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Hard magnetic compositions from iron oxide fines and methods for making same

一种铁氧化物、氧化物的技术，应用在铁化合物、化学仪器和方法、电感/变压器/磁铁制造等方向，能够解决安全处理昂贵、担忧等问题

Inactive Publication Date: 2016-09-21
SAUDI BASIC IND CORP SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The safe disposal of these by-products is expensive and remains a serious concern in many countries around the world

Method used

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  • Hard magnetic compositions from iron oxide fines and methods for making same
  • Hard magnetic compositions from iron oxide fines and methods for making same
  • Hard magnetic compositions from iron oxide fines and methods for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0164] In one aspect, Tables 1 and 2 below show typical analyzes of iron ore materials or oxide fines that may be used to produce the disclosed hard magnetic materials. In other aspects, other ingredients can include various amounts of carbon, sulfur, sodium, potassium, and / or calcium.

[0165] Table 1. *

[0166]

[0167] * Amount provided as a percentage of the total composition (by weight)

[0168] Table 2. *

[0169]

[0170] * Amount provided as a percentage of the total composition (by weight)

Embodiment 2

[0172] In a general aspect, hard magnetic materials are prepared by mixing in a dry blend for a predetermined duration. The premix is ​​then dry milled for a predetermined duration. The blended powder mixture is then calcined at about 1000° C. for 4 to 12 hours and then reground in a dry atmosphere. Then, the calcined and ground mixture is fired at about 1100° C. to 1300° C. for about 2 to 6 hours at a heating rate of 10° C. / min in an air atmosphere. After firing, the cooled mixture was characterized by X-ray diffraction analysis (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM).

[0173] In this example, strontium carbonate (SrCO 3 ) (99% chemical purity) and steelmaking by-product iron oxides to prepare the hard magnetic material (SrFe 12 o 19 ). The iron oxide samples were characterized using X-ray diffraction analysis (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM). The discovery of iron...

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PUM

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Abstract

Disclosed herein are compositions and methods of making a hard magnetic material from iron oxide fines, the hard magnetic material having a general formula MFexOy. In one aspect, the method comprises a) providing an iron oxide fine; b) providing a metal carbonate of a general formula Mx(CO3)y; c) mixing the iron oxide fine and the metal carbonate to form a mixture; d) calcining the mixture of the iron oxide fine and the metal carbonate; wherein M is a divalent metal ion.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit and priority of U.S. Provisional Application No. 61 / 934586, filed January 31, 2014, and U.S. Provisional Application No. 62 / 043701, filed August 29, 2014, all of which are hereby incorporated by reference in their entirety Incorporated as a whole. technical field [0003] The present invention relates to a process for the preparation of hard magnetic materials having the general formula MFe from fine iron oxide powders x o y , the method includes: providing iron oxide fine powder; providing a general formula M x (CO 3 ) y a metal carbonate; mixing iron oxide fine powder and metal carbonate to form a mixture; a mixture of calcined iron oxide fine powder and metal carbonate; wherein M is a divalent metal ion. Background technique [0004] Hard ferrites are magnetic ceramics that retain their permanent magnetism and find applications in both electronic and non-electronic fields. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2633C04B35/622C04B2235/3208C04B2235/3206C04B2235/3201C04B2235/3217C04B2235/3243C04B2235/3239C04B2235/3232C04B2235/3262C04B2235/3418C04B2235/422C04B2235/42C04B2235/447C04B2235/444C01P2002/72C01P2004/03C01P2006/42C01G49/0036H01F1/10H01F41/0253
Inventor 穆罕默德·巴赫贾特·萨迪克法扎勒-乌尔-雷曼·M·阿万
Owner SAUDI BASIC IND CORP SA