Views: 0 Author: Site Editor Publish Time: 2021-06-15 Origin: Site
What are the factors affecting the sintering process of honeycomb ceramics? The sintering process of honeycomb ceramics is a process in which the blank body is heated under certain conditions to undergo qualitative changes and become honeycomb ceramics products. The sintering process is an important process in the production of honeycomb ceramics, and many factors affect the sintering process and sintering effect.
What are the factors affecting the sintering process of honeycomb ceramics? The main factors affecting the sintering process include the following four aspects:
1. Sintering temperature
The firing temperature is in a certain range, there is no fixed value, but to reach the temperature off the line, to complete the firing of honeycomb ceramics. It is an important step in the sintering process of honeycomb ceramics. The sintering temperature should be kept within the appropriate temperature.
2. Holding time
The holding time affects the composition of the body and the crystal and glass phases. Moderate holding time, so that each part of the billet body reaction is completed, get the desired component and grain size, holding time can not be too long, to prevent the grain growth, also can not be too short, in order to prevent the grain is not fully grown.
3. Lift the cooling speed
Honeycomb ceramics need to adopt slow heating, heating speed can not be too fast, too fast heating rate will lead to different parts of the extruded body heat, affect the force of each part, honeycomb ceramics products cracking problem, so the heating rate should be kept in a certain range during the heating process. The cooling rate should not be too fast, because the cooling rate is reflected in the phase distribution, and too fast cooling will cause defects in the product.
4, burning atmosphere
Firing atmosphere is mainly in order to prevent in the process of burning caused by high temperature oxidation, honeycomb ceramic surface in the event of oxidation, affect the performance of the product, so want to use protective atmosphere to prevent this from happening, and the selection of protective atmosphere to determine their can't react and the selected material, so the selection of protective atmosphere is important.
Honeycomb ceramics sintering conditions in the heating stage in the range of 0-600℃, using slow heating, heating 5℃ per minute, in 600-1000℃, heating 10℃ per minute, in 1000-1800℃, using heating 50℃ per minute.