High Alumina Ceramic Tube Closed One End for Thermocouple

• Customization: Available
• Feature: Long Time Materials
• Refractoriness (℃): 1770< Refractoriness< 2000
• Shape: Pipe
• Type: Refractory Material
• Material: High Pure Alumina
• Transport Package: Wooden Box
• Specification: 95/99% Alumina
• Trademark: CCN
• Origin: China
• HS Code: 69091100
• Production Capacity: 50000000PCS/Year

Product Description

Product Description

High alumina ceramic tube closed one end for thermocouple

Alumina ceramic protection tubes have good mechanical strength, wear resistance, corrosion resistance and good air tightness, so they are excellent primary protection tubes. Alumina ceramic protection tubes can be used for primary and secondary protection tubes on precious metal (platinum-based) thermocouples.

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/cm^3	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(20ºC)	Mpa	375	340	304
Compressive strength(20ºC)	Mpa	2300	2210	1910
Thermal expansion coefficient(25ºC-800ºC)	105/ºC	7.6	7.6	7.6
Insulation strength(thickness:5mm)	AC-kv/mm	10	10	10
Dielectric loss 25ºC@1MHz	-	<0.0001	<0.0006	<0.0004
Volume resistivity (20ºC) (300ºC)	Ω·cm^3	>1014 >1010	>1014 >1010	>1014 >1012
Long-term use temperature	ºC	1700	1600	1200
Thermal conductivity(25ºC)	W/moK	35	34	20

 

 

Regular dimension

Outer diameter: 3mm-25mm;

Maximum length 2500mm;

Thickness: by dimension scale of product 0.5mm to 4mm.

Customized size is available

Detailed Photos