Adhesive joint type perovskite manganese oxide material

A manganese oxide and perovskite technology, applied in the field of adhesive perovskite manganese oxide materials, can solve the problems of high preparation cost, poor mechanical properties, difficult reprocessing, etc., and achieves low preparation cost, improved toughness, Good product consistency

Inactive Publication Date: 2009-01-07
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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
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Method used

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  • Adhesive joint type perovskite manganese oxide material
  • Adhesive joint type perovskite manganese oxide material
  • Adhesive joint type perovskite manganese oxide material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A kind of embodiment of the present invention is, a kind of bonding type perovskite manganese oxide material is obtained by the following method:

[0022] a, preparation of precursor powder will La 2 o 3 , SrCO 3 , MnO 2 According to the molecular formula La 1-x m x MnO 3 X = 0.3 atomic ratio ingredients, wherein M is Sr, after grinding the prepared raw materials, calcination and grinding after calcination are carried out 3 times, each time the calcination temperature is 1200 ° C for 10 hours, to obtain La 0.7 Sr 0.3 MnO 3 Precursor powder.

[0023] b. Coupling agent coating Fully mix the precursor powder in step a with 1% silane coupling agent by weight of the precursor powder, and stir evenly.

[0024] c. Bonding Dissolve the epoxy resin adhesive with 1% weight of the precursor powder and the curing agent matched with the epoxy resin adhesive in sequence in the acetone solution, and then add the coupling agent coated in step b. Precursor powder, mixed evenl...

Embodiment 2

[0027] A bonding type perovskite manganese oxide material is obtained by the following method:

[0028] a. Preparation of precursor powder: La 2 o 3 , CaCO 3 , MnO 2 According to the molecular formula La 1-x m x MnO 3 The atomic ratio of X=0.3 is equipped with raw materials, wherein M is Ca. After grinding the prepared raw materials, 3 times of calcination and grinding after calcination, the calcination temperature of each time is 1200 ° C for 10 hours, to obtain La 0.7 Ca 0.3 MnO 3 Precursor powder.

[0029] b. Coupling agent coating Fully mix the precursor powder in step a with 1% silane coupling agent by weight of the precursor powder, and stir evenly.

[0030] c. Bonding Dissolve the epoxy resin adhesive with 3% precursor powder weight and the curing agent matched with the epoxy resin adhesive in sequence in the acetone solution, and then add the b-step coupling agent coated Precursor powder, mixed evenly, dried at 150°C, and pressed under a pressure of 50Mpa. ...

Embodiment 3

[0033] A bonding type perovskite manganese oxide material is obtained by the following method:

[0034] a. Preparation of precursor powder: La 2 o 3 、Co 2 o 3 , MnO 2 According to the molecular formula La 1-x m x MnO 3 The atomic ratio of X=0.9 is equipped with raw materials, wherein M is Co. After grinding the prepared raw materials, the prepared raw materials are ground, and then calcination and grinding after calcination are carried out twice. The calcination temperature of each time is 1100°C. 5 hours, that is La 0.1 co 0.9 MnO 3 Precursor powder.

[0035] b. Precursor powder coated with coupling agent Fully mix the precursor powder in step a with 0.5% silane coupling agent by weight of the precursor powder, and stir evenly.

[0036] c. Bonding of precursor powder Dissolve the epoxy resin adhesive of 6% precursor powder weight and the curing agent matched with the epoxy resin adhesive in sequence in the acetone solution, and then add the coupling agent package ...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): C04B35/628C04B35/634
Inventor 羊新胜赵勇杨立芹吕莉
Owner SOUTHWEST JIAOTONG UNIV
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