微波烧结温度对ZrO_(2)陶瓷复合材料微观结构及增韧机理研究  

Effect of microwave sintering temperature on microstructure and toughening mechanism of ZrO_(2)ceramic composites

作　　者：李杨 卢红巧 周灵 欧阳丽君 付莹欣 王柏力 LI Yang;LU Hongqiao;ZHOU Ling;OUYANG Lijun;FU Yingxin;WANG Baili(Affiliated Stomatology Hospital of Zunyi Medical University,Zunyi 563000,China;Colledge of Stomatology,Zunyi Medical University,Zunyi 563000,China)

机构地区：[1]遵义医科大学附属口腔医院,贵州遵义563000 [2]遵义医科大学口腔医学院,贵州遵义563000

出　　处：《功能材料》2023年第6期6167-6171,6193,共6页Journal of Functional Materials

基　　金：贵州省卫生健康委科学技术基金(gzwkj2021-352);遵义市科技计划项目([2022]428号);大学生创新训练项目(ZYDC2021054)。

摘　　要：ZrO_(2)陶瓷具有高强度和高韧性的特点,在口腔修复材料方面具有广泛应用。以8%(摩尔分数)Y_(2)O_(3)为稳定剂,Al_(2)O_(3)为添加相,制备了ZrO_(2)陶瓷复合材料,研究了1300~1450℃微波烧结温度对ZrO_(2)陶瓷复合材料微观组织和力学性能的影响。结果表明,微波烧结制备出的ZrO_(2)陶瓷复合材料均为四方相结构,高温烧结后未出现新的产物,1400℃烧结陶瓷的半峰宽最小,结晶度最高,且气孔数量最少,组织最为致密。随着微波烧结温度的升高,ZrO_(2)陶瓷复合材料的密度和硬度均先增大后减小,当微波烧结温度为1400℃时,试样的密度和硬度均达到最大值,分别为5.46 g/cm^(3)和14.15 GPa。抗弯强度和断裂韧性随微波烧结温度的增大先升高后降低,当微波烧结温度为1400℃时,试样的抗弯强度和断裂韧性均达到最大值,分别为566.95 MPa和11.85 MPa·m^(1/2)。综合分析可知,1400℃烧结的ZrO_(2)陶瓷复合材料具有较高的抗开裂的能力,在口腔修复材料方面有着广阔的应用前景。ZrO_(2)ceramics have the characteristics of high strength and high toughness,and are widely used in dental restorative materials.ZrO_(2)ceramic composites were prepared with 8 mol%Y_(2)O_(3)as stabilizer and Al_(2)O_(3)as additive.The effect of microwave sintering temperature at 1300-1450℃on the microstructure and mechanical properties of ZrO_(2)ceramic composites was studied.The results showed that the ZrO_(2)ceramic composites prepared by microwave sintering were tetragonal structure,and no new products appeared after high temperature sintering.The half-peak width of ceramics sintered at 1400℃was the smallest,the crystallinity was the highest,the number of pores was the smallest,and the microstructure was the densest.With the increase of microwave sintering temperature,the density and hardness of ZrO_(2)ceramic composites first increased and then decreased.When the microwave sintering temperature was 1400℃,the density and hardness of the samples reached the maximum value,5.46 g/cm^(3)and 14.15 GPa respectively.With the increase of microwave sintering temperature,the bending strength and fracture toughness first increased and then decreased.When the microwave sintering temperature was 1400℃,the bending strength and fracture toughness of the sample reached the maximum value,which were 566.95 MPa and 11.85 MPa·m^(1/2),respectively.The comprehensive analysis shows that the ZrO_(2)ceramic composite sintered at 1400℃has high anti-cracking ability and has broad application prospects in the field of dental restorative materials.

关 键 词：微波烧结 ZrO_(2)陶瓷 复合材料 微观形貌 力学性能 

分 类 号：TQ174[化学工程—陶瓷工业]