How does calcined zinc oxide improve the performance and quality of ceramic products?
Publish Time: 2025-06-11
In the modern ceramic industry, calcined zinc oxide is widely used as a key additive in the production process of various ceramic products. It can not only significantly improve the physical and chemical properties of ceramic products, but also improve their appearance and durability. In order to improve the physical properties of raw zinc oxide extracted by zinc vapor such as direct zinc oxide and indirect zinc oxide and the influence of its related chemical composition on ceramic glazes, heavy calcined zinc oxide is obtained after high-temperature treatment and calcination. This material has many unique advantages, which are specifically reflected in the following aspects.
First, calcined zinc oxide has a large specific gravity and good fluidity. Compared with untreated zinc oxide, calcined zinc oxide has a higher density and a denser structure after high-temperature calcination. This makes it more dispersed and uniform in ceramic glazes, which helps to improve the overall performance of glazes. In addition, due to the good fluidity of calcined zinc oxide, it is easier to mix evenly with other ingredients when preparing glazes, reducing quality problems caused by uneven distribution. The shrinkage rate of the glaze made of it is small, and the glaze surface is not prone to pinholes and cracks, which improves the quality and aesthetics of the finished product.
Secondly, calcined zinc oxide has excellent stability at high temperatures. The melting point of calcined zinc oxide is as high as 1975℃, which allows it to remain stable during high-temperature sintering and will not easily decompose or volatilize. This is especially important for ceramic products that need to be sintered at high temperatures. Calcined zinc oxide can promote the bonding between particles under high temperature conditions and enhance the firmness and durability of the ceramic structure. At the same time, calcined zinc oxide can also reduce the expansion coefficient of the glaze at high temperatures, improve the thermal stability of the product, and prevent cracking or deformation caused by temperature changes.
Furthermore, calcined zinc oxide can significantly improve the gloss and whiteness of the glaze. Adding an appropriate amount of calcined zinc oxide to ceramic glazes can increase the gloss of the glaze and make the product surface smoother and brighter. This is because calcined zinc oxide has a strong dynamic melting effect at high temperatures, which can effectively adjust the melting range of the glaze, so that the glaze forms a more uniform and delicate glaze layer during the sintering process. In addition, calcined zinc oxide can also improve the whiteness of the glaze, giving ceramic products a purer white tone and enhancing the visual appeal of the product.
In addition, calcined zinc oxide also plays an important role in improving the elasticity of the glaze. By adjusting the chemical composition of the glaze, calcined zinc oxide can enhance the elasticity of the glaze and reduce cracks and breakage caused by external forces. Especially in architectural ceramic wall and floor tile glazes and low-temperature porcelain glazes, calcined zinc oxide is widely used. It can not only increase the elasticity of the glaze, but also expand the melting range of the glaze, making the glaze more tough and durable. For artistic ceramic glazes, calcined zinc oxide also plays an important role, enhancing the artistic value and ornamental value of the work.
It is worth mentioning that calcined zinc oxide is also widely used in ceramic colorants. Due to its unique crystal structure and chemical properties, calcined zinc oxide can react with a variety of metal oxides to produce colorful and stable ceramic pigments. These pigments not only have good tinting power and hiding power, but also can maintain the original color and gloss during high-temperature sintering, adding artistic value to ceramic products. The application of calcined zinc oxide in ceramic colorants not only enriches the color selection of products, but also improves the stability and durability of colors.
From the perspective of production process, the purity and particle size control of calcined zinc oxide are crucial to its application effect. High-purity calcined zinc oxide can ensure the quality consistency of ceramic products and avoid the adverse effects caused by the introduction of impurities. At the same time, fine and uniform particle distribution helps to improve the dispersibility of calcined zinc oxide in ceramic slurry and ensure its optimal performance during molding and sintering. Therefore, choosing high-quality calcined zinc oxide is an important prerequisite for ensuring the quality of ceramic products.
From the perspective of economic benefits, although the initial investment of calcined zinc oxide may be slightly higher than that of ordinary zinc oxide, due to its excellent performance and long life, it can significantly reduce maintenance and replacement costs in the long run. More importantly, the application of calcined zinc oxide simplifies the production process and reduces the defective rate, bringing more indirect benefits to the enterprise.
Calcined zinc oxide has significantly improved the performance and quality of ceramic products through its large specific gravity and good fluidity, excellent high temperature stability, ability to significantly improve glaze gloss and whiteness, characteristics of improving glaze elasticity, and wide application in ceramic colorants. Whether it is facing high-end precision ceramics or daily consumer products, calcined zinc oxide can provide reliable and efficient solutions. For ceramic engineering projects that pursue efficiency, safety and reliability, choosing calcined zinc oxide is undoubtedly a wise choice. It not only improves product quality, but also brings convenience to future maintenance work. It is an indispensable and important material in the modern ceramic industry.
