Influence of different amount of Na2O additive on the structure, mechanical properties and degradability of bioactive wollastonite
Influence of different amount of Na2O additive on the structure, mechanical properties and degradability of bioactive wollastonite
复制标题
DOI：
10.1016/j.ceramint.2015.09.088
复制
发表时间：
2016
影响因子：
5.2
通讯作者：
H. C. Li;D. Wang;Chuanzhong Chen;F. Weng;H. Shi
中科院分区：
文献类型：
--
作者：
H. C. Li;D. Wang;Chuanzhong Chen;F. Weng;H. Shi
采用溶胶-凝胶法制备了不同Na 2 O含量（0、5、10、15和20mol%）的硅灰石（CaSiO 3）陶瓷。该陶瓷由β-CaSiO 3组成。随着Na_2 O含量的增加，出现了Na_2Ca_2Si_3 O_9、Na_4Ca_4Si_6 O_（18）和Na_2Ca_3Si_3 O_8等相。粒度分布服从正态分布。Na_2 O降低了硅灰石粉体的总孔容，提高了硅灰石陶瓷块体的显气孔率。Na_2 O提高了硅灰石的抗弯强度，所有陶瓷的弹性模量与人体松质骨的弹性模量相匹配。陶瓷的热膨胀系数（TEC）均接近钛合金（Ti6 Al 4V）。随着Na_2O含量的增加，降解速率加快。所有样品在模拟体液（SBF）溶液中均显示出磷灰石诱导的能力。
Wollastonite (CaSiO3) ceramics with various Na2O contents (0, 5, 10, 15 and 20 mol%) were successfully prepared by sintering sol–gel derived precursors. The ceramics are composed of β-CaSiO3. With increasing Na2O content, Na2Ca2Si3O9, Na4Ca4Si6O18and Na2CaSi3O8are observed. The particle size distribution obeys the normal distribution. Na2O decreases the total pore volume of wollastonite powder, and increases the apparent porosity of wollastonite ceramic block. Na2O increases the bending strength of wollastonite, and the elastic moduli of all ceramics match that of cancellous bone of human body. The thermal expansion coefficients (TECs) of the ceramics are all close to that of titanium alloy (Ti6Al4V). The degradation rate is increased with increasing Na2O content. All samples show the ability of apatite induction in simulated body fluid (SBF) solution.