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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Synthesis, microstructure and phase control of zirconium tungstate with a CO2 laser
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Synthesis, microstructure and phase control of zirconium tungstate with a CO2 laser

机译：钨酸锆的合成，微结构和相控

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摘要

Zirconium tungstate was successfully synthesized by rapid solidification with a CO2 laser. Scanning electron microscope observation shows that nano-threads/rods grew horizontally on the surface region and vertically in the interior. The nano-threads in the interior are composed of densely packed nano-crystallites. Raman spectroscopic study shows that the samples solidified in an orthorhombic structure when the laser scan speed was >= 2mm s(-1). This is explained by a compressive stress induced during the rapid solidification process due to a sudden drop of temperature from the molten pool to the ambient. The possibilities for tuning the strength of the compressive stress and controlling the production of different phases of ZrW2O8 are proposed. It is analysed and confirmed that the compressive stress can be effectively reduced by lowering laser scan speed. ZrW2O8 samples with cubic structure are produced with laser scan speed < 2 mm s(-1).
机译：钨酸锆是通过用CO2激光快速固化成功合成的。扫描电子显微镜观察表明，纳米线/棒在表面区域水平生长，在内部垂直生长。内部的纳米线由密集堆积的纳米微晶组成。拉曼光谱研究表明，当激光扫描速度> = 2mm s（-1）时，样品凝固成正交结构。这是由于在快速凝固过程中由于温度从熔池到周围环境的突然下降而产生的压应力所解释的。提出了调整压应力强度和控制ZrW2O8不同相产生的可能性。分析并确认，可以通过降低激光扫描速度来有效降低压应力。激光扫描速度<2 mm s（-1）产生具有立方结构的ZrW2O8样品。

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