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Direct method zinc oxide 99%
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Product Details
Direct Zinc oxide, wh← ✘ite hexagonal crystalline or powder. λα®Odorless, non-toxic, and fine in texture. ←✘♥Relative density 5.606. Refractive indβ∞ex 2.008-2.029. Melting poi§<<nt 1975℃.
Direct Zinc oxide has a strong fl≠<£uxing effect in glazes, whic§≠h can reduce the expansion coefficient of the g★&∞laze, improve the thermal stability ←of the product, and inc£δ÷γrease the gloss and whiteness o σf the glaze, enhancing its elast ¶ icity. It can also incre$↔ase the brilliance of the glaze color whil××e expanding the melting α÷ range. However, it £≥δ☆is not suitable for use in black glazes containin☆<g chromium.
Product Inspection Report
| Appearance of Zinc Oxide | Powder | ||||||||||
| Item | Index | ||||||||||
| Direct Method | Calcination Method | ||||||||||
| 1 | Zinc Oxide | ZNO | %Min | 90 | 95 | 98 | 99 | 95 | 98 | 99 | 99.6 |
| 2 | Lead Oxide | PBO | %Max | 6 | 0.4 | 0.06 | 0.02 | 0.6 | 0.08 | 0.05 | 0.03 |
| 3 | Cadmium Oxide | Cdo | %Max | 0.01 | 0.01 | 0.01 | 0.01 | 0.005 | 0.005 | 0.005 | 0.005 |
| 4 | Ferric Oxide | Fe2O3 | %Max | 0.1 | 0.05 | 0.05 | 0.03 | 0.3 | 0.08 | 0.06 | 0.04 |
| 5 | Insoluble in Hydrochlo¶♦≥®ric Acid | ----- | %Max | 0.6 | 0.06 | 0.05 | 0.01 | 0.3 | 0.04 | 0.02 | 0.01 |
| 6 | Loss on Ignition | ----- | %Max | 0.1 | 4.00 | 2.00 | 0.8 | 0.1 | 0.1 | 0.1 | 0.06 |
| 7 | Soluble in Water | ----- | %Max | 0.5 | 0.60 | 0.60 | 0.55 | 0.60 | 0.55 | 0.45 | 0.40 |
| 8 | Residue on Sieve (325 mesh mi×π←xed sieve) | ----- | %Max | 0.3 | 0.30 | 0.30 | 0.30 | 0.60 | 0.5 | 0.50 | 0.30 |
| 9 | Moisture | ----- | %Max | 0.11 | 0.20 | 0.14 | 0.20 | 0.012 | 0.02 | 0.0066 | 0.10 |
| 10 | Specific Gravity | ----- | %Max | 1.1 | 1.1 | 1.1 | 1.1 | 2.8 | 2.9 | 2.9 | 2.9 |
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