CAJ | 학술논문

本文主要对微孔型HAp基生物材料的制备工艺及成孔机制进行了初步研究.研究发现,经冷压成型、等静压成型后的坯体再用无压烧结可制得孔径不等的微孔型HAp-ZrO2复合材料.在成型压力、烧结温度及保温时间都相同的条件下,添加剂与纳米氧化锆含量越高复合材料的强度越低,但其最低弯曲强度也达到23MPa,大大高于已报道的多孔型材料.添加剂及纳米ZrO2的加入量是材料中孔径大小及孔隙率高低的关键因素,而成型方式、烧结温度及保温时间因素对其也有影响.
본문주요대미공형HAp기생물재료적제비공예급성공궤제진행료초보연구.연구발현,경냉압성형、등정압성형후적배체재용무압소결가제득공경불등적미공형HAp-ZrO2복합재료.재성형압력、소결온도급보온시간도상동적조건하,첨가제여납미양화고함량월고복합재료적강도월저,단기최저만곡강도야체도23MPa,대대고우이보도적다공형재료.첨가제급납미ZrO2적가입량시재료중공경대소급공극솔고저적관건인소,이성형방식、소결온도급보온시간인소대기야유영향.
In this paper, the authors studied the preparation and the mechanism of producing pores on tiny porous HAp based biomaterial.At first, the multiplex powder was moulded by cold pressing and isostatic pressing; then, the samples were sintered at 1200℃ for about 3h in air and the tiny porous HAp-ZrO2 composites with different pores were obtained. When the moulding pressure, sintering temperature and keeping temperature time are all the same, the flexural strength of the composite is becoming lower with the increase of additive and nano-zirconia contents. But the lowest value of flexural strength is still about 23MPa which is much higher than that of the porous hydroxyapatite in literatures. The added quantity of additive and nano-zirconia is the key factor which influences the diameter and ratio of pores in the composite. Other factors, such as moulding mode, sintering temperature and the time of keeping temperature, can influence them too.