Preparation method of zirconia ceramic rod for flame spraying

Abstract

The invention discloses a preparation method of a zirconia ceramic rod for flame spraying. The method comprises the steps of: first, weighing and proportioning a ceramic raw material; grinding and drying the raw material to obtain a mixed powder; then adding a modified styrene-acrylic emulsion into the mixed powder; conducting mixing and pugging; placing plastic clay into a vacuum extruder, and extruding for molding; using a horizontal burning method; heating for a degumming treatment; and finally sintering at a certain temperature to obtain the zirconia ceramic rod provided by the invention.The invention has the advantages of simple process, high rate of qualified products, greatly reduced production cost and improved efficiency, and is suitable for industrialized production; the produced ceramic rod has good spraying performance; and a ceramic coating formed after spraying has good mechanical properties, good thermal insulation, insulation and corrosion resistance, etc. The zirconia ceramic rod has good application prospects in the fields of tank, armored vehicle and aerospace.

Description

technical field [0001] The invention relates to the field of ceramic preparation, in particular to a zirconia ceramic rod for flame spraying and a preparation method thereof. Background technique [0002] With the development of science and technology, ceramic printing technology has gradually been widely used. At present, the relatively mature ceramic spraying technology mainly includes plasma spraying and flame spraying technology. Among them, the application of the plasma spraying method in the industry is limited due to reasons such as complex process equipment, high price, inconvenient maintenance, and troublesome operation. Flame spraying technology has simple equipment, strong versatility, and simple process methods, so it has been widely used. According to the different spraying raw materials used, flame spraying technology is divided into powder flame spraying and ceramic rod flame spraying. For powder flame spraying, since the ceramic powder particles are heated...

AI Technical Summary

Problems solved by technology

The obtained oxide ceramic rod has good spraying performance, and the ceramic coating formed after spraying has good mechanical properties, and also has good heat insulation, insulation, corrosion resistance, etc., but this patented process There are the following deficiencies: 1. Agate balls and alcohol media are added during the ball milling, so that the balls are more evenly milled, but at the same time, the original edges and corners of each raw material are ground away, and the cohesion between the materials is reduced. When sintered at high temperature, it is easy to deform, which reduces the pass rate and increases the processing cost;

[0004] 2. When degumming and high-temperature sintering, the hanging sintering method is adopted. This sintering method has strict requirements on the specific gravity of the main raw material. For the main raw material, zirconia ceramic rods with too large specific gravity or aluminum oxide with too light specific gravity / Titanium dioxide ceramic rod material, large specific gravity is easy to fall and break when hanging and firing, and light specific gravity is easy to deform when hanging and firing, resulting in extremely low qualified rate of finished products, very low production efficiency and high scrap rate, which cannot meet the needs of industrial production.

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