감온페라이트를 이용한 복합발열체의 온도특성

Abstract

Abstract - This study examined a complex heat conductor made of a Ni-Zn temperature sensitive ferrite with 10mm length and 3mm diameter and a metallic tube with 11mm length, 5mm external diameter, and 1.4mm thickness, and it also investigated the magnetic flux density that passes through an external magnetic field and temperature sensitive ferrite, and the temperature of complex heat conductor. The temperature sensitive ferrite used was a magnetic substance with very low permeability and 4 or so specific permeability at room temperature, and its permeability got sharply reduced around 50℃. This complex heat conductor reached 50℃ when the magnetic flux density of a temperature sensitive ferrite was 0.05T and the external magnetic field was 5kA/m, and in the more magnetic flux density than that, its temperature rise got controlled by the influence of the Qurie temperature of temperature sensitive ferrite. In the magnetic flux density of 0.05T, this pyrogen reached at 50℃ within 30 seconds, and the temperature remained with a maximum difference of less than 2℃ as time went by.