釤鈷磁鐵

釤鈷磁鐵,是一種稀土磁鐵,是由和其它金屬材料經配比,溶煉成合金,經粉碎、壓型、燒結後制成的一種磁性工具材料,具有高磁能積、極低的溫度系數,最高工作溫度可達350℃,負溫不限,在工作溫度180℃以上時,其最大磁能積(BHmax)、矯頑性coercivity)及溫度穩定性和化學穩定性均超過釹鐵硼永磁材料。具有很強的抗腐蝕和抗氧化性;所以被廣泛應用在航空航天、國防軍工、微波器件、通訊、醫療設備、儀器、儀表、各種磁性傳動裝置、傳感器、磁處理器、電機、磁力起重機等[1]。釤鈷磁鐵的最大磁能積(BHmax)的範圍從16 MGOe到32 MGOe,其理論極限是34 MGOe。 釤鈷磁鐵有兩種組成比,分別為(原子:原子)1:5和2:17[2]

加工

釤鈷磁鐵生產流程:配料 → 熔煉制錠→ 制粉 → 壓型 → 燒結回火 → 磁性檢測 → 磨加工 → 銷切加工 → 成品[1]
這些合金通常在加工非磁化狀態。釤鈷用濕式細研磨(水冷式散熱)和金剛石砂輪。此過程是必需的,如果鑽洞或其他功能的限制。研磨廢物產生一定不能完全乾燥,因為釤鈷具有低燃點。一個小火花的,如生產帶有靜電,可以輕鬆地燃燒。火災產生的溫度會非常高,且難以控制。

危害

  1. 釤鈷磁鐵很容易剝碎。當處理它們時,必須配戴護目鏡
  2. 讓磁鐵撞擊在一起可能導致磁體粉碎,這可能導致潛在危險。
  3. 釤鈷製造由一個被稱為燒結過程,和所有材料燒結而製成,內部非常有可能產生裂縫。磁體不具有機械整體性,只具有製備磁場的功能。因此,必須設計特別機械系統來給予整體系統足夠的機械可靠性。

屬性

1.非常好的矯頑性。
2.良好的溫度穩定性(最高使用溫度為 250至550℃,居里溫度從 700至800℃)。
3.價格昂貴,易受價格波動(鈷市場價格敏感)。

材料特性

以下列舉部分釤鈷磁鐵的參數: [3]

1.密度 :8.4 g/cm³
2.電氣 電阻 :0.8 × 10 -4 Ω·cm
3.熱膨脹係數(垂直軸):12.5 µm/(m·K)
4.磁通密度變化在5%,每100℃溫度變化(範圍 25-250℃)

應用

1.渦輪機構
2.行波管
3.電子手錶[4]
4.擋泥板[5]

參見

資料來源

  1. ^ 1.0 1.1 存档副本. [2011-02-18]. (原始内容存档于2013-10-14). 
  2. ^ 電子能量公司網頁:存档副本. [2016-08-31]. (原始内容存档于2009-08-11). 
  3. ^ Standard Specifications for Permanent Magnet Materials (PDF). MMPA 0100-00. [2011-10-02]. (原始内容存档 (PDF)于2014-07-22). 
  4. ^ Foundations of Materials Science and Engineering, 5e, P.906
  5. ^ Smith, Dan. THE HEART & SOUL OF THE NEW FENDER AMERICAN DELUXE SERIES. The Story of the Samarium Cobalt Noiseless Pickups. Fender. [2007-12-14]. (原始内容存档于2008-01-20). 

Read other articles:

Peta lokasi Munisipalitas Haderslev Munisipalitas Haderslev adalah munisipalitas (Denmark: kommune) di Region Syddanmark di Denmark. Munisipalitas Haderslev memiliki luas sebesar 701.98 km² dan memiliki populasi sebesar 56.414 jiwa. Referensi Municipal statistics: NetBorger Kommunefakta Diarsipkan 2007-08-12 di Wayback Machine., delivered from KMD aka Kommunedata (Municipal Data) Municipal merges and neighbors: Eniro new municipalities map Diarsipkan 2007-10-11 di Wayback Machine. lbsPe...

