thermal properties of fused quartz
DESCRIPTION
Thermal Properties of Fused QuartzTRANSCRIPT
Thermal Properties of Fused Quartz
-200 2000 600 1000 1400
Coefficient of Expansion
˚C-1
• 1
0-7
Representative coef�cient of expansion of fused quartz.Source: Momentive
Temperature, ˚C
8
4
0
-4
-8
-12
Viscosity Test
Log
Vis
cosi
ty
6.3
10.5
11.0
12.0
13.0
14.0
6.4 6.5 6.6 6.7 6.8 6.9 7.0
Source: Momentive.
(t/r, K) (10,000)
1300 ˚C
GE 214GE 254
GE 510
1200 ˚C
0 200 400 600 800
Thermal Diffusivity
m2 /
s •
104
.017
.015
.013
.011
.009
.007
.019
-200
Representative thermal diffusivity of fused quartz. Source: Momentive.
Temperature, ˚C
Viscosity
Log
10 (V
isco
sity
)
1000
16
14
12
10
8
6
41200 1400 1600 1800 2000
Representative viscosity of fused quartz.Source: Momentive.
Temperature, ˚C
-200
.4
.8
1.2
200 600 1000 1400
Heat Capacity
kJ/k
g •
˚C
Representative heat capacity of fused quartz.Source: R.B Sosman, The Properties of Silica, 1927
Temperature, ˚C
0
10
15
20
25
Diffusion Tubing, Collapse vs. Time for Tube ID
Co
llap
se in
mm
Temp. = 1200˚C; w.t. + 3.0mmSource: Momentive
Time (Hours)
165mm Tube ID
150mm Tube ID
144mm Tube ID
135mm Tube ID
101.6mm Tube ID
20 40 60 80 100
0 500 1000 1500
Thermal Conductivity
Representative thermal conductivity of fused quartz. Source: Momentive.
Temperature, ˚C
K
ESTIMATED
K =(J • kg) • m
m2 • S • ˚C
1.6
0.8
2.4
-250
15
20
10
0
Diffusion Tubing, Collapse vs. Time for Wall Thickness
Co
llap
se in
mm
Temp. = 1200˚C; I.D. = 135mmSource: Momentive
Time (Hours)
2.0mmWall
2.5mmWall
3.0mmWall
4.0mmWall
6.35mmWall
10050 150 200 250 300
5
0