Magnesium oxide is a key additive in mobile phone screen glass. It plays an important role in improving the quality of mobile phone screen glass, controlling crystallization and hardening speed, improving melting performance, and improving chemical stability and hardness. At the same time, the index requirements for magnesium oxide are also very strict to ensure the quality and performance of mobile phone screen glass.
1. The role of magnesium oxide in mobile phone screen glass
Controlling crystallization and hardening speed: Magnesium oxide can effectively control the hardening speed and crystallization performance of glass liquid, reduce the generation of heterogeneous crystallization, and thus improve the transparency and uniformity of mobile phone screen glass.
Improve melting performance: As a flux, magnesium oxide can reduce the melting temperature of glass, promote rapid melting and uniform mixing of raw materials, and thus improve production efficiency.
Improve glass quality: High-purity magnesium oxide can reduce the impact of impurities on the optical properties of glass, and improve the key indicators of mobile phone screen glass such as light transmittance, anti-reflection and weather resistance.
Improve chemical stability: By adding a high content of magnesium oxide, the chemical stability of mobile phone screen glass can be improved to prevent it from being eroded by substances such as hand sweat.
Enhanced hardness and drop resistance: The addition of magnesium oxide also brings a certain hardness to the mobile phone screen glass, improves its drop resistance, and thus better protects the mobile phone screen.
2. Index requirements for magnesium oxide for mobile phone screen glass
In order to ensure the quality and performance of mobile phone screen glass, the index requirements for magnesium oxide are very strict. Generally speaking, magnesium oxide for mobile phone screen glass needs to meet the following indicators:
Magnesium oxide content ≥ 99%
Iron oxide content ≤ 0.005%
Sulfur content ≤ 0.03%
Chloride ion content ≤ 0.05%
Calcium content ≤ 0.02%
Acid insoluble content ≤ 0.05%
Heavy metal content must comply with EU ROSH standards
These indicators ensure the purity, impurity content and compatibility of magnesium oxide with other substances, thereby ensuring the quality and performance of mobile phone screen glass.
3. Application examples of magnesium oxide in mobile phone screen glass
Taking Messi Biology as an example, the high-purity magnesium oxide produced by the company is particularly suitable for the production and manufacturing of optoelectronic glass and various mobile phone screen glasses. The mobile phone glass-specific magnesium oxide produced by the company has the characteristics of high purity, high specific gravity, few calcium and iron impurities, and low chloride content. It can be well integrated with glass components to improve the quality of mobile phone screen glass.