Abstract:

Glass is the weak phase in the glass-alumina composite , and it plays a key role in determining the physical , me2 chanical and optical properties. The purpose of this study was to explore the fabrication arts of GI- Ⅱtinted infiltration glass and de2 termine its properties.Methods : The thermal properties of the glass were tested on a TMA2940 thermal analyzer with heating rate of 5 ℃Pmin and temperature range of 25～750 ℃. The bar- shaped specimens were prepared with the size of 25 mm×5 mm ×2 mm and their flexural strengths and elastic modulus with 3-point bending test were measured. The Vicker’s hardness and indenta2 tion fracture toughness were also determined. The refractive index and changes of chemical constituents were tested by means of V prismatic refractometer and 2910 DTA analyzer. Results : The results showed that the thermal expansion coefficient , Tg and Tf , refractive index , 3-point bending flexural strength , bending elastic modulus , Vicker’s hardness , indentation fracture toughness and density were 61997 ×10 - 6 ℃- 1 (25～500 ℃) , 635 ℃and 650 ℃, 1164 MPa , 96127 MPa , 31116 GPa , 51534 GPa , 1105 MN·m1P2 , and 31214 gPcm3 respectively. Though certain heat processing conditions did result in micro-crystalline in the glass , it remained stable under routine glass infiltration firing cycles.Conclusion :GI- Ⅱtinted infiltration glass had favorable physical , me2 chanical properties and good thermal stability.

Key words: 　tint, infiltration glass, chemical composition, physical properties