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High thermal radiation of Ca-doped lanthanum chromite

机译：Ca掺杂镧系元素的高热辐射

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摘要

Calcium-doped lanthanum chromite, La1-xCaxCrO3, was prepared using a solid-state reaction method, and the effect of varying the Ca content (0 <= x <= 0.5) was investigated in relation to its crystalline structure, surface morphology, solar absorption and thermal radiation. This found that the crystalline structure is slightly distorted by Ca2+ doping, with an accompanying increase in the valence state of Cr ions and oxygen vacancies enhancing both the solar absorption and thermal emittance. Overall, the La1-xCaxCrO3 system displays relatively high thermal radiation properties, with an optimal composition of La0.5Ca0.5CrO3 exhibiting a solar absorption of 95% and a thermal emittance of 0.94. When used as a light absorber coupled to a thermoelectric module this proved capable of generating electricity and hot water, thereby demonstrating the suitability of this energy-saving material for use in solar thermal radiation applications.
机译：使用固态反应方法制备钙掺杂的镧铬铁矿La1-Xcaxcro3，并研究了与其晶体结构，表面形态，太阳能的效果（0 <= x <= 0.5）的效果。 吸收和热辐射。 这发现结晶结构略微被Ca2 +掺杂略微扭曲，并且随附的Cr离子的价态和氧空位的增强增强太阳能吸收和热膨胀率。 总的来说，LA1-XcaxCro3系统显示出相对高的热辐射性能，具有La0.5ca0.5的最佳组成，表现出95％的太阳能吸收和0.94的热发射率。 当用作耦合到热电模块的光吸收器，这被证明能够产生电力和热水，从而证明了这种节能材料在太阳能热辐射应用中使用的适用性。

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  • 来源
    《RSC Advances》 |2015年第39期|共8页
  • 作者

    Lu Yi; Fang Zhenggang; Lu Chunhua; Wei Ling; Ni Yaru; Xu Zhongzi; Tao Shunyan;

  • 作者单位

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn State Key Lab Mat Orient Chem Engn Nanjing 210009 Jiangsu Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat Shanghai 200050 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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