以固废磷化渣和NaOH为原料制得Na3PO4,再在超声波辅助下,采用化学沉淀法将Na3PO4溶液缓慢滴加到Ca(OH)2溶液中反应制备出纳米羟基磷灰石,并用FTIR、XRD和SEM等手段对羟基磷灰石进行表征分析。结果表明,在常温和超声波辅助条件下,Na3PO4溶液滴加速度为0.3 mL/min时,用无水乙醇洗涤沉淀物,可获得质量分数达99.5%、粒径为50 nm左右的高结晶度和高分散性纳米羟基磷灰石。 Solid waste phosphogypsum and NaOH as raw materials to obtain Na3PO4, and then with the aid of ultrasound, the chemical precipitation method Na3PO4 solution was slowly added dropwise to the Ca (OH) 2 solution to prepare nano-hydroxyapatite reaction and FTIR, XRD and SEM were used to characterize hydroxyapatite. The results showed that under the conditions of normal temperature and ultrasonic wave, when the dropping rate of Na3PO4 solution was 0.3 mL / min, the precipitate was washed with absolute ethanol to get high crystallinity and high content of 99.5% Dispersible nano-hydroxyapatite.