载银羟基磷灰石抗菌粉体和陶瓷的制备及抗菌性能

采用水热法一步合成载银羟基磷灰石抗菌粉体(Ag-HA),并将其应用于抗菌陶瓷的制备。研究结果表明水热条件下HA实际载银量与AgNO₃加入量存在较好的线性关系。XRD和TEM分析结果显示Ag-HA与HA具有相同的晶体结构,水热条件下Ag⁺取代Ca²⁺在HA晶体中的位置,生成Ag_xCa_10-x(PO₄)₆(OH)₂。Ag-HA长度随Ag⁺掺入量的增加而增大,当Ag⁺掺入量增加至1.50%时,Ag-HA由棒状生长为晶须状。选择4.50% Ag-HA作为抗菌粉体,其掺入量为9wt%时,陶瓷的抗菌率>99.9%,此时釉料中Ag₃PO₄含量为0.56%,低于目前研究中釉料中Ag₃PO₄添加量(2wt%~4wt%),不但在一定程度上解决了抗菌陶瓷产品成本较高的问题,而且满足JC/T 897-2002(抗菌陶瓷制品抗菌性能)对抗菌陶瓷抗菌性能的要求。

Preparation and Antibacterial Property of Ag-Doped Hydroxyapatite Antibacterial Powders and Antibacterial Ceramic

Silver doped hydroxyapatite antimicrobial powders were synthesized by one-step reaction, then it was used for preparing antibacterial ceramic. The experimental results show that there was a significant linear correlation between silver content of HA and quantity of silver nitrate at hydrothermal condition. The XRD patterns and TEM photos indicate that HA and Ag-HA have the same crystal structure, and Ca²⁺ in HA crystals is displaced by Ag⁺ and Ag_xCa_10-x(PO₄)₆(OH)₂ was produced at hydrothermal condition. The length of Ag-HA antimicrobial powders increases with the increase of content of Ag⁺ in Ag-HA. Ag-HA antimicrobial powders went from sticks to whisker when the contents of Ag⁺ in Ag-HA exceeds 1.5%. 4.50% Ag-HA was selected as antimicrobial powders, an antibacterial rate of antibacterial ceramic is above 99.9%. and at this point, the mass fraction of Ag₃PO₄ in antimicrobial tglazes is 0.56%, which was far below 2wt%~4% of Ag₃PO₄ in antimicrobial tglazes of ongoing research. This technology can not only reduce the cost of producing antibacterial ceramic, but also meet JC/T 897-2002 demands for antibacterial properties of antibacterial ceramic.