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首页> 外文期刊>Journal of Materials Processing Technology >Characteristics of nano-sized La_(0.7)Ca_(0.3)MnO_3 powders prepared by solution combustion method and solid state reaction method for CMR applications
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Characteristics of nano-sized La_(0.7)Ca_(0.3)MnO_3 powders prepared by solution combustion method and solid state reaction method for CMR applications

机译：固溶燃烧法和固相反应法制备的纳米La_（0.7）Ca_（0.3）MnO_3粉体的特征

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摘要

La_(0.7)Ca_(0.3)MnO_3 powders were prepared by both solution combustion method (SCM) and solid state reaction method (SSRM) and they were calcined at various calcination temperatures and time intervals in the air. In the SSRM, single phase La_(0.7)Ca_(0.3)MnO_3was obtained after heat-treatment of the powder at 1000 =C for 24h. However, in the SCM, single phase nano-sized La_(0.7)Ca_(0.3)MnO_3 powder could be obtained easily when the powder was heat-treated at 650 deg C for 1 h only. Specific surface area of the polycrystalline La_(0.7)Ca_(0.3)MnO_3 powder, using this method (SCM), was measured to be 92 m/g. The specific surface area was about 26-fold larger than that of the SSRM powder.
机译：通过固溶燃烧法（SCM）和固相反应法（SSRM）制备La_（0.7）Ca_（0.3）MnO_3粉末，并在不同的煅烧温度和时间间隔下在空气中煅烧。在SSRM中，将粉末在1000℃下热处理24小时后，获得单相La_（0.7）Ca_（0.3）MnO_3。然而，在SCM中，仅将粉末在650℃下热处理1小时可以容易地获得单相纳米尺寸的La_（0.7）Ca_（0.3）MnO_3粉末。使用该方法（SCM），测得多晶La_（0.7）Ca_（0.3）MnO_3粉末的比表面积为92m / g。比表面积是SSRM粉末的约26倍。

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