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Technical Ceramics

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Macor Grade Machinable Glass Ceramic Rod Sheet Bar Plate

Macor Grade Machinable Glass Ceramic from UNIPRETEC is an outstanding engineering material and is machinable with ordinary metalworking tools. It is also a problem solving material combining the performance of a technical ceramic with the versatility of a high performance plastic.
  • Material

    : Machinable Glass Ceramic
  • Color

    : White
  • Density

    : 2.4 g/cm3
  • Thermal Conductivity

    : 1.4 W/m.K
  • Max. Service Temperature

    : 1,000 degree C
  • Typical Advantages

    : Insulator, Vacuum Components
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Product Detail

▼ Introduction of Macor Grade Machinable Glass Ceramic

Macor Grade Machinable Glass Ceramic from UNIPRETEC is a white, odorless, porcelain-like (in appearance) material composed of approximately 55% fluorophlogopite mica and 45% borosilicate glass. Machinable glass ceramic is a new class of ceramic material which is capable of being machined to precise tolerances using conventional metal-working tools and equipment. There are a number of useful machining techniques which are pertinent to this material.


▼ Features of Macor Grade Machinable Glass Ceramic

 √ high use temperature (800°C continuous; 1,000°C peak);
 √ low thermal conductivity and it is a useful high temp. insulator;
 √ it can be thick or thin film metallized, brazed, epoxy and frit bonded;
 √ it is strong and rigid. It unlike high temperature plastics will not creep or deform;
 √ it is radiation resistant and plays a key role in nuclear applications and nuclear-related R&D;
 √ it is white and can be highly polished. It is the perfect material for medical and optical devices;
 √ excellent electrical insulator and it is used throughout the semiconductor and electronic industries;
 √ no porosity and when properly baked, it will not outgas. It is widely used in ultra high vacuum applications;



▼ Material Properties of Machinable Glass Ceramic

ITEM
UNIT
Value
Main Content
- SiO2 + MgO + Al2O3 + K2O + B2O3 + F     
Color
- White
Density
g/cm3
2.35 - 2.40
Apparent Porosity
%
0.069
Mohs Hardness
- 4 - 5
Compressive Strength (25 °C)
Mpa
510
Flexural Strength (25 °C)
Mpa
90
Thermal Conductivity (25 °C)
W/m.K
1.43
Max. Using Temperature
°C
1,000
Continuous Using Temperature
°C
800
Thermal Expansion Coefficient (25 - 1,000 °C)
10-6/K
7.4
Electrical Resistivity (20 °C)
Ω·cm
9.0 x 1013
Electrical Resistivity (200 °C)
Ω·cm
5.9 x 1010
Electrical Resistivity (500 °C)
Ω·cm
2.3 x 108
Dielectric Constant (1 MHz)
- 5.7
Dielectric Strength (25 - 1,000 °C)
KV/㎜
43
Tangent of Dielectric Lose Angle
- 4.0 x 10-3
Chemical Stability (1:9 HCI, 1 hour)
mg/cm2
5.84
Chemical Stability (10% NaOH, 1 hour)
mg/cm2
12.40
∆ The data is offered for reference, exact data will vary depending on manufacturing method & part configuration.

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