Clear large diameter tempered high borosilicate glass tube 250mm length
Borosilicate glass has a very low thermal expansion coefficient, about one-third that of ordinary glass. This reduces material stresses caused by temperature gradients, thus making it more resistant to breaking. This makes it a popular material for objects like telescope mirrors, where it is essential to have very little deviation in shape. It is also used in the processing of high-level material, where the waste is immobilised in the glass through a process known as vitrification .
(1). Windows (2). Lenses (3). Mirror substrates (4). Crucibles, trays and boats (5). UV transmitting optics (synthetic fused silica) (6). IR transmitting optics (7). Metrology components
1200*600; 1150*850; 1150*1700 Other formats upon request
Available thickness (mm)
Density (g/cm3) (at 25°C)
Co-efficient of expansion (α) (20-300°C)
Softening point (°C)
Identical temperature difference (K)
100 300(Strengthening type)
Thermal shock resistance(K)
Maximum working temperature(°C)
Refractive (nd )
pre-cut formats, edge processing, drilling, coating, semi-tempering, printing, etc.
HIGHBORN is one of the leading high quality quartz glass and precise ceramics manufacturer and supplier in China.
HIGHBORN has always been a defining force in the sale and fabrication of quartz glass within the semi-conductor, chemical, solar Energy and precise ceramics within semi-conductor , solar energy, textile, electronic, and laser industries.
Not only have we mastered the fabrication technology, our strength has always been based around listening to and understanding our customer's requirements and expectations.