Al2O3 99% Alumina Insulated Tube for Temperature Measuring Element

• Application: Insulators
• Type: Insulation Sleeve
• Material: Ceramic
• Thermal Rating: 1700 Max
• Certification: ISO9001
• Color: White
• Model NO.: chemshun ceramics
• Brand: Chemshun Ceramics
• Transport Package: Wooden Box
• Specification: OD 1mm to 8mm, Lenth 2500mm
• Trademark: Chemshun Ceramics
• Origin: P. R. China
• HS Code: 6909191200
• Production Capacity: 25000ton/Year

Product Description

Alumina insulated tube

Alumina insulated tube is made of materials with good insulation, the main function is to separate the different pole items of the temperature measuring element, to avoid interference of the two poles or contact short circuit. When in use, the two poles of the temperature measuring element can be inserted into different holes in the same direction. After installation, protect with protective tube set.

Due to different use temperatures, it is subdivided into 99.7 porcelain (corundum), 99 porcelain (corundum), 95 porcelain (corundum), 85 porcelain (high-aluminum porcelain), 75 porcelain (mullite porcelain), and chemical porcelain with different alumina content. 40 aluminum), the higher the aluminum oxide content in the above materials, the higher the use temperature, the highest aluminum content vertical use 1710 degrees Celsius, the lowest aluminum content uses 1100 degrees Celsius.


Normal size: The conventional size of the insulating tube is 1mm to 8mm in outer diameter, the hole is divided into single hole, double hole, four hole and porous, the minimum hole diameter is 0.5mm, the longest length is 2500mm, other sizes can also be made according to user requirements

Physical Property:

Material		Alumina Content
Characteristic	Unit	AL99.7	AL99.5	AL99	AL95
Content		99.7%	99.5%	99%	95%
Color		Ivory white	Ivory white	Ivory white	Ivory white,
Density	g/cm	3.94	3.9	3.8	3.75
Straightness		2‰	2‰	2‰	2‰
Hardness	Mohs hardness	9	9	9	8.8
Water absorption		<=0.2	<=0.2	<=0.2	<=0.2
Flexural strength	(20ºC) Mpa	375	370	340	304
Compressive strength	(20ºC) Mpa	2300	2300	2210	1910
Thermal expansion coefficient	10/ºC	7.6	7.6	7.6	7.6
Dielectric strength	AC.kv/mn	10	10	10	10
Dielectric loss	<0.0001	<0.0001	0.0006	0.0004	0.001
Volume resistivity    (20ºC)    (300ºC)	Ω.cm3	>1014 2*1012	>1014 2*1012	>1014 4*1011	>1014 2*1011
Dielectric constant	25ºC@1HM	9.8	9.7	9.5	9.2
Thermal conductivity	W/m.k	35	35	34	20
Long-term use temperature	ºC	1700	1650	1600	1400

Packaging methods : carton packaging, export wooden box packaging, paper tube packaging, hanger packaging