1.
Products Performance
There are three types of fused quartz tubing? to meet the diverse
ultraviolet
radiation requirements of the lamps. Low-OH fused quartz tubing is new
empolder producting, It is product by quartz powder of UNIMIN .
Type 180 is the industry standard clear fused quartz material.
Economical and
available in a full range of sizes. Excellent visual, thermal, and
mechanical
properties with low hydroxyl content and tight dimensional tolerances.
High temperature lamps such as mercury and quartz halogen, ultraviolet
(UV) lamps,
thermocouples, and other high temperature products.
Type 230 is Ozone-Free Clear fused quartz tubing. It doped with
titanium
oxide to block deep UV radiation. Visual and dimensional
characteristics
are identical to Type 180, while thermal and mechanical properties are
similar. Anti-bacterial and other lamps where UV transmittance in the
germicidal range is required, but where deeper UV radiation or ozone
generation is undesirable.
Type 360 fused quartz tubing is cerium doped clear fused quartz which
absorbs essentially all UV-B and UV-C radiation while maintaining
transmittance efficiency in the visible spectrum range. UV-sensitive
high temperature applications including halogen and discharge lamps
where UV radiation would create personal or material exposure risks.
Eliminates need for coatings, filters, and lenses
for UV blocking. |
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2 Typical Trace Element Composition(ppm) |
|
Type |
Al |
B |
Ca |
Cu |
Fe |
K |
Li |
Mg |
Na |
Nn |
P |
Ti |
OH |
|
180 |
14 |
0.3 |
0.44 |
0.1 |
0.3 |
0.6 |
0.6 |
0.1 |
0.7 |
0.1 |
0.2 |
1.1 |
3-10 |
|
230 |
14 |
0.3 |
0.44 |
0.1 |
0.3 |
0.6 |
0.6 |
0.1 |
0.7 |
0.1 |
0.2 |
1.1 |
3-10 |
|
360 |
14 |
0.3 |
0.44 |
0.1 |
0.3 |
0.6 |
0.6 |
0.1 |
0.7 |
0.1 |
0.2 |
1.1 |
3-10 |
|
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| |
| 3 Typical
Sizes and Tolerances: (length : 1240 mm) |
| Diameter |
D tolerance |
Wall |
W tolerance |
| mm |
mm |
mm |
mm |
| 2mm- 5mm |
¡À0.10 |
0.3-0.7 |
¡À0.10 |
| 5mm- 8mm |
¡À0.20 |
0.6-1.0 |
¡À0.10 |
| 9mm-12mm |
¡À0.20 |
0.8-1.2 |
¡À0.10 |
| 13mm-20mm |
¡À0.30 |
1.0-1.5 |
¡À0.12 |
| 21mm-25mm |
¡À0.40 |
1.2-1.8 |
¡À0.15 |
| 26mm-35mm |
¡À0.50 |
1.2-2.5 |
¡À0.20 |
| 36mm-45mm |
¡À0.60 |
1.5-3.5 |
¡À0.25 |
|
|
| Length:500-2500
3 mm Max. Siding 10 % ; Max. Ovality 2%; Max. Bow2 %; |
|
| 4 Prices($/kg) (OH less 5ppm) |
| Diameter (mm)/Type |
180 |
230 |
360 |
| 3mm-4mm |
19 |
21 |
23 |
| 5mm-7mm |
17 |
19 |
21 |
| 8mm-12mm |
15 |
17 |
19 |
| 13mm-20mm |
17 |
19 |
21 |
| 21mm-25mm |
20 |
22 |
25 |
| 26mm-35mm |
23 |
25 |
28 |
|
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¡¡
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| 5 Properties |
Thermal properties
Strain temperature: 1075 degree Centigrade
Annealing temperature:1180 degree Centigrade
Softening temperature:1730 degree Centigrade
Working range:1700 -2100 degree Centigrade |
| |
|
| Physical Properties |
| Type Clear quartz tubing |
180 |
230 |
360 |
| Density [g/cm2 |
2.2 |
