KR900001100B1 - Amorphous alloy for high frequency - Google Patents

Amorphous alloy for high frequency Download PDF

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KR900001100B1
KR900001100B1 KR1019850008013A KR850008013A KR900001100B1 KR 900001100 B1 KR900001100 B1 KR 900001100B1 KR 1019850008013 A KR1019850008013 A KR 1019850008013A KR 850008013 A KR850008013 A KR 850008013A KR 900001100 B1 KR900001100 B1 KR 900001100B1
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alloy
permeability
amorphous alloy
core loss
flux density
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KR870004160A (en
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천병식
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삼성전자 주식회사
정재은
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/02—Amorphous alloys with iron as the major constituent

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Abstract

An amorphous alloy has the composition ratio, Fe79-x-yCRxB16 Si5Cy(x=1-4, y=0.2-1.0). The alloy has the improved impedence perneability and reduced core loss. The alloy especially has the improved impedence permeability in a wide range of frequency.

Description

고주파용 고투자율 고자속밀도 비정질 합금High Permeability High Magnetic Flux Density Amorphous Alloy for High Frequency

본 발명은 비정질 합금의 뛰어난 연자성 특성을 이용하여 신호변화기, 전류 변류기등에 필요한 높은 포화 자속밀도, 넓은 주파수 대역에서 안정한 임피던스 투자율 및 저코아 손실등의 특성을 나타내는 비정질 합금에 관한 것이다.The present invention relates to an amorphous alloy exhibiting characteristics such as high saturation magnetic flux density, stable impedance permeability and low core loss in a wide frequency band, which are required for signal transformers, current transformers, etc. using the excellent soft magnetic properties of amorphous alloys.

비정질 금속은 근본적으로 각종 결합(Defect)이 없고, 결정질에서 볼 수 있는 결정 이방성(Crystal anisotropy)이 존재하지 않기 때문에 우수한 고투자율 특성을 실현할 수 있으며 상변태(Phase transformation)가 없기 때문에 넓은 조성범위에 걸쳐 연속적으로 자성특성을 얻도록 조성설계가 가능하다.Amorphous metals are fundamentally free from various defects and do not have crystal anisotropy that can be seen in the crystals, so they can achieve excellent high permeability characteristics and have no phase transformation. It is possible to design the composition so as to continuously obtain magnetic properties.

또한 고유저항이 크고, 박판재조가 용이하여 넓은 주파수 범위에서 우수한 연자성 특성을 나타낸다.In addition, it has a high specific resistance and easy sheet metal fabrication, which shows excellent soft magnetic properties over a wide frequency range.

이러한 비정질 합금은 처음에는 Fe-B계에서 출발하여 근래에는 Fe-B-Si 계 형태로 발전되었고, 그 조성비가 금속 : 반금속=80 : 20으로 구성되고 있으며 이 Fe-B-Si계 합금에 Cr과 C를 첨가한 비정질 합금 FeCr-BSiC계는 포화자속밀도가 페라이트(ferrite)나 슈퍼말로이(Supermalloy)에 비하여 높으며 넓은 주파수 범위에서 임피던스 투자율(Impedance Permeability)이 크고 안정하다.The amorphous alloy was first developed in Fe-B-based and recently developed into Fe-B-Si-based, and its composition ratio is composed of metal: semimetal = 80: 20. The amorphous alloy FeCr-BSiC system containing Cr and C has a higher saturation magnetic flux density than ferrite or supermalloy and has a high impedance permeability and stability over a wide frequency range.

또한 자속밀도 및 투자율이 온도의 상승에 따라 크게 변하지 않는 특징이 있다.In addition, magnetic flux density and permeability do not change significantly with the increase of temperature.

따라서 본 발명에서는 합금 조성을 Fe79-x-yCrxB16Si5Cy(1

Figure kpo00001
x
Figure kpo00002
, 0.2
Figure kpo00003
y
Figure kpo00004
1.0)로 하였으며 이 조성의 합금을 만들기 위해 Fe, Cr 99.9% Metallic purity, B, C는 99.0% metallic purity, Si는 99.95% metallic purity를 10-5gr까지 측정 가능한 정밀저울(Microbalance)을 이용하여 합금의 총무게를 10gr으로 하였고, Cr 및 C의 조성변화에 의한 자성 특성 변화를 관찰하기 위해 조성 재료별로 각각 제조하였다.Therefore, in the present invention, the alloy composition is Fe 79-xy Cr x B 16 Si 5 C y (1
Figure kpo00001
x
Figure kpo00002
, 0.2
Figure kpo00003
y
Figure kpo00004
1.0), Fe, Cr 99.9% metallic purity, B, C are 99.0% metallic purity, Si is 99.95% metallic purity using a microbalance that can measure up to 10 -5 gr. The total weight of the alloy was set to 10 gr, and each of the composition materials was manufactured to observe the change in magnetic properties due to the change in composition of Cr and C.

