Understanding the effect of different sintering processes on the flexural strength of translucent monolithic zirconia is crucial for achieving optimal results.
What is the effect of different sintering process on flexural strength of translucency monolithic zirconia? (4 Key Factors)
1. Sintering Temperature
Sintering monolithic zirconia at high temperatures, typically around 1,100°C to 1,200°C, results in higher flexural strength compared to sintering at lower temperatures.
This is because the transformation of zirconia from a monoclinic structure to a polytetragonal crystalline state occurs at these higher temperatures.
This transformation increases particle density, strength, and translucency.
2. Sintering Time
Sintering monolithic zirconia for a longer duration also contributes to higher flexural strength.
The longer sintering time allows for a more complete transformation of zirconia and reduction of porosity.
This results in increased particle density and improved mechanical properties.
3. Sintering Profile
Following the recommended sintering temperature profile provided by zirconia manufacturers is crucial for achieving the desired flexural strength.
Deviating from the recommended profile may lead to deviations from the published specifications for density, strength, and translucency.
4. Final Sintering Temperature
The final sintering temperature has a significant impact on the density of the zirconia.
Higher final sintering temperatures, usually closer to 1,500°C, result in denser zirconia, approaching 99% of the theoretical maximum density.
This increased density contributes to higher flexural strength.
In summary, sintering monolithic zirconia at higher temperatures, for longer durations, and following the recommended sintering profiles and temperature profiles provided by manufacturers can result in higher flexural strength.
These factors contribute to the transformation of zirconia to a more dense and strong state, enhancing its mechanical properties.
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