TW459253B - Iron powder and method for the preparation thereof - Google Patents
Iron powder and method for the preparation thereof Download PDFInfo
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- TW459253B TW459253B TW089106626A TW89106626A TW459253B TW 459253 B TW459253 B TW 459253B TW 089106626 A TW089106626 A TW 089106626A TW 89106626 A TW89106626 A TW 89106626A TW 459253 B TW459253 B TW 459253B
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
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- B22F1/16—Metallic particles coated with a non-metal
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
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- 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
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
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- Y10T428/12—All metal or with adjacent metals
- Y10T428/12181—Composite powder [e.g., coated, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
459253 五、發明說明(1) 發明範圍 〜 本發明係關於一種在軟磁性 %庄應用中使用的鐵格古顆虫 提供薄靜電絕緣表面層之方法+ π i π杨末顆粒上 關於壓緊及加熱處理這些粉太 冰末本身-、 的中、太適厶於製備古兮I 之方法。尤其疋根據本發明 的粕末通σ π I備问效率應用之軟磁性物質。 發明背景 已長期將以鐵為主之顆粒當成以粉末冶金法之 份製造法中的基本物質使用。也已這此 /構[生,,且 也匕逞些扮末冶金法製造磁 性核心組份,但是’通常會以描蝰物所ro P矿Μ絕緣物吳%繞層塗佈在上 方法中使用的以鐵為主之顆粒。 一 已將在利用經塗佈以鐵為主之粉太的 ~ <物不的磁性核心組份之粉 末冶金製造法中的研究專注發展會增加特定的物理及磁性 特性(不會對其它特性有不利的影響)之鐵粉末組合物。預 期的特性包括高延伸頻率範圍之滲透性、高壓制強度、低 核心耗損及壓縮模製技術的適用性。 在文獻中揭示用於顆粒的不同型式之絕緣塗料。 Λ 因此’德國專利申請案第1 29 1 0 28號揭示一&種提供電塗 料之方法,將鐵粉末與含有鉻酸及磷酸之水在上昇的溫度 下混合、清洗及乾燥粉末。鐵粉應該具有小於丨〇微米之^ 粒尺寸。該申請案未揭示利用鐵粉末製備之物質的任何磁 性特性^ 另一個在該領域之申請案是德國專利申請案第 2 825 235號’其揭示將由顆粒組成的鐵粉θ末以氧化物層 塗佈。顆粒尺寸介於〇. 至〇. 15毫米之間,並且顆粒具有
