结晶度，且获得的颗粒度相对均匀。

At room temperature and normal atmospheric pressure, the hydroxyapatite nano-powders were prepared by ultrasonic atomization precipitation method and with Ca （NO3）2 4H2O and （NH4）2HPO4 as raw materials. The obtained powders were homogenous and in size of 30-40nm. The effects of the reaction time, the sintering temperature on the crystal morphology of HAP and homoge- neity were investigated. The obtained HAP powders were compared with those synthesized by the conventional ultrasonic method and traditional chemical precipitation method under the same condi- tions. The results revealed that the method taken in the experiment can shorten reaction time to make HAP nano-powders, enhance the synthetic efficiency effectively and crystallinity of HAP nanopowders in a relatively short reaction period, moreover, the obtained nano-particles were more homogenous.