CN112868071A - 磁性构件用的阻燃性粉末和聚合物组成物 - Google Patents
磁性构件用的阻燃性粉末和聚合物组成物 Download PDFInfo
- Publication number
- CN112868071A CN112868071A CN201980068874.1A CN201980068874A CN112868071A CN 112868071 A CN112868071 A CN 112868071A CN 201980068874 A CN201980068874 A CN 201980068874A CN 112868071 A CN112868071 A CN 112868071A
- Authority
- CN
- China
- Prior art keywords
- powder
- flame
- retardant
- alloy
- flame retardancy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000843 powder Substances 0.000 title claims abstract description 93
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000003063 flame retardant Substances 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 title claims description 13
- 229920000642 polymer Polymers 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 30
- 230000004907 flux Effects 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 229910017082 Fe-Si Inorganic materials 0.000 claims abstract description 7
- 229910017133 Fe—Si Inorganic materials 0.000 claims abstract description 7
- 229920005601 base polymer Polymers 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 238000009689 gas atomisation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000889 atomisation Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910008458 Si—Cr Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 229910019819 Cr—Si Inorganic materials 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/02—Inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/11—Compounds containing metals of Groups 4 to 10 or of Groups 14 to 16 of the Periodic Table
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
- H01F1/26—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated by macromolecular organic substances
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/016—Flame-proofing or flame-retarding additives
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- Inorganic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
提供一种饱和磁通密度高且阻燃性优异的粉末。该粉末是磁性构件用的阻燃性粉末,包含多个扁平粒子。这些粒子由含有7质量%以上且12质量%以下的Si的Fe-Si系合金形成。该合金中的Si的质量含有率P(Si)与阻燃性参数PNF,满足下述算式(Ⅰ)和(Ⅱ):(-0.97×P(Si)+13.0)<PNF≤10(Ⅰ)PNF=D50×TD/ρ(Ⅱ)(式中,D50表示粉末的中值直径,TD表示粉末的振实密度,ρ表示粉末的真密度)。
Description
技术领域
