TY - JOUR
T1 - Synthesis and nonlinear optical properties of BaTi(BO3) 2 and Ba3Ti3O6(BO3) 2 crystals in glasses with high TiO2 contents
AU - Kosaka, Shinji
AU - Benino, Yasuhiko
AU - Fujiwara, Takumi
AU - Dimitrov, Vesselin
AU - Komatsu, Takayuki
N1 - Funding Information:
This work was supported from the SCOPE (Strategic Information and Communications R&D Promotion Program) project by the ministry of Public Management, Home Affairs, Posts and Telecommunications, Japan, from the Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sport, Culture, and Technology, Japan, and from the 21st Century Center of Excellence (COE) Program in Nagaoka University of Technology.
PY - 2005/6
Y1 - 2005/6
N2 - The ternary BaO-TiO2-B2O3 glasses containing a large amount of TiO2 (20-40 mol%) are prepared, and their optical basicities (Λ), the formation, structural features and second-order optical nonlinearities of BaTi(BO3)2 and Ba3Ti3O6(BO3)2 crystals are examined to develop new nonlinear optical materials. It is found that the glasses with high TiO2 contents of 30-40 mol% show large optical basicities of Λ=0.81-0.87, suggesting the high polarizabity of TiO n polyhedra (n=4-6) in the glasses. BaTi(BO3)2 and Ba3Ti3O6(BO3)2 crystals are found to be formed as main crystalline phases in the glasses. It is found that BaTi(BO3)2 crystals tend to orient at the surface of crystallized glasses. The new XRD pattern for the Ba 3Ti3O6(BO3)2 phase is proposed through Rietvelt analysis. The second harmonic intensities of crystallized glasses were found to be 0.8 times as large as α-quartz powders, i.e., I2ω(sample)/I2ω(α-quartz)=0.8, for the sample with BaTi(BO3)2 crystals and to be I2ω(sample)/ I2ω(α-quartz)=68 for the sample with Ba3Ti 3O6(BO3)2 crystals. The Raman scattering spectra for these two crystalline phases are measured for the first time and their structural features are discussed.
AB - The ternary BaO-TiO2-B2O3 glasses containing a large amount of TiO2 (20-40 mol%) are prepared, and their optical basicities (Λ), the formation, structural features and second-order optical nonlinearities of BaTi(BO3)2 and Ba3Ti3O6(BO3)2 crystals are examined to develop new nonlinear optical materials. It is found that the glasses with high TiO2 contents of 30-40 mol% show large optical basicities of Λ=0.81-0.87, suggesting the high polarizabity of TiO n polyhedra (n=4-6) in the glasses. BaTi(BO3)2 and Ba3Ti3O6(BO3)2 crystals are found to be formed as main crystalline phases in the glasses. It is found that BaTi(BO3)2 crystals tend to orient at the surface of crystallized glasses. The new XRD pattern for the Ba 3Ti3O6(BO3)2 phase is proposed through Rietvelt analysis. The second harmonic intensities of crystallized glasses were found to be 0.8 times as large as α-quartz powders, i.e., I2ω(sample)/I2ω(α-quartz)=0.8, for the sample with BaTi(BO3)2 crystals and to be I2ω(sample)/ I2ω(α-quartz)=68 for the sample with Ba3Ti 3O6(BO3)2 crystals. The Raman scattering spectra for these two crystalline phases are measured for the first time and their structural features are discussed.
KW - BaTi(BO )
KW - BaTiO(BO )
KW - Crystallized glass
KW - Electronic polarizability
KW - Glass
KW - Nonlinear optical crystals
KW - Raman scattering spectra
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U2 - 10.1016/j.jssc.2005.04.023
DO - 10.1016/j.jssc.2005.04.023
M3 - Article
AN - SCOPUS:19344377038
SN - 0022-4596
VL - 178
SP - 2067
EP - 2076
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
IS - 6
ER -