| Customization: | Available |
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| Application: | Aerospace Industry, Automotive Industry, Electrical Industry, Electronic Industry, Power Generation Industry, Insulators, Electrical Base, Shell, Switch Baseplate, Ceramic Housing for Thyristor |
| Electrical Insulation: | High Voltage Insulator |
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What is Insulators?
The devices used to support and insulate wires are called insulators. Insulators are mainly used to fix wires to poles and insulate wires from wires.
Jinghui has been focusing on the production and processing of precision ceramic structural parts for more than ten years. Our product production is mainly divided into 3 steps, forming - finishing - metallization. The production flow chart is shown below.
Why do Metallization on the Surface of Ceramic Structural Parts?
The metallization of ceramic surfaces is a process with high technical content. The specific influencing factors include metallization formula, metallization temperature and holding time, metallization microstructure, metallization coating thickness and coating method, etc.
The function of the metallization layer on the ceramic surface is to enhance or improve the surface properties of the product, such as oxidation resistance, wear resistance, corrosion resistance, and certain electrical, optical and tribological properties.
Introduction to Mo-Mn Method
There are many methods of metallizing the surface of ceramic structural parts, among which the process of Mo-Mn method is:
Metallized ceramic structural parts obtained by the Mo-Mn method have the following characteristics:
High bonding strength, high air tightness, high reliability and good heat resistance.
Alumina ceramics is a ceramic material with α-Al2O3 as the main crystal phase. It has the advantages of high mechanical strength, good thermal conductivity, high electrical strength and insulation resistance, low dielectric loss, and stable electrical properties with temperature and frequency. Therefore, It is widely used as electrical insulating material.
The material properties of alumina ceramics are shown in the table below.
| 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 specializes in the production of alumina ceramic precision parts, zirconia ceramic precision parts, silicon nitride ceramic precision parts and silicon carbide ceramic precision parts.
Our products are widely used in precision machinery manufacturing, microelectronics, semiconductors, aerospace, biomedicine, optical fiber communications, testing and inspection, and solar photovoltaics.
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