Flux growth and thermal properties of LiBaB9O15 single crystal
Flux growth and thermal properties of LiBaB9O15 single crystal
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DOI：
10.1016/j.materresbull.2011.10.019
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发表时间：
2012-02
影响因子：
5.4
通讯作者：
Shujuan Han;Ji-yang Wang;Jing Li;Yongjie Guo;Yongzheng Wang;Lanling Zhao;Yang Zhang;R. Boughton-R.-Boug
中科院分区：
文献类型：
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作者：
Shujuan Han;Ji-yang Wang;Jing Li;Yongjie Guo;Yongzheng Wang;Lanling Zhao;Yang Zhang;R. Boughton-R.-Boug
在Li2Mo3O10助熔剂体系中，采用顶部籽晶溶液生长(TSSG)法生长了大尺寸LiBaB9O15单晶。得到的晶体具有(110)、(113)和(102)晶面。首次研究了晶体的热性能，包括热膨胀、比热和导热系数随温度的变化。测得LiBaB_9O_(15)晶体在20~400℃温度范围内的比热为0.663~1.110 Jg−1K−_1，在25~500℃温度范围内，晶体沿a、b轴热膨胀，c轴热收缩，平均热膨胀系数分别为αa=6.56×10−_6K−_1和α_c=−4.82×10−_6K−_1。
A large LiBaB9O15single crystal has been grown by the top-seeded solution growth (TSSG) method using a Li2Mo3O10flux system. The crystal obtained exhibits (110), (113) and (102) faces. For the first time, thermal properties of the as-grown crystal, including thermal expansion, specific heat and thermal conductivity, have been investigated as a function of temperature. The specific heat of the LiBaB9O15crystal was measured to be 0.663–1.110Jg−1K−1over the temperature range of 20–400°C. The crystal exhibits thermal expansion along the a- and b-axis, coupled with thermal contraction along the c-axis, over the measured temperature range of 25–500°C. The average thermal expansion coefficients along the a- and c-axis of the LiBaB9O15crystal from 25 to 500°C are calculated to be αa=6.56×10−6K−1and αc=−4.82×10−6K−1, respectively.