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Preparation method of SmFeO3 ceramic

A technology of ceramics and ferrite, which is applied in the field of preparation of samarium ferrite ceramics, and achieves the effects of significant reduction in grain size, easy promotion, and large surface area

Inactive Publication Date: 2019-03-08
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention successfully solves the problem of grain control of perovskite structure ferromagnetism electroceramic samarium ferrite

Method used

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  • Preparation method of SmFeO3 ceramic
  • Preparation method of SmFeO3 ceramic
  • Preparation method of SmFeO3 ceramic

Examples

Experimental program
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Embodiment 1

[0027] According to the formula chemical formula is SmFeO 3 Weigh raw materials, molecular weight 254.25, batching quality 50.00 grams; weigh required raw materials Fe 2 o 3 Mass is 15.734 grams, Sm 2 o 3 The mass is 34.324 grams.

[0028] The preparation method is:

[0029] Weigh Fe according to stoichiometric ratio 2 o 3 、Sm 2 o 3 After each powder raw material is placed in a ball mill jar, add an appropriate amount of distilled water as a solvent, and after planetary ball milling for 16 hours, dry it in a drying oven at a temperature of 100°C for 24 hours, and crush it through an 80-mesh sieve to obtain a mixed powder of the raw material;

[0030] Pre-synthesize the mixed powder precursor at 900°C for 6 hours at low temperature for a long time;

[0031] To the synthesized precursor powder, add PVA binder with a concentration of 5wt% accounting for 15wt% of the powder material, mix and pre-press, crush and grind through an 80-mesh sieve to granulate, tablet at 440MP...

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Abstract

The invention relates to a preparation method of SmFeO3, and belongs to the field of weak ferromagnetic ceramic crystalline grain regulation and control. The chemical formula of the SmFeO3 ceramic isSmFeO3 (SF for short). Ball grinding is used for preparing mixed raw material powder; a mixed precursor is prepared by a proper process; the weak ferromagnetic ceramic with uniform micron-sized crystalline grains is prepared by a proper method and a solid phase reaction method through process regulation and control; the crystalline grain size is reduced, but the weak ferromagnetism of the ceramicis not greatly reduced. A high demonstration effect is achieved in the crystalline grain regulation and control field; bright prospects are realized; meanwhile, the SmFeO3 ceramic prepared by the process method in an energy saving mode has application prospects in the aspects of electronic devices such as some novel sensors, self-rotation devices and information random memories.

Description

technical field [0001] The invention relates to a preparation method of samarium ferrite ceramics with micron grain morphology, which belongs to the field of grain control of weak ferromagnetic ceramics. Background technique [0002] According to relevant literature research, passive components and active devices (semiconductor products such as new sensors, spin devices and information random storage, integrated circuits) together constitute the core part of the circuit and are the basis of various electronic information products. In new electronic products, integrated circuits and passive components account for 46.1% and 9.1% of the total production cost of all electronic components and parts, but account for 12.7% and 55.1% of the total installation cost, and even some chips The management and installation costs of the traditional components have exceeded their price. It is not difficult to see that passive electronic components have become a bottleneck restricting the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/50C04B35/622
CPCC04B35/2675C04B35/50C04B35/622
Inventor 李正法
Owner CHINA JILIANG UNIV
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