本发明涉及磁性构件用的阻燃性粉末和聚合物组成物。详细地说,涉及分散在电磁波吸收片等构件中的粉末、及含有该粉末的聚合物组成物。
背景技术
个人电脑、手机等的电子设备具有电路。从安装于该电路的电子元件放射的电波噪声引起电子元件彼此间发生电波干扰,以及电子电路彼此间发生电波干扰。电波干扰招致电子设备的错误操作。出于抑制错误操作的目的,而在电子设备中插入电磁波吸收片。
在近年的信息通信中,追求通信速度的高速化。在此高速通信中使用高频的电波。因此,希望有适合在高频区域使用的电磁波吸收片。
电子元件的放热招致电子设备的内部的升温。因此电磁波吸收片需要阻燃性。
在专利文献1(日本特开2001-332413号公报)中公开有一种含有金属粉末、阻燃剂和基材树脂的复合磁体。该金属粉末由Fe-Cr-Si合金构成。
在专利文献2(日本特开2005-353686号公报)公开有一种包含有机基体、分散在该基体中的粉末和阻燃剂的电波吸收体。该粉末由Fe-Si-Cr系合金或Fe-Al-Si系合金构成。
在专利文献3(日本特开2018-170330号公报)中公开有由Fe-Si-Cr系合金构成的磁性粉末,和由Fe-Al-Si系合金构成的磁性粉末。这些粉末的粒子具有氧化皮膜。该氧化皮膜有助于阻燃性。
在先技术文献
专利文献
专利文献1:日本特开2001-332413号公报
专利文献2:日本特开2005-353686号公报
专利文献3:日本特开2018-170330号公报
若在高频区域使用磁性粉末,则由于磁共振现象导致导磁率受损。因此对于该粉末要求有高饱和磁通密度。现有的阻燃性粉末的饱和磁通密度不充分。
发明内容
本发明的目的在于,提供一种饱和磁通密度高,且阻燃性优异的磁性构件用粉末。
本发明的一个方式的磁性构件用的阻燃性粉末,包含多个(或许多)扁平粒子。这些粒子由含有7质量%以上且12质量%以下的Si的Fe-Si系合金形成。该合金中的Si的质量含有率P(Si)与阻燃性参数PNF满足下述算式(Ⅰ)和(Ⅱ):
(-0.97×P(Si)+13.0)<PNF≤10 (Ⅰ)
PNF=D50×TD/ρ (Ⅱ)
(式中,D50表示粉末的中值直径,TD表示粉末的振实密度,ρ表示粉末的真密度)。
优选阻燃性粉末的饱和磁通密度为1.3T以上。
本发明的另一方式的磁性构件用的聚合物组成物,含有基材聚合物、和分散在该基材聚合物中的阻燃性粉末。该阻燃性粉末,包含多个(或许多)扁平粒子。这些粒子由含有7质量%以上且12质量%以下的Si的Fe-Si系合金形成。该合金中的Si的质量含有率P(Si),与粉末中的阻燃性参数PNF,满足下述算式(Ⅰ)和(Ⅱ):
(-0.97×P(Si)+13.0)<PNF≤10 (Ⅰ)
PNF=D50×TD/ρ (Ⅱ)
(式中,D50i表示粉末的中值直径,TD表示粉末的振实密度,ρ表示粉末的真密度)。
本发明的粉末的饱和磁通密度大。而且该粉末其阻燃性优异。
附图说明
图1是表示本发明的一个实施方式的阻燃性粉末的粒子示意性的剖视图。
图2是表示阻燃性粉末中的Si的含有率与阻燃性参数的关系的图。
具体实施方式
以下,一边适宜参照附图,一边基于优选的实施方式详细地说明本发明。
[粒子形状]
本发明的阻燃性粉末,是多个或许多粒子的集合。图1中显示1个粒子的截面。在图1中,符号L所示的是粒子的长轴的长度,符号T所示的是粒子的厚度。长度L大于厚度T。换言之,该粒子为扁平。
该粉末的长宽比优选为1.5以上且100以下。在使用了长宽比为1.5以上的粉末的磁性构件中,高频区域的导磁率实部μ’和导磁率虚部μ”足够大。从这一观点出发,特别优选长宽比为5以上。在使用了长宽比为100以下的粉末的磁性构件中,粉末之间接触的地方受到抑制,可抑制涡流带来的损失。从这一观点出发,特别优选长宽比为80以下。
在长宽比的测量中,使用能够观察到扁平粉末的厚度方向的树脂包埋的试料。研磨该试料,利用扫描型电子显微镜(SEM)观察研磨面。观察时的图像的倍率为500倍。在此图像的分析中,图像数据被二值化。通过此分析测量各粒子的长宽比,将这些数据进行算术平均,计算粉末的长宽比。还有,各粒子的长宽比,是二值化图像近似于椭圆时的“长轴的长度L/短轴的长度T”。
[组成]
本发明者在Fe中添加各种元素,评价阻燃性和饱和磁通密度。其结果显示在下述的表1中。
【表1】
表1阻燃性和饱和磁通密度
由表1的结果判明,相比Cr、Mo、W、V和Co,Si和Al有助于阻燃性。此外还判明,在含有的原子百分率相同时,相比Al,Si更有助于饱和磁通密度。基于表1的结果,本发明者作为粒子的合金元素而选定了Si。
粒子由Fe-Si系合金形成。在含Si的粒子的表面,生成有其组成为SiO2的氧化皮膜。此氧化皮膜抑制Fe与氧的接触,因此抑制Fe的氧化反应。包含具有该氧化皮膜的粒子的粉末,阻燃性优异。含Si的粉末,磁晶各向异性、磁致伸缩常数和矫顽磁力低。从这些观点出发,优选Si的含有率为7质量%以上,特别优选为8质量%以上。过量含有Si的粉末的饱和磁通密度低。从饱和磁通密度的观点出发,优选Si的含有率为12质量%以下,更优选为11质量%以下,特别优选为10质量%以下。
该合金的Si的余量,优选是Fe和不可避免的杂质。
[阻燃性参数]
在本说明书中,根据下述的算式(II),计算阻燃性参数PNF。