2.21 |
2.21 |
| Softening Point [oC] |
1690 |
1660 |
1610 |
| Annealing Point [oC] |
1215 |
1204 |
1160 |
| Strain Point [oC] |
1120 |
1106 |
1064 |
| Index of refraction |
1.4585 |
1.456 |
1.460 |
| Specific Heat [ J/kgoK ] |
670 |
700 |
690 |
| Compressive Strength (Pa) |
>1.1x109 |
0.9x109 |
0.6x109 |
| Y oung's Modulus (Pa) |
7.2x10 5 |
7.5x106 |
7x106 |
| lectrical resistivity (ohm cm @ 350 ¡ãC) |
7x109 |
2.5x1010 |
5x1010 |
| Dielectrical Constant (@1MHz |
3.75 |
5.8 |
6 |
|
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| Optical properties |
Optical transmission properties provide a means for
distinguishing among various types
of fused quartz as the degree of transparency reflects material purity
and the method
of manufacture. Specific indicators are the UV cutoff and the presence
or absence of bands
at 245 nm and 2.73 micrometers. The UV cutoff ranges from about 155 to
175 nm for
a 10 mm thick specimen and for pure fused quartz is a reflection of
material purity.
The presence of transition metallic impurities will shift the cutoff
toward longer
wavelengths.When desired, intentional doping, e.g., with Ti in the
case of Type 230,
may be employed to increase absorption in the UV. The absorption band
at 245 nm
characterizes a reduced glass. If fused quartz is contain hydroxyl
ions(OH),
the fundamental vibrational band of incorporated structural hydroxyl
ions will absorb
at 2.73 micrometers.
UV CutoffAs the transmission curve illustrates, Type 230 fused quartz
has a UV cutoff (1 mm thickness)
at < 160 nm, a small absorption at 245 nm and no appreciable
absorption due to hydroxyl ions.
Type 230, which contains approximately 150 ppm Ti, has a UV cutoff at
about 230 nm for
a 1 mm thick sample.? |
|
| High IR Transmission |
The IR edge falls between 4.5 and 5.0 micrometers
for a 1 mm thick sample.
Type 180(low OH) fused quartz is a very efficient material for the
transmission of infrared radiation. Its infrared transmission extends
out to about
4 micrometers with little absorption in the "water band" at 2.73
micrometers.
Conversion to other thicknesses can be accomplished with the following
formula:
T = (1-R)2 e -at
Where: T = percent transmission expressed as a decimal.
R = surface reflection loss for one surface.
e = base of natural logarithms
a = absorption coefficient, cm-1
t = thickness, cm |
| |
| Wavelenth(nm) |
wavelengh through£¨%£© |
wavelengh through£¨%£© |
wavelengh through£¨%£© |
| Type |
180 |
230 |
360 |
| 170 |
5 |
0 |
0 |
| 180 |
10 |
0 |
0 |
| 190 |
15 |
0 |
0 |
| 200 |
20 |
0 |
0 |
| 220 |
50 |
5 |
0 |
| 240 |
75 |
44 |
2 |
| 254 |
85 |
80 |
6 |
| 260 |
87 |
83 |
4 |
| 280 |
90 |
90 |
0 |
| 300 |
92 |
91 |
0 |
| 320 |
92 |
91 |
0 |
| 340 |
92 |
92 |
5 |
| 360 |
92 |
92 |
26 |
| 380 |
92 |
92 |
65 |
| 400 |
92 |
92 |
81 |
| 420 |
92 |
92 |
88 |
| 440-2000 |
92 |
92 |
92 |
| 2500 |
92 |
92 |
92 |
| 2730 |
90 |
90 |
90 |
| 3000 |
91 |
91 |
91 |
| 3500 |
88 |
88 |
88 |
| 4000 |
73 |
73 |
73 |
| 4500 |
35 |
35 |
35 |
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