99% Alumina Ceramic Resistor Cores for Electrical Equipment

Alumina Ceramic Resistor Cores for Electrical Equipment

Product Description

Alumina Ceramic Resistor Cores working with their superior electrical insulation, high-temperature resistance, mechanical strength, and chemical stability, are the most widely used insulating ceramic components in electrothermal, power electronics, and high-temperature industrial fields. Compared to traditional insulating materials (mica, glass, engineering plastics), they can operate stably for extended periods under conditions of over 1000℃, high voltage, and strong corrosion, extending their service life several times over. Furthermore, their custom-designed irregular shapes can accommodate complex installation requirements, making them a key insulation solution replacing metallic and non-metallic materials in heating equipment, electrical devices, and high-temperature furnaces.

Product Specifications

1. Standard dimensions:outer diameter φ5~φ200mm
2. Inner diameter φ2~φ180mm
3. Length 10~1500mm
4. Flanges, threads, slots, steps, and other irregular structures can be customized
5. Tolerance accuracy up to ±0.01mm,surface roughness Ra≤0.2μm; wall thickness range 0.3~20mm
6. Thin-walled/thick-walled customization supported

Product Key Features

1. Excellent High-Temperature Resistance: Utilizing a high-purity alumina ceramic matrix (over 95%), it can operate stably for extended periods in environments exceeding 1000°C, exhibiting a low coefficient of thermal expansion and excellent thermal shock resistance.

2. Superior Electrical Insulation: Alumina ceramics possess extremely high volume resistivity and surface resistivity, maintaining excellent insulation performance even under high-temperature conditions, ensuring circuit safety and reliability.

3. Stable Resistance Characteristics: High resistance accuracy, low temperature coefficient, minimal resistance drift over long-term use, and excellent load stability and anti-aging capabilities.

4. Excellent Mechanical Strength: The ceramic tube boasts high hardness, strong wear resistance, and superior compressive and bending resistance, adaptable to installation and usage requirements in complex industrial environments.

5. Good Chemical Stability: Resistant to acid and alkali corrosion, with strong oxidation resistance, it maintains stable performance even in harsh chemical environments, resulting in a long service life.

Main Technical Parameters

Applications

1. Power electronic equipment: current limiting, voltage dividing, and load resistors in frequency converters, inverters, and power modules
2. Industrial furnaces: heating elements and temperature measuring auxiliary resistors in high-temperature furnaces and heat treatment equipment
3. Rail transit: traction systems and braking resistor units
4. New energy: photovoltaic inverters, wind power converters, and energy storage systems
5. Home appliances: high-temperature circuit protection for induction cookers, ovens, water heaters, etc.
6. Medical devices: precision resistor components in high-frequency electrosurgical units and medical imaging equipment

Customization Services

We can provide personalized customization solutions based on customer needs, including:

1.special size specifications (diameter, length, lead type)

2.specific resistance values ​​and accuracy requirements

3.surface coating treatments (moisture-proof, explosion-proof, toughening)

4.special end cap and lead materials (copper, stainless steel, nickel alloy, etc.)

Our workshop

Why choose us?

1.Customized R&D, rather than standard product adaptation

2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency

3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.

FAQ

Q1: What products does your company offer?

We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.

Q2: Can you customize non-standard parts?

Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.

Q3: What about accuracy and delivery time?

Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.

Q4: Main application areas?

Power, electronics, machinery, chemical, and aerospace industries.

Q5: Quality assurance measures?

Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.

Q6: Do you provide technical support?

We provide professional support such as material selection consultation, design optimization, and failure analysis.