Negative thermal expansion and photoluminescence in solid solution (HfSc)(0.83)W2.25P0.83O12-delta
Negative thermal expansion and photoluminescence in solid solution (HfSc)(0.83)W2.25P0.83O12-delta
复制标题
固溶体中的负热膨胀和光致发光 (HfSc)(0.83)W2.25P0.83O12-delta
DOI：
10.1088/1674-1056/26/10/106501
复制
发表时间：
2017
影响因子：
1.7
通讯作者：
Liang Er-Jun
中科院分区：
文献类型：
--
作者：
Liang Yuan;Cheng Yong-Guang;Ge Xiang-Hong;Yuan Bao-He;Guo Juan;Sun Qian;Liang Er-Jun
采用高温固相反应和快淬法合成了（HfSc）0.83W2.25P0.83O12 − δ固溶体。结果表明，该材料具有正交晶系结构，空间群为Pmmm（47），具有低各向异性的负热膨胀（NTE）性质。a、B和c轴的热膨胀系数（CTE）分别为1.41 × 10 − 6 K − 1、− 2.23 × 10 − 6 K − 1和− 1.87 × 10 − 6 K − 1。这导致体积和线性CTE分别为− 3.10 × 10 − 6 K − 1和− 1.03 × 10 − 6 K − 1。此外，它还表现出强烈的光致发光从360 nm到约600 nm。讨论了NTE的机理以及PL与轴向热膨胀性能的关系。
A solid solution of (HfSc) 0.83 W 2.25 P 0.83 O 12− δ is synthesized by the high-temperature, solid-state reaction and fast-quenching method. It is shown that it possesses an orthorhombic structure with space group Pmmm (47) and exhibits negative thermal expansion (NTE) property with low anisotropy in thermal expansion. The coefficients of thermal expansion (CTEs) for a, b, and c axes are 1.41× 10− 6 K− 1,− 2.23× 10− 6 K− 1, and− 1.87× 10− 6 K− 1, respectively. This gives rise to volume and linear CTEs of− 3.10× 10− 6 K− 1 and− 1.03× 10− 6 K− 1, respectively. Besides, it exhibits also intense photoluminescence from 360 nm to about 600 nm. The mechanism of NTE and the correlation of the PL with axial thermal expansion property are discussed.