PNF=D50×TD/ρ (II)
在此算式(II)中,D50表示粉末的中值直径,TD表示粉末的振实密度,ρ表示粉末的真密度。真密度以干式密度计(岛津制作所社制,型号ァキユピック1330)测量。
该参数PNF满足下述的算式(Ⅰ)。
(-0.97×P(Si)+13.0)<PNF≤10 (Ⅰ)
在此算式中,P(Si)是Fe-Si系合金中的Si的质量含有率。
参数PNF大于(-0.97×P(Si)+13.0)的值的粉末,阻燃性优异。从这一观点出发,参数PNF更优选为(-0.97×P(Si)+14.5)的值以上,特别更优选为(-0.97×P(Si)+15.0)的值以上。由参数PNF为10以下的粉末,能够得到均质且表面平滑的磁性构件。从这一观点出发,参数PNF更优选为8以下,特别优选为6以下。
[饱和磁通密度Bs]
饱和磁通密度Bs大的粉末,磁共振现象在高频区域发生。从这一观点出发,粉末的饱和磁通密度Bs优选为1.3T以上,更优选为1.4T以上,特别优选为1.5T以上。饱和磁通密度Bs优选为2.0T以下。
饱和磁通密度Bs,以振动样品磁强计(VSM)测量。测量条件如下。
最大外加磁场:1204kA/m
粉末的质量:约70mg
[矫顽磁力Hc]
矫顽磁力Hc大的粉末,磁共振频率高。从这一观点出发,粉末的矫顽磁力Hc优选为500A/m以上,更优选为550A/m以上,特别优选为600A/m以上。矫顽磁力Hc优选为1600A/m以下。
矫顽磁力是用于使被磁化后的磁性体回归未磁化状态所需要的外部磁场的强度。矫顽磁力例如能够以Qumano社的矫顽磁力计“HC801”测量。测量时的最大外加磁场为144kA/m。
[中值直径D50]
从阻燃性的观点出发,粉末的中值直径D50优选为20μm以上,更优选为25μm以上,特别优选为30μm以上。从能够得到均质且表面平滑的磁性构件这一观点出发,中值直径D50优选为90μm以下,更优选为80μm以下,特别优选为70μm以下。
中值直径D50,是以粉末的总体积作为100%而求得累积曲线时,该累积曲线为50%这一点的粒子直径。中值直径D50,例如,用日机装社的激光衍射·散射式粒径分布测量装置“マイクロトラックMT3000”测量。粉末与纯水一起被注入该装置的槽内,基于粒子的光散射信息,检测出中值直径D50。
[振实密度TD]
从阻燃性的观点出发,粉末的振实密度TD优选为0.6g/cm3以上,更优选为0.7g/cm3以上,特别优选为0.8g/cm3以上。从能够得到均质且表面平滑的磁性构件这一观点出发,振实密度TD优选为1.7g/cm3以下,更优选为1.5g/cm3以下,特别优选为1.3g/cm3以下。
振实密度TD,依据“JIS Z 2512”的规定测量。在测量中,约20g的粉末被填充到容积为100cm3的量筒中。测量条件如下。
落下高度:10mm
锤击次数:200
[粉末的制造]
本发明的粉末,通过对原料粉末实施扁平加工而得到。原料粉末能够通过气体雾化法、水雾化法、盘式雾化法、粉碎法等取得。优选气体雾化法和盘式雾化法。
在气体雾化法中,原料金属被加热熔化,得到熔融金属。该熔融金属从喷嘴流出。对于该熔融金属喷送气体(氩气、氮气等)。借助该气体的能量,熔融金属粉化而成为液滴,一边落下一边被冷却。该液滴凝固,形成粒子。在此气体雾化法中,因为熔融金属瞬间液滴化,与此同时被冷却,所以能够得到均匀的微细组织。而且,因为液滴连续地形成,所以粒子间的组成差极小。
在盘式雾化法中,原料金属被加热熔化,得到熔融金属。该熔融金属从喷嘴流出。该熔融金属落在高速旋转的盘之上。熔融金属被急冷而凝固,得到粒子。
对于该原料粉末实施扁平加工。典型的扁平加工,用磨碎机进行。
经过分级,能够得到原料粉末。根据需要对于原料粉末实施热处理。根据需要,对于扁平粉末实施热处理、分级等处理。
[磁性构件的成形]
为了由此粉末得到磁性构件,首先,将粉末与树脂和橡胶这样的基材聚合物进行混炼,得到聚合物组成物。混炼能够采用已知的方法。例如,可利用密闭式混炼机、开炼机等进行混炼。
其次,由该聚合物组成物成形磁性构件。在成形中,能够采用已知的方法。能够通过压缩成形法、射出成形法、挤压成形法、轧制法等进行成形。典型的磁性构件的形状为片状。磁性构件能够采用环状、立方体状、长方体状、圆筒状等形状。含本发明的粉末的磁性构件,特别适合在300MHz以上的频率范围使用。
基材聚合物中,能够和粉末一起混炼各种化学药剂。作为化学药剂,可例示润滑材和粘合剂这样的加工助剂。聚合物组成物中,也可以含有阻燃剂。因为粉末有助于阻燃性,所以不需要添加大量的阻燃剂。
【实施例】
以下,通过实施例可揭示本发明的效果,但本发明不应基于此实施例的记述限定性地解释。
[实施例1]
通过气体雾化、分级和由湿式磨碎机进行的扁平加工,制作具有下述的表2所示组成的实施例1的粉末。该粉末的中值直径D50、振实密度TD、阻燃性参数PNF、饱和磁通密度Bs和矫顽磁力Hc显示在下述的表2中。
[实施例2~5和比较例1~5]
除了使组成如下述表2所示以外,其余均与实施例1同样,制作实施例2~5和比较例1~5的粉末。
[阻燃性的评价]
通过小气体火焰点火试验,判定粉末是否符合消防法所规定的第2类第1种可燃性固体。判定标准如下:
