The Electrical and Photocatalysing Properties of a Functionally Graded Material Based on Titanium Oxide

The authors have developed titanium oxide-based functionally graded materials (FGMs) offering special properties of high relative permittivity and photocatalysing capability. In the experiment reported, four such FGMs, sintered at furnace temperatures of 673, 873, 1073 and 1273 °K, were examined for their electrical behaviour, particularly relative permittivity and dielectric loss tangent. The measurement frequencies used were 0.25 ∼ 50 MHz. The paper concludes with a discussion of whether these materials can be used as photocatalyses for the sake of improving the environment. This would open up new applications for FGMs in the area of field relaxation and photocatalysis.