Sitall Glass-Ceramic Treatment Technology for the Case of Etching and Cleaning of a Ring Laser Monolithic Crystal

The paper uses production of the main part of a ring laser, that is a monolithic sitall crystal, as an example to describe the main stages of manufacturing and chemical processing of the SO-115M lithium aluminosilicate sitall glass-ceramic material. We analysed composition optimisation and glass-ceramic production methods and investigated the effects of various components (such as glass formers, modifiers, and clarifiers) on the optical performance of the finished article. We describe the sequence of main monolithic crystal processing operations: etching and cleaning, which includes degreasing, ultrasonic treatment, rinsing and drying. We tested an original etchant formulation and present an etching rate calculation for it. We selected a solution for ultrasonic cleaning of the article and assessed the resulting surface finish quality

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