Low temperature method for manufacturing high thermal shock superhigh temperature zircite product

Abstract

The invention discloses a method for manufacturing a high thermal shock ultra-temperature zirconium dioxide product at low temperature. The manufacturing method is to use electric-melting high-purity zirconium dioxide fine powder with granularity less than 47mum (using one of Y2O3, (CaO+Y2O3), (CaO+MgO) and (MgO+Y2O3) as a stabilizing agent) as a substrate, Y2O3 fine powder with granularity less than 5mum as an additive, one of ZrO2 collosol and ZrOCl solution or combination of one of lignosulphonate and phenolic resin with the ZrOCl solution as a bonding agent to fire the product after milling, forming and drying at a temperature ranging from 1,630 to 1,700 DEG C. Heavy and light high purity zirconium dioxide products which are manufactured by the method have high thermal shock stability, high compressive strength, good high temperature stability, strong impermeability and erosion resistance, good thermal insulation effect and the like, and can be used in a high temperature environment over 2,200 DEG C for long time; and the manufacturing method has the advantages of simple manufacturing process, easy industrial popularization and application and the like.

Description

technical field

[0001] The invention relates to a low-temperature manufacturing method for ultra-high-temperature smelting and ultra-high-temperature firing of special metals and high thermal shock zirconia products for ultra-fine metal powder manufacturing. Background technique

[0002] Most of the zirconia refractory materials currently used are produced by the traditional production process, that is, using electrofusion-stabilized zirconia sand and electrofusion-stabilized zirconia fine powder as raw materials to burn heavy zirconia refractories at high temperatures, or electrofusion-stabilized Zirconia hollow spheres and fused stabilized zirconia fine powder are used as raw materials. After being formed by vibration and pressure, they are fired at a high temperature of 1800°C to produce heat-insulating lightweight zirconia hollow sphere products. However, the zirconia hollow spheres and zirconia sand particles are mostly bonded at points, and it is difficult to form a hi...