Alumina Ceramic Furnace Tubes
- YUNXING
- China Jinzhou
- 5-30 Days
- 5,000 -10,000/month(Looking for distributors)
1.Alumina Ceramic Furnace Tubes are products made from the chemical compound with the same name ,alumina ceramic. Alumina ceramic, also known as aluminum oxide, is a combination of aluminum and oxygen.
2.Alumina Ceramic Furnace Tubes is extremely hard and durable, resistant to compressive strength, resistant to weathering, resistant to chemicals, electrically insulating, highly dense and stiff and incredibly thermally conductive.
3.Alumina Ceramic Furnace Tubes is up to twenty times more thermally conductive than the majority of other oxides.
Alumina Ceramic Furnace Tubes
My factory looking for distributors.
Advantage of alumina ceramic furnace tubes
1. Alumina Ceramic Furnace Tubes are products made from the chemical compound with the same name ,alumina ceramic. Alumina ceramic, also known as aluminum oxide, is a combination of aluminum and oxygen.
2. Alumina Ceramic Furnace Tubes is extremely hard and durable, resistant to compressive strength, resistant to weathering, resistant to chemicals, electrically insulating, highly dense and stiff and incredibly thermally conductive.
3. Alumina Ceramic Furnace Tubes is up to twenty times more thermally conductive than the majority of other oxides.
4. Alumina Ceramic Furnace Tubes is quite cost effective. These qualities make alumina ceramics ideal for a wide variety of industrial and commercial applications.
Application of alumina ceramic furnace tubes
1. Alumina Ceramic Furnace Tubes are often used in various tube furnaces, vacuum furnaces, heating furnaces and high temperature furnaces.
2. The purpose of the Alumina Ceramic Furnace Tubes is to be used as the lining of various test electric furnaces, which mainly separates the heating element from the burned test substance, closes the heating area and places the burned test substance.
3. Alumina Ceramic Furnace Tubes have a wide range of applications, involving high temperature test and analysis equipment in various industries, such as coal test and analysis equipment, metallurgical powder test and analysis equipment, chemical and glass industry test and analysis equipment, etc.
Alumina Tube(open both ends)(slip casting) Specification Table
Number | SPEC: OD x ID |
LENGTH MM |
Number | SPEC: OD x ID |
LENGTH MM | ||
INCH | MM | INCH | MM | ||||
1 | 0.197x0.118 | 5x3 | ≤800 | 32 | 1.126x0.886 | 28.6x22.5 |
≤1800 |
2 | 0.236x0.157 | 6x4 |
≤1300 | 33 | 1.181x0.827 | 30x21 | |
3 | 0.250x0.125 | 6.4x3.2 | 34 | 1.181x0.906 | 30x23 | ||
4 | 0.250x0.157 | 6.4x4 | 35 | 1.260x0.984 | 32x25 | ||
5 | 0.250x0.188 | 6.4x4.8 | 36 | 1.375x1.125 | 34.9x28.6 | ||
6 | 0.276x0.157 | 7x4 | 37 | 1.378x1.063 | 35x27 | ||
7 | 0.276x0.197 | 7x5 | 38 | 1.496x1.181 | 38x30 | ||
8 | 0.315x0.197 | 8x5 | 39 | 1.575x1.181 | 40x30 | ||
9 | 0.354x0.236 | 9x6 |
≤1600 | 40 | 1.654x1.339 | 42x34 | |
10 | 0.375x0.250 | 9.6x6.4 | 41 | 1.750x1.500 | 44.5x38.1 | ||
11 | 0.394x0.236 | 10x6 | 42 | 1.811x1.496 | 46x38 | ||
12 | 0.394x0.276 | 10x7 | 43 | 1.875x1.625 | 47.6x41.3 | ||
13 | 0.433x0.276 | 11x7 | 44 | 1.969x1.575 | 50x40 | ||
14 | 0.472x0.236 | 12x6 | 45 | 2.000x1.750 | 50.8x44.5 | ||
15 | 0.472x0.315 | 12x8 | 46 | 2.250x2.000 | 57.2x50.8 | ||
16 | 0.472x0.355 | 12x9 | 47 | 2.283x1.890 | 58x48 | ||
17 | 0.500x0.250 | 12.7x6.4 | 48 | 2.362x1.96 | 60x50 | ||
18 | 0.500x0.375 | 12.7x9.5 | 49 | 2.500x2.250 | 63.5x57.2 | ||
19 | 0.551x0.394 | 14x10 | 50 | 2.559x2.165 | 65x55 | ||
20 | 0.591x0.394 | 15x10 |
≤1800 | 51 | 2.750x2.500 | 69.9x63.5 | |
21 | 0.630x0.472 | 16x12 | 52 | 2.756x2.362 | 70x60 | ||
22 | 0.669x0.472 | 17x12 | 53 | 2.956x2.561 | 75x65 | ||
23 | 0.688x0.437 | 17.5x11.1 | 54 | 3.000x2.750 | 76x70 | ||
24 | 0.750x0.512 | 19.1x13 | 55 | 3.150x2.675 | 80x68 | ||
25 | 0.787x0.591 | 20x15 | 56 | 3.500x3.125 | 88.9x79.4 |
≤1600 | |
26 | 0.866x0.630 | 22x16 | 57 | 3.543x3.150 | 90x80 | ||
27 | 0.866x0.669 | 22x17 | 58 | 3.937x3.543 | 100x90 | ||
28 | 0.945x0.709 | 24x18 | 59 | 4.000x3.650 | 101.6x93 | ||
29 | 1.000x0.750 | 25.4x19.1 | 60 | 4.331x3.937 | 110x100 |
