Line patterning of (Sr,Ba)Nb2O6 crystals in borate glasses by transition metal atom heat processing
Line patterning of (Sr,Ba)Nb2O6 crystals in borate glasses by transition metal atom heat processing
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DOI：
10.1016/j.jssc.2007.06.026
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发表时间：
2007-09
影响因子：
3.3
通讯作者：
M. Sato;T. Honma;Y. Benino;T. Komatsu
中科院分区：
文献类型：
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作者：
M. Sato;T. Honma;Y. Benino;T. Komatsu
本文研究了掺NiO的Bi_2 O_3，La_2 O_3-SrO-BaO-Nb_2 O_5-B_2 O_3玻璃，通过常规的电炉晶化，得到了具有四钨青铜结构的Sr_0.5Ba_0.5Nb_2 O_6（SBN）晶体，并通过热辅助晶化在玻璃表面形成了SBN晶体线（250-300°C）激光照射和连续波Nd：YAG激光器（波长：1064 nm）的扫描。通过激光共聚焦扫描显微镜和偏振显微拉曼散射光谱的测量，研究了SBN晶体的表面形貌和晶体线的质量。SBN晶体线的表面形貌随激光扫描条件的变化从周期性的凸起结构向均匀结构转变。在激光功率P= 1 W，扫描速度S=1μm/s的条件下，在2NiO-4La_2 O_3 - 16 SrO-16 BaO-32 Nb_2 O_5 - 30 B_2 O_3玻璃中形成的条纹，有可能使SBN晶体沿激光扫描方向沿着取向。本研究表明，过渡金属原子热处理（即，连续Nd：YAG激光和Ni ~（2+）离子的组合）是一种在玻璃中空间选择性结晶SBN晶体的新技术。
Some NiO-doped Bi2O3,La2O3–SrO–BaO–Nb2O5–B2O3glasses giving the formation of strontium barium niobate Sr0.5Ba0.5Nb2O6(SBN) crystals with a tetragonal tungsten–bronze structure through conventional crystallization in an electric furnace have been developed, and SBN crystal lines have been patterned on the glass surface by heat-assisted (250–300°C) laser irradiation and scanning of continuous-wave Nd:YAG laser (wavelength: 1064nm). The surface morphology and the quality of SBN crystal lines are examined from measurements of confocal scanning laser micrographs and polarized micro-Raman scattering spectra. The surface morphology of SBN crystal lines changes from periodic bump structures to homogeneous structures, depending on laser scanning conditions. It is suggested that the line patterned at the laser irradiation condition of laser power P=1W and of laser scanning speed S=1μm/s in 2NiO–4La2O3–16SrO–16BaO–32Nb2O5–30B2O3glass has a possibility of the orientation of SBN crystals along the laser scanning direction. The present study demonstrates that the transition metal atom heat processing (i.e., a combination of cw Nd:YAG laser and Ni2+ions) is a novel technique for spatially selected crystallization of SBN crystals in glass.