High Purity Alumina Ceramic Tube Used in Industry

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Guangzhou
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100 pc
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100000 pc/month

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Product Description

Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness. Alumina has a high melting point, high hardness, although mechanical strength is reduced at temperatures above 1000 C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced.

Alumina is also an electrically insulating material, with a high electrical resistivity, increasing with purity. Good chemical stability of alumina leads to high corrosion resistance as well. It is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Testing has shown that the low chemical solubility of alumina ceramics components makes them highly resistant to chemical corrosion. This is what makes high purity alumina the material of choice for components in a wide range of industrial applications.

Ceramic tubes are used when electrical insulation is necessary in high heat applications. This makes them useful for supporting electric heating elements in ovens, heaters and furnaces. Ceramics hold their shape and size under pressure. This is important in switching applications where the ceramic is used to open and close electrical contacts in a thermostat or pressure switch. Ceramic parts are very abrasion resistant and offer long life in applications where other materials would wear out quickly.

Main Physical Properties:

1. Good electrical insulation
2. High mechanical strength
3. Excellent wear resistance
4. Excellent corrosion resistance
5. Low dielectric constant

Main Applications:

1. Pump seals and other components
2. Wear resistant inserts
3. Insulating washers or bushings
4. Semiconductor components
5. Aerospace components
6. Automotive sensors
7. Electrical or electronic insulators



Data Sheet

 

Characteristics

Unit

95 Al2O3

99 Al2O3

ZrO2

GPSi3N4

BN

Glass Ceramic

Crystal Structure

-

hexagonal

hexagonal

tetragonal

hexagonal

hexagonal

-

Color

-

white

ivory

white

gray

white

white

Density

g/cm³

3.65

3.88

5.95

3.22

2.26

2.55

Water Absorption

%

0

0

0

0

0.0-1.0

0

Young's Modulus

Gpa

280

350

205

295

670

65

Vickers Hardness

Gpa

14

20

12

18-20

-

-

Flexural Strength

Mpa

280

300

900

650

51

100

Compressive Strength

Mpa

2000

2500

2200

2200

230

500

Thermal Conductivity 

W/(m•K)

18-25

30

2.2

25

20

1.70

Thermal shock resistance

ΔT(C°)

220

180-200

280-350

450-650

>1500

25-100

Max. Working Temperature 

1500

1700

850

1200

960

800

Volume Resistivity

Ω . cm

>10^15

>10^14

>10^12

>10^14

10^13

10^16

Dielectric Constant

-

9.50

9.80

26

8.20

4.08

6.02

Dielectric Strength

kV/mm

16

22

-

16

375

40

 

FAQ

We have organized several common questions for our clients, may help you sincerely

 

--------What is the application of Ceramic Tubes?

1. Pump seals and other components
2. Wear resistant inserts
3. Insulating washers or bushings
4. Semiconductor components
5. Aerospace components
6. Automotive sensors
 

----------What advantages of Ceramic Tubes?

1. Good electrical insulation
2. High mechanical strength
3. Excellent wear resistance
4. Excellent corrosion resistance
5. Low dielectric constant