'459253 ^^______ 五、發明說明(2) _ 氣化物塗層,其包括以顆粒重量為基礎計算〇. 3至〇. 8重量 %之氧。以在空氣中加熱或以化學氧化作用可獲得氧化物 塗層,但是,未揭示任何處理參數及任何塗佈顆粒之分 折。可自實施例計算出所獲得的滲透性是以30至35為範 園。 歐州專利申請案第434 66 9號係關於一種磁性粉末,其 +以靜電絕緣塗層隔離磁性粉末顆粒。顆粒具有1 〇 -30 0微 来之平均顆粒尺寸,並且覆蓋每一個磁性粉末顆粒之絕緣 物質包含具有1 〇微米或更小的厚度之連續絕緣膜,而該膜 包含金屬烷氧化物或其分解產物。 9 5/294 90揭示具有利用磷酸水溶液獲得的絕緣層之 鐵粉末顆粒及WO 9 7/308 1 0揭示以在有機溶劑中的磷酸獲 得極薄的絕緣層。 η 。德國專利申請案第3 4 3 9 3 9 7號揭示以磷酸鹽塗層經靜 電絕緣之鐵顆粒。該塗層可能是例如磷酸鎂或磷酸鋅,並 以塗層是磷酸鐵塗層較佳。絕緣的磷酸鹽塗層應該具有介 於(K 1至1. 5%之鐵顆粒重量。在實施例i中揭示磷酸鐵塗層 製借作用’其包含將鐵顆粒與在丙酮中的89%之碟酸溶 ^ 2合。然後將顆粒壓緊及接著在氧化空氣中加熱。在壓 驟^前,以磷酸鹽絕緣之鐵顆粒可視需要與樹脂混 ;* =二氧樹脂較佳。為了獲得低滯後耗損,建議加熱溫 二劫、^段C及低於8GG t。而且,該加熱處理應該以逐步 :产的二正常壓力或增壓及以不同的時間期限逐步增加 又、^進行。該已知方法的優點是以實驗方式揭示熱
胃6頁 459253 7 _案號89106626 今口年心月B日__
I 五、發明說明(4) 處理,其中在至少6 0 0 °C的溫度下進行最終步驟。該專利 的表I V揭示絕緣的磷酸鹽層具有有效的心較性低頻率,即 低於1千赫茲之頻率。 歐州專利申請案第81 0 6 1 5號包含以絕緣磷酸層發展的 粉末顆粒。根據—該專利,利用特殊的鱗酸化溶液獲得絕緣 層,其包含溶劑及碟酸鹽及防銹劑,其是含有氮及/或硫 之有機化合物,其具有壓縮氧化鐵及界面活性劑形成作用 之未共享電子對。該粉末有用於製備高頻率應用之軟磁性 物質。 發明的目的 本發明的一個目的是提供新鐵係主成份之粉末,提供具 有薄絕緣層之顆粒β . 本發明的第二個目的是提供特別適合於製備企圖在高頻 率下應用之軟磁性物質之新粉末。 本發明的第三個目的是提供具有高延伸頻率範圍之滲透 性及具有抗高溫性之粉末。 本發明的第四個目的是提供可壓緊成高密度之粉末。 本發明的第五個目的是提供以環境可接受、省能量及省 時之方法可獲得的絕緣層,其不需要使用有機溶劑、毒性 金屬或特殊的有機添加劑。 本發明的概述 - 新粉末係以可獲得滿足以上目的之有效的絕緣層或塗層 之發現為根據,假設絕緣層包括有限量的鎂。將鐵鹼粉末 以在含有鎂之溶劑中(以水較佳)的酸處理可獲得這種層。
O:\63\63653.ptc 第7頁 2001.06.12.007 459253 ^ _案號89106626 气^年 月 (3 曰 修正 五、發明說明(5) 本發明也包含製造具有改良的軟磁性特性(尤其是在高 頻率下)之组份之方法,將視需要與熱固性或熱塑性樹脂 組合之該絕緣的鐵粉末之粉末組合物壓緊或鑄模壓縮及接 著將該壓緊之組合物在較佳以不超過7 5 0 °C的溫度下進行 熱處理。 ' 圖式簡單說明 圖1顯示添加Mg 0的量和顆粒表面中Mg,0和P含量之關 係。 圖2顯示顆粒表面中Mg含量對穿透度之影響。 圖3顯示顆粒表面中Mg含量對頻率穩定度之影響。 圖4顯示於不同氛圍下熱處理對穿透度之影響。 圖5顯示熱處理對頻率穩定性之影響-。 本發明的詳細說明 新粉末係以鹼粉末為主,其基本上是由純鐵組成的較 佳,並可能包括例如在商業上可取得具有圓形、不規則形 或平坦狀顆粒之粉末鐵粉末或海綿鐵粉末组成的較佳。但 是,鹼粉末也可以是以鐵為主之粉末,如Fe-Si合金、 F e - A1合金、透磁鐵或鋁矽鐵粉。 鹼粉末之顆粒尺寸係根據粉末企圖的最終用途而定,並 通常是小於4 0 0微米,並以小於1 5 0微米較佳。關於較高的 頻率,以小於4 5微米之顆粒尺寸較佳。 絕緣法包括以溶液(以酸性溶液較佳)處理粉末之步驟, 其包括以對應於每公斤鐵粉末0.015-0. 3% MgO (即0.15-3 公克)量之鎮。溶液是以水溶液較佳,因為MgO之溶解度在
O:\63\63653.ptc 第8頁 2001.06.12.008 ^ 459253 五、發明說明(5) _ 有機溶劑中(如丙酮)太低。以將MgO溶解在酸及少量的水· 中製備絕緣溶液較佳。酿是麟酸較佳,雖然可以使用其它 酸’如琐酸。使用的酸量是1-10毫升/公斤粉末。 在可視需要的上昇溫度下使粉末乾燥之後,分析揭示粉 末之Mg含直以基本上純鐵為基礎關於水粉化粉末係在介於 0.008至0.1重量%之間變化及關於海綿粉末係在介於〇〇59 至0. 1 5 1重量%之間變化。但是,顯然絕緣粉末之總含量 係根據鹼粉末之型式及Mg含量而改變。 也可以利用以下的SEM技術定義在絕緣層中的Mg含量。 