A novel type of infrared radiant powders with spinel structure was prepared via the solid- state reaction of MnO₂ ,Fe₂O₃ ,CuO and Co₂O₃ powders at high temperature,and was mixed with mullite to obtain composite infra-red radiant powders via high- temperature calcination.Then,the product was mixed with silicate adhesive to fabri-cate infrared radiant coatings with high thermal shock resistance.Finally,the microstructure,physicochemicalproperties and thermal shock resistance of the coatings were investigated.The results show that (1) both the origi-nal and the composite infrared radiant powders exhibit excellent infrared radiation capability,for instance,they areof a room- temperature whole- band infrared emissivity of 0.90 and 0.91,respectively,as well as an infrared emis-sivity in narrow bands of more than 0.92; (2) the heat absorption and exchange capacity of high alumina brickwith composite infrared radiant coatings on its surface dramatically improves,for instance,the heat storage capacityimproves by 4.99% at 600℃ and by 20.98% at 1200℃; and (3) the thermal expansion coefficient of the com-posite infrared radiant coatings matches well with that of high alumina brick,which means that the composite coatingspossess excellent thermal shock resistance.