Product Details

Thermocouple Protecting Tube

Product Description

Alumina Ceramic Protective Tube (99.7% Al2O3 material) can be used at operating temperature up to 1800℃ in both oxidizing and reducing atmospheres. Tubes have been evacuated to 10-7 Torr. It proves inert to carbon and refractory metals in many severe situations.

Main Performance Index

Performance Index	99.7 Alumina	95 Alumina	85Alumina
Al2O3 (%)	99.7	95	85
SiO2 (%)	<0.1	—	—
Density (g/cm3)	3.95	3.88	3.2
Water Absorption (%)	0	0.01	0.2
Cld Compressive Strength (MPa)	450	350	200
20C Leak Rates (Torr/L.sec)	<10-11	<10-11	<0-11
Twisting In High Temperature (mm)	1700C 0.2 allowance	1600C 0.2 allowance	1400C 0.2 allowance
Bonding In High Temperature	1700C non-caked	1600C non-caked	1400C non-caked
20—1000C Coefficient of Thermal Expansion (mm.10-6/C m)	8.6	8.2	8.2
Thermal Conductivity (W/m.k)	25	25	25
Electric Insulation Strength (KV/mm)	20	20	15
20C Direct Current Insulating Resistance (Ohm/cm)	1014	1014	1014
High-Temperature(1000C MΩ) Insulation Resistance (1300C MΩ_	≥0.08	≥0.08	≥0.08
High-Temperature(1000C MΩ) Insulation Resistance (1300C MΩ_	≥0.02	≥0.02	≥0.02
Thermal Shock Resistance	1550C 6 times not cracked	1550C 6 times not cracked	1300C 3 times not cracked
Max. Temperature (C)	1900	1800	1400

Standard Sizes

OD/ID: 6/3mm, 8/5, 10/7, 12/8, 14/10, 16/12, 20/14, 25/19, 30/25, 40/34, 50/44, 60/53, 70/63, 80/70, 85/75, 90/80, 100/90, 110/100, 120/110, 130/120, 140/130, 150/140, 160/150, 180/170mm

Length: 10~3000mm

Noted: Other special size could be customized according to your requirements

Typical Application

Alumina ceramic tube is mainly applied to wear, serious scour of material handling occasions, such as coal-fired power generation, metallurgy, coal, mining, industry, and other geological materials pipeline, as well as the use of electronic appliance such as insulation pipe; alumina ceramic rods is widely used in the industry of resistance to temperature and thermostat, as a resistance ceramic matrix and two-metal thermostat used in ceramic-top column.

Packaging & Shipping

Our Services

1. Your inquiry related to our products or prices will be replied within 24hours

2. Guarantee samples quality same as mass production quality

3. All our products have 2-years warranties.

4. Offering the support to solve the problem in the application or selling period.

5. Competitive prices based on same quality.