在以EDS (能量分散分光計;)協助之Je〇1 58〇〇 分析 顆粒(放大1 5 0 0倍)^將由極純的單一結晶鍺組成的固體狀 態偵測器冷卻至液體氮溫度。以偵測器吸收的χ _射線產生 許多與每一個X -射線量子能量成比例之電子洞對。將偵測 器的信號進一步放大,輸入根據其振幅將脈衝分類之多管 道分析儀》將資料以能量圖呈現,在此以強度(即量子數) 對以keV計之量子能量作圖。以在圖中的峰位置獲得定性 資料及峰下的面積獲得定量資料。定量必須經由許多相處 理、背景移除、重疊峰之除迴旋及元件濃度的計算。 以點么析獲得能量先譜。峰的穿透深度約3_ 5微米。利 用ZA卜校正步驟,即原子數(z)校正,吸收性(a)及螢光、一) (f)進仃疋量分析。在定量之前,先將能量刻度對鈷標準 f據在以下稱為SEM分析之該技術,水粉末鐵粉末之顆 粒表®應該具有〇. 04至2· 6%之鎂量較佳。
;459253 __索號891Q6626_年G月(彡曰 修正____ 五、發明說明(Ό ' 可根據圖1的觀察,在加入的M gO與根據SEM分析在顆粒 表面中的Mg含量之間有好的校正。 本發明也包括製備壓縮的軟磁性粉末核心之方法,其 含步驟: ~ 可視需要將新~粉末與潤滑劑及/或熱固性或熱塑性樹脂 混合; θ 將獲得的混合物以3 0 0至1 5 0 0百萬巴斯卡之間的壓力歷 緊; 將壓緊之實體在惰性或氧化氣體中加熱至介於丨〇〇至750 °C之間經介於約5至約6 0分鐘之間的時間; 將退火的實體冷卻。 潤滑劑量可以是約〇· 1至1 . 0重量%之粉末,並在壓緊步 驟之前’可視需要先加入有機熱固性或熱塑性樹脂。潤滑 劑的代表性實例是Ke no lube®、Η蠟、EBS及硬脂酸酯,如 硬脂酸鋅。有機樹脂可選自熱塑性或熱固性樹脂,如
Perac i t®、U1tem®。 壓緊可同時在室溫及上昇的溫度下進行β 加熱可以在空氣或惰性氣體中進行。氮是較佳的氣體, 以獲得改良之磁性特性,尤其是在高溫下,如約γ 〇 〇。 而且,正常下加熱是在單一步驟中進行。 同時在以上提及的德國專利申請案第34 39 397號及歐 洲專利申請案第8 1 0 61 5號中提及以鎂當成絕緣層之組 成。 但是’在德國專利申請案中沒有任何實施例揭示在絕緣
O:\63\63653.ptc 第10頁 2001. 06. 12.010 459253 _案號 89106626 年匕月[Β» 曰 修正 五、發明說明(8) 層中任何有關的可能及提及的鎂量。唯一提及鎂的實施例 是實施例1 0,根據在絕緣之前將氧化鎂與粉末混合。這表 示鎮是驗粉末的一部份,在退火至1200 1之前,先以麟酸 處理’以便於得到絕緣層。未揭示在外層含有的鎂之絕緣 效果。 ~ 歐洲專利申請案第8 1 0 6 1 5號指導含有鎂之絕緣層。自 含有即鎮之絕緣層成形溶液獲得層。但是,為了避免生銹 問題,故必須將特殊的化學品加入絕緣層成形溶液中。 根攄本發明’因此已意外發現也不要以根據歐洲專利公 告案必要的防銹劑、硼酸及/或界面活性劑(如全氟烷基界 面活性劑、烧基苯項酸界面活性劑、兩性界面活性劑及聚 酯界面活性劑)可避免生銹問題。 . 根據在圖中的例證,也已經發現關鍵性的鎂量是必要 的,以達到好的磁性特性,如高渗透性及頻率安定性。 由以下的實施例例證本發明。 實施例1 本發明例證在絕緣層中存在的Mg效果。 實驗進行如下: 將MgO溶解在水磷酸溶液中及與鐵鹼粉末(高純度,具有 顆粒尺寸< 1 5 0微米之水粉化鐵粉末)混合。MgO量是1 〇 〇 〇公 克鐵粉末計0.06% ^在乾燥之後,將粉末與之 Kenolube®混合及將樣品在800百萬巴斯卡下壓緊,並在 400 °C下的氮氣中加熱處理30分鐘。以相同的鹼粉末製備 參考用粉末,但是,未將MgO加入酸性水溶液中。
