Product Introduction
AgCdO Rivets are a powder metallurgy composite electrical contact material with high-purity silver (Ag) as the matrix and cadmium oxide (CdO) as the functional dispersed phase. They are manufactured through cold pressing, protective atmosphere sintering, and precision riveting.
Technical Parameters
|
Grade |
CdO Content (wt%) |
Electrical Conductivity (% IACS) |
Hardness (HV) |
Density (g/cm³) |
Microstructure Control |
|
AgCdO10 |
9.5–10.5 |
≥68 |
≥75 |
≥10.1 |
CdO ≤ 5 μm |
|
AgCdO12 |
11.5–12.5 |
≥65 |
≥80 |
≥10.0 |
CdO ≤ 5 μm |
|
AgCdO15 |
14.5–15.5 |
≥60 |
≥85 |
≥9.9 |
CdO ≤ 5 μm |
Key Features
Excellent resistance to arc erosion
Uniformly dispersed cadmium oxide (CdO) improves arc energy dissipation and reduces material transfer, thereby enhancing contact stability and lifespan under high-load switching conditions.
Stable low contact resistance
The high-purity silver matrix ensures continuous conductivity, maintaining low and stable contact resistance even with prolonged use and slight surface oxidation.
Strong anti-adhesion properties
CdO enhances the material's hardness and thermal stability, effectively reducing contact adhesion under high-inrush current conditions such as motor startup.
High wear resistance
The dense powder metallurgy structure improves mechanical strength and wear resistance, making it suitable for high-frequency switching applications.
Manufacturing Process
Raw Material Control: High-purity silver powder (≥99.95%) and high-purity CdO powder are used, and particle size control ensures material consistency.
Mixing and Dispersion Control: A multi-stage mixing process ensures uniform distribution of CdO within the silver matrix, reducing the risk of agglomeration.
Cold Pressing: High-tonnage pressure is used to press the blank into a green body, improving initial density and structural stability.
Protective Atmosphere Sintering: Sintering is performed under controlled atmosphere conditions to achieve a stable composite structure of the silver matrix and CdO.
Precision Riveting: Multi-station cold heading equipment is used to ensure dimensional consistency and assembly compatibility.
Stress-Relief Annealing: Processing stress is eliminated, improving material stability and conductivity consistency.
Quality Inspection: Inspection items include: Contact Resistance, Hardness, Density, Dimensional Tolerances, and Appearance Defects.
Application Areas
Relay Industry
Power Relay Contacts / Intermediate Relay Contacts
01
Industrial Control
Contactor Main Contacts / Motor Control Switches
02
Automotive Electronics
12V/24V Relay Modules / Control Switches
03
Low-Voltage Electrical Appliances
MCB / MCCB Contact Systems
04
HVAC Systems
Compressor Start Switches / Temperature Controllers
05
Customized Engineering Capabilities
- Customized CdO Content (adjustable within 10%–20%)
- Customized Rivet Size (Diameter / Height / Head Type)
- Customized Electrical Properties (Contact Resistance / Current Rating)
- Customized Structure (Single Metal / Bimetal / Triple Composite)
- Customized Packaging (Tape & Reel / Tray / Vacuum Pack)
- Drawing Development Support (DFM Assessment ≤48 hours feedback)
Why Choose Us?
Stable Scaled Manufacturing Capabilities: We possess mature powder metallurgy and precision cold heading production lines, supporting continuous batch delivery and long-term supply stability.
Engineering-Grade Quality Control System: We implement multi-stage quality control from raw powder materials to finished products, ensuring batch consistency and electrical performance stability.
Export-Oriented Production Experience: Our products have long been used in the industrial electrical export market, and we are familiar with the electrical standards and procurement processes of different countries.
Engineering Support Capabilities: We can provide material selection advice based on customer load conditions, breaking frequency, and lifespan requirements, rather than just selling individual products.
Traceable Production System: All product batches are traceable to raw materials and production records, supporting long-term quality analysis and supply chain auditing.
FAQ
Q: What is Silver Cadmium Oxide (AgCdO) used for?
A: AgCdO is used in medium to high-load electrical switching devices such as relays, contactors, circuit breakers, and automotive switches, where strong arc resistance and anti-welding performance are required.
Q: What are the main advantages of AgCdO compared to pure silver contacts?
A: AgCdO offers significantly better arc erosion resistance and anti-welding performance than pure silver, making it more suitable for high inrush current and frequent switching applications.
Q: What current range is AgCdO suitable for?
A: It is typically used in low to medium voltage applications, generally in the 10A–50A range depending on contact design, geometry, and system conditions.
Q: Do you provide RoHS and REACH compliance documents?
A: Yes. We can provide RoHS/REACH compliance statements and third-party test reports (such as SGS) based on customer and market requirements.
Q: Can AgCdO rivets be customized?
A: Yes. We support customization of alloy grade (AgCdO10/12/15), dimensions, rivet structure, electrical performance, and packaging solutions.
Q: What is the typical electrical life of AgCdO contacts?
A: Depending on load conditions and application design, the typical electrical life ranges from 10⁵ to 10⁶ switching cycles.
Q: Do you offer alternative materials to AgCdO?
A: Yes. For environmentally restricted applications, we provide cadmium-free alternatives such as AgSnO₂ and AgNi with comparable performance in specific operating conditions.
Q: Can you support engineering drawing evaluation?
A: Yes. We support 2D/3D CAD file evaluation (STEP, DWG, IGS) and provide DFM feedback within 48 hours.
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