Fuel Effect on the Structural, Morphological, and Electrical Properties of Perovskite-Type Mixed Oxide La0.7Ca0.3Mn1–xNixO3 (x = 0 and 0.07) Synthesized through Gel Combustion

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
S. L. Amaya Bustos, A. Gómez Zapata, J. D. Ortega Mesa, O. Morán, E. Chavarriaga
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引用次数: 0

Abstract

The solution combustion synthesis method was used to prepare samples with stoichiometric La0.7Ca0.3Mn1–xNixO3 (x = 0 and 0.07) using glycine and tris(hydroxymethyl)aminomethane (TRIS) as fuels. X-ray diffraction showed that the samples crystallized into an orthorhombic structure of the Pnma space group with slight changes in the lattice parameters according to the type of fuel used, which can be attributed to their heat capacity. Likewise, using the transmission electron microscope technique, conglomerates of particles with relatively uniform morphology and crystallite sizes that varied in a range of 17–26 nm were observed. The electrical behavior exhibited a metal–semiconductor transition that displaced the temperature peak towards lower values, according to the Ni content. It was concluded that the properties of this type of complex inorganic oxide such as manganites can be varied with the use of different fuels in the synthesis process.

燃料对凝胶燃烧合成钙钛矿型混合氧化物La0.7Ca0.3Mn1-xNixO3 (x = 0和0.07)结构、形态和电学性能的影响
采用溶液燃烧合成法,以甘氨酸和三(羟甲基)氨基甲烷(tris)为燃料,制备了化学计量量为La0.7Ca0.3Mn1-xNixO3 (x = 0和0.07)的样品。x射线衍射结果表明,样品结晶成Pnma空间群的正交结构,晶格参数根据燃料类型略有变化,这可归因于它们的热容量。同样,使用透射电子显微镜技术,观察到颗粒的形态相对均匀,晶粒尺寸在17-26 nm范围内变化。根据Ni含量,电学行为表现出金属-半导体转变,使温度峰值向较低的值偏移。结果表明,在合成过程中使用不同的燃料,锰酸盐等复合无机氧化物的性能会发生变化。
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来源期刊
CiteScore
1.00
自引率
33.30%
发文量
27
期刊介绍: International Journal of Self-Propagating High-Temperature Synthesis  is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.
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