高温高发射率陶瓷材料的制备与研究

发布时间：2018-08-17 09:02

【摘要】：用常规固相反应法成功制备Co/Cr/Ni/Cu/Mn掺杂的La_(0.8)Ca_(0.2)Mn_(0.5)X_(0.5)O_3陶瓷材料,并利用XRD,XPS,FT-IR,IR-2红外发射率测试仪对制得的试样进行了物相性能和红外辐射性能的研究。研究表明:所制备试样的晶体结构均为正交晶系,平均粒径在38~59 nm之间。400和600 cm-1均出现了钙钛矿型复合氧化物的特征振动峰,即所制得试样均形成了稳定的钙钛矿结构。在2.5~5μm波段范围内材料的发射值均在0.7以上,发射率值由大到小的顺序为:MnNiCuCoCr,不同元素掺杂后晶体的畸变程度存在差异,吸附氧与晶格氧的比例发生变化,当然发射率的差异与材料本身带电粒子及运动特性也有关联。实验制得的La_(0.8)Ca_(0.2)Mn_(0.5)X_(0.5)O_3系列粉体材料在2.5~5μm的发射率均在0.74以上,特别是La_(0.8)Ca_(0.2)MnO_3的发射率值达到0.86,可用于高温反应炉中作为炉衬材料降低能量损耗。
[Abstract]:Co/Cr/Ni/Cu/Mn doped La _ (0.8) Ca _ (0.2) mn _ (0.5) X _ (0.5) O _ 3 ceramics were successfully prepared by conventional solid-state reaction method. The phase properties and infrared radiation properties of the samples were studied by using XRDX XPSFT-IR-2 infrared emissivity tester. The results show that the crystal structure of all the samples is orthorhombic, and the characteristic vibrational peaks of perovskite-type composite oxides appear between 3859nm and 600 cm-1, which means that all the samples have stable perovskite structure. In the range of 2.5 渭 m, the emission values of the materials are all above 0.7, and the order of emissivity is in the order of: MnNiCuCoCr. the distortion degree of crystals is different after doping with different elements, and the ratio of adsorbed oxygen to lattice oxygen changes. Of course, the differences in emissivity are also related to the charged particles and motion characteristics of the material itself. The emissivity of La _ (0.8) Ca _ (0.2) mn _ (0.5) X _ (0.5) O _ (3) series powder materials is above 0.74 at 2.5 渭 m, especially the emissivity of La _ (0.8) Ca _ (0.2) MnO_3 is 0.86, which can be used as lining material in high temperature reaction furnace to reduce energy loss.
【作者单位】：江西理工大学冶金与化学工程学院;
【基金】：国家自然科学基金项目(51564019)资助
【分类号】：TQ174.6

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