Advanced Glass Analysis: LIBS for NiS Identification

Glass is a fundamental material in our daily lives, and optimizing its physical properties depends on careful consideration of its chemical composition. During the manufacturing process, impurities like nickel (Ni) and sulfur (S) can unintentionally become part of the glass composition. These two elements, when combined, can form NiS inclusions in glass, appearing as black defects. This not only diminishes the material’s transparency but also introduces a disruptive non-homogeneity, thereby compromising structural integrity and strength. Therefore, the implementation of rigorous quality control measures in the glass manufacturing process is essential to ensure the adherence to the highest standards of quality and durability.

Our team has successfully employed LIBS to detect both S and Ni in glass, providing a reliable solution for identifying NiS inclusion defects. Surprisingly, we achieve accurate and sensitive detection using only the red/IR spectral region. If the measurements are conducted under an argon atmosphere, sensitivity is further enhanced by intensifying S signals.

In contrast with slow SEM analysis usually used for NiS inclusion detection, LIBS emerges as a faster and more cost-effective method. Our Sci-Trace and M-trace devices provide rapid analysis without the need for complex sample preparation, making it an efficient choice for quality control processes in glass manufacturing.

In conclusion, the analysis of Ni and S in glass, particularly concerning NiS inclusion defects, is pivotal for ensuring the material’s transparency and strength. LIBS stands out as a superior alternative to SEM, offering a quick, cost-effective, and reliable solution for detecting these impurities. For a fraction of investment and running costs, LIBS brings 40 times faster results and higher throughput. As the glass industry continues to evolve, the implementation of advanced techniques like LIBS can significantly contribute to maintaining high-quality standards in glass production.

Spontaneous glass breakage can occur when Nickel Sulphide crystals are present within the toughened glass sample.