O:\63\63653.ptc 第11頁 2001.06.12.011 459253 五、發明說明(8) 物質 熱處理 CC) 密度 (公克/立方公尺) 在1千赫茲 之μ ϋμ% (10-100 千赫茲)% ϋμ°/〇 (10-500 千赫茲:)% 參考用 400°C, Nz 7,29 77 2,4 22 0.06% MgO 400°C, Nz 7,31 79 1,5 14 顯然新M g絕緣之粉末之頻率安定性具有優越 Ί王 表1 實施例2 本實施例企圖例證增加Mg量對以SEM偵測在!千赫兹下之 滲透性及Dy%,即以1〇千赫茲千赫茲為範圍之頻率安 定性的影響。 將所有的樣品在800百萬巴斯卡下壓緊及在4〇〇。〇下之氮 氣中加熱30分鐘。 可自圖2及3輕易看出在絕緣層中的Mg量會使獲得改良之 特性在有限的範圍内。 實施例3 本實施例企圖例證不同的顆粒尺寸對磁性特性之影響。 將所有根據本實施例之樣品以加入〇. 〇6% Mg〇使表面曰絕 們,1^粉末的製備作用之後,加入0.5% Kenolube®形式之 ::训。將樣品在8 0 0百萬巴斯卡下壓緊及在 軋中加熱30分鐘。 繫缏下Γ f 2例產不同的顆粒尺寸對在1千赫茲下之滲透性 1 :在10千赫兹」ια°千赫兹及10千赫兹-wo千赫 紅間隔之頻率安定性。 .
第12頁 459253 五、發明說明(9) 物質 顆粒尺寸 微米 (公克/立方 公尺) 在1千赫 茲之μ --rz- ϋμ% (10-100 千赫茲)% Ομ% (10-500 千赫茲)% 以重量計 Mg°/〇 粉末鐵 400-150 粉末鐵 士她 <150 1 >η〇 ^ λ-- 77 12,8 48 0.024 75 1,4 13,2 0.030 海綿鐵 </j <150 7,2(J —_~--- 74 0,4 3,2 0.025 7,22 83 0,7 7,9 0.08 實施例4 本實施例企圖例證在不同的溫度 理對磁性特性之影響 將兩個鐵鹼粉末以含Mg溶液塗佈,以達 Π 01¾ Urr ® . - J 很據 SEM 分析 之U. Ul% Mg置。加入〇· 5% Kenolube®潤滑劑 丨 8 00百萬巴斯卡下壓緊,並在從3〇〇。〇至8〇〇 字樣品在 氮氣中加熱處理。 之空氣或 可在圖4中觀察在1千赫茲下對滲透性的處理參 5申揭示在1 〇 -5 0 0千赫茲間隔之頻率安定性的^^響響及在圖
Claims (1)
- 459253 __索號 89106626 巧^^年心 ----赶-—;_ 六、申請專利範圍 1. 一種絕緣的軟磁性粉末之製儀方法’其包含步驟 將軟磁性鐵驗粉末之顆粒與酸性水絕緣層成形溶液混 合,其中已將介於每公斤鐵粉末0.15至3公克之Mg0量溶 解; 將獲得的混—合物乾燥’以獲得到在顆粒表面上含靜電 絕緣鎂之層。 2. 根據申請專利範圍第1項之方法’其中絕緣層成形溶 液基本上不含防銹劑、硼酸及/或界面活性劑’如全氟烷 基界面活性劑、烧基苯續酸界面活性劑、兩性.界面活性劑 及聚酯界面活性劑。3. 根據申請專利範圍第1或第2項之方法’其中已將 溶解在磷酸及水中製備溶劑。 - 4. 根據申請專利範圍第1項之方法’其中驗粉末具有 於4 0 0微米之平均顆粒尺寸,以小於1 5 0微米較佳。、 小 5 ·根據申請專利範圍第1項之方法,其中鹼粉丈| 是純鐵粉末。 不基本上 6 ‘根據申請專利範圍第1項之方法,其中鹼粉末是7〜 化鐵粉末或海绵鐵粉末。 & $粉 7. —種基本上由純的鐵驗粉末组成之粉末顆教, 含Mg之靜電絕緣層,其中在粉末是水粉化鐵粉末時,、具有 量以介於0. 0 08至0. 1重量%之間變化,如粉末县也& ’則k時,則Mg量以介於0 . 0 5 9至0 · 1 5 1重量%之間變化, 啊不 粒基本上不含防銹劑、硼酸及/或界面活性劑,如&末顆 基界面活性劑、烷基苯磺酸界面活性劑、兩性!工氣燒 介面活性劑459253 _案號89106626 qc?年6月(3曰 修正_ 六、申請專利範圍 及聚醋界面活性劑。 8 · —種基本上由純的鐵驗粉末組成之粉末顆粒,其具有 含Mg之靜電絕緣層,其中以SEM分析偵測在關於水粉化鐵 粉末之顆粒表面上之Mg量是介於0 . 0 4至2 . 6 %之間。 9. 一種自根據'申請專利範圍第7或第8項定義之粉末製備 壓縮之軟磁性粉末核心之方法,其包含步驟 : 可視需要將獲得的絕緣粉末與潤滑劑及/或熱固性或 熱塑性樹脂混合; 將獲得的混合物以3 0 0至1 5 0 0百萬巴斯卡之間的壓力 壓緊; 將壓緊之實體在惰性或氧化氣體中加熱至介於1 0 0至 -7 5 0 °C之間經介於約5至約6 0分鐘之間的時間;及 將退火的實體冷卻。 1 0.根據申請專利範圍第9項之方法,其中加熱是在單一 步驟中進行。 1 1.根據申請專利範圍第9或第1 0項中任一項之方法,其 中加熱是在惰性氣體中進行,如氮氣。O:\63\63653.ptc 第2頁 2001.06.12.016
