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High boron silicon glass

Update: 2015/12/14      View:
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Introduction

The specific physical and chemical properties of high boron silicon glass are as follows:
With more than 80% silicon content
Strain temperature 520
Annealing temperature 560
Softening temperature 820
Refractive index 1.47
Transmittance (2 mm) 92%
Modulus of elasticity 76KNmm - 2
Tensile strength 120Nmm 40- - 2
Glass stress optical constant 3.8 * 10-6 square mm / no
Processing temperature (104dpas) 1220
Linear expansion coefficient (20-300) 3.3 * K 10-6 - 1
Density (20) 2.23gcm - 1
Specific heat 1K - 0.9jg - 1
Thermal conductivity 1K - 1.2Wm - 1
Water resistance (International Standard Organization 719) 1
Acid resistance (International Standardization Organization 195) 1
Alkali resistance (ISO 695) 2

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