METHOD FOR PRODUCING MULTI-PHASE POROUS MAGNESIUM OXIDE-ZIRCONIUM OXIDE HEAT-RESISTANT BLOCKS WITH HIGH THERMAL SHOCK RESISTANCE Russian patent published in 2023 - IPC C04B35/53 B33Y10/00 B33Y70/10 C04B38/00 

FIELD: manufacturing heat-resistant materials.

SUBSTANCE: invention implements a method for producing a multi-phase porous heat-resistant block from magnesium oxide-zirconium oxide, with high resistance to thermal shock. The suspension required for 3D printing is prepared from fused magnesia powder or sintered magnesia powder as a raw material and dextrin or methylene cellulose as a binder. A magnesia matrix blank is obtained using 3D printing, dried for 6-10 hours, then calcined in a high-temperature furnace at a temperature of 1400-1500°C for 2-4 hours. The calcined blank is immersed in a zirconium dioxide sol in a vacuum device and dried. After drying and re-firing at a temperature of 1500-1700°C, a magnesia-zirconium composition of a porous heat-resistant block is obtained.

EFFECT: claimed method successfully produces composite magnesia-zirconium porous high-strength heat-resistant blocks with various shapes and sizes of pores, which not only fulfil the design of the product porosity, but also satisfy various requirements for use. The thermal shock resistance of the block is greatly improved by the combination of magnesium oxide-zirconia heat-resistant composition.

4 cl, 3 ex, 3 dwg