Alumina Thermocouple Protection Tubes
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Price:
Negotiable
- minimum:
- Total supply:
-
Delivery term:
The date of payment from buyers deliver within days
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seat:
Shandong
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Validity to:
Long-term effective
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Last update:
2020-06-01 18:00
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Browse the number:
380
Company Profile
By certification [File Integrity]
Contact: keruisheng(Mr.)
Email: 
Telephone: 
Phone: 
Area: Shandong
Address: Shandong
Website: http://www.koceramic.com/ http://keruisheng.bdsfmj.com/
Product details
Alumina thermocouple protection tubes are mainly used to protect the thermometric element, to isolate the thermometric element from the outside, and to reduce or prevent the element from being eroded, oxidized or damaged by external substances during use.
Materials
Al2O3: 99.7% Al2O3, 99%Al2O3, 95%Al2O3, 85%AL2O3, the higher the alumina content, the higher the use temperature;
Regular dimension
● Outer diameter：3mm-25mm；
● Maximum length 2500mm；
● Thickness: by dimension scale of product 0.5mm to 4mm.
Materials Physical and Chemical Index
Item |
Unit |
AL99.7% |
AL99 |
AL95 |
Al2O3 content |
— |
99.7% |
99% |
95% |
Color |
— |
Ivory white |
Ivory white |
Ivory white，white |
Air tightness |
— |
airtight |
airtight |
airtight |
Density |
g/cm3 |
3.94 |
3.8 |
3.7 |
Straightness |
— |
2‰ |
2‰ |
2‰ |
hardness |
Moh's hardness |
9 |
9 |
8.8 |
Water absorption |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.2 |
Flexural strength（20℃） |
Mpa |
375 |
340 |
304 |
Compressive strength（20℃） |
Mpa |
2300 |
2210 |
1910 |
Thermal expansion coefficient （25℃-800℃） |
105/℃ |
7.6 |
7.6 |
7.6 |
Insulation strength（thickness:5mm) |
AC-kv/mm |
10 |
10 |
10 |
Dielectric loss 25℃@1MHz |
— |
<0.0001 |
<0.0006 |
<0.0004 |
|
Volume resistivity （20℃）（300℃） |
Ω·cm3 |
>1014 >1010 |
>1014 >1010 |
>1014 >1012 |
Long-term use temperature |
℃ |
1700 |
1600 |
1200 |
Thermal conductivity（25℃） |
W/moK |
35 |
34 |
20 |
Feature
1．Thermal stability: Alumina can be used in oxidizing and reducing atmospheres up to 1600℃ and vacuum furnaces up to 1750℃.
2．Fully dense: Alumina provides an impermeable tube that prevents contamination and can be used to form air-tight components.
3．High chemical resistance: Alumina is chemically inert and will not be corroded by water or steam. It resists corrosive substances, such as strong acids or bases, even at high temperatures.
4．Electrical insulation: Alumina is also widely used as an electrical insulation material. It can be used for insulators that operate at high temperatures。
Our Service
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