Sintering of Zirconia with Various Stabilizers

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Abstract
Usefulness of pure zirconia as a refractory material becomes limited due to phase transformation which results in volume changes. These phase transfromations can be suppressed by various stabilizers. It is observed that additions up to 5 wt % of various decomposable and non-decomposable stabilizers like CaCO3 MgCO3, Y2O3 and CaF2 result in formation of cubic zirconia phase from 15 to 90% between 1000° and 1200°C. However, the formation of cubic phase more than 35%, seems to be affecting the sinterability. Properties like densification, microstructure, cubic phase formed have been studied with these stabilizers. Data obtained reveals that nature of stabilizers and amount of cubic phase formed are factors influencing the densification and microstructure of resultant partially stabilized zirconia.

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