Studies on Sintering of Dental Porcelain : (Part 4) Strength and Transluency of Sintered Composite

DOI
  • KON Masayuki
    Department of Dental Engineering, School of Dentistry, Tokushima University
  • ASAOKA Kenzo
    Department of Dental Engineering, School of Dentistry, Tokushima University
  • KUWAYAMA Norihiko
    Department of Dental Engineering School of Dentistry, Tokushima University

Bibliographic Information

Other Title
  • 陶材の焼結に関する研究 : (第4報)複合焼結体の強さと透光性について

Search this article

Description

The sintered composite were made from mixed powder compacts prepared from low fusing glass powders and each one of alumina powder, quartz powder, silica glass powder using sintering method at the temperature to 1000℃, and the affections of physical properties of sintered composite were investigated by measurements of transverse strength and transparency.<br>　Transverse strength value of sintered composite of alumina and pyrex glass (expansion coefficient 3.6×10-6) or soda-lime-silica glass (10.7×10-6) increased with increase alumina content, particularly sintered composite with 50wt% alumina addition showed the transverse strength value of 170-180 MPa. The addition of alumina was more effective on the strength of sintered composite comparing with quartz and silica glass, inversely, transparency of sintered composite decreased with increase of alumina content.<br>　In the case of the sintered composite of silica glass and low fusing glass, transverse strength velue decreased with increase of silica glass content. The sintered composite with silica glass addition showed smaller transparency value by difference of the refractive index due to the generation of cristobalite followed with the crystallization of cristobalite than that without crystallizing property.

Journal

Details 詳細情報について

Report a problem

Back to top