Details of the factors that deform alumina ceramics in processing

Details of the factors that deform alumina ceramics in processing

Alumina ceramic tube deformation of many factors, such as billet formulation, forming, drying system, etc. can lead to deformation of the production. The following is the professional production of alumina ceramics manufacturers Mei Cheng ceramics to focus on the analysis of the factors of alumina ceramic deformation in processing.

Alumina ceramic firing on the impact of deformation.

1. On the warped edge

The billet along the kiln direction parallel to the two sides of the upward bend, and the direction perpendicular to the two sides of the deformation is not obvious. The reason for this is the firing zone in the early stage (850 & mdash; 900 ℃ or 50 & mdash; 100 ℃ lower than the high firing temperature zone) rollers up and down the temperature difference is not reasonable. Solution: in the region to raise the temperature above the roller channel 5 & mdash; 10 ℃ or more (depending on the debugging effect to determine), while reciprocally reducing the temperature below the roller channel, so that it is slightly concave, but definitely not convex, so that the use of alumina ceramic tube billet under the softening projection point to maintain balance, the billet due to gravity and restore straight.

2. Curved angle

This deformation is characterized by the four corners of the billet body are up, the length of about 30mm, the rest of the surface is flat or only a little concave, this defect occurs in the middle of the kiln and both sides. It is due to the late firing roller plane temperature difference between the upper and lower too large. Generally occur more in the firing process  after 2-5 minutes. Solutions.

① If the kiln size is correct, reduce the temperature of the upper part of the roll bar after firing belt 2—3 groups (box) (5—10 ℃ or higher, depending on the debugging effect to determine) and reciprocally raise the temperature below the roll path.

② If the size of the product after firing is large, only the temperature below the roller channel is raised 5—10 ℃ or more, (depending on the debugging effect to determine)

③ If the product size is small after firing, only raise the temperature above the roller conveyor 5—10 ℃ or more, (depending on the debugging effect to determine)

3. corner down bending

Angle under the bend under the good and the opposite of the corner of the defect, it is the billet all around the bend, the length of about 30mm, the rest of the surface is flat or only a little under the convex. This defect occurs in the middle and sides of the kiln. It is due to the late firing roller plane temperature difference between the upper and lower too large. The solution is the opposite of the above warpage.

①If the kiln size is correct, lower the temperature of the lower part of the roll bar in 2-3 groups (boxes) after firing belt (5—10℃ or higher, depending on the debugging effect) and raise the temperature above the roll path reciprocally.

② If the size of the product after firing is large, then only raise the temperature above the roller conveyor 5 & mdash; 10 ℃ or more, (depending on the debugging effect to determine)

③If the product size after firing is small, then only raise the temperature below the roller conveyor 5—10℃ or more (depending on the debugging effect to determine).

The above is the content brought to you by the Meicheng 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, covering an area of 8W flat. Mainly engaged in: zirconia ceramics, alumina ceramics, talc ceramics and other non-oxide ceramics research and development and application.