Ferro-Ceramic Grinding Inc. machines over 15 different materials
Macor
MACOR is a unique, reliable material developed and sold by Corning Inc. This machinable glass-ceramic material is white and often looks like porcelain, but it’s quite different.
MACOR ceramic machining is also unique because it can be performed with regular metal working tools instead of advanced equipment. The odorless and nontoxic MACOR material primarily consists of fluorphlogopite mica and borosilicate glass. Other compounds found in MACOR include silicon, magnesium, and aluminum.
Macor Properties
MACOR is a high temperature machinable ceramic that offers many advantageous properties, including excellent insulating properties (electrical and thermal) and dimensional stability. It can be polished, machined to tight tolerances, tapped, sealed, and metalized.
MACOR can be used in many of the same applications as alumina, as it exhibits many of the same insulation and thermal properties. Typically, MACOR is substituted for alumina when the extremely high temperature and wear characteristics of alumina are not necessary. MACOR is regarded as one of the most cost-effective materials for ceramic applications.
Contact our helpful staff at Ferro-Ceramic to learn more about MACOR and MACOR ceramic machining.
| Properties | Units | Test | Value |
|---|---|---|---|
| Physical | |||
| Chemical Formula | - | - | glass ceramic |
| Density, r | g/cm3 | ASTM C20 | 2.52 |
| Color | - | - | white |
| Crystal Structure | - | - | random |
| Water Absorption | % @R.T. | ASTM C373 | 0.0 |
| Hardness | Moh's | - | 4.5 |
| Hardness | knoop (kg/mm2) | Knoop 100g | 250 |
| Mechanical | |||
| Compressive Strength | MPa @ R.T. | ASTM C773 | 345 |
| Tensile Strength | MPa @ R.T. | ACMA Test #4 | 90 |
| Modulus of Elasticity (Young's Mod.) | GPa | ASTM C848 | 66.9 |
| Flexural Strength (MOR) | MPa @ R.T. | ASTM F417 | 94 |
| Poisson's Ratio, u | - | ASTM C818 | 0.29 |
| Fracture Toughness, KIc | MPa x m1/2 | Notched Beam Test | 1.53 |
| Thermal | |||
| Max. Use Temperature (* denotes inert atm.) | ºC | No load cond. | 1000 |
| Thermal Shock Resistance | DT (ºC) | Quenching | 25 - 100 |
| Thermal Conductivity | W/m-K @ R.T. | ASTM C408 | 1.46 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | ASTM C372 | 6.3 - 9.7 |
| Specific Heat, cp | cal/g-ºC @ R.T. | ASTM C351 | 0.19 |
| Electrical | |||
| Dielectric Constant | 1MHz @ R.T. | ASTM D150 | 6.03 |
| Dielectric Strength | kV/mm | ASTM D116 | 40 |
| Electrical Resistivity | Wcm @ R.T. | ASTM D1829 | >1017 |