青岛大学学报（自然科学版）2018，Vol.31Issue(2)：34-41,8.DOI:10.3969/j.issn.1006-1037.2018.05.07
微波烧结方法对常规预烧结牙科氧化锆陶瓷组织和性能的影响
Effect of Post Microwave Sintering on Microstructure and Properties of the Conventionally Sintered Dental Zirconia Ceramics
摘要
Abstract
The change curve of the dielectric constant of zirconia samples with the change of temperature is measured by a high temperature testing platform.On the basis of determining the mutation temperature of zirconia dielectric constant,which varied suddenly,is about 600 degrees.In view of the slow temperature rise and waste energy of the microwave sintered zirconia,it is proposed to change the sintering mode at the point of sudden change of temperature.That is,conventional sintering is used before the mutation temperature,and microwave sintering is used after the sudden change of temperature,which is also called conventional and microwave sintering.The specimens were divided into two groups by conventional sintering and conventional & microwave sintering on the Zirconia dental block respectively,which is to evaluate the effect of two kinds of sintering methods on density,Vickers hardness,fracture toughness,biaxial flexural strength and translucency of Dental Zirconia Ceramics.And the microstructure of zirconia was characterised by scanning electron microscopy (SEM).The results show that,compared with the conventional sintering,the grains of conventional & microwave sintering are more compact,the pores are less,and the material is sintered into porcelain.Two kinds of sintering methods are similar in changing the density for zirconia.The conventional & microwave sintering is superior to conventional sintering in the Vickers hardness,fracture toughness,biaxial flexural strength and translucency.关键词
维氏硬度/断裂韧性/双轴弯曲强度/半透性/常规微波混合烧结Key words
Vickers hardness/fracture toughness/biaxial flexural strength/translucency/conventional & microwave sintering分类
化学化工引用本文复制引用
穆阳阳,陈利祥,陆笑,周同同,葛晓辉,徐韶鸿,姜学军..微波烧结方法对常规预烧结牙科氧化锆陶瓷组织和性能的影响[J].青岛大学学报（自然科学版）,2018,31(2):34-41,8.基金项目
国家自然基金(批准号:51272111)资助. （批准号:51272111）