≤1500 | |
30 | 1.063x0.669 | 27x17 | 61 | 4.500x4.125 | 114.3x105 | ||
31 | 1.063x0.787 | 27x20 | 62 | 4.724x4.331 | 120x110 | ||
Insulation tube (extrusion) Specification Table
Number | 1 Bore tube SPEC: OD x ID | LENGTH MM | |
INCH | MM | ||
1 | 0.031x0.011 | 0.8x0.3 |
≤18500 |
2 | 0.039x0.019 | 1x0.5 | |
3 | 0.059x0.024 | 1.5x0.6 | |
4 | 0.079x0.039 | 2x1 | |
5 | 0.100x0.050 | 2.5x1.3 | |
6 | 0.118x0.059 | 3x1.5 | |
7 | 0.118x0.079 | 3x2 | |
8 | 0.125x0.063 | 3.2x1.6 | |
9 | 0.157x0.079 | 4x2 | |
10 | 0.197x0.118 | 5x3 | |
11 | 0.236x0.118 | 6x3 | |
12 | 0.236x0.157 | 6x4 | |
13 | 0.250x0.125 | 6.4x3.2 | |
14 | 0.250x0.157 | 6.4x4 | |
15 | 0.250x0.188 | 6.4x4.8 | |
16 | 0.276x0.197 | 7x5 | |
17 | 0.315x0.197 | 8x5 | |
18 | 0.354x0.236 | 9x6 | |
19 | 0.374x0.250 | 9.5x6.35 | |
20 | 0.394x0.236 | 10x6 | |
21 | 0.433x0.276 | 11x7 | |
22 | 0.472x0.315 | 12x8 | |
Alumina ceramic performance index (Notice of Correct in Leakeage Rate）
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | — |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Compressive strength | MPa | 2300 |
6 | 20℃ leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600℃ |
8 | Bonding in high temperature | not bonded in 1600℃ | |
9 | 20—1000℃ coefficient of thermal expansion | mm.10-6／℃.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20℃direct current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000℃ MΩ | ≥0.08 |
1300℃ MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550℃ | |
15 | Maximum working temperature | ℃ | 1800 |
16 | Hardness | Mohs | 9 |
17 | Flexural strength | Mpa | 350 |
Evaluating the Temperature Resistance of Alumina Ceramic Furnace Tubes
Assessing the temperature resistance of alumina ceramic furnace tubes is crucial to ensure their suitability for
high-temperature applications. Here are several key methods for evaluating their temperature resistance:
1. Material Specifications: Start by reviewing the manufacturer's specifications for the alumina ceramic tubes. Look for the
maximum continuous operating temperature (often denoted as Tmax) and the temperature range over which the tubes
maintain their structural integrity.
2. Thermal Conductivity: Consider the thermal conductivity of alumina ceramics. Higher thermal conductivity can help
distribute heat more evenly across the tube's surface, reducing the risk of localized hotspots that could lead to thermal
stress and failure.
3. Thermal Expansion Coefficient: Examine the thermal expansion coefficient of the alumina ceramic material. A low
coefficient indicates minimal dimensional changes with temperature variations, enhancing the tubes' resistance to
thermal stress and potential cracking.
4. Thermal Shock Testing: Perform thermal shock testing on sample tubes. This involves subjecting the tubes to rapid
temperature changes, such as heating them to a high temperature and then rapidly cooling them. Evaluate the tubes
for any signs of cracking, spalling, or structural damage after repeated thermal shock cycles.
5. Finite Element Analysis (FEA): Utilize FEA software to simulate the thermal behavior of alumina ceramic furnace tubes
under different temperature conditions. FEA can predict areas of thermal stress concentration and help optimize tube
design for enhanced temperature resistance.
6. Real-World Performance: Consider real-world performance data and case studies from similar applications. Assess
how alumina ceramic furnace tubes have performed in actual operating environments with varying temperature profiles
and exposure durations.
7. Consultation with Experts: Seek guidance from materials engineers, ceramics specialists, or suppliers experienced in
high-temperature applications. They can provide insights into the factors influencing temperature resistance and
recommend suitable alumina ceramic tube options based on your specific requirements.
By employing a combination of these evaluation methods, you can effectively assess the temperature resistance of
alumina ceramic furnace tubes and make informed decisions regarding their use in demanding thermal environments.
