Ultrasonic microspectroscopy characterization of silica glass

Jun Ichi Kushibiki, Ting Cun Wei, Yuji Ohashi, Akira Tada

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


Ultrasonic microspectroscopy technology, using the line-focus-beam and plane-wave ultrasonic material characterization system, is applied to characterization of silica glass. Eight types of commercial silica glasses fabricated by different production methods and conditions are used as specimens to measure their acoustic properties accurately, viz., acoustic velocity, density, elastic constant. The variations in those acoustic properties resulting from small amounts of impurities, such as hydroxyl (OH) and chlorine, incorporated during the production processes were quantitatively obtained. The longitudinal velocity, density, and elastic constant c11 of silica glass with 860 ppm OH ions were less by 0.28%, 0.06%, and 0.62%, respectively, than those for OH-free silica glass, while the temperature coefficient of the longitudinal velocity was greater by 7.4%. In contrast, the leaky surface acoustic wave velocity, shear velocity and elastic constant C44 of silica glass containing 1500 ppm residual chlorine were less by 0.23%, 0.30%, and 0.59%, respectively, than those of OH-free and chlorine-free silica glass, while the longitudinal velocity, elastic constant C11, and density increased slightly by 0.04%, 0.10%, and 0.02%, respectively. Further, it was found that the decrease in acoustic velocity due to OH or chlorine is mainly related to the decrease in the elastic constant, which also corresponds to the decrease in the viscosity of the SiO2 material. These results demonstrate that the ultrasonic method is very useful and effective for analyzing and evaluating both the glass properties and the production processes.

Original languageEnglish
Pages (from-to)3113-3121
Number of pages9
JournalJournal of Applied Physics
Issue number6
Publication statusPublished - 2000 Mar 15


Dive into the research topics of 'Ultrasonic microspectroscopy characterization of silica glass'. Together they form a unique fingerprint.

Cite this