Optimization of high-pressure sintering of transparent zirconia with nano-sized grains

We show an optimum condition for high-pressure (400 MPa) spark-plasma-sintering (SPS) of transparent cubic (8 mol% yttria) zirconia. The obtained samples represent higher in-line transmittance compared to the existing SPSed zirconias, and maintain nano-grained structures. The role of oxygen defects in transparency of the zirconia is discussed.

Research highlights▶ High pressure spark plasma sintering (SPS) is applied to prepare transparent yttria-stabilized zirconia (YSZ). ▶ The resultant YSZ exhibit good in-line transmittance and maintain nano-grained microstructure.