Introduction
Thanks to the big total surface area of bubbles per unit volume, it can increase the reflection of heat rays in the quartz glass, which improves its ability to intercept heat rays. It is wildly used in heat insulation parts of various quartz devices such as semiconductors and solar energy.
FLHO321H
FLHO321N
Chemical property
Solution: HF 10wt%,25℃,Etching time:3 hours
Solution: KOH 10wt%,20℃,Etching time:72 hours
Fire polished surface (μm/min)
0.07
Ground surface(μm/min)
0.1
Fire polished surface (μm/min)
0.002
Ground surface (μm/min)
0.005
Chemical purity
FLHO321H Impurity Typical Value (ppm)
Al
8.00
B
0.05
Ca
0.60
Co
＜0.05
Cu
＜0.01
Fe
0.15
K
0.10
Li
0.10
Mg
＜0.05
Mn
＜0.05
Na
0.10
Ni
＜0.05
Ti
1.33
OH
~170
FLHO321N Impurity Typical Value (ppm)
Al
12.00
B
0.08
Ca
0.30
Co
＜0.02
Cu
＜0.01
Fe
0.10
K
0.20
Li
0.40
Mg
＜0.05
Mn
＜0.05
Na
0.40
Ni
＜0.03
Ti
1.2
OH
—
Transmission
Transmission of FLHO321H
Transmission of FLHO321N
Reflectivity of FLHO321H
Reflectivity of FLHO321N
Physical Property
Project
FLHO321N
FLHO321H
Mechanical Properties
Density（g/cm3）
Young’s Modulus（GPa）
Vickers Hardness（MPa）
2.05
74
6-7
2.05
74
6-7
Electrical Properties
Dielectric Constant（10GHz）
Loss Factor（500MHz）
2.05
6-7
2.05
6-7
Thermal Properties
Strain Point（℃）
Annealing point（℃）
Softening point（℃）
Thermal Conductivity（20℃）(W/m.k)
Specific Heat（20℃）（J/kg.k)
Expansion Coefficient(x10-7 /k) α：30℃~600℃
Diffusivity（20℃）(×10 -7m2 /s)
Viscosity（1200℃）
1.24
749
8.4
11.72
1670
1150
1070
6.4
1.24
749
8.4
11.72
1670
1150
1070
6.4
Flame Opaque Quartz
FLHO321H FLHO321N
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