In this work, the quaternary nanostructure La_0.8−xCe_xAg_0.2MnO₃ perovskite was synthetized by conventional solid-state method and calcination in air at 900 °C for 24 h. These materials are one member of perovskite-containing manganite, and rare earths and Alkali elements in A and B sites, respectively. The effect of La substitution on the crystallite size and microstrain of the X-ray diffraction (XRD) line broadening is analyzed in different methods. Scanning electron microscope measurements are combined with an energy dispersive X-ray analyzer (EDX) to illustrate the effect of cerium (Ce) atoms adding. Scherrer, Williamson–Hall and size-strain plot methods were used to analyze the line profile of XRD and Rietveld refinement by Fullprof software to determine microstructure parameters of perovskite. The results obtained showed that with the addition of the Ce element, there is no effect on the lattice parameters, which supports the replacement of Ce ions with those of La ion in the unit cell. In addition, the crystal size microstrain and porosity values were systematically decreased with increasing Ce-ion concentrations. The analysis of the surface morphology shows that the process leads to the formation of smaller nanoparticles with two distinguishable size ranges, supporting porosity decrease. These nanoparticles were attributed to pure La_0.8−xCe_xAg_0.2MnO₃ and the other phases resulting from the interaction of Ce ions. EDX results also indicate that Ce ions have been successfully replaced in La_0.8−xCe_xAg_0.2MnO₃. Correlation of different results let to conclude that the resulting product can be applied in the future in field of magnetic refrigeration.

在这项工作中，四级纳米结构La _{0.8− x} Ce _x Ag _0.2 MnO ₃通过常规的固态方法合成钙钛矿，并在空气中在900°C下煅烧24 h。这些材料是含钙钛矿的锰的一种，分别是A和B位置的稀土元素和碱元素。用不同的方法分析了La取代对X射线衍射（XRD）线展宽的微晶尺寸和微应变的影响。扫描电子显微镜测量与能量色散X射线分析仪（EDX）结合使用，以说明铈（Ce）原子添加的影响。Scherrer，Williamson-Hall和尺寸应变图方法通过Fullprof软件用于分析XRD和Rietveld精炼的线轮廓，从而确定钙钛矿的微观结构参数。获得的结果表明，添加Ce元素后，对晶格参数没有影响，它支持在晶胞中用Ce离子替换Ce离子。另外，随着Ce离子浓度的增加，晶体尺寸的微应变和孔隙率值被系统地减小。对表面形态的分析表明，该过程导致形成具有两个可区分大小范围的较小纳米颗粒，从而降低了孔隙率。这些纳米颗粒归因于纯La 支持孔隙率降低。这些纳米颗粒归因于纯La 支持孔隙率降低。这些纳米颗粒归因于纯La_{0.8− x} Ce _x Ag _0.2 MnO ₃和其他相是由于Ce离子的相互作用而产生的。EDX结果还表明Ce离子已成功地被La _{0.8− x} Ce _x Ag _0.2 MnO ₃取代。不同结果的相关性可以得出结论，最终产品可以在将来应用于电磁制冷领域。