R_2O-Al_2O_3-B_2O_3-SiO_2系统玻璃、超细α-Al_2O_3对羟基磷灰石陶瓷的烧结和相变的影响

Influences of R_2O-Al_2O_3-B_2O_3-SiO_2 System Glass and Superfine α-Al_2O_3 on the Sintering and Phase Transition of Hydroxyapatite Ceramics

系统地研究了 R2 O- Al2 O3- B2 O3- Si O2 系统玻璃和超细α- Al2 O3对羟基磷灰石 (HAP)陶瓷的烧结和相变及机械性能的影响。结果表明α- Al2 O3对 HAP的烧结有阻碍作用 ,使烧结温度提高 ;在烧结过程中能抑制玻璃与羟基磷灰石作用 ,使羟基磷灰石在烧结温度下避免脱去羟基而分解。同时使用超细α- Al2 O3和玻璃复合增强 HAP可以取得较好的效果 ,当α- Al2 O3含量为 10 % (wt) ,玻璃含量为 2 0 % (wt)时 ,在 12 0 0℃下烧结 1h可以获得弯曲强度高达 10 6 MPa的复相

The effects of R 2O Al 2O 3 B 2O 3 SiO 2 system glass and superfine α Al 2O 3 on the sintering and phase transition of hydroxyapatite (HAP) ceramics were assessed. The results showed thatα Al 2O 3 impeded the sintering of HAP and raised the sintering temperature. When glass and α Al 2O 3 were used together to reinforce HAP ceramics, better results could be obtained; the bending strength of multiphase HAP ceramics approached 106 MPa when 10% (wt)α Al 2O 3 and 20%(wt) glass were used and sintered at 1200 for 1h.