측정한 분말을 잘 혼합한 후 유압프레스로 900Kgf/㎠ 정도의 압력을 가하여 치밀하게 만든후 15kw 450KHz 고주파 유도 용해도에서 녹여 모합금을 제조한 후 헬륨(He) 분위기에서 일반적인 비정질금속 제조방법인 단롤(Single roll) 급냉법으로 리본(Ribbon) 형상을 제조하였다.After mixing the measured powder well, press the 900Kgf / ㎠ pressure with a hydraulic press to make it densely melted in 15kw 450KHz high frequency induction solubility to produce a mother alloy and then to produce a single alloy, a typical method of manufacturing amorphous metal in helium (He) atmosphere Single roll) Ribbon shape was prepared by a quench method.

이때 Chamber 내부 압력은 460Torr He으로 하였고 석영관 노즐분사압은 0.3-0.4kgf/㎠, roll의 표면속도는 35-40m/sec로 Setting 시켰다.At this time, the pressure inside the chamber was set to 460 Torr He, the nozzle injection pressure of the quartz pipe was set to 0.3-0.4kgf / ㎠, and the surface speed of the roll was set to 35-40m / sec.

이렇게하여 얻은 비정질 리본을 Tape wound 방법으로 Toroid core를 만들어 420-440℃, N2또는 Ar 가스 분위기에서 3-4시간 동안 10 Oe의 정자장 열처리를 시켜 각종 자성특성을 조사하였다.Amorphous ribbons were prepared by tape wound method, and then subjected to a magnetic field heat treatment of 10 Oe for 3-4 hours at 420-440 ° C, N 2 or Ar gas atmosphere to investigate various magnetic properties.

Fe Cr-B Si C계 비정질 합금은 Fe-B-Si계 비정질 합금에 Cr, C를 첨가한 것으로 Cr 첨가에 의해 리본표면에 Cr 산화물 보호피막을 생성시켜 반금속 원소의 표면 산화를 방지한다.The Fe Cr-B Si C-based amorphous alloy is obtained by adding Cr and C to the Fe-B-Si-based amorphous alloy to form a Cr oxide protective film on the ribbon surface by adding Cr to prevent surface oxidation of semimetal elements.

넓은 주파수 대역(1-100KHz)에서 임피던스 투자율등 안정한 자성특성을 나타내기 위하여 적당한 열처리에 의하여 소량의 α-Fe 비결정(Crystallite)을 생성시킴으로서 실현시킬 수 있는데 반금속 산화물은 적당한 α-Fe 생성을 어렵게 한다.In order to show stable magnetic characteristics such as impedance permeability in a wide frequency band (1-100KHz), it can be realized by generating a small amount of α-Fe crystallite by proper heat treatment. do.

Fe-B-Si 계에 Cr를 첨가했을때의 코아손실(Core loss)을 표 1에 나타내었다.The core loss when Cr is added to the Fe-B-Si system is shown in Table 1.

여기서, 적당량의 Cr 첨가로 우수한 고주파 특성이 실현됨을 알 수 있으며 x의 범위를 1

Figure kpo00005
x
Figure kpo00006
4로 한정하는 이유는, x〈1인 경우 Cr을 첨가하여도 내식성 향상을 기대하기 어려우며 x
Figure kpo00007
0-1 사이에서 코아손실이 급격히 증가하고, x〉4일 경우 포화자속밀도(Bs)〈13kg가 되어 즉, 포화자속밀도가 감소하여 변압기의 특성이 떨어지고 코아손실이 Cr을 전혀 넣지 않은 수준으로 상승되기 때문이다.Here, it can be seen that excellent high frequency characteristics are realized by adding an appropriate amount of Cr.
Figure kpo00005
x
Figure kpo00006
The reason for limiting to 4 is that when x <1, it is difficult to expect improvement in corrosion resistance even if Cr is added.
Figure kpo00007
The core loss rapidly increases between 0-1, and when x> 4, the saturation magnetic flux density (Bs) <13kg is reduced. Because it rises.

또한 C의 첨가는 α-Fe 미결정 생성을 증진시켜 넓은 주파수 대역에서 우수한 자성특성을 얻을 수 있다.In addition, the addition of C enhances the α-Fe microcrystal formation, thereby obtaining excellent magnetic properties in a wide frequency band.

