Ferro-Ceramic Grinding Inc. machines over 15 different materials
Quartz
Quartz machining is another common service that Ferro-Ceramic provides. Quartz comes from silica, which can be found practically anywhere in nature—from sand to crystals to rocks. Fused quartz (otherwise known as silica) comes from melting high-purity silica sand that produces transparent glass with ultra-high purity.
One of the significant benefits of quartz, which separates it from other materials, is its optical clarity. Quartz is a popular choice for applications where transparency is necesssary—like windows and mirror substrates. But quartz also has many other beneficial qualities besides its transparency, such as its permeability, hardness, and resistance to high temperatures.
Quartz Properties
The applications for quartz are endless, where optical clarity, chemical and thermal resistance and insulation, and hardness are required. Quartz is commonly used in the semiconductor world and the lighting industry, specifically in lenses and UV-transmitting optics.
Learn more about the many qualities of fused quartz and quartz machining by talking with our helpful staff at Ferro-Ceramic.
| Properties | Units | Test | Value |
|---|---|---|---|
| Physical | |||
| Chemical Formula | SiO2 | ||
| Density, r | g/cm3 | ASTM C20 | 2.21 |
| Color | - | - | white/ transparent |
| Crystal Structure | - | - | hexagonal |
| Water Absorption | % @R.T. | ASTM C373 | 0.0 |
| Hardness | Moh's | - | 7 |
| Hardness | knoop (kg/mm2) | Knoop 100g | > 600 |
| Mechanical | |||
| Compressive Strength | MPa @ R.T. | ASTM C773 | 650 - 1100 |
| Tensile Strength | MPa @ R.T. | ACMA Test #4 | 48 |
| Modulus of Elasticity (Young's Mod.) | GPa | ASTM C848 | 70 |
| Flexural Strength (MOR) | MPa @ R.T. | ASTM F417 | 80 |
| Poisson's Ratio, u | ASTM C818 | 0.17 | |
| Fracture Toughness, KIc | MPa x m1/2 | Notched Beam Test | - |
| Thermal | |||
| Max. Use Temperature (* denotes inert atm.) | ºC | No load cond. | 1200 |
| Thermal Shock Resistance | DT (ºC) | Quenching | > 1400 |
| Thermal Conductivity | W/m-K @ R.T. | ASTM C408 | 1.4 |
| Coefficient of Linear Thermal Expansion, al | mm/m-ºC (~25ºC through ±1000ºC) | ASTM C372 | 0.45 |
| Specific Heat, cp | cal/g-ºC @ R.T. | ASTM C351 | 0.16 |
| Electrical | |||
| Dielectric Constant | 1MHz @ R.T. | ASTM D150 | 3.8 |
| Dielectric Strength | kV/mm | ASTM D116 | 25 - 40 |
| Electrical Resistivity | Wcm @ R.T. | ASTM D1829 | 6 x 1010 |