Magnesium oxide (MgO) is a crucial additive in mobile phone screen glass, playing a significant role in improving the quality of the glass, controlling crystallization and hardening speed, enhancing melting performance, and increasing chemical stability and hardness. Simultaneously, the index requirements for magnesium oxide are also very stringent to ensure the quality and performance of mobile phone screen glass.
I. 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 properties of the glass melt, reducing the generation of heterogeneous nucleation, thereby improving the transparency and homogeneity of mobile phone screen glass.
- Improving Melting Performance: As a fluxing agent, magnesium oxide can lower the melting temperature of the glass, promote the rapid melting and uniform mixing of raw materials, thus increasing production efficiency.
- Enhancing Glass Quality: High-purity magnesium oxide can reduce the impact of impurities on the optical performance of the glass, improving key indicators such as light transmittance, anti-reflection, and weather resistance of mobile phone screen glass.
- Improving Chemical Stability: Adding a high content of magnesium oxide can enhance the chemical stability of mobile phone screen glass, preventing it from being corroded by substances like hand sweat.
- Increasing Hardness and Drop Resistance: The addition of magnesium oxide also imparts a certain degree of hardness to mobile phone screen glass, improving its drop performance and thus better protecting the phone screen.
II. Index Requirements for Magnesium Oxide Used in Mobile Phone Screen Glass
To ensure the quality and performance of mobile phone screen glass, the index requirements for magnesium oxide are very strict. Generally, magnesium oxide for mobile phone screen glass needs to meet the following indicators:
- Magnesium Oxide (MgO) Content ≥ 99%
- Iron Oxide (Fe₂O₃) Content ≤ 0.005%
- Sulfur (S) Content ≤ 0.03%
- Chloride Ion (Cl⁻) Content ≤ 0.05%
- Calcium (Ca) Content ≤ 0.02%
- Acid Insoluble Matter Content ≤ 0.05%
- Heavy Metal Content must comply with EU ROHS standards
These indicators ensure the purity of magnesium oxide, the content of impurities, and its compatibility with other substances, thereby guaranteeing the quality and performance of mobile phone screen glass.
III. Application Examples of Magnesium Oxide in Mobile Phone Screen Glass
Taking Messi Biology as an example, its high-purity magnesium oxide is particularly suitable for the production and manufacturing of optoelectronic glass and various mobile phone screen glasses. The mobile phone glass special magnesium oxide produced by the company has the characteristics of high purity, high specific gravity, low 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.