In the ceramic manufacturing industry, the quality of firing directly impacts product quality and production efficiency. One common issue is the frequent warping of sanitary ware during firing. Surprisingly, the root cause might not lie in the坯体 but in the tray materials used. This article delves into the key factors affecting the firing quality of ceramic products, with a focus on the performance of composite corundum-mullite trays.
The properties of tray materials play a crucial role in the firing process of ceramic products. Thermal stability, thermal shock resistance, wear resistance, and chemical inertness are the core factors. A tray with good thermal stability can maintain its shape and performance under high - temperature conditions, reducing the risk of deformation. High thermal shock resistance allows the tray to withstand rapid temperature changes without cracking or breaking. Wear resistance ensures a long service life, while chemical inertness prevents chemical reactions with the ceramic products during firing.
Different application scenarios have different performance requirements for trays. For example, in the production of sanitary ware, which is prone to warping, trays with high thermal shock resistance are essential. In the case of mosaic production, trays need to have good flatness to ensure the quality of the final product. Roof tiles require trays with high wear resistance due to their relatively large size and weight.
| Application Scenario | Key Performance Requirement |
|---|---|
| Sanitary Ware | High Thermal Shock Resistance |
| Mosaic | Good Flatness |
| Roof Tiles | High Wear Resistance |
In the temperature range of 1000°C - 1400°C, different temperature intervals pose different deformation risks and require different life - control methods. For example, in the lower temperature range (1000°C - 1200°C), the risk of deformation is relatively low, but the tray still needs to have good thermal stability. As the temperature rises to 1200°C - 1400°C, the risk of deformation increases significantly, and trays with higher thermal shock resistance and high - temperature stability are required.
Compared with traditional refractory bricks and ordinary ceramic trays, composite corundum - mullite trays have significant advantages. Traditional refractory bricks are relatively heavy and have poor thermal shock resistance. Ordinary ceramic trays may not be able to withstand high - temperature conditions for a long time. Composite corundum - mullite trays, on the other hand, have excellent thermal shock resistance, high - temperature stability, and wear resistance.
According to industry data, using composite corundum - mullite trays can increase the firing yield of sanitary ware by about 15% and reduce the scrap rate by about 10%.
Let's take a ceramic factory as an example. This factory used to have a high scrap rate of sanitary ware due to warping during firing. After switching to composite corundum - mullite trays, the scrap rate decreased significantly. By analyzing the problem, the factory found that the original trays had poor thermal shock resistance, which led to cracking and deformation during the rapid temperature change in the firing process. The new trays solved this problem effectively.
In conclusion, choosing the right tray material is crucial for improving the firing quality of ceramic products. Composite corundum - mullite trays offer a reliable solution for many ceramic manufacturers. If you want to learn more about ceramic tray material selection and get professional technical guidance, click Get the 'Ceramic Tray Selection White Paper' PDF.
