The influence of the Cr2O3–Mn2O3 colorants system on the spectral characteristics of R2O–PbO–SiO2 glasses

• Published in: International journal of ceramic engineering & science Vol. 6; no. 2
• Main Authors: Petrov, D. V., Bragina, L. L.
• Format: Journal Article
• Language: English
• Published: Westerville John Wiley & Sons, Inc 01.03.2024; Wiley
• Subjects: absorption; Chromium oxides; Coloring agents; Cooling; Gas heating; Glass; glass production; Heat resistance; Homogeneity; Industrial production; Infrared radiation; IR spectral range; Lasers; Lead oxides; Manganese oxides; Metal oxides; optical glass; Quality control; Raw materials; Silicon dioxide; Spectrum analysis; Transmittance
• ISSN: 2578-3270; 2578-3270
• DOI: 10.1002/ces2.10205

The focus of this paper centers on an exploration of optical glasses with high transmittance within the infrared spectrum at wavelength of 1 060 nm, while concurrently demonstrating full absorption within the ultraviolet and visible spectral ranges. The paper analyzes the present state of glasses demonstrating necessary transmittance at IR range, considering their inherent strengths and limitations. In this context, an R2O–PbO–SiO2 glass system with Cr2O3–Mn2O3 colorants system emerges as the subject of this research. Research was conducted to comprehensively assess the impact of this colorant system on the glass spectral characteristics, while considering the potentially detrimental influence of FeO. The principles underlying the industrial production of these glasses are systematically elucidated and presented. It was discovered that using gas heating during the cooling phase of glass melting resulted in the disruption of the spectral homogeneity of the glass, ultimately leading to defective product outcomes. Implementing the methodology of gasless temperature reduction (inertial cooling process) before glass pouring has created a favorable environment for producing high‐quality items. Glass samples from the laboratory tests were obtained, and the researched glass was integrated into serial production. The paper focuses on the impact of colorants in optical glasses for high transmittance within the near infrared spectrum (NIR) spectrum at wavelength of 1 060 nm, with concurrent absorption in the ultraviolet and visible ranges. Principles for the industrial production are discussed.