The synthesis and applications of black ceramic formed by recycling of industrial wastes are presented. Black ceramic was synthesised using vanadium residue, kaolin and earthenware clay as starting materials. The stable phase structures in the black ceramic include ilmenite, haematite and iolite. The V-Ti black ceramic that was produced can be used as black pigment, black tiles, infrared radiating elements and for solar absorber coatings.

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Ceramic thermal barrier coatings (TBCs) are widely used on the gas turbine engine. As one of the candidate TBC materials, LaPO4 has attracted much attention. In the present study, the bulk LaPO4 was prepared by spark plasma sintering (SPS). The effect of different preparation conditions on the properties of the obtained LaPO4 ceramic was studied. The phase composition, microstructure, thermal expansion and thermal conductivity of the LaPO4 ceramic with heat treatment at 1450°C for different time were studied by XRD and SEM.