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Preparation method for improving magnetostriction coefficient of cobalt ferrite material and cobalt ferrite product prepared by using method
The invention belongs to the field of magnetostriction materials, and mainly relates to a preparation method for improving the magnetostriction coefficient of a cobalt ferrite material and a cobalt ferrite product prepared by using the method. The process mainly comprises the following steps: raw material powder preparation, pre-sintering, ball milling, dry powder compression molding, green body plastic removal orientation, hot isostatic pressing sintering and magnetic field annealing. The compactness of the cobalt ferrite magnetostrictive material obtained by the preparation process of green body plastic removal orientation and sample magnetic field annealing is greater than 95%; the absolute value of the magnetostriction coefficient in the parallel direction is greater than 280 ppm; and the magnetostrictive excitation field is less than 1200Oe. Compared with a traditional preparation process, the magnetostrictive property of the cobalt ferrite is remarkably improved, and application of the cobalt ferrite in the fields of high-frequency magnetic stress sensors, magnetostrictive ultrasonic transducers, precise instruments and the like is facilitated.
本发明属于磁致伸缩材料领域，主要涉及一种提高钴铁氧体材料磁致伸缩系数的制备方法及使用这种方法制备的钴铁氧体的产品。其工艺步骤主要包括：原料粉体制备、预烧、球磨、干粉压制成型、生坯排塑取向、热等静压烧结、磁场退火。本发明通过生坯排塑取向和样品磁场退火的制备工艺获得的钴铁氧体磁致伸缩材料致密度大于95％；平行方向磁致伸缩系数绝对值大于280ppm；磁致伸缩激励场小于1200Oe。与传统制备工艺相比，本发明使钴铁氧体磁致伸缩性能显著提升，有利于其在高频磁应力传感器、磁致伸缩超声换能器、精密仪器等领域的应用。
Preparation method for improving magnetostriction coefficient of cobalt ferrite material and cobalt ferrite product prepared by using method
The invention belongs to the field of magnetostriction materials, and mainly relates to a preparation method for improving the magnetostriction coefficient of a cobalt ferrite material and a cobalt ferrite product prepared by using the method. The process mainly comprises the following steps: raw material powder preparation, pre-sintering, ball milling, dry powder compression molding, green body plastic removal orientation, hot isostatic pressing sintering and magnetic field annealing. The compactness of the cobalt ferrite magnetostrictive material obtained by the preparation process of green body plastic removal orientation and sample magnetic field annealing is greater than 95%; the absolute value of the magnetostriction coefficient in the parallel direction is greater than 280 ppm; and the magnetostrictive excitation field is less than 1200Oe. Compared with a traditional preparation process, the magnetostrictive property of the cobalt ferrite is remarkably improved, and application of the cobalt ferrite in the fields of high-frequency magnetic stress sensors, magnetostrictive ultrasonic transducers, precise instruments and the like is facilitated.
本发明属于磁致伸缩材料领域，主要涉及一种提高钴铁氧体材料磁致伸缩系数的制备方法及使用这种方法制备的钴铁氧体的产品。其工艺步骤主要包括：原料粉体制备、预烧、球磨、干粉压制成型、生坯排塑取向、热等静压烧结、磁场退火。本发明通过生坯排塑取向和样品磁场退火的制备工艺获得的钴铁氧体磁致伸缩材料致密度大于95％；平行方向磁致伸缩系数绝对值大于280ppm；磁致伸缩激励场小于1200Oe。与传统制备工艺相比，本发明使钴铁氧体磁致伸缩性能显著提升，有利于其在高频磁应力传感器、磁致伸缩超声换能器、精密仪器等领域的应用。
Preparation method for improving magnetostriction coefficient of cobalt ferrite material and cobalt ferrite product prepared by using method
一种提高钴铁氧体材料磁致伸缩系数的制备方法及使用这种方法制备的钴铁氧体的产品
JIANG TAO (Autor:in) / HE JINCHUN (Autor:in) / PI JUN (Autor:in) / XUE CHANGSHENG (Autor:in) / SHEN ZHIHUANG (Autor:in)
05.09.2023
Patent
Elektronische Ressource
Chinesisch
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