Effect of Heat Accumulation on Femtosecond Laser Reductive Sintering of Mixed CuO/NiO Nanoparticles.

Effect of Heat Accumulation on Femtosecond Laser Reductive Sintering of Mixed CuO/NiO Nanoparticles.
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DOI:
10.3390/mi9060264
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发表时间:
2018-05-28
期刊:
影响因子:
3.4
通讯作者:
Hata S
Hata S
中科院分区:
工程技术3区
文献类型:
--
作者:
Mizoshiri M;Nishitani K;Hata S

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直接激光写入技术因其在二维和三维打印技术中的应用而引起人们的关注。在本文中,我们报告了一种使用飞秒激光还原烧结混合 CuO/NiO 纳米颗粒的微图案化工艺。改变写入速度、激光注量和入射总能量,以研究热量积累对这些材料形成的微图案的影响。激光照射过程的热量积累和热历史显着影响所制造的微图案的材料成分和热电性能。短激光照射持续时间和高激光能量密度减少了微图案中金属氧化物的量。事实证明,通过控制写入速度和总辐射能量来控制还原和再氧化反应,可以选择性制造 p 型和 n 型热电微图案。
Direct laser-writing techniques have attracted attention for their use in two- and three-dimensional printing technologies. In this article, we report on a micropatterning process that uses femtosecond laser reductive sintering of mixed CuO/NiO nanoparticles. The writing speed, laser fluence, and incident total energy were varied to investigate the influence of heat accumulation on the micropatterns formed by these materials. Heat accumulation and the thermal history of the laser irradiation process significantly affected the material composition and the thermoelectric properties of the fabricated micropatterns. Short laser irradiation durations and high laser fluences decrease the amount of metal oxide in the micropatterns. Selective fabrication of p-type and n-type thermoelectric micropatterns was demonstrated to be possible with control of the reduction and reoxidization reactions through the control of writing speed and total irradiation energy.
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