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C-plane sapphire windows and LED substrates; LED filaments, precision hardware, stainless steel logo
metallurgical uses; added to vanadium, f. e., erbium lowers hardness and improves workability
TFT-LCD glass; cover glass for mobile phone; protective glass for mobile phone
mobile phone cover plate surface; mobile phone edges polishing and holes grinding; Filler material of polishing...
used for making optical glass and gadolinium yttrium garnets, for making phosphors for colour TV tube