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TRANSPORT PROPERTIES OF La_(0.67)Sr_(0.33)MnO_(3-δ) POWDER BY SPARK PLASMA SINTERING

Liwen Lei, Fu Zhengyi, Zhang Jin-yong, Yucheng Wang

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Abstract

The powder of was synthesized by self-propagating high-temperature synthesis (SHS).The influences of the sintering temperature of spark plasma sintering(SPS) on the microstructure and the transport properties of the powder are discussed.The results of scanning electron microscope and the density test show that the sample produced by SPS has high density and a uniform grain size.The transition temperature of the metalinsulator decreases with the increase of the sintering temperature due to the deficiency of oxygen.Compared to the conventional sintering,the elevated colossal magnetoresistance between grains can be attributed to the high density of the sample by SPS.

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What this paper is about

The powder of was synthesized by self-propagating high-temperature synthesis (SHS).The influences of the sintering temperature of spark plasma sintering(SPS) on the microstructure and the transport properties of the powder are discussed.The results of scanning electron microscope and the density test show that the sample produced by SPS has high density and a uniform grain size.The transition temperature of the metalinsulator decreases with the increase of the sintering temperature due to the deficiency of oxygen.Compared to the conventional sintering,the elevated colossal magnetoresistance between grains can be attributed to the high density of the sample by SPS.

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Available abstract

The powder of was synthesized by self-propagating high-temperature synthesis (SHS).The influences of the sintering temperature of spark plasma sintering(SPS) on the microstructure and the transport properties of the powder are discussed.The results of scanning electron microscope and the density test show that the sample produced by SPS has high density and a uniform grain size.The transition temperature of the metalinsulator decreases with the increase of the sintering temperature due to the deficiency of oxygen.Compared to the conventional sintering,the elevated colossal magnetoresistance between grains can be attributed to the high density of the sample by SPS.

Key concepts: Spark plasma sintering, Materials science, Sintering, Microstructure, Scanning electron microscope, Grain size, Relative density, Composite material

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TRANSPORT PROPERTIES OF La_(0.67)Sr_(0.33)MnO_(3-δ) POWDER BY SPARK PLASMA SINTERING — Research Paper | ScholarLens