A:不符合下述B。
B:3秒以内着火,且继续燃烧。
判定为A的粉末,视为非第1种可燃性固体。判定为B的粉末,视为第1种可燃性固体。其结果显示在下述的表2中。
【表2】
图2的图所示的直线L2的方程式为,
PNF=-0.97×P(Si)+13.0
实施例1~5的粉末,在此图中,位于直线L2上方。换言之,实施例1~5的粉末,具备下述算式。
(-0.97×P(Si)+13.0)<PNF
根据此评价结果,可知本发明的优越性。
本发明的粉末适合各种磁性构件。
Claims (3)
1.一种磁性构件用的阻燃性粉末,其包含多个扁平粒子,
所述扁平粒子,由含有7质量%以上且12质量%以下的Si的Fe-Si系合金形成,
所述合金中的Si的质量含有率P(Si)与阻燃性参数PNF满足下述算式(Ⅰ)和(Ⅱ):
(-0.97×P(Si)+13.0)<PNF≤10 (Ⅰ)
PNF=D50×TD/ρ (Ⅱ)
式中,D50表示所述粉末的中值直径,TD表示所述粉末的振实密度,ρ表示所述粉末的真密度。
2.根据权利要求1所述的阻燃性粉末,其中,所述阻燃性粉末的饱和磁通密度为1.3T以上。
3.一种磁性构件用的聚合物组成物,其含有基材聚合物、和分散在所述基材聚合物中的阻燃性粉末,
所述阻燃性粉末包含多个扁平粒子,
所述扁平粒子由含有7质量%以上且12质量%以下的Si的Fe-Si系合金形成,
所述合金中的Si的质量含有率P(Si)与所述粉末中的阻燃性参数PNF满足下述算式(Ⅰ)和(Ⅱ):
(-0.97×P(Si)+13.0)<PNF≤10 (Ⅰ)
PNF=D50×TD/ρ (Ⅱ)
式中,D50表示所述粉末的中值直径,TD表示所述粉末的振实密度,ρ表示所述粉末的真密度。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-007663 | 2019-01-21 | ||
JP2019007663A JP7257150B2 (ja) | 2019-01-21 | 2019-01-21 | 磁性部材用の難燃性粉末 |
PCT/JP2019/049422 WO2020153050A1 (ja) | 2019-01-21 | 2019-12-17 | 磁性部材用の難燃性粉末及びポリマー組成物 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112868071A true CN112868071A (zh) | 2021-05-28 |
Family
ID=71735697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201980068874.1A Pending CN112868071A (zh) | 2019-01-21 | 2019-12-17 | 磁性构件用的阻燃性粉末和聚合物组成物 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220119713A1 (zh) |
JP (1) | JP7257150B2 (zh) |
KR (1) | KR102620616B1 (zh) |
CN (1) | CN112868071A (zh) |
WO (1) | WO2020153050A1 (zh) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL174546C (nl) * | 1972-09-08 | 1984-07-02 | Akzo Nv | Werkwijze voor de bereiding van een (ar)alkeen-carbonzuur. |
JP4683178B2 (ja) | 2001-03-12 | 2011-05-11 | 株式会社安川電機 | 軟質磁性材料およびその製造方法 |
JP2005236219A (ja) | 2004-02-23 | 2005-09-02 | Daido Steel Co Ltd | 複合磁性シート |
JP2006147959A (ja) | 2004-11-22 | 2006-06-08 | Daido Steel Co Ltd | 圧粉磁芯および圧粉磁芯の製造方法 |
CN101501930A (zh) | 2006-08-14 | 2009-08-05 | 泰科电子瑞侃株式会社 | 天线装置及其制造方法 |
JP2011029678A (ja) | 2007-11-20 | 2011-02-10 | Tyco Electronics Raychem Kk | アンテナ素子およびその製造方法 |
JP2011222897A (ja) | 2010-04-14 | 2011-11-04 | Daido Steel Co Ltd | 圧粉磁心、圧粉磁心用磁性粉体及び圧粉磁心の製造方法 |
JP5822455B2 (ja) | 2010-11-12 | 2015-11-24 | 小松精練株式会社 | 磁性シート及びその製造方法 |
JP6071211B2 (ja) | 2011-02-22 | 2017-02-01 | 三菱マテリアル株式会社 | 低磁歪高磁束密度複合軟磁性材とその製造方法 |
