High Quality Whole sale Polished Synthetic Fused Slica Plate

High Quality Synthetic Fused Slica Polishing Plate   Product Introductions Appearance: dia:36, thick:1.5 both sides polished, no chamfer Material: Synthetic fused silica,   Processing Technique: single or both sides polished ,grinded,    Regular working temperature: 1100°C   Resistant of strong chemistry like acid or alkali        Physical Parameter of ZCQ Quartz Products:  

Parameter	Standard Grade	Precision Grade	Ultra-precision Grade
Dimensional Tolerance	±0.1	±0.1	±0.1
Clear Aperture	>80% to >90%	>80% to >90%	>80% to >90%
Surface Quality	60-40	40-20	20-10 to 10-5
Parallelism	1 arc min	30 arc seconds	1 arc min
Wavefront Distortion	1λper 25mm	λ/4	λ/10
Protective Bevel	<0.25x45 deg	<0.25x45 deg	<0.25x45 deg
Coating	optional

       Optical Property:     Technical Information :

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) ( from 20°C to 320°C)
Thermal conductivity	1.3 W/(mK)
Heat capacity	45.3 J/mol
Softening point	1730°C
Annealing point	1180°C
Strain point	1075°C
Electrical resistivity	>1018 Ωm
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

      Try ZCQ PRODUCTS BETTER TECHNOLOGY AND LIFE ,PLEASE!       Packaging & Shipping package: protection paper, green air bag,  air film, carton ,                   safe and ecnomic even for freight collect as well. Shipping methods and charges: China post(15-25days) Epacket to USA (10-15days) EMS(7-10days) Fedex(5-7days) DHL(5-7days) Actual shipping charge will be calculated upon product weight.    Our Services 1.Based in Beijing, heart of China, ZCQ is a technology and quality oriented manufaturer with 20 years history. 2.With senior engineer supervise, we are glad  to advise customers on pressure, temperature etc application and engineering questions. 3.ZCQ  accepts second production in case some products don’t meet requirements.  4.1 hour from international meeting center of Beijing, ZCQ invites guests to visit our company after long day meeting and get relaxed in nature. Our company is also sitted in arms of mountains and river.