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以Ca(CH_3COO)_2·H_2O、KH_2PO_4和KF·2H_2O为原料,室温下采用化学沉淀法在p H为7的条件下制备得到氟化羟基磷灰石(FHA)。通过对不同氟含量的FHA进行XRD、FTIR等手段分析,结果表明加入F不会改变FHA晶体结构,但晶格参数a减小;F取代HA中的OH,随着F加入量增大,F取代OH难度增加;在FHA中形成氢键OH…F,约束晶胞规则有序生长,使FHA的结晶性提高;HA中原有的长程有序排列…HOHOHO…逐渐转变为F和OH的间隔性排列…F(HO)_nF…;FHA晶体形态为短棒状,长度约为150 nm,直径约为20 nm,随F含量增加,FHA晶粒直径增大。
Fluorinated hydroxyapatite (FHA) was prepared by chemical precipitation at pH 7 with Ca (CH 3 COO) 2 · H 2 O, KH 2 PO 4 and KF · 2H 2 O as raw materials. The results of XRD and FTIR analysis showed that the addition of F did not change the crystal structure of FHA, but the lattice parameter a decreased. F replaced the OH in HA, and with the increase of F, F The degree of substitution of OH increases; the formation of hydrogen bonds in the FHA OH ... F, constraining the orderly growth of unit cells so that the crystallinity of the FHA; HA original long-range order ... HOHOHO ... gradually into F and OH interval Arranged in ... F (HO) _nF ...; FHA crystals were short rods with a length of about 150 nm and a diameter of about 20 nm. With the increase of F content, the diameter of FHA grains increased.