In the field of dental restoration, the quality of dental ceramic powders (such as lithium-based glass ceramics and zirconia) directly determines the strength, translucency, and biocompatibility of the final prosthesis. Recently, Epic Powder provided a professional laboratory-scale solution for a US-based client, successfully addressing the challenges of precision and purity in the ultrafine grinding of dental-grade glass ceramics.
Project Background
The client is dedicated to the R&D of high-performance dental restorative materials. Their core raw material is high-hardness, brittle glass ceramics. Clinical dental applications impose extremely stringent requirements on the powder:
- Particle Size Control: To ensure the density of the material after sintering, the powder’s D50 must be stably maintained at 8μm.
- Absolute Purity: As the material is intended for long-term implantation, the process must achieve Zero Metal Contamination. Any trace of metal ions could lead to prosthesis discoloration or bio-safety failure.
Technical Solution
To meet the client’s R&D needs, Epic Powder recommended the MQW03 Lab Jet Mill with a customized configuration:
- Equipment: MQW03 Lab-scale Jet Mill.
- Grinding Principle: Utilizes supersonic airflow to cause high-frequency collisions between particles for self-grinding.
- Full Ceramic Protection: To achieve “Zero Metal Contamination,” the grinding chamber lining, nozzles, and classifier wheel are made of Alumina or Zirconia ceramics. All contact surfaces are metal-free.
- Precision Classification: The integrated high-precision turbine classifier allows for precise targeting of the 8μm D50 range with a narrow distribution.
Experimental Results
| Indicator | Client Requirement | Experimental Result |
| Particle Size (D50) | 8μm | 7.8 – 8.2μm |
| Metal Impurity | 0 (None) | Not Detected (Zero) |
| Feed Size | < 1mm | Requirement Met |
| Yield/Loss | Lab scale | Stable with minimal loss |
Key Advantages
- Purity Assurance: The full ceramic lining eliminates metal impurities from mechanical wear—essential for dental and biomedical materials.
- Narrow Distribution: The jet milling mechanism prevents over-grinding, producing powder with excellent flowability for better molding.
- Easy Maintenance: The compact MQW03 design allows for quick cleaning, preventing cross-contamination between R&D batches.
Conclusion
This successful collaboration further demonstrates Epic Powder’s capability in providing customized solutions for high-end industries like dental and semiconductor materials.
