99.6% high-purity crystalline potassium nitrate is a high-quality raw material specially used for chemical strengthening of optical glass and mobile phone glass
Our 99.6% high-purity crystalline potassium nitrate is a raw material developed for the chemical strengthening of high-end optical glass, precision optical components and glass parts for optoelectronic equipment. It is made for optical-glass applications, with stable chemistry and low impurity levels. Used in the strengthening bath, it helps raise the mechanical strength, surface hardness and weather resistance of the glass while keeping its optical properties intact.
Core advantages of the product
Optical-grade purity standard
- Purity ≥ 99.6%, with heavy-metal ion content kept under tight control
- Very low chloride (typical result < 0.0025%) to help protect the glass surface from corrosion
- Low calcium and magnesium impurities to support optical uniformity
Dependable optical performance
- Designed to keep the light-transmittance loss of strengthened optical glass below 0.5%
- Helps control stress birefringence to protect imaging quality
- Helps avoid white haze and rainbow patterns during strengthening
Improve efficiency and yield
High-purity raw material means less impurity interference. This helps lower the defect rate in glass strengthening and gives your production line better output and economics.
Parameter
| Test Item | Technical Indicator | Test Result |
|---|---|---|
| Potassium nitrate (KNO₃) | ≥ 99.6% | 99.9% |
| Moisture | ≤ 0.15% | 0.10% |
| Water Insolubles | ≤ 0.03% | 0.01% |
| Chloride ion (Cl⁻) | ≤ 0.02% | < 0.0025% |
Application field
- Consumer electronics optical glass
- Precision optical instruments
- Industrial and special-purpose optics
Packaging, Storage and Safety Instructions
- Packaging: 25 kg or 50 kg bags, or 1-ton bags.
- Storage: keep in a cool, dry, well-ventilated warehouse, away from fire and heat sources and from reducing substances.
- Safe operation: in a molten-salt strengthening system, keep the medium clean. Never let it contact water, organic matter or reducing substances, as this can cause violent reactions.
- Control the heating rate strictly to avoid sudden heating or cooling of the system.
Why choose us?
- Experienced supply: our production partner has long-term cooperation with glass cover-plate manufacturers and supplies the consumer-electronics supply chain.
- Technology and quality: continuous investment in research and development keeps product quality stable, and our production partner takes part in drafting national standards.
- Quality assurance: the product has passed HF and RoHS testing by the third-party laboratory SGS, meeting strict international environmental and safety requirements.
Consult now to get exclusive samples and solutions
If you need a high-performance, stable potassium nitrate for optical-glass strengthening, our 99.6% high-purity crystalline potassium nitrate is a strong choice. Contact us to request samples and detailed technical data, and our expert team will support you.