여기서 y의 범위를 0.2

Figure kpo00008
y
Figure kpo00009
1.0으로 한정하는 이유는 y〈0.2인 경우 C 첨가에 의한 코아손실 감소효과를 기대하기 어렵고, y〉1.0인 경우 C를 전혀 첨가하지 않은 수준정도로 코아손실 감소를 기대하기 어려울 뿐만 아니라 비정질 형성기능이 저하되기 때문이다.Where y is 0.2
Figure kpo00008
y
Figure kpo00009
The reason for limiting to 1.0 is that it is difficult to expect the core loss reduction effect by the addition of C in the case of y <0.2. This is because it is degraded.

Fe Cr-B Si 계에 C첨가량에 따른 코아손실 의존성을 표 2에 나타내었다.Table 2 shows the core loss dependence of the amount of C added on the Fe Cr-B Si system.

임피던스 투자율의 주파수 의존성을 표 3에 나타내었는데 표에서 넓은 주파수 대역에서 안정한 투자율이 얻어짐을 알 수 있다.The frequency dependence of the impedance permeability is shown in Table 3, which shows that a stable permeability is obtained in the wide frequency band.

이와 같이 본 발명 비정질 합금은 고자속밀도 및 넓은 주파수 대역에서 우수한 임피던스 투자율을 안정하게 얻을 수 있었다.As described above, the amorphous alloy of the present invention was able to stably obtain an excellent impedance permeability in a high magnetic flux density and a wide frequency band.

기존의 Ferrite, Supermalloy 와의 각 특성비교를 표 4에 나타내었고 표에서 본 발명 비정질 합금이 높은 포화자속밀도, 고투자율, 저코아손실을 나타내었다.The characteristics of the conventional Ferrite and Supermalloy are shown in Table 4, and the amorphous alloy of the present invention showed high saturation magnetic flux density, high permeability, and low core loss.

[표 1]TABLE 1

Fe-79-xCrxB16Si5비정질 합금의 Cr 첨가에 따른 코아손실 의존성Core loss dependence of Cr addition of Fe- 79-x Cr x B 16 Si 5 amorphous alloy

Figure kpo00010
Figure kpo00010

[표 2]TABLE 2

Fe77-xCr2B16Si5Cy비정질 합금의 C첨가에 따른 코아손실의 존성Dependence of core loss on the C addition of Fe 77-x Cr 2 B 16 Si 5 C y amorphous alloy

Figure kpo00011
Figure kpo00011

[표 3]TABLE 3

Fe76.5Cr2B16Si5C0.5합금에서 임피던스 투자율의 주파수 의존성Frequency Dependence of Impedance Permeability in Fe 76.5 Cr 2 B 16 Si 5 C 0.5 Alloy

Figure kpo00012
Figure kpo00012

[표 4]TABLE 4

기존 Supermalloy, Mn-Zn ferrite 와 본 발명 비정질 합금의 자성특성 비교Comparison of Magnetic Properties of Conventional Supermalloy, Mn-Zn Ferrites and Inventive Amorphous Alloys

Figure kpo00013
Figure kpo00013

이상과 같은 결과에서와 같이 본 발명은 비정질 합금의 뛰어난 연자성특성을 이용하여 신호변환기, 전류변류기등에 필요한 높은 포화자속밀도, 넓은 주파수 대역에서 안정된 투자율 및 저코아손실등의 특성을 가진 비정질 자성재료를 개발할 수 있게 된 것이다.As described above, the present invention utilizes the excellent soft magnetic properties of amorphous alloys to provide high magnetic flux density, stable magnetic permeability in a wide frequency band, and low core loss. It is possible to develop.

Claims (1)

합금조성용 Fe79-x-yCrxB16Si5Cy(여기서 x는 1 x4, y는 0.2 y 1.0)으로된 고포화자자속밀도, 넓은 주파수 대역에서 임피던스 투자율을 향상시킴과 동시에 코아손실을 감소시키는 것을 특징으로 하는 고주파용 고투자율 고자속밀도 비정질 자성합금.High saturation magnetic flux density of Fe 79-xy Cr x B 16 Si 5 C y (where x is 1 x4 and y is 0.2 y 1.0) for alloy formation, improving impedance permeability and reducing core loss High magnetic permeability high magnetic flux density amorphous magnetic alloy for high frequency.
KR1019850008013A 1985-10-29 1985-10-29 Amorphous alloy for high frequency KR900001100B1 (en)

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