Preparation method of Al2O3/TiO3 ceramic stick for flame spraying

Abstract

The invention discloses a preparation method of an Al2O3 / TiO3 ceramic stick for flame spraying. The preparation method comprises the following steps of: weighing ceramic raw materials, and batching; processing via ball milling; then blending in a dry way, so as to obtain mixed powder; adding modification styrene-acrylic emulsion and the like in the powder; mixing the materials; preparing and pugging; transferring the plastic clay block into a vacuum extruder to be extruded and formed; heating to degum through a horizontal burning way; and finally roasting at a certain temperature, thus obtaining the Al2O3 / TiO3 ceramic stick. The preparation method disclosed by the invention is simple in technology, high in product percent of pass, and greatly reduces producing coat. The prepared ceramic stick has a better coating performance; and the coated ceramic coating has a better mechanical property, and synchronously has a better heat insulation property, an insulating property, a corrosion resistance property, an antistatic property and high smoothness of a spray coating layer, and no static generated in friction at high speed, and the like, and has a good application prospect in cotton spinning and chemical fiber industries.

Description

technical field [0001] The invention relates to the field of ceramic preparation, in particular to an Al 2 o 3 / TiO 2 Ceramic rod and its preparation method. 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 by the flame ...

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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 medium are added during the ball milling, so that the ball milling is more uniform, 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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