摘要
采用活性炭辅助微波烧结的方法制备多孔碳酸化磷酸钙纳米陶瓷。通过考察多孔陶瓷坯体在不同烧结温度的线收缩率和抗压强度得到合适的烧结温度。1000℃微波烧结得到多孔碳酸化磷酸钙纳米陶瓷：抗压强度约为2.5MPa,平均晶粒尺寸约为132nm,孔隙率约为75%。与常规陶瓷相比,该种陶瓷抗压强度相当、晶粒尺寸更小并且微观结构更均匀,并降低了烧结温度约100℃。结果表明：活性炭不仅有利于辅助磷酸钙陶瓷微波升温,还有利于引入碳酸根,为制备A型碳酸化羟基磷灰石纳米陶瓷提供了新思路。动物骨内植入的初步实验表明这种新型材料较常规材料具有更优的生物活性。
A microwave sintering method with activated carbon as embedding material was applied to prepare porous carbonated hydroxyapatite nanoceramics （CHA）. By examining linear shrinkages and compressive strengths of samples at different temperatures, a suitable microwave sintering temperature was achieved. The compressive strength of CHA is about 2.5 MPa, the grain size is about 132 nm and porosity is about 75% at the microwave sintering temperature of 1 000 ℃. Compared with the samples prepared by con- ventional sintering method, the CHA bioceramics prepared by the proposed microwave sintering approach show a compressive strength similar to the conventional ones, and have smaller grain size, more uniform microstructure, and a sintering temperature as low as about 100 ℃. Results suggest that activated carbon not only preheats hydroxyapatite but also introduces carbonate groups to hydroxyapatite crystal, which provides a new research direction for the preparation of A-type CHA with a nanostructure. The in vivo tests on mongrel dogs show higher bioactivity of nano A-type CHA compared to general HA.
作者
李波
廖晓玲
朱向东
范红松
张兴栋
LI Bo 1,2,3 ,LIAO Xiaoling 1,2 ,ZHU Xiangdong 3 ,FAN Hongsong 3 ,ZHANG Xingdong 3 （1. Institute of Biomaterials and Living Cell Imaging Technology; 2. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331; 3. National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China）
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
Journal of The Chinese Ceramic Society
关键词
羟基磷灰石
微波烧结
纳米碳酸化
活性炭
hydroxyapatite
microwave sintering
nano carbonated
activated carbon
