ceramic opaque zirconium silicate
Zibo Heli Glaze Co., Ltd. [China] 
high quality of zirconium silicate zircon
| Chemical composition | (YB834-87)Ministry-issude Standards for zircon products | ||||||
| Super | Grade 1 | Grade 2 | Grade 3 | Grade 4 | Grade 5 | ||
| (Zr.Hr)O2 | ≥66.00 | ≥65.00 | ≥65.00 | ≥65.00 | ≥63.00 | ≥60.00 | ≥55.00 |
| TiO2 | ≤0.08 | ≤0.15 | ≤0.50 | ≤1.00 | ≤2.50 | ≤3.50 | ≤8.00 |
| Fe2O3 | ≤0.06 | ≤0.10 | ≤0.25 | ≤0.30 | ≤0.50 | ≤0.80 | ≤1.50 |
| P2O3 | ≤0.20 | ≤0.25 | ≤0.35 | ≤0.50 | ≤0.80 | ≤1.50 | |
| Al2O3 | ≤0.80 | ≤0.80 | ≤0.80 | ≤1.00 | ≤1.20 | ≤1.50 | |
| SiO2 | ≤32.00 | ≤32.00 | ≤34.00 | ≤34.00 | ≤33.00 | ≤32.00 | ≤31.00 |
ceramic opaque zirconium silicate
