JEFFER Engineering and Technology Co.,Ltd
JEFFER Engineering and Technology Co.,Ltd JEFFER Engineering Design Co.
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Quartz Glass Processing Plant Flint Glass Production Line
Brief Introduction
Borosilicate tube glass is a special kind of glass which incorporates two chemicals in high concentration: boron trioxide and silica.These safe and environmentally-friendly chemicals make borosilicate glass more heat resistant than other forms of glass on the market.
Technological Features
| SiO2 Content | >80% |
| Strain Point | 520℃ |
| Annealing Point | 560℃ |
| Softening Point | 820℃ |
| Refractive Index | 1.47 |
| Light Transnission(2mm) | 0.92 |
| Elastic Modulus | 67KNmm-2 |
| Tensile Strength | 40-120Nmm2 |
| Glass Stress Optical Coefficient | 3.8*106m2/N |
| Processing Temperature (104dpas) | 1220℃ |
| Linear Coefficient of Expansion(20-300℃) | 3.3*10-6K-1 |
| Density(20℃) | 2.23gcm-1 |
| Specific Heat | 0.9jg-1K-1 |
| Thermal Conductivity | 1.2Wm-1K-1 |
