Comparative studies of structural and dielectric properties of mullite@zirconia composites synthesized by conventional sintering and thermal plasma sintering

AC Conduction Mechanism and Impedance Analysis of Conventional and Plasma‐Sintered Yttria‐Stabilized ZrO2@Mullite Composite

“…[1] Experimental works of Malki et al reported that a standard homogeneous mullite (3Al 2 O 3 .2SiO 2 ) ceramic has quite low electrical conductivity at 300 °C (≈0.5 × 10 −9 S cm −1 ), but high oxygen conducting capacity at high temperatures. [2][3][4] However, the poor thermal shock resistance of mullite at high temperatures limits its application in electronic devices or electromechanical oxygen sensors. In this regard, dispersed ZrO 2 grains in the mullite matrix act as DOI: 10.1002/crat.202300245 thermal stress concentrators enabling the use of ZrO 2 @Mullite composites at high temperatures.…”