In enamel frit, there are many raw materials that play the role of opalizer, the most common ones are titanium oxide, tin oxide, zirconium oxide, antimony oxide, fluorine compounds and so on. Many friends can't tell what they do and what kind of frit they are suitable for. After reading this article, you can thoroughly understand the opalizer and its application.

1. Titanium oxide (TiO2) has strong refractive index, whiteness, stability, covering rate, and acid resistance, and the price is moderate. It is the most commonly used whitening agent;

2. Tin oxide (SnO2) is generally used as a white frit. Its gloss, whiteness, texture and strength are good, but the price is high because it is only used in high-end products or special frits;

3. Zirconia: Zirconia has excellent refractive index and whiteness, but acid resistance and other properties are slightly worse than other opalizer;

4. Antimony oxide: Metal antimony, antimony oxide and sodium antimonate can be used as opalizers, but trivalent antimony cannot be used in tableware and enamelware because of its toxicity. It can only be turned into antimony pentoxide after heating, which is non-toxic. use. Sodium antimonate (NaSbO3) is a strong white opalizer, because of its low melting point and appropriate thermal expansion properties, it is the most suitable opalizer for cast iron white enamel;

5. Fluorine compounds can be used as fluxing agents. They also have certain devitrification properties, and are generally used together with other opalizer to enhance the effect.