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Q:China Cup ceramic cup and what's the difference?
The bone is bone porcelain, the porcelain with a large amount of ash as raw material, Guzhici high whiteness, but more than ordinary ceramic to crisp. Some bone china now has no use for ashes, but other phosphorus containing materials instead of ashes.
Q:What's the function of the gas station in the ceramic factory?
Ceramic direct burning coal is not a good product, we must first transform the coal into water gas, in order to produce stable high-quality products. What's more, water gas is the cheapest fuel compared to natural gas, liquefied petroleum gas, diesel oil, and even coke oven gas.A gas station is something that converts coal into water gas.
Q:Classification of ceramics
Many kinds of special porcelain, a variety of oxide as the main body, such as high alumina porcelain, it is mainly to alumina, magnesia porcelain, Magnesium Oxide dominated; talc porcelain, porcelain with talc; beryllium or beryllium oxide, with beryl; zirconia ceramic, zirconia based on titanium porcelain with titanium oxide; mainly.The characteristics of the special porcelain is, by products not containing clay or contain very small amounts of clay, molding by dry pressing, high pressure method, in the defense industry, heavy industry in the use of such porcelain, such as rocket, baffle missile, aircraft, cars with spark plug in a semiconductor with radio. The rapid cutting of porcelain knife and so on.
Q:What kind of ceramic bowl can be used?
3, art ceramics purchaseChina's furnishings art ceramics, pottery and porcelain are divided into two categories. The main origin of Tao: known as the teapot and pot pottery - Jiangsu Yixing; Guangdong Shiwan pottery figure and animal shape is good; and in the production of pottery production in Henan Luoyang; Shanxi Hunyuan black glazed pottery; pottery production carved Sichuan Rongchang. The main origin of porcelain: in the production of blue and white, delicate, pastel colored glaze, the four traditional porcelains of Jiangxi porcelain Jingdezhen; known for its colorful Youxia decorative art porcelain in Hunan and Liling; the production and innovation of glaze porcelain carving art Shandong Zibo and ivory porcelain glaze production; Hebei Handan; the production of white porcelain Fujian Dehua; Zhejiang Longquan celadon production and production; color glaze porcelain flower of Guangdong Chaozhou; production imitation art porcelain Zhejiang Xiaoshan kiln etc..Furnishings art porcelain as a commodity, the price is not the higher the better, it needs to be seriously identified. For example, under glaze and the blue and white porcelain, to see whether the skilled painting work, clear whether Yingrun color, transparent, note the people aesthetic bogus Youxia, genuine; Youxia style decorative meticulous attention, must be hand drawn, not printing, decals, and colors to light.Again is to see the overall effect, whether Zhou Zheng, there is no deformation, glazed surface is smooth, and whether the color of the same. Finally, the choice of furnishings, art ceramics, in the light of the day where the light is often out of error. The porcelain can be gently percussion, listen to whether the sound loud and clear, the presence of cracks in the ceramic is hoarse.
Q:How do you wash the ceramic knife in color?
In addition, it is best to clean the food immediately after being cut off, and clean the fruit after the fruit is cut. Otherwise, the blade will turn yellow after a long time.Hope to help you, I wish a happy life, hope to adopt.
Q:What is the difference between pottery and porcelain?
The main differences between pottery and porcelain are as follows: first, the firing temperature is different, pottery firing temperature is generally lower than porcelain, the minimum even reach 800 degrees Celsius, the highest can be about 1100 degrees celsius. Porcelain firing temperature is relatively high, mostly at more than 1200 degrees Celsius, and even some to about 1400 degrees celsius. Two, different degree of hard pottery firing temperature is low, the body is not completely sintering, struck a voice asked, hardness is poor, and some can even draw with knife grooves. The porcelain firing temperature is high, the basic matrix sintering, when knock sound is ringing, it is difficult to draw the carcass surface grooves with general steel. Three, the use of different raw materials, pottery using ordinary clay can be made into a billet firing, porcelain needs to select a specific material to kaolin on the billet. The firing temperature needed in pottery, can become like ancient pottery, white pottery is burnt. The clay made of kaolin at the temperature required for firing porcelain becomes porcelain. But the clay made of clay, usually made of pottery, can not be porcelain when it is fired to 1200 degrees centigrade. It will be burned into glass. Four, transparency is different, the body of pottery, even thinner, does not have translucent features. For example, Longshan culture pottery, as thin as eggshell, but not transparent. China has the characteristics of both the matrix thick, translucent. Five, glaze different, pottery has no hanging glaze and hanging glaze two kinds, hanging glaze pottery glaze at lower burning temperature can melt. There are two kinds of glazes in China, which can be burnt once in a high temperature with the carcass, and also in low temperature and high temperature, and then hung with low temperature glaze, second times low temperature.
Q:Brief introduction of honeycomb ceramics
Honeycomb ceramics can be made from a variety of materials. The main materials are: cordierite, mullite, aluminum titanate, activated carbon, silicon carbide, activated alumina, zirconium oxide, silicon nitride and cordierite, mullite, cordierite, aluminum titanate and other composite matrix. Activated carbon powder or granules made of ceramic honeycomb shape, greatly improve the treatment of water purification and wastewater treatment ability, especially in the pharmaceutical industry, antibiotics, vitamins, hormones and nucleic acid injection of various drugs such as injection, dehydration and decolorization to impurities etc.. Honeycomb ceramic can be divided into four categories: regenerator, filler, catalyst carrier and filter material. Ceramic honeycomb regenerative body heat capacity above 1000kJ/kg products, the highest use temperature more than 1700 DEG C, in heating furnace, heating device, soaking furnace, cracking furnace kiln fuel can be saved more than 40%, the yield increased by more than 15%, the temperature of exhaust gas is lower than 150 DEG C. Honeycomb ceramic filler filler than other shapes of greater surface area, better strength and other advantages, can make the vapor-liquid distribution more uniform, the bed resistance is reduced, the effect is better, and can prolong the service life, in the petrochemical, pharmaceutical and fine chemical industry as a filler effect is quite good.
Q:What are the new ceramic products?
Four modern ceramics of high value:Temperature resistant ceramicsJapan developed a full enough high temperature above 1700 degrees Celsius. The composite materials, the alumina powder by melting, cooling, and aluminum is made, its high strength, good processing performance, do not change at high temperature.Luminescent ceramicsThe introduction of foreign market of luminescent ceramics, it is used to screen printing on the tile glaze surface in the funeral, the picture to decentralization occurs only under irradiation of ultraviolet fluorescent pigment, fluorescent pigment and thermosetting resin and the mixed heating or bake at 800 degrees Celsius for processing method, the ceramics used for indoor wall dotted with common decorative effect.
Q:What kind of work does ceramic factory have?
The main types of ceramics factory: financial, cashier, exhibition hall, laboratory technician, quality inspector, warehouse staff, technicians, ordinary workers.The production process of ceramic factory will produce substances harmful to the body, long time working in ceramics factory may have what industrial disease silicosis, many people choose the temporary work for a period of time, then transferred to other jobs.
Q:The new hot ceramic perm, a few days can wash your hair?
After perm in order to maintain the best effect, the general third days after a perm about shampoo and hair to stereotypes, and do Hair Perm Treatment, in a timely manner to the hot after the hair to give some nutrients.Nursing methods:The recommended daily shampoo after a perm, choose strong moisture shampoo and hair conditioner, proper collocation, which can effectively repair damaged hair cuticle, and can prevent hair dry after a perm knotted phenomenon.The perm in the first three days, in order to maintain the effect of the perm, hair styling and perfect feeling, this time should avoid the use of hair sticks, straightening plate, curlers styling products, even in the three day after use less as far as possible.The daily use of wood or horn comb, comb, long-term use of such electrostatic comb, can prevent hair, scalp hair more favorable health, and the hair brush, do not use excessive force, such as a knot should first open the node, again from the top comb.In perm, blowing her hair is one of the focus should follow perm hair texture, curly hair, and when close to the dry hair, want a better nursing perm can appropriate use of elastin, increased hair hair elasticity and softness.

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