锌掺杂对β-磷酸三钙晶体结构和分子结构的影响  

Effect of the Substitution of Zinc on the Microstructure of β-Tricalcium Phosphate

作　　者：冯祖德[1] 金浦[1] 宓锦校[1] 邱星屏[1] 

机构地区：[1]厦门大学材料科学与工程系,厦门361005

出　　处：《无机材料学报》2003年第2期475-479,共5页Journal of Inorganic Materials

基　　金：国家计委科研项目;福建省自然科学基金(E0010003)

摘　　要：采用液相方法合成系列比例掺杂锌的磷酸三钙微粉,并利用多晶转靶X射线衍射仪和傅立叶变换红外光谱仪研究所得产物的相组成、晶体结构和分子结构的变化规律.研究结果表明,掺杂锌比例在20 atom％以下的产物为锌在磷酸三钙中的置换固溶体.当掺杂锌的比例继续增高,出现α-CaZn2(PO4)2相.晶格常数测定表明,掺杂锌含量<10atom％时,β-TCP的a(b)轴和c轴随掺杂锌含量的增大均呈现线性减小.然而当掺杂锌含量超过10％以后,c轴随掺杂锌的继续增加反而变大.红外光谱研究表明,β-TCP的P-O键的伸缩振动峰和O-P-O键的弯曲振动峰的位置也随掺杂锌含量的增加而呈线性变化.X-ray diffraction and infrared absorption analysis were carried out on zinc-doped beta-tricalcium phosphate prepared by a liquid-phase reaction technique. Quantitative methods and regression analysis were used to calculate the variation of lattice constants of TCP, and the shift or degeneracy of the PO43- infrared absorption bands. X-ray diffraction analysis indicates that zinc can substitute calcium up to 20 atom %, inducing a statistically significant decrease of the lattice constants a and b. As the zinc content in TCP increases beyond 20 atom %, X-ray diffraction analysis shows the appearance of a new phase α-CaZn2(P04)2. However, the effect of substitution of zinc on the lattice constant c is abnormal. The substitution of Zn up to 10 atom % results in a general decrease of the lattice constants c, while it increases as the content of zinc in TCP increases beyond 10%. FTIR spectra reveal that the substitution of Zn up to 10 atom% results in a statistically significant increase of the asymmetric P-O stretching vibration absorption band at 1045 and 1120cm-1 (P <0.05) and a statistically significant decrease of O-P-O bending vibration absorption band at 605cm-1 (P=0.00085), respectively.

关 键 词：磷酸三钙 锌 掺杂 

分 类 号：O614[理学—无机化学] Q819[理学—化学]