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95 Alumina Ceramic Thermocouple Protection Tube Closed One End and Open Both End
Lonci Group provides a new and wide range of ceramic tubes which suits for high temperature thermocouples. A comprehensive range of closed one end tubes and open both end tubes in various diameters and stocks are available for immediate delivery. All can be cut as required length. Other sizes are available to special order.
Chemical Composition and Physical Properties
95 Series |
99 Series |
997 Series |
Steatite |
Zr₂O Y-PSZ |
Al₂O₂+Zr₂O |
|
Al₂O₃(%) |
≥95 |
≥99 |
≥99.7 |
|||
SiO₂(%) |
≤2.3 |
＜0.2 |
＜0.04 |
＜0.2 |
＜0.04 |
|
Fe₂O3(%) |
＜0.1 |
＜0.1 |
＜0.05 |
＜0.1 |
＜0.05 |
|
Alkaline Substances(%) |
＜0.1 |
＜0.1 |
＜0.08 |
＜0.1 |
＜0.08 |
|
Density(g/cm³) |
3.7 |
3.87 |
3.89 |
2.7 |
3.87 |
3.89 |
Hardness(Mohs) |
8.8 |
9 |
9 |
9 |
9 |
|
Flexural strength(Mpa) |
300 |
340 |
390 |
150 |
1000 |
600 |
Compressive strength(Mpa） |
3400 |
3600 |
3900 |
900 |
3000 |
3600 |
Modulus of elasticity(Gpa) |
350 |
380 |
390 |
120 |
205 |
350 |
Impact resistance(Mpa m1/2) |
4.0 |
5.0 |
5.2 |
8 |
7.5 |
|
Webull modulus(m) |
10 |
10 |
12 |
22 |
18 |
|
Vickers hardness(HV0.5) |
1800 |
1900 |
2000 |
1300 |
1600 |
|
Thermal expansion coefficient(10-6k -1) |
5.0-8.3 |
5.4-8.3 |
5.5-8.4 |
6.0-9.0 |
10 |
6.0-8.6 |
Thermal conductivity(W.mK） |
24 |
27 |
28 |
2.0-2.5 |
＜2 |
18 |
Thermal shock resistance（T℃） |
250 |
270 |
280 |
100 |
270 |
320 |
Volume resistivity at 20℃（Ωcm） |
＞1014 |
＞1014 |
＞1015 |
＞1013 |
＞1010 |
＞1013 |
Dielectric strength(kv/mm) |
20 |
25 |
30 |
20 |
||
Operating temperature in short time(℃) |
1650 |
1800 |
1850 |
1450 |
||
Operating temperature in long time(℃) |
1530 |
1650 |
1700 |
1250 |
||
color |
pink,white |
white,ivory |
ivory |
white |
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