Characteristics and manufacturing requirements of alumina ceramic parts
July 11, 2023
Characteristics and manufacturing requirements of alumina ceramic parts
Mei Cheng ceramic manufacturers are professional production of alumina ceramic parts, zirconia ceramic parts production, processing, custom manufacturers, the next by Mei Cheng ceramic to focus on the characteristics of alumina ceramic parts and manufacturing requirements.
Before using alumina ceramic parts, in order to reduce the formation of bonding on the surface of the ceramic rod, a special coating should be applied evenly on the surface of the alumina ceramic parts. Before inserting the ceramic rods into the kiln, place the ceramic rods on top of the kiln (approx. 120°C). Preheat and dry the ceramic rods for at least 12 hours. Please note that the installation of the ceramic rods inserted into the kiln should be done as soon as possible to avoid excessive heating time without rotating the ceramic rods. Keep the ceramic rod rotating under load to avoid power failure. When removing the high-temperature ceramic rod from the kiln, use insulating wool or your hands to move it from one side of the kiln to the other. Hold the ceramic rod and keep it vertical during handling, avoiding tilting or leveling it to prevent heating and avoid contact between the hot ceramic rod and cold metal tools.
The characteristics of alumina ceramic parts are: high strength, high hardness, good wear resistance; high temperature resistance, long-term use at 1600°C; high corrosion resistance; good electrical insulation properties, especially at high temperatures, and can withstand more than 800 volts per millimeter of thickness. The disadvantages of alumina ceramic parts are: low toughness, poor thermal shock resistance, and can not withstand rapid changes in temperature.
Alumina ceramic parts are usually used directly without processing, especially for ceramic electronic devices with high precision requirements. Alumina ceramics are very different from ordinary ceramics in terms of composition and manufacturing process. While ordinary ceramics mainly use three processes: raw material preparation, billet forming and kiln firing, alumina ceramics mainly use powder sintering. During the forming process, it is difficult to cut the ceramic material due to its high hardness. Especially for complex non-aligned products such as turbocharger rotors, bones and teeth in automobile engines, the sintered product is a finished product without further processing. To meet this requirement, plastic parts have been produced to process alumina ceramics, imitating the injection molding process of the polymer materials industry, with satisfactory results.
Alumina ceramic parts in the manufacturing process should meet the following three requirements.
1. The selected raw materials should be high purity, the particles should be as fine as possible.
2. Strict control of chemical composition. In order to achieve quality stability and reproducibility, it is necessary to prevent the mixing and volatilization of impurities, and strictly control the particle size, interface and porosity of the sintered parts.
3. Shape and size.
The above is the content brought to you by Mecheng ceramics. Mei Cheng ceramics is a collection of R & D, production, sales in one of the electronic ceramics enterprises, start listed companies, is located in Hunan Province, Xinhua County, electronic ceramics industrial park, covers an area of 8W flat. Mainly engaged in: zirconia ceramics, alumina ceramics, talc ceramics and other non-oxide ceramics research and development and application.