Thermophysical Properties of a New Nonlinear Optical Na3La9O3(BO3)8 Crystal
Thermophysical Properties of a New Nonlinear Optical Na3La9O3(BO3)8 Crystal
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DOI：
10.1021/cg1010743
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发表时间：
2010-09
影响因子：
3.8
通讯作者：
Jianxiu Zhang;Guochun Zhang;Yunge Li;Yang Wu;P. Fu;Yicheng Wu
中科院分区：
文献类型：
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作者：
Jianxiu Zhang;Guochun Zhang;Yunge Li;Yang Wu;P. Fu;Yicheng Wu
采用优化的顶部籽晶溶液生长法（TSSG）生长了质量为45 g、尺寸为38 × 30 × 20 mm 3、光学性能良好的非线性晶体Na 3La 9 O3（BO 3）8（NLBO）。对晶体进行包括熔点、比热、热膨胀、热扩散和硬度的热物理性质，以确定沿沿着不同晶轴的热行为。在20 ~ 300 °C的温度范围内，比热为0.45 - 0.70 J·g-1·K-1，低于β-BaB 2 O 4（BBO）、LiB 3 O 5（LBO）和CsLiB 6 O 10（CLBO）。测得的维氏硬度对于（100）面为1052.67 kg/mm 2，对于（001）面为1239.67 kg/mm 2，其大于大多数常用的硼酸盐晶体，例如BBO、LBO、CsB 3 O 5（CBO）、BiB 3 O 6（BIBO）、KBe 2（BO 3）F2（KBBF）、K2 Al 2B 2 O 7（KABO），等。测得的热膨胀系数为αx = αy = 7.8 × 10 - 6 K-1，αz = 15.3 × 10 - 6 K-1，导致膨胀各向异性比BBO、LBO、BI.弱。
New nonlinear crystal Na3La9O3(BO3)8 (NLBO) with good optical quality and weighing 45 g with size of 38 × 30 × 20 mm3 has been grown by the optimized top-seeded solution growth (TSSG) method. Thermophysical properties including melting point, specific heat, thermal expansion, thermal diffusion, and hardness were performed on the crystal to determine thermal behaviors along different crystallographic axes. The specific heat was measured to be 0.45−0.70 J·g−1·K−1 in the temperature range from 20 to 300 °C, which is lower than that of β-BaB2O4(BBO), LiB3O5 (LBO), and CsLiB6O10 (CLBO). The Vickers hardness were measured to be 1052.67 kg/mm2 for (100) and 1239.67 kg/mm2 for (001) faces, which are greater than most of the commonly used borate crystals such as BBO, LBO, CsB3O5 (CBO), BiB3O6 (BIBO), KBe2(BO3)F2 (KBBF), K2Al2B2O7 (KABO), etc. The thermal expansion coefficients were measured to be αx = αy = 7.8 × 10−6 K−1, and αz = 15.3 × 10−6 K−1, resulting in weaker expansion anisotropy than those of BBO, LBO, BI...