Preparation of SiO2-Al2O3glass powders by the sol-gel process for dental applications

✍ Scribed by M. Taira; M. Yamaki

• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 399 KB
• Volume: 6
• Category: Article
• ISSN: 0957-4530
• DOI: 10.1007/bf00146855

✦ Synopsis

SIO2-AI203 binary glass powders with AI203 contents up to 50 wt% have been synthesized by the sol-gel process. The starting solution (sol) consisted of 1 mole of tetraethoxysilane, 50 moles of water containing aluminum nitrate, 10 moles of ethyl alcohol and 0.02 moles of HCI catalyst. The sol was converted into gel by heating at 85 °Cand suction by running water. The sintering process was analysed by DTG thermal analysis. The fired powders were examined by XRD. It was confirmed that the gels were converted into the glass structure without crystallization. The measurements of refractive index and powder size of fired powders revealed that these powders could be used as refractive-index-adjustable fillers for dental composite resins. The other potential usage of the SiO2-AI203 powders obtained might be in the production of powders for dental cements.