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im Koetz, Korn elia Gaw litza, Sab ine Kosm el la. Form ation ofan ically and in an ically passivated CdS nanopart icles in reverse m icroem u ls ion s [ J ] . Co lloid Polym. S , 20xx, 288( 3) :257 263. [11]K othapal liC, W eiM, Vas iliev A, et In flu ence of tem perature and con cen tration on the s intering b ehavior andm echan ical propert ies of hyd roxyapat ite [ J ] . A cta M ateria lia, 20xx, 52 ( 19) :5655 5663. [12]Sadat ShojaiM, AtaiM, Nodeh iA, et H yd roxyapat ite nanorodsas novel fillers for im proving the p roperties of den tal adhesives:Syn thesis and appl icat ion [ J ] . Den t. Mater. , 20xx, 26 ( 5) :471 482. [13]L in Runrong, Mao Xuan, Yu Q icong, et Preparat ion of b ioact ivenano hydroxyapatite coat ing for artificial cornea[ J] . C urren tApp lied Physics, 20xx, 7 ( 1) : 85 89. [14]Fath iM H, H an ifiA, M ortazaviV. P reparation and b ioactiv ity evaluation of bone like hyd roxyapat ite nanopow der[ J] . Jou rnal ofM aterials Process ing T echnology, 20xx, 202( 1 /2 /3) : 536 542. [15]H anY ingchao, Li Sh ipu, Wang X inyu. A novel th erm olys is m ethod of colloidal protein p recu rsors to prepare hydroxyapatite nanocrystals[ J]. C ryst. Res. Techn , 20xx, 44 ( 3) : 336 340. [16]鄭昌瓊 , 冉均國 , 彭少方等 . 無機生物材料 [J]. 成都 : 四川大學(xué)出版社 , 1996: 20~ 21. [17]郭廣生 , 孫玉繡 , 王志華 , 等 . 納米級羥基磷灰石粒子的可控制備 [ J] . 北京化工大學(xué)學(xué)報 , 20xx, 31 ( 4) : 78 81. [18]Bouyer E, G itzhofer F, Bou losM I. M orph olog ica l study of hyd roxyap at ite nanocrystal susp ension [ J] . Journal of Materials Science: M aterials inM ed icine, 20xx, 11 ( 8) : 523 531. [19]Pang Y X, Bao X. In fluen ce of temp erature, rip en ing t im e and calcinat ion on them orph ology and crystallin ity of hyd roxyapat ite n anopart icles [ J ]. Jou rnal of the E uropean C eram ic Society, 20xx,23( 10) : 1697 1704. Legal research chemical precipitation of hydroxyapatite structure XiaXin (Leshan Normal University School of professional electric materials, Sichuan Province, Leshan 614000) Abstract:In order to quickly and easily obtain high purity hydroxyapatite, this study (NH4) 2HPO4 and Ca (NO3) H2O as raw material, the use of chemical precipitation of hydroxyapatite powder prepared according to certain molar ratio of calcium and phosphorus were dissolved after the mixture of ethanol and aqueous ammonia to form a solution, then add a dispersing agent, a magic stirrer and a water bath after aging, then the hightemperature calcination, hydroxyapatite powder was prepared. After the tablet with a Fourier transform infrared spectrometer to analyze samples for testing optical microscope and surface morphology. The results showed that: this method can be dispersed, good uniformity, high purity, small particles, crystalline hydroxyapatite plete. Key