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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">能实现废弃热能回收的新型红外线发射装置 </h1> <p class="xg1"> 时间：2017-4-17 11:02<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(918)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=5605&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>一种新的可重新配置的装置，它能够以完全可控的方式发射热红外光，有望有一天可以在红外线波长上收集废弃的热能，并将其转化为可用能量。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 一种新的可重新配置的装置，它能够以完全可控的方式发射热红外光，有望有一天可以在红外线波长上收集废弃的热能，并将其转化为可用能量。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201704/17/110059uccfwhkchl4hss01.jpg" target="_blank"><img src="data/attachment/portal/201704/17/110059uccfwhkchl4hss01.jpg"></a></p></div><div><br></div><div> <font color="#f00000"><b>新的技术可以用来提高热光系统的效率，这是一种特殊类型的<a href="http://solar.oecr.com" target="_blank" class="relatedlink">太阳能</a>电池，可使用红外线或热能，而不是传统的太阳能电池吸收的可见光。</b></font>科学家们一直致力于创造热光系统，能够有效地在炎热地区捕获发现的热能并可用于足够的实践应用，如用在玻璃工业上窑炉中。它们也可以用来将来自汽车发动机的热能转化为能量，从而为汽车电池循环充电。</div><div><br></div><div> “由于红外线的发散能量或强度是可控的，这种新的红外发射器可以提供量身定制的方式来收集和使用热能，”北卡罗莱纳州杜克大学的Willie J. Padilla说。“我们对于如何利用废热有很大的兴趣，我们的技术也有望可以改善这个过程。”</div><div><br></div><div> <b><font color="#f00000">新设备是基于超<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>，是一种合成材料，表现出很特殊的性能，这种性能是天然材料所不具备的。</font></b>Padilla和博士生Xinyu Liu用一种超材料设计，以极高的效率吸收和发射红外波长。通过将其与微<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机电</a>系统（MEMS）所提供的<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>控制运动相结合，研究人员创建了第一个具有红外发射特性的超材料器件，可以在像素级的基础上快速改变。</div><div><br></div><div> 在美国光学学会期刊的一个高影响的研究期刊《光学》杂志上，发表了一篇研究报告，报告中描述了这种新的红外发射装置，由一个8×8阵列组成可单独控制每个像素，尺寸为120 x 120微米。他们展示了MEMS超材料设备，病创建了一个可通过红外相机进行观察的“D”形字母。</div><div><br></div><div> 研究人员报告说，他们的红外发射器可以达到一系列的红外强度，可以<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>模式的速度高达110千赫，或每秒超过100000次。这种技术可以进行相应拓展，可以让它被用来创建对抗状态中的动态红外模式下的模式分别。</div><div><br></div><div> 与通常用于实现可变的红外发射的方法相反，新的技术可发射可调谐的红外能量，而没有任何变化的温度。由于该材料既不加热，也不冷却，该设备可以在室温下使用，而其他方法需要高的工作温度。虽然利用天然材料的实验已经在室温下实验成功，但那些仅限于窄的红外光谱范围。</div><div><br></div><div> “除了能够实现室温下的操作，使用超材料使得它简单的规模可应用在整个红外波长范围内，并进入可见或较低的频率，” Padilla说。这是因为该设备的属性是由几何实现的，而不是由我们正在使用的组成材料的化学性质实现。”</div><div><br></div><div> 新的可重构的红外发射器是由图案化金属超材料和底部金属层保持静止的可动顶部层组成。当两个层接触时，该装置吸收红外线光子并实现效率很高的发射效率，但当两层分开时发射的红外线能量会变少。施加的电压控制的顶部层的运动，和所发射的红外能量的量取决于施加的确切电压。</div><div><br></div><div> <b><font color="#f00000">动态红外线</font></b></div><div><br></div><div> 使用红外相机，研究人员表明，他们可以动态修改的红外光子的数量从MEMS超材料表面，其强度范围相当于一个温度近20摄氏度的变化。</div><div><br></div><div> 研究人员说，他们可以修改顶部层所使用的超材料图案，创建不同颜色的红外像素，每个像素都可以在强度上进行调整。这可能允许创建类似于电视中使用的RGB像素的红外像素。他们现在正在努力扩大技术，通过制造更多的多达128×128像素的设备，并增加单个像素的大小。</div><div><br></div><div> “原则上，利用类似于我们的方法可以用来创建多种这种可重构材料的动态效应，”帕迪拉说。“这可以用来实现动态红外光学斗篷或在红外线环境下的负折射率。”</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201704/17/110216cdxbdddirtdbdwn4.jpg" target="_blank"><img 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