Alumina Ceramic Roller
Product Information
Alumina ceramic rollers are high-performance industrial ceramic products primarily composed of alumina (Al₂O₃), and are key components of modern high-temperature roller kilns.
Material Composition: Typically, the alumina content is ≥95% to ensure excellent high-temperature performance and mechanical properties.
Product Features:
High Hardness: Rockwell hardness is HRA80-90, second only to diamond, far exceeding the wear resistance of wear-resistant steel and stainless steel.
Excellent Wear Resistance: Wear resistance is equivalent to 266 times that of manganese steel and 171.5 times that of high-chromium cast iron, extending equipment life by at least ten times.
Lightweight: Density is 3.6 g/cm³, only half that of steel, significantly reducing equipment load.
High Temperature Resistance: Excellent high-temperature resistance, with a maximum operating temperature of 1600℃. Simultaneously, it exhibits extremely reliable thermal stability and excellent thermal shock resistance for products fired up to 1400℃.
Specifications: Common diameter range is 12-80mm, length range is 1200-5300mm, and customization is available according to different kilns and production needs.
Usage Precautions: The inner cavities at both ends of the roller must be filled with refractory fiber cotton. A protective coating must be applied before entering the kiln and allowed to dry completely. During use, surface residue should be cleaned regularly. When replacing rollers, pay attention to the cooling rate and method to avoid damage caused by rapid heating or cooling.
Product Index
|
Techinical Index
|
G98
|
G96
|
A95
|
A93
|
V93
|
V90
|
H95
|
|
Water Absorption
|
3-5
|
4-6
|
4.5-7.5
|
5-8
|
6-8
|
6.5-8.5
|
5.5-7.5
|
|
Bending Strength (Room Temperature)
|
65-78
|
60-75
|
60-70
|
55-65
|
50-65
|
50-65
|
60-70
|
|
Bending Strength (Temperature 1350)
|
55-70
|
50-65
|
48-60
|
45-55
|
40-55
|
40-55
|
50-65
|
|
Bulk Density
|
2.9-3.1
|
2.7-2.9
|
2.6-2.8
|
2.5-2.7
|
2.45-2.65
|
2.4-2.6
|
2.65-2.85
|
|
Coefficient of Thermal Expansion
|
6.0-6.4
|
6.0-6.4
|
6.0-6.5
|
6.0-6.5
|
6.0-6.5
|
6.0-6.5
|
6.0-6.5
|
|
Thermal Shock Resistance
|
Very Good
|
Very Good
|
Very Good
|
Very Good
|
Very Good
|
Very Good
|
Very Good
|
|
Maximum Operating Temperafure
|
1400
|
1350
|
1300
|
1300
|
1250
|
1250
|
1300
|
|
Alumina Content (%)
|
79
|
78
|
77
|
76
|
75
|
75
|
77
|
1. Architectural Ceramics Industry: This is the primary application area for alumina ceramic rollers. In the roller kiln firing process of architectural ceramics such as wall tiles, floor tiles, antique tiles, and through-body tiles, the rollers directly support the ceramic blanks, achieving stable transmission at high temperatures (typically 1200–1450℃) to ensure uniform heating and firing of qualified products.
2. Daily-Use Ceramics Industry: Used in high-temperature firing kilns for daily-use ceramics such as bowls, plates, cups, and saucers, as well as ceramic sanitary ware (toilets, washbasins, etc.). The low thermal expansion characteristics of the rollers prevent deformation or breakage caused by sudden temperature changes, ensuring the appearance and quality stability of daily-use ceramic products.
3. Specialty Ceramics and Refractory Materials Industry: Suitable for high-temperature sintering kilns for industrial specialty ceramics (such as ceramic insulators, ceramic tool blanks, structural ceramic components), refractory bricks, and refractory material modules. These applications require higher high-temperature resistance from the rollers; alumina ceramic rollers with high alumina content (≥95%) can withstand extreme high temperatures of 1600℃.
4. Glass Deep Processing Industry: In glass annealing furnaces and heating section roller conveyor equipment for tempered glass production, alumina ceramic rollers can replace metal rollers, preventing metal rollers from sticking to the glass surface at high temperatures. Simultaneously, their excellent wear resistance extends the equipment's lifespan and ensures the surface smoothness of glass products.
5. Electronic Ceramics Industry: Used in the high-temperature firing process of electronic ceramic components (such as ceramic capacitors, piezoelectric ceramics, and magnetic ceramics). Electronic ceramics have stringent requirements for the stability of the firing environment. The low thermal shock and chemical inertness of alumina ceramic rollers prevent the rollers themselves from contaminating the ceramic components, ensuring that the performance parameters of the electronic components meet standards.
Company Profile
Shandong Robert New Material Co., Ltd. is located in Zibo City, Shandong Province, China, which is a refractory material production base. We are a modern enterprise that integrates the research and development, production, sales, kiln design and construction, technology, and export refractory materials. We have complete equipment, advanced technology, strong technical strength, excellent product quality, and good reputation. Our factory covers over 200 acres and an annual output of shaped refractory materials is approximately 30000 tons and unshaped refractory materials is 12000 tons.
Our main products of refractory materials include: alkaline refractory materials; aluminum silicon refractory materials; unshaped refractory materials; insulation thermal refractory materials; special refractory materials; functional refractory materials for continuous casting systems.
Frequently Asked Questions
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