Ferro-Ceramic Grinding Inc. machines over 15 different materials
Lava Grade A
Lava, Grade A Lava is a machineable ceramic material, sometimes referred to as ‘alumino-silicate’, based on its chemical formula.
Lava Properties
Lava is a machineable ceramic material, sometimes referred to as ‘alumino-silicate’, based on its chemical formula. It has a high use temperature, and excellent thermal and electrical insulating properties.
| Properties | Units | Test | Value |
|---|---|---|---|
| Physical | |||
| Chemical Formula | - | - | [Al2(Si4O10)(OH)2] |
| Density, r | g/cm3 | ASTM C20 | 2.30 |
| Color | - | - | pink |
| Crystal Structure | - | - | random |
| Water Absorption | % @R.T. | ASTM C373 | 2.5 |
| Hardness | Moh's | - | 6 |
| Hardness | knoop (kg/mm2) | Knoop 100g | 500 |
| Mechanical | |||
| Compressive Strength | MPa @ R.T. | ASTM C773 | 172.5 |
| Tensile Strength | MPa @ R.T. | ACMA Test #4 | 20.7 |
| Modulus of Elasticity (Young's Mod.) | GPa | ASTM C848 | - |
| Flexural Strength (MOR) | MPa @ R.T. | ASTM F417 | 69 |
| Poisson's Ratio, u | - | ASTM C818 | - |
| Fracture Toughness, KIc | MPa x m1/2 | Notched Beam Test | - |
| Thermal | |||
| Max. Use Temperature (* denotes inert atm.) | ºC | No load cond. | 1150 |
| Thermal Shock Resistance | DT (ºC) | Quenching | - |
| Thermal Conductivity | W/m-K @ R.T. | ASTM C408 | 1.98 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | ASTM C372 | 3.6 |
| Specific Heat, cp | cal/g-ºC @ R.T. | ASTM C351 | 0.20 |
| Electrical | |||
| Dielectric Constant | 1MHz @ R.T. | ASTM D150 | 5.3 |
| Dielectric Strength | kV/mm | ASTM D116 | 0.1 |
| Electrical Resistivity | Wcm @ R.T. | ASTM D1829 | 1014 |
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.