Industrial Al2O3 Refractory Alumina Ceramic Furnace Tube

Product Description

The main material of ceramic tube is Aluminium Oxide( Al2O3). The purity varies from 60%-99.7%, density from 3.0-3.9g/cm3, and working temperature from 1000-1800°C. It offers a combination of superior mechanical strength and electrical properties, wear resistance and corrosion resistance.

ceramic tube features and advantage

1.Great mechanical strength

2.Low thermal conductivity

3.High heat resistance

4.High softening temperature

5.Small thermal expansion coefficient

6.Good cold-resistance heat-resistance

7.Resistance to acid and alkali corrosion

8.Long service life

ceramic tube common series

1. Protector tube series

Material: Corundum

Use: Protector tube and temperature tube of thermocouple thermometer, carbon determinator, sulfur deteminator and combustion pipe of metallurgy, iron and steel, chemical analysis.

Feature: Great mechanical strength, good thermal conductivity, great resistance to heat impact, high softening temperature, good insulation and high-frequency characteristics under high temperature and resistance to chemical corrosion.

2. Insulation tube series

Material: Corundum

Use: For thermocouple, interval and insulation between couple wires. For specifications, there are single hole, double holes, four holes and multi-holes. For form, there are round and oval pipes.

Features: Great mechanical strength, good resistance to thermal impact, good insulation and high-frequency characteristics under high temperature. Breakdowm voltage and volume resistance and self-reactance are great and thermal expansion coefficient is small.

3. Through tube series

Material: Corundum

Use: Inner liner tube and heating tube in electric furnace, heat treatment furnace and toughened furnace, chlorine pipe for production of alchlor and electric heating pipe in the tin trough in the production line of float glass.

Features: Great mechanical strength, good resistance to thermal impact, high softening temperature, good chill and abrupt heat properties, small thermal expansion coefficient and resistance to acid and alkali corrosion.

ceramic tube Chief technical parameters

Chemical competent	Al2O3	≥99.5%
	SiO2	<0.2%
	Fe2O3	<0.1%
Alkaline matter		<0.1%
Density		3.9 g/cm3
Hardness		9 M
Water absorption		<0.1%
Rupture  strength		>2000kg/cm2
Gas tightness		Kept for ten minutes at negative pressure of 1.3Kpa. The pressure drop is less than 0.3Kpa.
Thermal tolerance		Insert the pipe into the furnace at a depth of 20mm. Heat to 1600℃ and maintain for 30 minutes.
Alkali tolerance		In the Na2CO3 solution of 2N concentration, boil for 15 hours with the weight loss not greater than 20mg/dm2.
Volume resistance		>9*10(5) Ω·cm/1600℃
Breakdown voltage		20kv/cm
Expansion coefficient		8*10(-8)
Temperature for use		Long-term: 1600℃  Short-term: 1800℃
Chill and abrupt heat		1500℃~room temperature not cracking thrice.

AL2O3% Composition	Density (g/cm3)	Flexural Strength (MPa)	Thermal Conductivity [w/(m.R)]	Dielectric Strength (KV/mm)	Working Temp.
60	3.0	205	16	10	1000°C
75	3.1	280	17	10	1250°C
80	3.3	215.7	17	10	1290°C
85	3.4	230	17	10	1350°C
92	3.6	312	18	10	1390°C
95	3.7	304	20	10	1480°C
99	3.81	340	34	10	1600°C
99.7	3.85	370	35	10	1700°C

Packaging & Shipping

Package of ceramic tube : wooden case.

We also provide OEM service, the package can be designed according to your requirements.

Shipping of ceramic  tube: By vessel or by train from any Chinese port, Samples can be delivered by International express.

package pictures of ceramic tube

Our Services

1.Timely response,

Timely response to your inquiry, multiple choice recommendations based on your demand,quickly respond mails and provide solutions.

2.Sample evaluation

ceramic heater tube sample and trial order are accepted for the quality evaluation

3.Strict quality control

Arrange production on time and control quality strictly.

4.Shorter delivery time.

Book the earliest vessel or plane to guarantee the delivery time.

5.Professional Services

Provide all the detailed news and pictures from order to delivery;

Offer relative export documents and original certificate if needed;

Warm and considerable after-sale service