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Novel ferrite ceramic material and preparation method thereof
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A technology of ceramic materials and ferrite, which is applied in the field of new ferrite ceramic materials and its preparation, can solve the problems of large ionic conductivity and achieve the effect of large ionic conductivity
Inactive Publication Date: 2019-09-17
BEIJING INFORMATION SCI & TECH UNIV
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Abstract
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Problems solved by technology
[0004] The present invention adopts solid state method to prepare a kind of novel layered oxygen vacancy ferrite ceramic material Sr 2 Fe 8 o 18 , whose Sr:Fe is 1:4, has the characteristics of layered oxygen vacancy structure, and has a large ionic conductivity, and there are no related reports at home and abroad.
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Embodiment 1
[0017] The present invention adopts chemical raw material SrCO with a purity greater than 99.9% 3 , Fe 2 o 3 Preparation of Sr 2 Fe 8 o 18 Ferrite ceramic material.
[0018] The specific implementation plan is as follows:
[0019] 1) SrCO 3 , Fe 2 o 3 Weigh the ingredients according to the Zn:Fe molar ratio of 1:4, mix the raw materials into a nylon tank, and ball mill for 21 hours; put the ball milled raw materials in an infrared drying oven to dry and sieve;
[0020] 2) Use a powder tablet press to press into a cylinder of Φ10mm×5mm at a pressure of 4MPa;
[0021] 3) Sinter the cylinder at 1180°C for 2 hours to obtain Sr 2 Fe 8 o 18 Ferrite ceramic material.
Embodiment 2
[0023] The present invention adopts chemical raw material SrCO with a purity greater than 99.9% 3 , Fe 2 o 3 Preparation of Sr 2 Fe 8 o 18 Ferrite ceramic material.
[0024] The specific implementation plan is as follows:
[0025] 1) SrCO 3 , Fe 2 o 3 Weigh the ingredients according to the Zn:Fe molar ratio of 1:4, mix the raw materials into a nylon tank, and ball mill for 24 hours; put the ball milled raw materials in an infrared drying oven to dry and sieve;
[0026] 2) Use a powder tablet press to press into a cylinder of Φ12mm×1mm at a pressure of 8MPa;
[0027] 3) Sinter the cylinder at 1180°C for 2 hours to obtain Sr 2 Fe 8 o 18 Ferrite ceramic material.
Embodiment 3
[0029] The present invention adopts chemical raw material SrCO with a purity greater than 99.9% 3 , Fe 2 o 3 Preparation of Sr 2 Fe 8 o 18 Ferrite ceramic material.
[0030] The specific implementation plan is as follows:
[0031] 1) SrCO 3 , Fe 2 o 3 Weigh the ingredients according to the Zn:Fe molar ratio of 1:4, mix the raw materials into a nylon tank, and ball mill for 24 hours; put the ball milled raw materials in an infrared drying oven to dry and sieve;
[0032] 2) Use a powder tablet press to press into a cylinder of Φ10mm×5mm at a pressure of 2MPa;
[0033] 3) Sinter the cylinder at 1200°C for 2 hours to obtain Sr 2 Fe 8 o 18 Ferrite ceramic material.
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Abstract
The invention discloses a novel ferrite ceramic material, which has the chemical formula of Sr2Fe8O18. The preparation method of the novel ferrite ceramic material comprises the following preparation steps: 1) weighing and proportioning the chemical raw materials SrCO3 and Fe2O3 whose purity is more than 99.9% according to the chemical formula Sr2Fe8O18; 2) mixing the prepared chemical raw materials, putting them into a ball milling pot, adding agate balls and deionized water, ball milling, drying the ball milled raw materials in an infrareddrying oven, and sieving; 3) drying that sieved power and pressing the powder into a circular disc by a powder pressing machine; 4) sintering the circular disc at 1180-1240 DEG C for 2-6 hours to obtain a novel ferrite ceramic material. The material prepared by the invention has the layered oxygen vacancy structure characteristic and excellent ionic conductivity.
Description
technical field [0001] The invention relates to the technical field of electronic information materials and components, and more specifically relates to a novel ferrite ceramic material and a preparation method thereof. Background technique [0002] Layered oxygen-vacancy ferrites hold promising applications in photocatalysis, solid-state batteries, storage devices, and magnetism. Due to the special crystal structure, a lot of research has focused on the characterization of its oxygen vacancy crystal structure. The general chemical formula of layered oxygen vacancy ferrite is: AFe x o y , where the A-site cations are mostly divalent metals. Fe usually forms FeO according to the structure 6 , FeO 5 or FeO 4 polyhedra, and the A-site cations exist between the polyhedra. Variations in the ratio of A-site cations to Fe ions in layered oxygen-vacancy ferrites can alter the crystal structure and lead to significant differences in electrical properties, making them potential...
Claims
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Application Information
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