Search

Your search keyword '"Jung, IL-Hyoung"' showing total 24 results
Start Over Author "Jung, IL-Hyoung"
24 results on '"Jung, IL-Hyoung"'

19. Growth of La3−xBaxTa0.5+x/2Ga5.5−x/2O14 compounds for the high-temperature piezoelectric applications

Author

Jung, Il Hyoung, Yang, Won Jae, Yoshikawa, Akira, Fukuda, Tsuguo, and Auh, Keun Ho

Subjects
*IONS, *CRYSTALS, *PIEZOELECTRIC materials, *MATHEMATICAL formulas
Abstract

Alkali-earth ion (Ba2+) substituted La3Ta0.5Ga5.5O14 (LTG) crystals with a chemical formula of La3−xBaxTa0.5+x/2Ga5.5−x/2O14 (LBTG), suitable for piezoelectric applications, were grown by the micro-pulling-down (μ-PD ) and Czochralski technique. Powder X-ray diffraction analysis had been shown that Ba2+ could be substituted for La3+ up to x=0.2 in LTG crystals. A structure analysis revealed that Ba atoms are mainly distributed in decahedral sites occupied by La atoms. Grown LBTG crystals showed higher value of d14 and K12 than LTG. [Copyright &y& Elsevier]

Published
2004
Full Text
View/download PDF

20. Growth and structure of A3NbGa3Si2O14 (A=Sr, Ca) compounds

Author

Jung, Il Hyoung, Yoshikawa, Akira, Fukuda, Tsuguo, and Auh, Keun Ho

Subjects
*CRYSTAL growth, *X-ray crystallography
Abstract

A3NbGa3Si2O14 (A=Sr, Ca) compounds were grown using the Czochralski method after preparing by solid-state reaction. X-ray structure analysis of grown Sr3NbGa3Si2O14 (SNGS) and Ca3NbGa3Si2O14 (CNGS) single crystals showed that they were isostructural to that of Ca3Ga2Ge4O14, which had space group P321. The lattice constants of SNGS and CNGS were calculated to be a=8.282, 8.087 and c=5.073, 4.980 A˚, respectively. The final R and Rw values for the refinement were 0.0353 and 0.0354, respectively. Piezoelectric properties of these crystals were measured. [Copyright &y& Elsevier]

Published
2002
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results