Microwave Heating

Synotherm microwave dental furnaces

Microwave heating is emerging                      as the innovative, time saving  and energy efficient technology  for today’s demanding dental  sintering processes.

 

Microwave heating is emerging as the innovative, time saving and energy efficient technology for today’s demanding dental sintering processes.

For example, alumina the most common ceramic which until recently, required conventional heating to 1600C and 2 hours of hold time to achieve 98% of theoretical density, can now be sintered much faster, at lower temperature (1400C) and with no hold time, using microwave energy to achieve the same degree of densification , but with substantially less grain growth.

The microwave process provides similarly spectacular results when firing zirconia with rapid heating times of 40-45 minutes to 1500C compared to typical conventional radiant furnace process heating times of around 7-9 hours.

Microwave heating is emerging                      as the innovative, time saving  and energy efficient technology  for today’s demanding dental  sintering processes.
Why is microwave heating      so efficient and so fast? Why is microwave heating so efficient and so fast?

In the case of the microwave process, absorption followsvolumetric with the conversion  of electromagnetic energy intothermal energy.

The heat is generated internally within the material instead of from external sources.This is an inverse heating profile – inside out, unlike conventional heating which is outside in.

In this way, the heating is instantaneous, rapid, very efficient and with energy savings approaching 90%.

How microwave heating provides stronger materials with finer grain.

Above all, the most outstanding features observed from microwave sintered materials are their finer grain structures and increased strength.

Conventional slower heating systems expose the material which is being processed to longer periods within the critical temperature range where most grain growth occurs.

By comparison, microwave heating times are generally 10 times faster – producing sintered materials which approach 99.8% theoretical density. 

How microwave heating provides  stronger materials with finer grain.

To read more about Synotherm Microwaves visit our products page Click Here.

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