Synthesis and characterization of negative thermal expansion of the Zr2(WO4)(PO4)2 system
Synthesis and characterization of negative thermal expansion of the Zr2(WO4)(PO4)2 system
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Zr2(WO4)(PO4)2体系的合成及负热膨胀表征
DOI：
10.1142/s0217984922420210
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发表时间：
2022
影响因子：
1.9
通讯作者：
Inoue Norimasa
中科院分区：
文献类型：
--
作者：
Murai Kei-Ichiro;Moriga Toshihiro;Takahashi Masaru;Koizumi Tetsuta;Inoue Norimasa
在本研究中，钛和钼取代的ZR2(WO)粉末是用传统的固相反应技术合成的。用原位高温X射线衍射法计算了样品的热膨胀系数。掺钛减少了垂直于键轴的热振动椭球所占据的空位。另一方面，通过掺杂与氧原子结合能较小的Mo，促进了在键轴方向的热振动。分析认为，由于Ti、Mo共掺杂的协同作用抑制了垂直于耦合轴的椭圆热振动，平均线膨胀系数变为零。
In this study, Ti- and Mo-substituted Zr2(WO(POwere synthesized using a conventional solid-state reaction technique. Coefficients of thermal expansions for samples were calculated by the results from thein situhigh-temperature X-ray diffraction method. Doping with Tireduces the voids occupied by the thermal vibration ellipsoid perpendicular to the bond axis. On the other hand, by doping Mo, which has a smaller binding energy with oxygen atoms, thermal vibration in the direction of the bond axis is promoted. It is considered that the average linear thermal expansion coefficient became zero because the elliptical thermal vibration perpendicular to the coupling axis was suppressed by the synergistic effect of the co-doping of Ti and Mo.