JP6795995B2 (ja) * | 2017-02-06 | 2020-12-02 | 山陽特殊製鋼株式会社 | 軟磁性扁平粉末 |
-
2019
- 2019-01-21 JP JP2019007663A patent/JP7257150B2/ja active Active
- 2019-12-17 KR KR1020217008803A patent/KR102620616B1/ko active IP Right Grant
- 2019-12-17 CN CN201980068874.1A patent/CN112868071A/zh active Pending
- 2019-12-17 US US17/424,225 patent/US20220119713A1/en active Pending
- 2019-12-17 WO PCT/JP2019/049422 patent/WO2020153050A1/ja active Application Filing
Also Published As
Publication number | Publication date |
---|---|
KR102620616B1 (ko) | 2024-01-03 |
US20220119713A1 (en) | 2022-04-21 |
JP2020119932A (ja) | 2020-08-06 |
JP7257150B2 (ja) | 2023-04-13 |
WO2020153050A1 (ja) | 2020-07-30 |
KR20210116417A (ko) | 2021-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6712655B2 (ja) | 軟磁性粉末、軟磁性材料、並びに圧粉磁心の製造方法 | |
WO2014136148A1 (en) | Powder made of iron-based metallic glass | |
WO2017175831A1 (ja) | 鉄基金属ガラス合金粉末 | |
WO2020195968A1 (ja) | 磁性部材用の合金粉末 | |
US20190013129A1 (en) | Dust core | |
US11854725B2 (en) | Soft magnetic metal powder, method for producing the same, and soft magnetic metal dust core | |
JP2018073947A (ja) | 軟磁性合金、軟磁性合金粉末及び磁性部品 | |
JP6955685B2 (ja) | 軟磁性金属粉体及びその製造方法 | |
KR20220098126A (ko) | 페라이트 분말, 페라이트 수지 복합 재료 및 전자파 쉴드재, 전자 재료 또는 전자 부품 | |
CN112868071A (zh) | 磁性构件用的阻燃性粉末和聚合物组成物 | |
JP2010047788A (ja) | 鉄基合金水アトマイズ粉末とその鉄基合金水アトマイズ粉末の製造方法 | |
EP3564972A1 (en) | Soft magnetic powder, powder magnetic core, magnetic element, and electronic device | |
JP2019137904A (ja) | 軟磁性合金粉末、その製造方法、および、それを用いた圧粉磁心 | |
JP2007273732A (ja) | ノイズ抑制用軟磁性金属粉末及びノイズ抑制シート | |
KR20230144518A (ko) | 연자성 편평분말 | |
KR102155542B1 (ko) | 근방계용 노이즈 억제 시트 | |
WO2024128217A1 (ja) | 軟磁性扁平粉末及び磁性部材 | |
JP2019090103A (ja) | 軟磁性金属粉末およびその製造方法ならびに軟磁性金属圧粉コア | |
JP7177393B2 (ja) | 軟磁性金属粉末 | |
JP7428013B2 (ja) | 軟磁性合金粉末、電子部品及びその製造方法 | |
US20240278316A1 (en) | Amorphous Alloy Soft Magnetic Powder, Dust Core, Magnetic Element, And Electronic Device | |
JP7314678B2 (ja) | 軟磁性合金粉末及びそれを用いた電子部品 | |
JP2022105907A (ja) | 硬磁性粉末 | |
JP2023133693A (ja) | 軟磁性粉末、圧粉磁心、磁性素子および電子機器 | |
JP2023031985A (ja) | 絶縁物被覆軟磁性粉末、絶縁物被覆軟磁性粉末の製造方法、圧粉磁心、磁性素子、電子機器および移動体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |