Negotiable
The date of payment from buyers deliver within days
Beijing
Long-term effective
2021-08-03 06:20
255
Company Profile
Lianyungang Queen INTL Co., LtdBy certification [File Integrity]
Contact:queen(Mr.)
Email:
Telephone:
Phone:
Area:Beijing
Address:Beijing
Website:http://www.cqueen-quartz.com/ http://queen.sztolips.com/
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
Our Services
Questions and Help
If you have any questions concerning products, please contact us.
Order Acceptance and Pricing
ZCQ will provide a Pro Forma Invoice as confirmation on customers’ order.
Production will be arranged in line with technical specification within the invoice once payment received.
Payment Terms
Advanced T/T Credit Card Payments: ZCQ accepts Visa, MasterCard, and American Express.
We also accept Paypal payment.
Shipping & Handling
Freight Policy: If you have a freight collect account with any shipping carrier, please tell us in advance.
Or we will advise you an most economic method of shipment before checkout.
Return/Guarantee Policy
A Return Merchandise is to be returned on the original shipping form. Returns may be subject to freight. Credit will not be issued until the return has been received and inspected by ZCQ. Please send us an email and include your order numbe.
http://www.cqueen-quartz.com/