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Microwave zirconia sintering furnace — MESTRA
Brand: MESTRA • Type: Microwave sintering furnace for zirconia
SKU: 080114 • Temp. max 1550 °C Fast cycle
Max temp. 1550 °C
Up to 1550 °C ≈ 110 min
Cooling ≈ 130 min → 300 °C
Consumption ≈ 800–1100 W*
* Low consumption throughout almost the entire cycle; energy savings vs. conventional resistive ovens.
Microwave sintering: speed, thermal homogeneity and savings
Designed for dental zirconia , this microwave oven delivers rapid and even temperature rise, short cycles and reduced consumption.
- Ideal for speeding up production while improving dimensional stability and cleanliness of structures after sintering.
Why microwave technology is a game changer
- In a resistive oven, the heat diffuses from the outside to the inside; in a microwave , it is generated at the heart of the structure, promoting homogeneity.
- Rapid sintering up to 1550 °C in ≈110 min, cooling ≈130 min up to 300 °C.
- Significant energy saving : low average power (≈800–1100 W).
- Less deformation and better dimensional accuracy on bridges.
- Short cycles → increased productivity, possibility of launching emergencies during the day.
- 4-hour cycle all inclusive, possibility of carrying out 3 cycles in the day. (Ex: 8 a.m. to 12 p.m., 1 p.m. to 5 p.m. and 6 p.m. to 10 p.m., the oven stops by itself)
Key differences from conventional ovens
- Fewer restrictive steps, more direct and homogeneous climb.
- Overall cycle time ≈ 4 H (cooling included), difficult to achieve in resistive.
- Much lower consumption and heat output in the lab.
- No molybdenum silicate resistors (fragile, expensive, risk of contamination).
- Simplified maintenance, faster and more economical after-sales service .
Videos & Resources
Watch the conference (YouTube)
Complementary products
Instructions for use (laboratory)
- Start on a cold oven, launch the program dedicated to zirconia.
- Respect the controlled temperature increase up to 1550°C.
- Stabilize the bearing according to the load and geometry of the parts.
- Cool gradually to 300°C (≈130 min).
- Usable chamber: 8.5 cm (D) × 9.5 cm (W) × 3.5 cm (H).
- The oven is supplied with the necessary accessories for quick commissioning.
Technical characteristics
| Dimensions | 385 (W) × 440 (D) × 547 (H) mm |
|---|---|
| Weight | 31 kg |
| Tension | 230 V AC, 50 Hz |
| Fuse | 15 A |
| Power | 2000 W |
| Maximum temperature | 1550 °C |
| Useful room | 8.5cm (D) × 9.5cm (L) × 3.5cm (H) |
Financing & documentation
Financing including tax: indicate “FINANCING” in the basket at the payment stage.
(Electronic signature: provide your SIRET number, a bank account number and a valid ID document.)
FAQ
What are the advantages compared to a conventional sintering furnace?
Microwave technology is distinguished by volumetric heating, meaning that the energy is deposited inside the structure instead of slowly diffusing from the outside.
- Concretely, this improves thermal homogeneity and reduces the total cycle time, with a rise to 1550°C in around 110 minutes and a cooling to around 300°C in around 130 minutes.
- Power consumption remains significantly lower , as the average power is around 800–1100 W for most of the cycle.
- In production, we observe less deformation, better dimensional accuracy, increased surface cleanliness and the possibility of launching urgent cycles without disrupting the workshop.
- for a perfect result without any deformation.
How does a typical cycle work and what parameters should be monitored?
A typical cycle starts in a cold furnace with a program dedicated to zirconia.
- The temperature increase must remain controlled to respect the sintering kinetics while taking advantage of the speed offered by microwaves.
- Once the final plateau is reached, maintain the plateau according to the geometry, mass and loading of the chamber.
- Cooling must remain gradual to limit internal gradients and residual stresses, up to approximately 300°C.
- Monitor the load (useful height 3.5 cm), the arrangement of the parts (spacing), the condition of the accessories (cup, sintering balls), and record your parameters to ensure reproducibility between batches.
What are the best practices for daily operation and maintenance?
To maintain performance over time, keep the chamber and accessories clean and regularly inspect the sintering cup and balls to prevent deposits.
- Respect the useful volume and avoid overloading the room so as not to disturb thermal homogeneity.
- Update your internal procedures: cycle sheets, entry/exit control, traceability of materials and colors.
- In case of reduced efficiency, check the condition of the suceptors and consult the tutorials (replacement of the magnetron, adjustments) for quick and economical after-sales service.
- This preventive approach secures clinical quality, limits downtime and guarantees consistent results from batch to batch.