title: Strength of glass lenses processed in an ultrasonically stimulated chemtempering bath.
abstract: Comparative experiments were performed on conventionally chemtempered lenses and ones chemtempered in an ultrasonically stimulated, slowly oscillated salt bath. With ultrasonic stimulation, a substantially shorter treatment time was found to result in greater strength and greater surface enrichment of K+ ions. The K+-rich surface layer was as deep or deeper than that found in conventionally chem-tempered lenses. The results suggest that the ultrasonic stimulation continually enriches the salt bath with K+ ions in the region of the lens surface.
mesh_terms: D005139:Eyeglasses; D005898:Glass; D011188:Potassium; D013718:Tensile Strength; D014465:Ultrasonics
chemical_list: D011188:Potassium