Anusavice K J, Shen C, Lee R B
Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville 32610-0446.
J Dent Res. 1992 May;71(5):1134-8. doi: 10.1177/00220345920710050101.
This study investigated the effectiveness of tempering and ion-exchange treatments on crack growth and bi-axial flexural strength of seven feldspathic porcelains. The results showed that tempering treatment was more effective in strengthening porcelain than was the ion-exchange process as measured by the bi-axial flexural strength. However, the results of initial crack size induced by a microhardness tester showed that ion-exchange yielded a surface that was more resistant to crack initiation than was that yielded by the tempering treatment. EDX and microprobe analyses showed that there was evidence of exchange between Na+ within the porcelain surface and K+ from the ion-exchange agent applied on the surface.
本研究调查了回火处理和离子交换处理对七种长石质瓷裂纹扩展及双轴弯曲强度的影响。结果表明，通过双轴弯曲强度测量，回火处理在增强瓷体方面比离子交换过程更有效。然而，由显微硬度测试仪诱导产生的初始裂纹尺寸结果表明，离子交换产生的表面比回火处理产生的表面更能抵抗裂纹萌生。能谱分析（EDX）和微探针分析表明，有证据显示瓷体表面的Na⁺与施加在表面的离子交换剂中的K⁺之间发生了交换。
