Clear quartz tubing(OD4mm to 420mm)

ppm1. Customized quartz tube for heater used 2. high purity 3. good spectral transmission OD4mm to 420mm

Quartz tube for heater using 

Quartz tube for heater using  available as continuous machine drawn and automatic controlled tubing. This glass has typical characteristics of high purity, good spectral transmission, well controlled dimension and low OH and so on. It servers as the first choice of heat resistant material for halogen lamps, mercury lamps, metal halide lamps and other quartz lamps. This glass can be supplied in the range of 3-80 mm outside diameter, 0.6-2.0 mm wall thickness and 800-2400mm length. Exhaust tubes with good CPK are suitable for high-speed streamline production. And further processing of trim cutting, fire polishing, bending and pinching can be done according to the requirement of customers. OH-content can be controlled within 20ppm/ 15ppm/ 10ppm/ 5ppm/ 2ppm/ according to the requirement of customers.

Dimensional Tolerance

Range of OD	OD	WT	Siding	Out of Round	Bow/1220mm
≤6mm	±2.0%	±10%	12%	2.00%	2.5mm
6.00mm-15.00mm	±1.25%	±8%	10%	1.50%	2.5mm
15.00mm-20.00mm	±1.25%	±10%	15%	1.50%	2.5mm
20.00mm-25.00mm	±1.25%	±10%	15%	1.50%	3.0mm
25.00mm-30.00mm	±1.35%	±12%	15%	1.50%	3.0mm
30.00mm-80.00mm	±1.5%	±14%	15%	2.00%	3.0mm

Physical Property

	214	219	254
Density (g/cc)	2.2	2.21	2.21
Coefficient of Thermal Expansion(cm/cm°C)	5.5*10-7	5.9*10-7	6.7*10-7
Softening Point (°C)	1683	1660	1615
Annealing Point (°C)	1215	1204	1163
Strain Point (°C)	1120	1106	1066
Refractive Index	1.4585	1.456	1.46
Specific Heat (j/kgOK)	670	700	690
Compressive Strength  (Pa)	>1.1*109	0.94*109	0.55*109
Youngs Modulus (Pa)	7.2*1010	7.5*1010	7*1010

Chemical Composition

Cr	Ge	Fe	Mg	Ti	Ga	Al	Na	Li	K
0.105	0.4	0.27	0.05	0.57	0.8	6.42	0.85	0.65	0.81