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CN1272810C (zh) * | 2001-10-29 | 2006-08-30 | 住友电工烧结合金株式会社 | 复合磁性材料及其制造方法 |
SE0203168D0 (sv) * | 2002-10-25 | 2002-10-25 | Hoeganaes Ab | Heat treatment of iron-based components |
WO2006011949A2 (en) * | 2004-06-24 | 2006-02-02 | University Of Delaware | High frequency soft magnetic nanocompsites |
EP1808242B1 (en) * | 2004-09-06 | 2012-12-26 | Diamet Corporation | METHOD FOR PRODUCING SOFT MAGNETIC METAL POWDER COATED WITH Mg-CONTAINING OXIDIZED FILM AND METHOD FOR PRODUCING COMPOSITE SOFT MAGNETIC MATERIAL USING SAID POWDER |
JP4863628B2 (ja) * | 2004-09-06 | 2012-01-25 | 株式会社ダイヤメット | Mg含有酸化膜被覆軟磁性金属粉末の製造方法およびこの粉末を用いて複合軟磁性材を製造する方法 |
JP4761836B2 (ja) * | 2005-01-25 | 2011-08-31 | 株式会社ダイヤメット | Mg含有酸化膜被覆鉄粉末 |
JP5027390B2 (ja) * | 2005-03-28 | 2012-09-19 | 株式会社ダイヤメット | 堆積膜被覆鉄粉末 |
EP2502689B8 (en) * | 2005-01-25 | 2014-06-11 | Diamet Corporation | Iron powder coated with Mg-containing oxide film |
JP4761835B2 (ja) * | 2005-01-25 | 2011-08-31 | 株式会社ダイヤメット | Mg含有酸化膜被覆鉄粉末 |
JP4748772B2 (ja) * | 2005-05-16 | 2011-08-17 | 株式会社ダイヤメット | 酸化膜被覆鉄粉末およびその製造方法 |
PL1899994T3 (pl) * | 2005-06-15 | 2018-01-31 | Hoeganaes Ab | Magnetycznie miękkie materiały kompozytowe |
JP4134111B2 (ja) * | 2005-07-01 | 2008-08-13 | 三菱製鋼株式会社 | 絶縁軟磁性金属粉末成形体の製造方法 |
GB2430682A (en) * | 2005-09-30 | 2007-04-04 | Univ Loughborough | Insulated magnetic particulate material |
CN101681709B (zh) | 2006-12-07 | 2013-04-10 | 霍加纳斯股份有限公司 | 软磁性粉末 |
BR112013016025B1 (pt) | 2010-12-23 | 2021-09-21 | Hõganãs Ab (Publ) | Pó compósito à base de ferro, componente compactado e tratado pelo calor, seu método de produção e núcleo de induto |
EP2509081A1 (en) | 2011-04-07 | 2012-10-10 | Höganäs AB | New composition and method |
WO2015092002A1 (en) | 2013-12-20 | 2015-06-25 | Höganäs Ab (Publ) | Soft magnetic powder mix |
EP3083106A1 (en) | 2013-12-20 | 2016-10-26 | Höganäs Ab (publ) | Soft magnetic composite powder and component |
