| Customization: | Available |
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| Application: | Refractory, Structure Ceramic, Industrial Ceramic |
| Type: | Ceramic Parts |
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What are Ceramic Structural Parts
Ceramic structural parts are also called precision ceramic parts. The products mainly include high-voltage electrical insulators, pump components, nozzles, ceramic bearings, and dielectric components for semiconductor wafer processing.
In order to achieve the precision of the product, most ceramic structural parts need further finishing treatment after the sintering process is completed.
What is Metallization of Ceramic Structural Parts?
Metallization of ceramic structural parts refers to the creation of thin metal layers (films) on the surface of ceramic structural parts.
Ceramic surface metallization combines the good mechanical properties of ceramics and the excellent electrical and thermal conductivity of metal materials.
It not only has the excellent properties of high strength, high wear resistance, high temperature resistance and small thermal expansion coefficient of ceramic materials, but also has the plasticity and toughness properties of metal materials.
Is it Good to Use Ceramic Structural Parts?
You can see the advantages of ceramic structural parts through the comparative table between different material structural parts.
| Property | Ceramic | Metal | Polymer |
| Hardness | High | Low | Bad |
| Elastic Modulus | High | Good | Low |
| High Temperature Resistance | High | Low | Bad |
| Thermal Expansion | Low | Good | Good |
| Malleability | Low | Good | Good |
| Corrosion Resistance | Good | Low | Low |
| Electrical Conductivity | Low | Good | Low |
| Density | Average | High | Low |
| Thermal Conductivity | Average | Good | Low |
Our product production is mainly divided into 3 steps, forming - finishing - metallization. The production flow chart is shown below.
About Forming Method
There are mainly Dry Pressing, Hot Pressing, Isostatic Pressing, and Ceramic Injection Molding (CIM), each of which has its own advantages and disadvantages. We will choose the most suitable forming method on the basis of saving costs and ensuring quality.
About Finishing Process
In order to achieve the precision of the product, most ceramic structural parts need further finishing treatment after the sintering process. The main finishing processes we use are machining (lapping, polishing...) and glazing.
About Metallization Process
After the surface of the ceramic material is metallized, it has both the characteristics of ceramics and the properties of metal.
Introduction to Silver Firing Method
There are many methods for surface metallization of ceramic structural parts, and here we will focus on the silver firing method. The brief process of silver firing method is shown in the picture below.
The sintering mechanism of silver firing method is:
1. Reducing silver-containing raw materials into silver particles.
2. Melting the solvent into a melt.
3. The melt bonds the silver particles together to form a silver layer.
4. The silver layer is fixed on the ceramic surface.
| Category | Property | Unit | 99.8% Al2O3 |
99.5% Al2O3 |
99% Al2O3 |
95% Al2O3 |
94.4% Al2O3 |
| Mechanical | Density | g/cm3 | ≥3.95 | ≥3.90 | ≥3.85 | ≥3.65 | ≥3.60 |
| Water absorption | % | 0 | 0 | 0 | 0 | 0 | |
| Vickers hardness | HV | 1700 | 1700 | 1700 | 1500 | 1500 | |
| Flexural strength | Mpa | ≥ 390 | ≥ 379 | ≥ 338 | ≥ 320 | ≥ 312 | |
| Compressive strength | Mpa | ≥ 2650 | ≥ 2240 | ≥ 2240 | ≥ 2000 | ≥ 2000 | |
| Fracture toughness | Mpam1/2 | 4-5 | 4-5 | 4-5 | 3-4 | 3-4 | |
| Thermal | Max. Service temperature (non-loading) |
ºC | 1750 | 1675 | 1600 | 1500 | 1500 |
| CTE (Coefficient of thermal expansion) 20-800ºC |
1×10-6/ºC | 6.5-8.2 | 6.5-8.0 | 6.2-8.0 | 5.0-8.0 | 5.0-8.0 | |
| Thermal shock | T (ºC) | ≥ 200 | ≥ 200 | ≥ 200 | ≥ 220 | ≥ 220 | |
| Thermal conductivity 25ºC |
W/(m·k) | 31 | 30 | 29 | 24 | 22.4 | |
| Specific heat | 1×103J/(kg·k) | 0.78 | 0.78 | 0.78 | 0.78 | 0.78 | |
| Electrical | Volume resistivity 25ºC |
ohm·cm | > 1×1014 | > 1×1014 | > 1×1014 | > 1×1014 | > 1×1014 |
| 300ºC | 1×1012 | 1×1012 | 8×1011 | 1012-1013 | 1012-1013 | ||
| 500ºC | 2×1012 | 5×1010 | 2×109 | 1×109 | 1×109 | ||
| Dielectric strength | KV/mm | 20 | 19 | 18 | 18 | 18 | |
| Dielectric constant (1Mhz) | (E) | 9.8 | 9.7 | 9.5 | 9.5 | 9.5 |
Jinghui is an enterprise specializing in the research and production of precision ceramics. Metallized ceramics are our superior products. They have excellent high-frequency and high-voltage insulation properties, high sealing strength, and good vacuum airtightness. We hope that we will do our best to improve your product performance and reduce production costs with years of practical experience.
Jinghui has accumulated more than ten years of experience in the field of metallized ceramic structural parts, and can produce various specifications of metallized ceramic structural parts according to customers' drawings, with superior performance. Our customers are very recognized for our product quality.
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