Chemical Compatibility Assessment of Alumina Ceramic Furnace Tubes
Alumina ceramic furnace tubes play a crucial role in high-temperature applications across various industries, including
metallurgy, chemical processing, and semiconductor manufacturing. The chemical compatibility of these alumina tubes is a critical
aspect that directly influences their performance and longevity in such demanding environments.
Alumina ceramic, primarily composed of aluminum oxide (Al2O3), exhibits excellent chemical resistance to a wide range of corrosive substances. Its high purity and inert nature make it suitable for handling acids, bases, and other harsh chemicals commonly encountered in industrial processes.
Alumina ceramic furnace tubes demonstrate remarkable resistance to acidic environments. They withstand exposure to strong acids such as hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3), and hydrofluoric acid (HF) without significant degradation. This property is particularly advantageous in applications involving acid leaching, chemical synthesis, and acid digestion processes.
3. Alkaline Resistance:
Similarly, alumina ceramic exhibits excellent resistance to alkaline solutions. It maintains its structural integrity when exposed to alkalis like sodium hydroxide (NaOH), potassium hydroxide (KOH), and ammonia (NH3). This alkaline resistance is beneficial in industries where alkaline cleaning agents or solutions are used to remove contaminants or residues.
In addition to liquids, alumina ceramic furnace tubes exhibit compatibility with gases encountered in high-temperature operations. They withstand exposure to hydrogen (H2), nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and other gases without undergoing chemical reactions or structural deterioration.
One of the key advantages of alumina ceramic is its exceptional temperature stability. These alumina tubes can withstand extreme temperatures ranging from several hundred to over a thousand degrees Celsius without losing their mechanical strength or chemical resistance properties. This makes them ideal for applications involving rapid thermal cycling and prolonged exposure to high heat.
The chemical compatibility assessment of alumina ceramic furnace tubes highlights their suitability for handling a wide range of corrosive substances, including acids, bases, solvents, and gases. Their resistance to chemical attack, coupled with temperature stability, makes them indispensable components in high-temperature processes across various industries, ensuring reliable performance and extended service life.
Understanding the Mechanical Strength of Alumina Ceramic Furnace Tubes
1. Flexural Strength
Flexural strength determines the tube's ability to resist bending or deformation under external forces. A higher flexural strength ensures better resistance to mechanical stresses.
Alumina ceramic also possesses impressive compressive strength, making them capable of enduring heavy loads and pressure fluctuations in industrial settings.
Alumina ceramic furnace tubes are engineered to have good impact resistance. They can withstand sudden impacts or shocks to a certain extent without fracturing, ensuring durability in dynamic operating conditions.
4. Thermal Shock Resistance:
Alumina ceramic exhibits excellent thermal shock resistance, allowing it to endure thermal cycling from extreme heat to rapid cooling without compromising its structural integrity.
The hard surface of alumina ceramic reduces wear from abrasive particles or harsh environments, contributing to their long-term performance and minimal maintenance requirements.
Our factory
Jinzhou Yunxing Industrial Ceramics Co., Ltd. was established in 2000, mainly producing various types of tubular ceramic products and various industrial parts with alumina content above 99.3%. The factory covers an area of 4000 square meters.
The company's main products are: alumina ceramic tubes, alumina ceramic crucibles, alumina ceramic rods, alumina ceramic boats, alumina ceramic plates, alumina ceramic parts, etc.
The company currently has 3 1800 ° C high-temperature furnaces and 2 1400 ° C low-temperature kilns independently designed and manufactured. The molding process is mainly based on grouting molding, and has other molding process equipment such as extrusion and hot die casting.
The company has 105 employees, including one senior ceramic engineer, three engineers, six overseas sales staff, and four professional after-sales staff.
FAQ
Q1. Can alumina ceramic furnace tubes be reused?
Yes, alumina ceramic furnace tubes can indeed be reused after they've been used, as long as they remain undamaged and free from
any contamination. It's essential to thoroughly clean and inspect them to confirm that they're still in good condition and suitable
for future use.
Q2. Is it safe to use alumina ceramic furnace tubes in high-pressure applications?
Indeed, alumina ceramic furnace tubes are well-suited for high-pressure applications. Their exceptional mechanical strength, combined
with resistance to thermal and chemical stresses, renders them capable of withstanding rigorous conditions.
Q3. Can alumina ceramic furnace tubes withstand rapid temperature changes?
Certainly, alumina ceramic furnace tubes demonstrate commendable thermal shock resistance, enabling them to endure rapid
temperature fluctuations without experiencing cracks or fractures.
Q4. Can alumina ceramic furnace tubes be customized according to specific environments?
Indeed, numerous suppliers provide the option to customize alumina ceramic furnace tubes according to specific requirements. This
customization may involve modifications to dimensions, form, and the incorporation of additional features, ensuring alignment
with the precise needs of your application.
Q5. How long can alumina ceramic furnace tubes be used?
The durability of alumina ceramic furnace tubes can differ based on factors like application conditions, operational temperatures, and
maintenance proced.
Certificate
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