In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga2O3-B2O3-SiO2（GBS） system magneto-optical glasses were prepared by the m...In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga2O3-B2O3-SiO2（GBS） system magneto-optical glasses were prepared by the melt quenching technique. The infl uence of Tb3＋ and Dy3＋ ions on the structure of GBS glasses was investigated using FTIR, DSC and Faraday rotations. The experimental results showed that the content of rare-earth oxides in the glasses with the double incorporation of Tb2O3 and Dy2O3 was higher. The crystallization parameter β achieved the maximum 0.48 with Tb3＋/Dy3＋ content of 35mol%. Terbium oxide existed mainly in [TbO3] units in the glasses and [TbO4] units were converted into [TbO3] with increasing Tb2O3 content. As Ga3＋ ion is larger than B3＋ ion in radius, leading to an increasing of the glass network gap and improvement in the ability of accommodating rare earth ions, Verdet constant increased.展开更多
We used yttrium acetate, barium acetate, and copper acetate as the starting materials, benzalacetone (BzAcH) as chemical modifier, and methanol (MEOH) as solvent to synthesize a stable fluorine-free YBCO precursor sol...We used yttrium acetate, barium acetate, and copper acetate as the starting materials, benzalacetone (BzAcH) as chemical modifier, and methanol (MEOH) as solvent to synthesize a stable fluorine-free YBCO precursor sol. The coated YBCO gel film using this precursor sol exhibited photosensitivity to UV irradiation at a wavelength of 330 nm. After the subsequent exposing, the YBCO gel film showed a decreased solubility in several organic solvents. Based on the photosensitivity of the YBCO/BzAcH gel film, YBCO superconducting microarray with the pitch of 5 μm was fabricated by irradiating the gel film with UV light through a mask, followed by leaching the unirradiated area in a mixture solvent of methanol and n-butyl alcohol with the volume ratio of 1:1. After proper heat treatment the x-ray diffraction result showed that the as-prepared arrays were highly c-axis oriented and with a high T c by this new photosensitive sol-gel process.展开更多
A novel process for fabricating high-density and high diffraction efficiency inor- ganic gratings has been proposed by combining laser interference and chemical etching. In the present work, UV photosensitive Zr-conta...A novel process for fabricating high-density and high diffraction efficiency inor- ganic gratings has been proposed by combining laser interference and chemical etching. In the present work, UV photosensitive Zr-contained sol was synthesized, and photosensitive ZrO2/BzAc gel films on (100) silicon were prepared using the sol-gel method. Subsequently, inorganic film gratings with a pitch of 1 μm were fabricated by laser interference in this photosensitive gel film combining with the process of heat treatment. In order to increase the depth-to-width ratio of the grat- ings, chemical etching was adopted by using iodine-saturated KOH as anisotropic etchant, which improved the diffraction efficiency of the gratings effectively. Fur- thermore, the diffraction efficiency was improved by gold coating to enhance the surface glossiness and reflection coefficient.展开更多
基金Funded by the International Exchanges and Cooperation Projects(No.2009DFR50520)the Optional Research Project of Shaanxi University of Science and Technology(ZX/11-13)the Scientifi c Research Initial Funding of Shaanxi University of Science and Technology(BJ12-01)
文摘In order to increase the content of rare-earth oxides in magneto-optical glass and improve the Verdet constant, the rare-earth doped ternary Ga2O3-B2O3-SiO2（GBS） system magneto-optical glasses were prepared by the melt quenching technique. The infl uence of Tb3＋ and Dy3＋ ions on the structure of GBS glasses was investigated using FTIR, DSC and Faraday rotations. The experimental results showed that the content of rare-earth oxides in the glasses with the double incorporation of Tb2O3 and Dy2O3 was higher. The crystallization parameter β achieved the maximum 0.48 with Tb3＋/Dy3＋ content of 35mol%. Terbium oxide existed mainly in [TbO3] units in the glasses and [TbO4] units were converted into [TbO3] with increasing Tb2O3 content. As Ga3＋ ion is larger than B3＋ ion in radius, leading to an increasing of the glass network gap and improvement in the ability of accommodating rare earth ions, Verdet constant increased.
基金supported by the National Natural Science Foundation of China (Grant No. 51072163)the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20096118110002)the Special Funds for the Construction of Key Disciplines Project of Shanxi Province
文摘We used yttrium acetate, barium acetate, and copper acetate as the starting materials, benzalacetone (BzAcH) as chemical modifier, and methanol (MEOH) as solvent to synthesize a stable fluorine-free YBCO precursor sol. The coated YBCO gel film using this precursor sol exhibited photosensitivity to UV irradiation at a wavelength of 330 nm. After the subsequent exposing, the YBCO gel film showed a decreased solubility in several organic solvents. Based on the photosensitivity of the YBCO/BzAcH gel film, YBCO superconducting microarray with the pitch of 5 μm was fabricated by irradiating the gel film with UV light through a mask, followed by leaching the unirradiated area in a mixture solvent of methanol and n-butyl alcohol with the volume ratio of 1:1. After proper heat treatment the x-ray diffraction result showed that the as-prepared arrays were highly c-axis oriented and with a high T c by this new photosensitive sol-gel process.
基金the National Natural Science Foundation of China (Grant No. 90401009) the Xi’an Applied Materials Innovation Fund (Grant No. XA-AM-200611)
文摘A novel process for fabricating high-density and high diffraction efficiency inor- ganic gratings has been proposed by combining laser interference and chemical etching. In the present work, UV photosensitive Zr-contained sol was synthesized, and photosensitive ZrO2/BzAc gel films on (100) silicon were prepared using the sol-gel method. Subsequently, inorganic film gratings with a pitch of 1 μm were fabricated by laser interference in this photosensitive gel film combining with the process of heat treatment. In order to increase the depth-to-width ratio of the grat- ings, chemical etching was adopted by using iodine-saturated KOH as anisotropic etchant, which improved the diffraction efficiency of the gratings effectively. Fur- thermore, the diffraction efficiency was improved by gold coating to enhance the surface glossiness and reflection coefficient.
