Rectangular Capillary Quartz Glass Tube with roundness inside

Material: fused quartz / silica glass

Tolerances:+/-0.1mm

Clear and clean

Free of air bubble/airline/scratch

Customer-designed quartz glass products

Parameter:

Density: 2.203 g/cm3

Hardness: 7 (Modified Scale); 5.36.5 (Mohs Scale)
Tensile strength: 48.3 MPa
Compressive strength: >1.1 GPa
Bulk modulus: ~37 GPa
Rigidity modulus: 31 GPa
Young's modulus: 71.7 GPa
Poisson's ratio: 0.16
Coefficient of thermal expansion: 5.5×10-7 cm/(cmK) (average from 20°C to 320°C)
Thermal conductivity: 1.3 W/(mK)
Heat capacity: 45.3 J/mol
Softening point: c. 1730°C
Annealing point: c. 1180°C
Strain point: 1075°C
Electrical resistivity: >1018 Ω×m

Dielectric constant: 3.75 at 20°C 1 MHz
Dielectric loss factor: less than 0.0004 at 20°C 1 MHz

Index of refraction at 587.6 nm (nd): 1.4585

BEIJING ZHONG CHENG QUARTZ GLASS CO.,LTD(ZCQ) was founded in 1998, and we emphasis on optical fused quartz glass products and optical glass has resulted in our excellent reputation in this field . We fulfill our customers requests in our manufacturing base located in Beijing, China. As an international supplier of quartz glass, fused silica and optical glass products, we have been authenticated by GB/T 19001-2008 QMS & CE, Our products are widely used in the Semiconductor, Telecommunications, Solar Energy, Electron, Optics, Optical Fiber, Chemical Industry, Coating, Medical Treatment, Aerospace, Military Affairs and other high-tech industries. 

BEIJING ZHONG CHENG QUARTZ GLASS CO.,LTD(ZCQ) was founded in 1998, and we emphasis on optical fused quartz glass products and optical glass has resulted in our excellent reputation in this field . We fulfill our customers requests in our manufacturing base located in Beijing, China. As an international supplier of quartz glass, fused silica and optical glass products, we have been authenticated by GB/T 19001-2008 QMS & CE, Our products are widely used in the Semiconductor, Telecommunications, Solar Energy, Electron, Optics, Optical Fiber, Chemical Industry, Coating, Medical Treatment, Aerospace, Military Affairs and other high-tech industries. 

Why to choose us ?

BEIJING ZHONG CHENG QUARTZ GLASS CO.,LTD(ZCQ) was founded in 1998, and we emphasis on optical fused quartz glass products and optical glass has resulted in our excellent reputation in this field . We fulfill our customers requests in our manufacturing base located in Beijing, China. As an international supplier of quartz glass, fused silica and optical glass products, we have been authenticated by GB/T 19001-2008 QMS & CE, Our products are widely used in the Semiconductor, Telecommunications, Solar Energy, Electron, Optics, Optical Fiber, Chemical Industry, Coating, Medical Treatment, Aerospace, Military Affairs and other high-tech industries. 

What is our business partners ?

We provide quartz glass products for customers in America, Germany, France, Britain, Australia, Korea, Japan, and more than 50 countries.  

Please do not hesitate to contact us as soon as possible. Your early reply will be highly appreciated.