Borosilicate 3.3 Glass Tube

Description
1. Supplied directly from the factory, lowest price
2. Stable supply capacity, 500 tons per month

1. Manufacturing process
Furnace: Automatic temperature control, ≥ 1200° C;
The borosilicate glass product is processing with a advanced production technology by using the characteristic that in the condition of high temperature the glass is conductive. The borosilicate glass tube, its Melting temperature is1680° C, Softening temperature is 830 ° C, Coefficient of thermal expansion is 3.3× 10-6K-1.
2. Size
OD: 3 - 230mm;
Thickness: 1.1 - 11mm;
Length: Depends on different requirments

3. Physical and chemical properties

Mechanical properties

Density
2.23± 0.02g/cm³

Mohs scale of hardness
> 7
Thermodynamic performance

Coefficient of mean linear thermal expansion
(0-300° C)(3.3± 0.1)× 106K1

Softening point
820± 10° C

Transformation temperature
516± 10° C

Specific heat capacity
(20-100° C)0.82KJ× (Kg× K)-1

Thermal conductivity
1.2W× (m× K)-1

Thermal shock resistance
180K

The film thermoelectric performance
100K

Maximum working temperature
Shorttime(< 10h)500° C, Longtime(> 10h)450° C


Chemical properties

Hydrolytic class
ISO719/DIN12111 HGB1 ISO720
HGA1

Acid class
ISO1776/DIN12116
1

Alkali class
ISO695/DIN52322
A2

Optical properties

Refractive index
ND: 1047384

Transmission rate