EP3199264A1 (en) | 2016-02-01 | 2017-08-02 | Höganäs Ab (publ) | New composition and method |
JP6926419B2 (ja) | 2016-09-02 | 2021-08-25 | Tdk株式会社 | 圧粉磁心 |
EP3576110A1 (en) | 2018-05-30 | 2019-12-04 | Höganäs AB (publ) | Ferromagnetic powder composition |
US11804317B2 (en) * | 2019-07-31 | 2023-10-31 | Tdk Corporation | Soft magnetic metal powder and electronic component |
JP7447640B2 (ja) * | 2020-04-02 | 2024-03-12 | セイコーエプソン株式会社 | 圧粉磁心の製造方法および圧粉磁心 |
KR102237022B1 (ko) | 2020-08-07 | 2021-04-08 | 주식회사 포스코 | 연자성 철계 분말 및 그 제조방법, 연자성 부품 |
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GB1046241A (en) | 1961-08-31 | 1966-10-19 | Secr Defence | Improvements in the production of iron powder having high electrical resistivity |
DE3439397A1 (de) | 1984-10-27 | 1986-04-30 | Vacuumschmelze Gmbh, 6450 Hanau | Verfahren zur pulvermetallurgischen herstellung eines weichmagnetischen koerpers |
DE3668722D1 (de) | 1985-06-26 | 1990-03-08 | Toshiba Kawasaki Kk | Magnetkern und herstellungsverfahren. |
US5160447A (en) | 1988-02-29 | 1992-11-03 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Compressed powder magnetic core and method for fabricating same |
JPH06132109A (ja) * | 1992-09-03 | 1994-05-13 | Kobe Steel Ltd | 高周波用圧粉磁心及びその製造方法 |
JP2710152B2 (ja) * | 1993-03-08 | 1998-02-10 | 株式会社神戸製鋼所 | 高周波用圧粉磁心及びその製造方法 |
SE9401392D0 (sv) | 1994-04-25 | 1994-04-25 | Hoeganaes Ab | Heat-treating of iron powders |
JPH08269501A (ja) * | 1995-03-30 | 1996-10-15 | Kobe Steel Ltd | 高周波圧粉磁心および高周波圧粉磁心用鉄粉とそれらの製造方法 |
DE69717718T2 (de) | 1996-05-28 | 2003-11-13 | Hitachi Powdered Metals Co., Ltd. | Weichmagnetischer Pulververbund-Kern aus Teilchen mit isolierenden Schichten |
SE9702744D0 (sv) | 1997-07-18 | 1997-07-18 | Hoeganaes Ab | Soft magnetic composites |
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