Zirconium silicate is a non-toxic, odorless white or off-white powder. The raw material is natural high-purity zircon sand concentrate, which is then processed through superfine grinding, iron removal, titanium processing, and surface modification treatment.
Zirconium silicate has a high refractive index of 1.93-2.01 and stable chemical performance. It is a high quality and low price opacifier for opacification. It is widely used in the production of various building ceramics, sanitary ceramics, daily ceramics and first-class handicraft ceramics. Zirconium silicate has been widely used in ceramic production because of its good chemical stability, so it is not affected by the burning atmosphere of ceramic, and can improve the binding performance of ceramic glaze significantly and improve the hardness of ceramic glaze. Zirconium silicate has been further applied in the production of color picture tube, emulsified glass and enamel glaze in the glass industry.
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Zirconium Silicate (ZrSiO₄) is a refractory mineral with high melting point, chemical inertness, and excellent thermal stability, making it ideal for high-temperature industrial applications. It is commonly used as a key raw material in refractory castables, ceramic glazes, zircon bricks, and advanced ceramics.
Due to its high density and low thermal expansion, Zirconium Silicate provides superior resistance to thermal shock, abrasion, and chemical corrosion. It also enhances the mechanical strength and durability of refractory and ceramic products. High-purity zirconium silicate is preferred in applications such as foundry molds, glass furnaces, and metallurgical processes where consistent performance at extreme temperatures is critical.
| Specific Gravity | 4.69 |
| Melting Point | 2500°C |
| Refractive Index | 1.97 |
| Mohs Hardness | 7.5 |
| Thermal Expansion Coefficient | 4.2*10-6 |
| Apprearance | White or off white powder |
| Item | RS65 | RS64.5 | RS63.5 |
| ZrO2+HfO2 | 65.0 min | 64.5 min | 63.5 min |
| Fe2O3 | 0. 06 max | 0. 08 max | 0. 12 max |
| Ti02 | 0.10 max | 0.12 max | 0.18 max |
| Type | Average mesh | Application |
| RS-1.0 | D50≤1.0um | High-grade sanitary porcelain High-grade daily-use porcelain High-grade crystal brick |
| RS-1.2 | D50≤1.2um | |
| RS-1.5 | D50≤1.5um | Middle and low class sanitation porcelain,external and internal brick, archaized brick, engobe, body, etc. |
| RS-2.0 | D50≤2.0um |
1）Building ceramics, sanitary ceramics, daily-use ceramics, special ceramics, etc.（High refractive index 1.93-2.01，Chemical stability，It is an excellent and inexpensive opacifying agent,It is an excellent and inexpensive opacifying agent,In the processing and production of ceramic glaze, the scope of use is wide and the amount of use is large.）
2）Refractory materials and products, glass kiln zirconium ramming material, castable, spray coating, etc. (zirconium silicate melting point is very high :2500℃)
3）TV industry color kinescope, glass industry emulsified glass, enamel glaze production
4）Plastics industry: used as fillers requiring stability, heat resistance and chemical erosion resistance
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