Mestra microwave zirconia sintering furnace for dental labs
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Mestra Microwave Zirconia Sintering Furnace for Dental Labs
Brand: Mestra • Type: Microwave zirconia sintering furnace for dental labs
SKU: 080114
Price: 9 885 €
Max temp. 1550 °C Fast sintering cycle
Max temp.1550 °C
Rise to 1550 °C≈ 110 min
Cooling≈ 130 min → 300 °C
Power cons.≈ 800–1100 W*
Lab tip Ideal for urgent zirconia cases Low heat emission in the lab
* Very low energy consumption during most of the sintering cycle, giving clear savings versus conventional resistive zirconia furnaces.
Microwave zirconia sintering for dental crowns & bridges
This microwave zirconia sintering furnace is engineered for dental labs that produce zirconia crowns, bridges and frameworks. It delivers a rapid, homogeneous temperature rise, short sintering cycles and significantly reduced power consumption.
- Increase daily throughput while maintaining excellent dimensional stability and a clean surface finish on zirconia restorations after sintering.
Why choose microwave technology for zirconia sintering?
- In a conventional resistive furnace, heat comes from the outside; with microwave sintering, heat is generated inside the zirconia structure for better thermal homogeneity.
- Fast sintering cycles up to 1550 °C in ≈ 110 min, then controlled cooling ≈ 130 min down to 300 °C.
- Lower energy costs thanks to a low average power draw (≈ 800–1100 W) throughout the cycle.
- Reduced risk of warping on long-span zirconia bridges and more accurate marginal fit.
- Short cycles allow you to manage same-day urgent zirconia cases for dentists.
- Approx. 4-hour full cycle; up to 3 sintering cycles per day (e.g. 8–12 h, 13–17 h, 18–22 h, with automatic stop at the end of the program).
Microwave vs conventional sintering furnace: key differences
- Fewer complex holding plateaus and a more direct, homogeneous temperature rise throughout the zirconia load.
- Overall cycle time of around 4 hours including cooling, which is difficult to reach with most conventional resistive sintering ovens.
- Much less heat released into the dental lab and significantly lower electricity consumption.
- No molybdenum disilicide heating elements (fragile, expensive and a potential source of contamination inside the chamber).
- Simplified maintenance and faster, more cost-effective after-sales service compared with traditional sintering furnaces.
Videos & technical resources for the Mestra microwave furnace
Watch the full conference on zirconia microwave sintering (YouTube)
Dental applications of the microwave zirconia furnace
- Sintering of monolayer and multilayer zirconia frameworks for crowns, bridges and full-arch restorations.
- Production of long-span zirconia bridges with improved dimensional stability and reduced distortion.
- Managing urgent zirconia cases during the same day thanks to short sintering cycles.
- Cleaner zirconia surfaces after sintering, ready for staining, glazing or layering ceramics.
Laboratory workflow & operating instructions
- Start from a cold furnace and launch the dedicated zirconia sintering program recommended by Mestra.
- Follow the controlled temperature rise up to 1550 °C, then maintain the plateau based on load, mass and geometry of the restorations.
- Allow a progressive cooling phase down to 300 °C (≈ 130 min) to reduce thermal stress in zirconia.
- Usable chamber size: 8.5 cm (D) × 9.5 cm (W) × 3.5 cm (H) – ideal for typical dental lab sintering bowls.
- The furnace is supplied with all essential accessories so you can put it into service quickly in your dental lab.
Complementary products for the Mestra zirconia furnace
Technical specifications of the Mestra microwave furnace
| Dimensions | 385 (W) × 440 (D) × 547 (H) mm |
|---|---|
| Weight | 31 kg |
| Voltage | 230 V AC, 50 Hz |
| Fuse | 15 A |
| Power | 2000 W |
| Maximum temperature | 1550 °C |
| Usable chamber | 8.5 cm (D) × 9.5 cm (W) × 3.5 cm (H) |
Delivery & documentation
Delivery: 1 Mestra Microwave Zirconia Sintering Furnace – 220 Volts.
FAQ – Microwave zirconia sintering furnace
What are the benefits of a microwave zirconia sintering furnace for a dental lab?
A microwave zirconia sintering furnace provides volumetric heating: energy is deposited inside the zirconia restorations instead of coming only from external heating elements as in a conventional furnace.
- Improved thermal homogeneity and a much shorter global cycle (≈ 4 hours including cooling) for zirconia crowns and bridges.
- Rise to 1550 °C in about 110 minutes and controlled cooling to 300 °C in about 130 minutes.
- Low average power consumption (≈ 800–1100 W) throughout the program delivers significant energy savings for the dental lab.
- Reduced deformation, better marginal accuracy and clean surfaces ready for finishing or layering ceramics.
How does a typical zirconia sintering cycle work in this microwave furnace?
Start the program with a cold furnace and load your zirconia frameworks according to the manufacturer’s recommendations.
- Control the temperature rise to respect zirconia sintering kinetics while still benefiting from the fast microwave heating profile.
- Maintain the holding plateau depending on geometry, mass and overall load of zirconia frameworks.
- Allow gradual cooling to around 300 °C to minimise internal stress and reduce the risk of cracks or distortion.
- Monitor the usable height (3.5 cm), keep enough space between restorations and check the condition of bowls, beads and susceptors.
What daily maintenance is recommended for reliable zirconia sintering results?
Regular preventive maintenance keeps the microwave sintering furnace stable and consistent from batch to batch.
- Keep the chamber, sintering bowl and zirconia beads clean; remove dust and deposits regularly.
- Avoid overloading the bowl; respect the usable chamber volume to maintain homogeneous microwave heating.
- Update your internal procedures (cycle sheets, traceability, incoming/outgoing quality checks) for every zirconia batch.
- If you notice a drop in performance, inspect susceptors and follow the official tutorials (magnetron replacement, checks and adjustments) for quick and efficient service.