The control of thermal expansion and impedance of Al–Zr2(WO4)(PO4)2 nano-cermets for near-zero-strain Al alloy and fine electrical components
The control of thermal expansion and impedance of Al–Zr2(WO4)(PO4)2 nano-cermets for near-zero-strain Al alloy and fine electrical components
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DOI：
10.1016/j.jallcom.2012.11.010
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发表时间：
2013-03
影响因子：
6.2
通讯作者：
Xiansheng Liu;Fuxing Cheng;Junqiao Wang;Wenbo Song;Baohe Yuan;E. Liang
中科院分区：
文献类型：
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作者：
Xiansheng Liu;Fuxing Cheng;Junqiao Wang;Wenbo Song;Baohe Yuan;E. Liang
Al是一种重要的工业材料，具有较大的正热膨胀系数（CTE），而Zr 2（WO 4）（PO 4）2（ZWP）是一种负热膨胀材料。在ZWP不分解的情况下，成功地合成了热膨胀系数和阻抗系数可控的Al-ZWP金属陶瓷/合金。SEM图像和元素分布表明，金属陶瓷由相对均匀的纳米颗粒组成，尺寸约为100 nm，Al和ZWP在金属陶瓷中均匀分散。金属陶瓷的热膨胀系数可以很好地控制在负值（−2.74×10− 6 K −1）到大正值（<$25.68 ×10− 6 K −1）之间。的金属陶瓷的电响应进行了研究，并揭示了电容器和/或电阻器样的行为，取决于Al：ZWP的质量比。研究结果为Al-ZWP金属陶瓷/合金在近零应变铝合金中作为建筑材料和精密电子元器件的广泛应用奠定了基础。
Al is an important industry material with large positive coefficient of thermal expansion (CTE) while Zr2(WO4)(PO4)2(ZWP) is one of negative thermal expansion materials. Al–ZWP cermets/alloys with controllable coefficients of thermal expansion and impedance are successively synthesized without decomposition of ZWP. SEM imaging and elemental mapping show that the cermets comprise relatively uniform nanoparticles with sizes around 100nm and that the Al and ZWP in the cermets are homogeneously dispersed. The CTEs of the cermets can be well controlled from negative (−2.74×10−6K−1) to large positive (∼25.68×10−6K−1). The electric response of the cermets is studied and a capacitor- and/or resistor-like behavior are revealed, depending on the Al:ZWP mass ratio. The results may pave the way toward broad applications of Al–ZWP cermets/alloys in near-zero-strain Al alloy as construction materials and fine electrical components.