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Alumina Ceramic Concave Heater are precision ceramic heating elements made with high-purity alumina (Al₂O₃) ceramic as the substrate, incorporating a high-temperature resistance heating wire or thick-film circuit, and manufactured through a high-temperature co-firing process. Their unique concave structure design enables uniform heating of cylindrical, curved, or tubular objects, making them widely applicable in various precision heating scenarios.
High-temperature Alumina Ceramic Concave Heating Element
Product Description
The core advantage of Ceramic Heater lies in their customized concave structure design—perfectly conforming to curved workpieces for uniform heating without blind spots. Simultaneously, through the heat concentration effect, they improve thermal efficiency by more than 15% compared to planar heating elements, adapting to the personalized heating needs of multiple industries worldwide. The product supports a wide voltage input of 3.7V~380V, is compatible with both AC and DC, has a maximum operating temperature of 1000℃, can reach 600℃ within 20 seconds, boasts a thermal efficiency of over 95%, and a temperature control accuracy of ±5℃, eliminating localized overheating and power attenuation issues. It possesses excellent electrical insulation properties and mechanical strength, and can operate stably for a long time in harsh environments such as humidity, corrosion, and high vibration. It is widely applicable to home appliances, industrial manufacturing, medical, semiconductor, scientific research laboratories and other scenarios. It supports full-dimensional customization of size, concave depth, power, temperature and other dimensions, making it an ideal core component for various heating scenarios.
Product Specifications
1. Size: Diameter: standard 5mm~Φ280mm, customizable; Thickness: 0.3mm~6mm, standard 1.3mm/2.0mm/3.0mm; Concave depth: Customizable, standard 0.5mm~3mm
2. Electrical Parameters: operating voltage: 3.7V~380V (AC/DC universal), standard 12V/24V/110V/220V; Power: 1W~3000W, power density up to 50W/cm²
3. Temperature Parameters: maximum operating temperature 1000℃, standard operating temperature ≤800℃, temperature control accuracy ±5℃, fast heating speed (up to 600℃ in 20 seconds)
Product Core Features
| Features | Detailed Description |
| High-efficiency Heating | alumina ceramics have high thermal conductivity (≥20 W/m·K) and fast thermal response, reaching the set operating temperature within seconds after being powered on. |
| Concave Fit Design | the curved concave structure perfectly fits the cylindrical heated body, resulting in a large contact area and improving heat conduction efficiency by more than 30%. |
| Excellent Electrical Insulation | alumina ceramics have a volume resistivity ≥10¹⁴ Ω·cm and a breakdown voltage ≥15kV/mm, ensuring safety and reliability. |
| High Temperature Resistance | long-term operating temperature can reach 800°C~1000°C, and short-term temperature resistance can reach 1200°C. |
| High Mechanical Strength | mohs hardness ≥ 9, compressive strength ≥ 300 MPa, excellent thermal shock resistance |
| Corrosion Resistant and Oxidation Resistant | it has good chemical stability, is resistant to acid and alkali corrosion, resists oxidation and aging, and has a long service life (≥10,000 hours). |
| High Dimensional Accuracy | it is formed using precision molds, and the dimensional tolerance can be controlled within ±0.1mm. |
Main Technical Parameters
| Parameter Items | Technical Indicators |
| Substrate Material | 95% ~ 99% alumina ceramics (Al₂O₃) |
| Appearance and Structure | concave arc / semi-circular / custom arc |
| Heating Method | embedded resistance wire / thick film printed circuit |
| Rated Voltage | 12V ~ 380V (customizable) |
| Rated Power | 50W ~ 2000W (customizable) |
| Operating Temperature Range | room temperature ~ 1000°C |
| Surface Load | ≤40 W/cm² (depending on operating conditions) |
| Insulation Resistance | ≥100 MΩ (room temperature) |
| Compressive Strength | ≥1500V AC / 1min no breakdown |
| Thermal Efficiency | ≥95% |
| Service Life | ≥10,000 hours |
| Size Specifications | inner diameter Φ10mm ~ Φ200mm, thickness 2mm ~ 10mm (customizable) |
Working Principle
Alumina ceramic concave heating elements utilize the high thermal conductivity of ceramic materials and the Joule heating effect of resistive heating elements:
The concave design allows the heating element to make surface contact with the heated cylinder instead of point contact, significantly reducing thermal resistance and improving heat transfer efficiency.
Typical Application Scenarios
1.Industrial Heating Applications:
plastics machinery: injection molding machine and extruder barrel heating
packaging machinery: heat sealing machine and sealing machine heating modules
3D printing equipment: high-temperature nozzle auxiliary heating
2.Laboratory and Medical Equipment
analytical instruments: gas chromatograph, mass spectrometer with inlet heating
medical devices: blood analyzer, biochemical testing equipment with constant temperature module
experimental apparatus: tube furnace, small heated reaction vessel
3.Specialized Heating Applications
semiconductor equipment: wafer heating, CVD/PVD process auxiliary heating
new energy: lithium-ion battery formation equipment, fuel cell testing systems
food processing: small-scale baking equipment, coffee machine heating modules
4.Other customized applications: pipeline heat tracing, valve antifreeze; auxiliary heating for small boilers and water heaters; any precision scenario requiring curved, fitted heating.
Customized Services
We support full-dimensional customized production to meet your specific needs:
Quality Assurance
100% Inspection Before Leaving the Factory: 100% electrical performance testing + visual Inspection
Material Traceability: High-purity alumina raw materials, batch traceable
Stable Process: Isostatic pressing + high-temperature sintering, density ≥99%
Certification Support: RoHS, REACH and other environmental compliance reports available
Our workshop
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CNC Workshop |
Testing Room |
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Surface grinding Workshop |
Sintering Workshop |
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Circular Grinding Workshop |
Injection molding Machine Workshop |
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