Alumina ceramic tube

Last Updated on May 10, 2021 by You Ling

What’s this?

Alumina ceramic, (Al₂O₃). In He-Shuai company, we mainly offer advanced customized service to our clients. Alumina ceramic belongs kind of industry ceramic. Alumina is its main material. And its feature is high hardness, long-wearing, only can be formed by diamond grinding. It has a huge range of industrial applications. And the shape has the tube, ring, disc, rod, plate … other special shapes.

Custom Industrial Ceramic part is getting more and more popular in the world. We have very good production technology to improve the quality. And offering the alumina ceramic in various shapes and dimensions and made to a tight tolerance. It is your exceptional products at an affordable price.

How many models you have?

We have hundreds of normal standard models for your reference. Some of alumina cermaic have enough stocks.but some of others haven’t. So, Contact us today if you need special size .welcome to custom made product from He-Shuai Ltd.

Alumina Ceramic: Common Shapes and Sizes
- Alumina Ceramic Thermocouple-protection Tube Closed One End

Material and Features:

			95%series		99%series		99.5%series
A l2O3 ( % )			≥95		≥99		≥99.5
SiO 2 (%)			＜0.3		＜0.2		＜0.04
Fe2O3 (%)			＜0.1		＜0.1		＜0.05
Alkaline substances (%) Density (g/cm3 )			＜0.1 3.7		＜0.1 3.87		＜0.08 3.89
Hardness (M0hs)			8.8		9		9
Expansion coefficient (10-6 K-1 )			8.5		8.1		7.6
Operating temperature in short time ( ℃ ）			1650		1800		1850
Operating temperature in long time ( ℃ )			1530		1650		1700
Color			pink ,white		white,ivory		ivory
Standard dimension(mm)
Outer diameter	6	8		10		12		16
Length	1000	1500		2000		2000		2500
Outer diameter	20	25		30-35		40-45		50-55
Length	2500	2500		2000		2000		2000
Outer diameter	60-65	70-75		80-85		90-95		100
Length	2000	2000		2000		2000		1700

Furnace Tube

Material and Features:

80series

95series

97series

99series

995series

Manufacturing Process:

extrusion processing

slip casting

Service Temp. (℃)

1350

1530

1600

1650

1700

A l2O3 ( % )

≥80

≥95

≥97

≥99

≥99.5

Rate of water absorption (%)

≤8.5

≤0.01

Anti-bending strength (Mpa)

≥55

≥275

≥285

≥300

≥350

Thermal shock resistance

Excellent

Max. service Temp. (℃)

1420

1750

1800

1850

1900

standard sizes (mm)

80series

95series

97series

99series

995series

Outer diameter

40-150

40-200

40-150

Wall thickness

5-15

4-7

4-20

4-7

Length

5500

2000

Attention

In order not to affect the service life of the furnace tube, recommended maximum heating rate and cooling rate are from 10 to 20 ℃ /
In consideration of the heat-expansion and cold-contraction principle, Please try to avoid the furnace tube touching the high temperature or cool object
Furnace tube will appear tiny cracks after a period of time, which is normal phenomenon while the cracks will not affect the use, and can be repaired with aluminum oxide
Recommended not pass into corrosive If you want to pass into highly corrosive substances such as S, Na, etc., special treatment is needed on the furnace tube.
High temperature solution can not be leaked into the furnace tube, While base plate and alumina powder can isolate the furnace

Alumina Ceramic Tube (Isostatic Processing)

Material and Features:

	95%series	99%series	99.5%series
A l2O3 ( % )	≥95	≥99	≥99.5
SiO 2 (%)	＜0.3	＜0.2	＜0.04
Fe2O3 (%)	＜0.1	＜0.1	＜0.05
Alkaline substances (%) Density (g/cm3 )	＜0.1 3.7	＜0.1 3.87	＜0.08 3.89
Hardness (M0hs)	8.8	9	9
Expansion coefficient (10-6 K-1 )	8.5	8.1	7.6
Operating temperature in a short time ( ℃ ）	1650	1800	1850
Operating temperature in a long time ( ℃ )	1530	1650	1700
Color	pink, white	white, ivory	ivory

Alumina ceramic tubes (Isostatic Processing)can be supplied in longer lengths (up to 1250mm long). We can also custom-cut shorter lengths to your specifications. The tube’s outer diameter range from 10mm – 800mm.

4.4 High Temperature Ceramic Roller

Material and Features:

	LC-A	LC-B	LC-C	LC-D
Max. service Temp. (℃)	1220	1280	1350	1450
A l2O3 ( % )	≥70	≥75	≥80	≥85
Rate of water absorption (%)	≤11	≤9	≤8.5	≤7.5
Anti-bending strength (Mpa)	≥40	≥45	≥51	≥58
Thermal shock resistance	Excellent	Excellent	Excellent	Excellent
Refractory degree (℃)	≥1700	≥1750	≥1800	≥1860
standard sizes (mm)
Outer diameter 20	25	27	30	33.7
Length 2800	2800	3100	3300	3500
Outer diameter 35	40	42	45	48
Length 3600	3600	3600	4200	4200
Outer diameter 50	52	55	60	65
Length 4400	4500	4700	4800	4800

For the tubes of the above sizes, we have available stocks. We can also custom cut shorter lengths to your speciﬁcations. Other sizes are available on request.

4.5 Alumina ceramic rod

Material and Features:

	95%series	99%series	99.5%series
A l2O3 ( % )	≥95	≥99	≥99.5
SiO 2 (%)	＜0.3	＜0.2	＜0.04
Fe2O3 (%)	＜0.1	＜0.1	＜0.05
Alkaline substances (%) Density (g/cm3 )	＜0.1 3.7	＜0.1 3.87	＜0.08 3.89
Hardness (M0hs)	8.8	9	9
Expansion coefficient (10-6 K-1 )	8.5	8.1	7.6
Operating temperature in a short time ( ℃ ）	1650	1800	1850
Operating temperature in a long time ( ℃ )	1530	1650	1700
Color	pink, white	white, ivory	ivory

standard dimension

Alumina ceramic rods can be supplied in longer lengths ( up to 2500 mm long). We can also custom cut shorter lengths to your speciﬁcations.The sizes of the tube’s outer diameter range from 0.8mm – 200mm. Custom Products: Triangular rod, square rod, Other Styles.

Alumina ceramic tube

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