کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594965 | 1515685 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pressure dependence of negative thermal expansion in Zr2(WO4)(PO4)2 Pressure dependence of negative thermal expansion in Zr2(WO4)(PO4)2](/preview/png/1594965.png)
Negative thermal expansion materials can experience significant stresses when they are used in composites. Under ambient conditions Zr2(WO4)(PO4)2 displays anisotropic negative thermal expansion (NTE) (αv=−14.0(10)×10−6K−1, αa=−7.9(5)×10−6K−1, αb=2.5(5)×10−6K−1, αc=−8.7(2)×10−6K−1 at 0 GPa). The effect of hydrostatic pressure on its thermal expansion characteristics was investigated by neutron diffraction between 300 and 60 K at pressures up to 0.3 GPa. No phase transitions were observed in the pressure and temperature range examined. The material was found to have a bulk modulus, B0, of 61.3(8) GPa at ambient temperature, and unlike some other NTE materials, pressure had no detectable effect on thermal expansion (αv=−14.2(8)×10−6K−1, αa=−7.9(3)×10−6K−1, αb=2.9(5)×10−6K−1, αc=−9.2(2)×10−6K−1 at 0.3 GPa).
Journal: Solid State Communications - Volume 149, Issues 11–12, March 2009, Pages 421–424