烧结温度对牙科氧化锆增韧氧化铝陶瓷力学性能的影响

doi:10.19439/j.sjos.2017.02.001

上海口腔医学 ›› 2017, Vol. 26 ›› Issue (2): 129-133.doi: 10.19439/j.sjos.2017.02.001

烧结温度对牙科氧化锆增韧氧化铝陶瓷力学性能的影响

樊江源¹, 林婷婷^1,2, 胡方旋¹, 郑瑞斌^1,2, 樊帆¹, 麻健丰^1,2

1.温州医科大学口腔医学院·附属口腔医院口腔医学研究所,2.口腔修复科,浙江温州 325027

收稿日期:2016-07-05 修回日期:2016-09-18 出版日期:2017-04-25 发布日期:2017-05-04
通讯作者: 麻健丰,E-mail: dentistmacn@aliyun.com
作者简介:樊江源（1991-）,女,硕士,E-mail: fanjfany@aliyun.com
基金资助:
国家自然科学基金（81271186）

Effect of sintering temperature on mechanical properties of dental zirconia toughened alumina ceramics

FAN Jiang-yuan¹, LIN Ting-ting^1,2, HU Fang-xuan¹, ZHENG Rui-bin^1,2, FAN Fan¹, MA Jian-feng^1,2

1.Institute of Stomatology, 2.Department of Prosthodontics, School & Hospital of Stomatology, Wenzhou Medical University. Wenzhou 325027, Zhejiang Province, China

Received:2016-07-05 Revised:2016-09-18 Online:2017-04-25 Published:2017-05-04

摘要/Abstract

摘要： 目的: 研究烧结温度对凝胶注模成型牙科氧化锆增韧氧化铝（zirconia toughened alumina,ZTA）陶瓷力学性能的影响。方法: 经凝胶注模成型工艺制备的ZTA陶瓷坯体,分别烧结至1100、1200、1250、1300、1400℃,测定不同烧结温度组试件的三点抗弯强度、断裂韧性、维氏硬度,计算脆性指数;用扫描电镜观察三点弯曲试验后试件断面的显微形貌。采用SPSS 19.0 软件包对数据进行统计学分析。结果: 在1100~1400 ℃范围内,ZTA的三点抗弯强度、断裂韧性和维氏硬度均随着烧结温度的升高而增大;脆性指数的最小、最大值分别见于1200 ℃和1400 ℃温度组（P<0.05）,为（0.74±0.16）μm^-1/2和（2.76±0.14）μm^-1/2,两者的抗弯强度分别为（46.89±3.24）MPa和（349.64±54.72）MPa。结论: 凝胶注模成型的ZTA陶瓷在合适的烧结温度（1200℃）下具有较佳的可加工性能及一定的机械强度,初步满足临床牙科陶瓷加工的需求。

关键词: 氧化锆增韧氧化铝, 凝胶注模成型, 烧结温度, 力学性能, 可加工性

Abstract: PURPOSES: To investigate the effect of sintering temperature on mechanical properties of dental zirconia toughened alumina (ZTA) ceramics prepared by gel-casting technique. METHODS: The samples prepared by gel-casting were sintered at 1100, 1200, 1250, 1300 and 1400℃ for each group. The flexural strength, fracture toughness, Vickers hardness and brittleness index were obtained and microscopic morphology of each group was observed under scanning electron microscope (SEM). The data were statistically analyzed using SPSS 19.0 software package. RESULTS: The flexural strength, fracture toughness and Vickers hardness increased with the increasing sintering temperature during 1100~1400℃. The lowest brittleness index (0.74±0.16) μm^-1/2 was observed in group sintered at 1200℃ and the highest (2.76±0.14) μm^-1/2 was at 1400℃ (P<0.05), while the flexural strength of these two groups was (46.89±3.24) MPa and (349.64±54.72) MPa, respectively. CONCLUSIONS: The ZTA dental ceramics exhibit good machinability with proper sintering temperature (1200℃) and the strength meets the requirement of clinical application.

Key words: Zirconia toughened alumina, Gel-casting, Sintering temperature, Mechanical properties, Machinability

中图分类号:

R783.1

樊江源, 林婷婷, 胡方旋, 郑瑞斌, 樊帆, 麻健丰. 烧结温度对牙科氧化锆增韧氧化铝陶瓷力学性能的影响[J]. 上海口腔医学, 2017, 26(2): 129-133.

FAN Jiang-yuan, LIN Ting-ting, HU Fang-xuan, ZHENG Rui-bin, FAN Fan, MA Jian-feng. Effect of sintering temperature on mechanical properties of dental zirconia toughened alumina ceramics[J]. Shanghai Journal of Stomatology, 2017, 26(2): 129-133.

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烧结温度对牙科氧化锆增韧氧化铝陶瓷力学性能的影响

Effect of sintering temperature on mechanical properties of dental zirconia toughened alumina ceramics

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