Technical specifications of Macor mechanical engineering
Macor is a problem solving material.It gives the performance of a technical ceramic with the versatility of a high performance plastic.
Macor is an outstanding engineering material which is best machinable with diamond tool equipment.
- It has a high use temperature, 800 oC continuous and 1000 oC peak.
- It has a low thermal conductivity and is a useful high temperature insulator.
- It is an excellent electrical insulator.Macor is used in the electronic and semiconductor industries.
- It has no porosity and when properly baked out will not outgas.Macor is widely used in ultra high vacuum applications.
- It is strong and rigid.Macor unlike high temperature plastics will not creep or deform.
- It is radiation resistant.Macor is used in the nuclear industry.
- It can be thick, or thin film metallised, brazed, epoxy and frit bounded.
- It is white and can be highly polished.Macor is used in medical and optical devices.
Macor has the advantage of fast components availability made to your specifications.
High precision and complicated designs are possible.Design changes are easily made thereby reducing the for product and process development.
Macor components are economical, even in small quantities.
When you need the performance of a technical ceramic and your application demands the ready fabrication of a completed shape, look at Macor glass ceramic.
It will lower costs and substantially reduce the time between your design and actual use.
Macor’s unique properties find many varied applications
Electronic/Semiconductor Industry
Precision coil formers(high precision and dimensionally stable).High voltage insulators.(smooth surface finish and unaffected by arcing).
Laser Industry
Spacers, cavities and reflectors in laser assemblies(precision finish and heat resistant).
High vacuum Industry
Thermal breaks in high temperature processing equipment.Coil supports and vacuum feedthroughs(vacuum stable and hermetically sealable).
Aerospace/Space Industry
Retaining rings on hinges, windows and doors of NASA’s Space Shuttle.Supports and components in several satellite borne systems(thermally and electrically insulating).
Nuclear Industry
Fixtures and reference blocks in power generation units(dimensionally unaffected by irradiation).
Macor chemical composition
Macor is a white odourless, porcelain-like(in appearance) material composed of approximately 55% fluorophlogopite mica and 45% borosilicate glass.
Specifications of Macor
Density
- 2,52 g/cm3
Coefficient of Thermal Expansion
- 74 x 10-7 / °C (-200 - 25°C)
- 93 x 10-7 / °C (25 - 300°C)
- 114 x 10-7 / °C (25 - 600°C)
- 126 x 10-7 / °C (25 - 800°C)
Thermal Properties
- Continuous operating temp. : 800°C
- Max. operating temperature : 1.000°C (no load)
- Thermal Diffusivity (25°C) : 7,3 x 10-7 m2 / s
- Thermal Conductivity (25°C) : 1,46 W/m°C
- Specific Heat (25°C) : 0,79 KJ / kg°C
Mechanical Properties
- Porosity : 0%
- Young's Modulus (25°C) : 66,9 GPa
- Poisson's Ratio : 0,29
- Shear Modulus (25°C) : 25,5 GPa
- Knoop Hardness (100g) : 250
- Modulus of Rupture (25°C) : 94 MPa
- Compressive Strength : 345 MPa
- Fracture Toughness : 1,53 MPa m0,5
Electrical Properties
- Dielectric Constant (25°C) : 6,03 (1 KHz)
- Dielectric Loss Tangent (25°C) : 4,7 x 10-3 (1 KHz)
- Dielectric Strength (25°C) : 40 KV / mm (at 0,254mm thickness)
- Volume Resistivity : >1016 Ω-cm
Chemical Properties
| Medium | pH | Time (h) |
Temp. (°C) |
Weight loss (mg/cm2) |
|||
| 5% HCL | 0,1 | 24h | 95°C | ca. 100 | |||
| 0,002 N HNO3 | 2,8 | 24h | 95°C | ca. 0,6 | |||
| 0,1 N NaHCO3 | 8,4 | 24h | 95°C | ca. 0,3 | |||
| 0,02 N Na2CO3 | 10,9 | 6h | 95°C | ca. 0,1 | |||
| 5% NaOH | 13,2 | 6h | 95°C | ca. 10 | |||
| H2O (water) | 7,6 | 24h | 95°C | ca. 0,01 | |||
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