A method for preparing powder for wireless charging according to the present invention comprises: a temperature-raising step of raising the temperature of iron-containing raw material particles up to a low-temperature heat treatment temperature of 600 °C or less in an oxygen-containing atmosphere for 30 minutes to 2 hours; and a heat treatment step of maintaining the temperature at the low-temperature heat treatment temperature for 1 to 10 hours to prepare powder for wireless charging in which an insulating layer is formed on the surfaces of the iron-containing raw material particles, thereby preparing powder for wireless charging having a current loss reduction index of 1.1 to 3 according to equation 1 defined in the detailed description of the present invention. By reducing loss, the powder can be used for wireless charging of electric vehicles and the like.

    본 발명의 무선충전용 파우더의 제조방법 등은 산소 함유 분위기에서 철 함유 원료입자를 600 ℃ 이하의 저온열처리온도까지 30분 내지 2시간 동안 승온하는 승온단계; 그리고 상기 저온열처리온도에서 1 내지 10시간 동안 유지하여 상기 철 함유 원료입자의 표면에 절연층이 형성된 무선충전용 파우더를 마련하는 열처리단계;를 포함하여, 발명의 상세한 설명에서 정의한 식 1에 따른 전류손실저감지수가 1.1 내지 3의 값을 갖는 무선충전용 파우더를 제조하며, 손실을 줄여 전기자동차 등의 무선충전용으로 활용될 수 있다.


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    Title :

    POWDER FOR WIRELESS CHARGING ELEMENT PREPARING METHOD FOR THE SAME AND SHEET COMPRISING THE SAME


    Additional title:

    무선충전용 파우더, 이의 제조방법 및 이를 포함하는 무선충전용 시트


    Contributors:

    Publication date :

    2020-10-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B22F Verarbeiten von Metallpulver , WORKING METALLIC POWDER / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01F MAGNETS , Magnete / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung




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