Machinable GlassMacor®
Macor ® – Machinable Glass Ceramic
Macor machinable glass ceramic has the versatility of a high performance polymer, the machinability of a metal, and the performance of an advanced technical ceramic. It is a hybrid glass-ceramic and offers a unique combination of properties from both families of materials. Macor is an excellent electrical and thermal insulator, and offers good performance in high temperature, vacuum, and corrosive environments.
One of the main advantages of Macor is that it can be machined with conventional metalworking tools. This allows for significantly faster turnarounds and substantially lower production costs when compared with other technical ceramics, making it an excellent material for both prototyping and medium-volume production runs.
One of the main advantages of Macor is that it can be machined with conventional metalworking tools. This allows for significantly faster turnarounds and substantially lower production costs when compared with other technical ceramics, making it an excellent material for both prototyping and medium-volume production runs.
Advantages
- It can be processed with common metalworking tools
- Firm and hard; Unlike high-temperature plastics, Macor does not creep or deform
- Low thermal conductivity; Useful high-temperature insulators
- Electrical insulators, especially at high temperatures
- It features excellent high voltage and wide spectrum
- No firing is required after processing
- Continuous operating temperature: 800℃; Peak temperature: 1000℃
- Zero porosity
- It will not exhaust gas in a vacuum environment
- The processing tolerance is extremely small, up to 0.0005 inches (0.013 millimeters).
- It has excellent dimensional stability in various environments (such as heat and radiation)
- Anti-radiation
- The coefficient of thermal expansion matches that of most metals and sealing glasses
Macor Material Properties
Mechanical Properties
Thermal Properties
Electrical Properties
Macor machinable glass ceramic is strong and rigid. It has zero porosity and can be polished to a smoothness of 0.5µin.
| Property | Units | Macor |
|---|---|---|
| Density | g/cm3 | 2.52 |
| Young’s Modulus | GPa | 66.9 |
| Poisson’s Ratio | – | 0.29 |
| Compressive Strength | MPa | 345 |
| Flexural Strength @ 25°C | MPa | 94 |
| Fracture Toughness KIc | MPa m1/2 | 1.53 |
| Shear Modulus | GPa | 25.5 |
| Hardness | GPa | 2.3 |
Macor will not creep or deform like high temperature plastics. It has low thermal conductivity, which makes it useful as a high temperature insulator. Macor has excellent dimensional stability in a variety of environments (heat, radiation, etc.). It’s coefficient of thermal expansion readily matches most metals and sealing glasses.
| Property | Units | Macor |
|---|---|---|
| Maximum Temperature (Oxidizing) | °C | 800 |
| Maximum Temperature (Inert) | °C | 1000 |
| Thermal Conductivity @ 25°C | W/mK | 1.46 |
| Specific Heat | kJ/kg°C | 0.79 |
| CTE1 25°C ➞ -100°C | 10-6/K | 8.1 |
| CTE1 25°C ➞ 300°C | 10-6/K | 9 |
| CTE1 25°C ➞ 600°C | 10-6/K | 11.2 |
| CTE1 25°C ➞ 800°C | 10-6/K | 12.3 |
Coefficient of Thermal Expansion (CTE) describes how the size of an object changes with a change in temperature.
Macor machinable glass ceramic is a good electric insulator, especially at high temperatures. It works excellent with high voltages and a broad spectrum of frequencies. It is also radiation resistant.
| Property | Units | Macor |
|---|---|---|
| Resistivity @ 25°C | ohm-cm | 1014 |
| Dielectric Constant @ 1KHz | – | 6.01 |
| Dielectric Constant @ 8.5 GHz | – | 5.64 |
| Loss Tangent | 1 kHz | 0.0040 |
| Loss Tangent | 8.5 GHz | 0.0025 |
| Dielectric Strength (AC) avg. 25°C, 12 mm thickness | kV/mm | 9.4 |
| Dielectric Strength (DC) avg. 25°C, 12 mm thickness | kV/mm | 62.4 |
| Volume Resistivity @25°C | ohm-cm | >1017 |
Disclaimer: The values presented are mean and typical of those resulted from test samples. They are provided as an indication only to serve as guidance in the design of ceramic components and are not guaranteed in any way. The actual values can vary according to the shape and size of the envisioned component.
Macor processing
Macor is one of the few ceramics that can be processed with conventional metalworking tools. Although processing Macor requires a certain amount of learning time, as long as one has the correct skills and patience, it is certain to be mastered. The processing characteristics of Macor are quite different from those of metals and plastics. Therefore, we suggMacor is one of the few ceramics that can be machined using regular metal working tools. While there is a learning curve to machining Macor, it is certainly achievable for someone with the correct skills and patience. The machining characteristics of Macor are very different from metals and plastics so we recommend you take some time to practice drilling, turning, and milling the Macor before you try to make your own component to understand how it behaves. Unlike plastics and metals, ceramics never plastically deform; this means that when machining Macor you must be very conscious of chipping.
Precision Ceramics is your Macor machinable glass ceramic specialist for your technical ceramic prototyping & manufacturing needs. We are always happy to use our many years of advanced ceramics experience to provide advice on materials, design, and application. If you would like to buy Macor plates, rods, bars, tubes, or custom machined components please contact us and one of our experts will be happy to assist you.
Precision Ceramics is your Macor machinable glass ceramic specialist for your technical ceramic prototyping & manufacturing needs. We are always happy to use our many years of advanced ceramics experience to provide advice on materials, design, and application. If you would like to buy Macor plates, rods, bars, tubes, or custom machined components please contact us and one of our experts will be happy to assist you.
Product application
Overview of macor Processable Glass Ceramics: Macor processable glass ceramics combine the versatility of high-performance polymers, the processability of metals, and the performance of advanced technical ceramics. It is a kind of hybrid glass ceramic that combines the unique properties of both materials. Macor is an excellent electrical insulator and thermal insulator, performing well in high-temperature, vacuum and corrosive environments.
Electrical performance
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Forming method
Overview of macor Processable Glass Ceramics: Macor processable glass ceramics combine the versatility of high-performance polymers, the processability of metals, and the performance of advanced technical ceramics. It is a kind of hybrid glass ceramic that combines the unique properties of both materials. Macor is an excellent electrical insulator and thermal insulator, performing well in high-temperature, vacuum and corrosive environments.
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