V 36 Velocity and absorption of ultrasound in beryllium oxide ceramic [Текст] / V. S. Kiiko, I. R. Shein, M. A. Gorbunova, Yu. N. Makurin, A. L. Ivanovskii // Glass and Ceramics. - 2006. - Vol. 63, № 11-12. - С. 425-430. - Библиогр. : с. 429 (13 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД БЕРИЛЛИЯ -- КЕРАМИКА -- КЕРАМИЧЕСКИЕ МАТЕРИАЛЫ Аннотация: The ultrasound wave propagation velocity and absorption of ultrasound in samples of beryllium ceramics of varying density, shape, and size that differed by the molding method and degree of texturing of BeO microcrystals were investigated at room and low temperatures (approximately 100 K). It was found that the ultrasound propagation velocity increases with an increase in the density of the samples. It was shown that the ultrasound velocity in beryllium ceramics without specially added dopants is weakly dependent on the frequency in the 5 – 25 MHz range Полный текст |