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Machinable microcrystalline glass ceramics can be processed and have excellent machining performance. Ordinary machine tools and cutting tools can be used for mechanical processing such as turning, milling, grinding, drilling, punching, and tapping.
Brief
Machinable microcrystalline glass ceramics can be processed and have excellent machining performance. Ordinary machine tools and cutting tools can be used for mechanical processing such as turning, milling, grinding, drilling, punching, and tapping.



Details
Machinable microcrystalline glass ceramics are fluorite mica microcrystalline glass with synthetic mica as the main crystal phase, mainly composed of fluorite mica (Mg3K [AlFe2O (SiO3) 3]) and glass with silicon dioxide as the main component. Containing 55% fluorogold mica and 45% borosilicate glass matrix.
Parameter
| Machinable Glass Ceramic | ||
| Property Content | Property Index | Instruction |
| Density | 2.6g/cm³ | |
| Apparent Porosity | 0.069% | |
| Water Absorption | 0 | |
| Hardness | 4~5 | Mohs |
| Color | White | |
| Coefficient of Thermal Expansion | 72×10⁻⁷ /℃ | -50℃ to 200℃ average |
| Thermal Conductivity | 1.71W/m·k | 25℃ |
| Long Working Temperature | 800℃ | |
| Flexural Strength | >108MPa | |
| Compression Strength | >508MPa | |
| Impact Toughness | >2.56KJ/m² | |
| Modulus of Elasticity | 65GPa | |
| Dielectric Loss | 1~4×10⁻³ | Room Temperature |
| Dielectric Constant | 6~7 | " |
| Puncture Strength | >40KV/mm | Sample Thickness 1mm |
| Volume Resistance | 1.08×10¹⁶Ω·cm | 25℃ |
| 1.5×10¹²Ω·cm | 200℃ | |
| 1.1×10⁹Ω·cm | 500℃ | |
| Normal Temperature Gas Efficiency | 8.8×10⁻⁹ml/s·cm² | Vacuum Burn-in 8 hours |
| Helium Through Rate | 1×10⁻¹⁰ml/s | 500℃ firing, cooling |
| 5%HC1 | 0.26mg/cm² | 95℃,24hours |
| 5%HF | 83mg/cm² | " |
| 50%Na₂CO₃ | 0.012mg/cm² | " |
| 5%NaOH | 0.85mg/cm² | " |


