Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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La1-xBixFeO3 rare earth ferrite magnetic material and preparation method thereof
The invention discloses a La1-xBixFeO3 rare earth ferrite magnetic material and a preparation method thereof. The method comprises the steps: (1), raw materials including bismuth nitrate, ferric nitrate and lanthanum nitrate are weighed according to the stoichiometric ratio, blended and dissolved in dilute nitric acid; (2) citric acid is added into the metal ion solution, the pH value is adjustedto 5-8, and ethylene glycol is added; (3) the solution is stirred at 60-80 DEG C until the solution is uniform and is in a transparent wet gel state; (4) the wet gel is dried at the temperature of 80-100 DEG C, and presintering at the temperature of 400-500 DEG C is conducted to obtain precursor powder; (5) polyvinyl alcohol glue is added into the precursor powder, and grinding and granulating, and pressing and forming are conducted; and (6) the sample is presintered at 400-500 DEG C, and annealed at 600-1300 DEG C to obtain the rare earth ferrite magnetic material. The rare earth ferrite magnetic material with a distorted crystal structure is obtained through Bi doping, and the coercive force and the residual magnetism of the material are improved.
本发明公开了一种LaBiFeO稀土铁氧体磁性材料及其制备方法，该方法包含：(1)将原料硝酸铋、硝酸铁和硝酸镧按化学计量比称样配料，溶入稀硝酸中；(2)在金属离子溶液中加入柠檬酸，调节pH为5～8，加入乙二醇；(3)将溶液于60～80℃中搅拌直至溶液均匀，呈透明湿凝胶状；(4)将湿凝胶于80～100℃干燥，400～500℃预烧，得到前驱体粉末；(5)在前驱体粉末加入聚乙烯醇胶水，研磨造粒，压制成形；(6)将样品于400～500℃预烧，在600～1300℃退火，得到稀土铁氧体磁性材料。本发明的磁性材料通过Bi掺杂得到晶体结构畸变的稀土铁氧体磁性材料，提高了材料的矫顽力和剩磁。
La1-xBixFeO3 rare earth ferrite magnetic material and preparation method thereof
The invention discloses a La1-xBixFeO3 rare earth ferrite magnetic material and a preparation method thereof. The method comprises the steps: (1), raw materials including bismuth nitrate, ferric nitrate and lanthanum nitrate are weighed according to the stoichiometric ratio, blended and dissolved in dilute nitric acid; (2) citric acid is added into the metal ion solution, the pH value is adjustedto 5-8, and ethylene glycol is added; (3) the solution is stirred at 60-80 DEG C until the solution is uniform and is in a transparent wet gel state; (4) the wet gel is dried at the temperature of 80-100 DEG C, and presintering at the temperature of 400-500 DEG C is conducted to obtain precursor powder; (5) polyvinyl alcohol glue is added into the precursor powder, and grinding and granulating, and pressing and forming are conducted; and (6) the sample is presintered at 400-500 DEG C, and annealed at 600-1300 DEG C to obtain the rare earth ferrite magnetic material. The rare earth ferrite magnetic material with a distorted crystal structure is obtained through Bi doping, and the coercive force and the residual magnetism of the material are improved.
本发明公开了一种LaBiFeO稀土铁氧体磁性材料及其制备方法，该方法包含：(1)将原料硝酸铋、硝酸铁和硝酸镧按化学计量比称样配料，溶入稀硝酸中；(2)在金属离子溶液中加入柠檬酸，调节pH为5～8，加入乙二醇；(3)将溶液于60～80℃中搅拌直至溶液均匀，呈透明湿凝胶状；(4)将湿凝胶于80～100℃干燥，400～500℃预烧，得到前驱体粉末；(5)在前驱体粉末加入聚乙烯醇胶水，研磨造粒，压制成形；(6)将样品于400～500℃预烧，在600～1300℃退火，得到稀土铁氧体磁性材料。本发明的磁性材料通过Bi掺杂得到晶体结构畸变的稀土铁氧体磁性材料，提高了材料的矫顽力和剩磁。
La1-xBixFeO3 rare earth ferrite magnetic material and preparation method thereof
一种LaBiFeO稀土铁氧体磁性材料及其制备方法
YAO QINGRONG (Autor:in) / RAO GUANGHUI (Autor:in) / TIAN CHUANG (Autor:in) / WANG JIANG (Autor:in) / ZHOU HUAIYING (Autor:in)
26.05.2020
Patent
Elektronische Ressource
Chinesisch
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