Adhesive joint type perovskite manganese oxide material

Abstract

The invention provides an adhesive perovskite manganese oxide material. The adhesive perovskite manganese oxide material is prepared by adopting the following method: preparing precursor powder: La2O3, CaCO3 or SrCO3 or Pr6O11 or Co2O3, MnO2 are mixed according to the atomic ratio of La1-xMxMnO3, thereinto, La<1-x>MxMnO3, x is more than 0 but less than 1 and M is either Sr, Ca, Pr or Co; after the raw materials are milled, the milled materials are calcined at the temperature of 1100 to 1300 DEG C for 5 to 20 hours twice to three times before the calcined materials are milled again; b. packaging a coupling agent: the coupling agent of 0.5 to 1.5 percent of the precursor powder by weight is added to the precursor powder and is beaten uniformly; c. adhesion: an adhesive agent of 1 to 6 percent of the precursor powder by weight and a curing agent corresponding to the adhesive agent are dissolved in acetone; subsequently, the precursor powder in the step b is added; the mixture is mixed uniformly and baked before the mixture is pressed under the pressure of 10 to 800MPa. The adhesive perovskite manganese oxide material has good mechanical property and is tough to some extent, which is unbreakable. The adhesive perovskite manganese oxide material can be manufactured into components of various complicated shapes.

Description

technical field [0001] The invention relates to a bonded perovskite manganese oxide material. Background technique [0002] Perovskite manganese oxide (La 1-x m x MnO 3 , M is Sr, Ca, Pr, Co, etc.) materials are a class of functional materials with a wide range of uses. Because their resistance can be significantly changed under the action of an external magnetic field, they have great potential in magnetic recording, high-sensitivity detectors, sensors, and optical switches. Good application prospects. It can also be used as solid oxide fuel cell materials, magnetic refrigeration materials, conductive ceramic materials, oxygen separation membranes and gas sensitive materials, etc. [0003] Existing perovskite manganese oxide materials are usually prepared by high-temperature sintering method: that is, the precursor powder is first prepared by solid-state reaction method or sol-gel method, and then the sintered type is obtained after high-temperature sintering according ...

AI Technical Summary

Problems solved by technology

The sintered perovskite manganese oxide material prepared by this method has the characteristics of ordinary ceramic materials: poor mechanical properties, strong brittleness, brittleness, and difficulty in reprocessing

However, this sintering method usually needs to be sintered at a high temperature above 1200°C for 2 to 20 hours. The temperature is high, the time is long, the energy consumption is large, and the preparation cost is high.

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