CAJ | 학술논문

以硝酸钙、磷酸氢二铵混合水溶液为原料、以尿素为缓冲剂，采用均相共沉淀法制备羟基磷灰石晶体，并通过X射线衍射、扫描式电子显微镜、透射电子显微镜等3种分析方法对样品分别进行了物相组成、晶体形貌、晶体取向的表征，研究了不同压力对羟基磷灰石晶体形貌的影响．结果表明：当反应压力从0．11 M Pa增加至1．1 M Pa时，所得羟基磷灰石晶体的物相组成由含有羟基磷灰石和磷酸八钙两种物相向只含有羟基磷灰石一种物相过渡；所得羟基磷灰石晶体的形貌从针状晶须（经由长板状和六方柱状）向薄片状晶体进行过渡；所得羟基磷灰石晶体的生长取向由沿一个方向（c轴）生长向沿另外两个方向（a轴和b轴）生长转变．
이초산개、린산경이안혼합수용액위원료、이뇨소위완충제，채용균상공침정법제비간기린회석정체，병통과X사선연사、소묘식전자현미경、투사전자현미경등3충분석방법대양품분별진행료물상조성、정체형모、정체취향적표정，연구료불동압력대간기린회석정체형모적영향．결과표명：당반응압력종0．11 M Pa증가지1．1 M Pa시，소득간기린회석정체적물상조성유함유간기린회석화린산팔개량충물상향지함유간기린회석일충물상과도；소득간기린회석정체적형모종침상정수（경유장판상화륙방주상）향박편상정체진행과도；소득간기린회석정체적생장취향유연일개방향（c축）생장향연령외량개방향（a축화b축）생장전변．
Hydroxyapatite crystal was prepared by homogeneous co‐precipitation method using a mixture of Calcium nitrate and diammonium phosphate as raw materials and carbamide as buffering agent .To analyze the influence of pressure on hydroxyapatite crystal morphology ,the phase composition ,crystal morphology and growth orientation were characterized by X‐ray diffraction ,scanning electron micro‐scope and transmission electron microscope respectively .T he results show that w hen the reaction pres‐sure increases from 0 .11 M Pa to 1 .1 M Pa ,the phase composition of the hydroxyapatite crystals trans‐forms from the two phases of hydroxyapatite and eight calcium phosphate to hydroxyapatite single crys‐tal;the morphology of the hydroxyapatite crystals transforms from acicular crystal whisker (via long plate shape and hexagonal prism shape ) to lamelliform crystal ; the grow th orientation of the hydroxyapatite crystals changes from growing along one dimension (c axis) to growing along the others two dimensions (a axis and b axis) .