 

Artikel biografi ini ditulis menyerupai resume atau daftar riwayat hidup (Curriculum Vitae). Tolong bantu perbaiki agar netral dan ensiklopedis.Faisol Izuddin Karimi Komandan Korem 061/Surya Kencana,bogorPetahanaMulai menjabat 29 November 2023 PendahuluAnan NurakhmanPenggantiPetahanaKomandan Grup A PaspampresMasa jabatan4 Oktober 2022 – 29 November 2023 PendahuluAnan NurakhmanPenggantiWimoko Informasi pribadiLahir22 April 1977 (umur 46)Gresik, Jawa TimurKerabatYudomo Sastr...

 

Penjaga Gunung BromoSutradaraKenneth Timothy LeogandaProduserBudhi SutrisnoPemeranJonathan FrizzyImel Putri CahyatiRoger DanuartaAhmad AffandyAfdhal YusmanTatiana SivekVista PutriPenyuntingFabian PahlaviDistributorGenta Buana ParamitaTanggal rilis17 Februari 2010Negara IndonesiaBahasaIndonesia Penjaga Gunung Bromo adalah film laga Indonesia yang dirilis pada 17 Februari 2010 dengan disutradarai oleh Kenneth Timothy Leoganda yang dibintangi oleh Jonathan Frizzy, Imel Putri Cahyati, Roger ...

Archery at the Olympics Women's teamat the Games of the XXIV OlympiadVenueHwarang Archery FieldDates27 September – 1 OctoberCompetitors45 from 15 nationsMedalists Kim Soo-nyungWang Hee-kyungYun Young-sook  South Korea Lilies HandayaniNurfitriyana SaimanKusuma Wardhani  Indonesia Deborah OchsDenise ParkerMelanie Skillman  United States1992 → Part of a series on Archery at the 1988 Summer Olympics Events Individual menwomen Team menwomen vte A total of 15 n...

 

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. (January 2015) (Learn how and when to remove this template message) This article needs additional citations for verification. Please help improve this...

 

State Park in Belgium and Ozaukee counties, Wisconsin Harrington Beach State ParkIUCN category V (protected landscape/seascape)Trail at Harrington Beach State Park.Show map of WisconsinShow map of the United StatesLocationBelgium, Ozaukee, Wisconsin, United StatesCoordinates43°29′32″N 87°48′3″W / 43.49222°N 87.80083°W / 43.49222; -87.80083Area715 acres (289 ha)Established1992Governing bodyWisconsin Department of Natural Resources Harrington Beach ...

2013 British film by Richard Ayoade Not to be confused with The Double (2011 film). The DoubleBritish posterDirected byRichard AyoadeWritten by Richard Ayoade Avi Korine Story byAvi KorineBased onThe Doubleby Fyodor DostoyevskyProduced by Robin C. Fox Amina Dasmal Starring Jesse Eisenberg Mia Wasikowska Wallace Shawn Noah Taylor Cathy Moriarty James Fox CinematographyErik WilsonEdited by Chris Dickens Nick Fenton Music byAndrew HewittProductioncompanies Alcove BFI Film4 Distributed byStudioCa...

 

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: BAC Films – news · newspapers · books · scholar · JSTOR (March 2017) (Learn how and when to remove this template message) BAC FilmsIndustryFilm productionFilm distributionFounded1986FounderJean LabadieHeadquartersParis, Washington D.C., France, United StatesAre...

 

United States historic placeNotre Dame SchoolU.S. National Register of Historic Places Show map of MassachusettsShow map of the United StatesLocationFall River, MassachusettsCoordinates41°41′28″N 71°8′2″W / 41.69111°N 71.13389°W / 41.69111; -71.13389Built1899ArchitectLouis G. DestrempsArchitectural styleColonial RevivalMPSFall River MRANRHP reference No.83000697[1]Added to NRHPFebruary 16, 1983 Notre Dame School is a historic former s...

Private airport near Daytona Beach, FL, US 29°04′49″N 081°02′48″W / 29.08028°N 81.04667°W / 29.08028; -81.04667 Spruce Creek AirportIATA: noneICAO: noneFAA LID: 7FL6SummaryAirport typePrivateOwner/OperatorSpruce Creek Prop. Owners Assoc. Inc.ServesDaytona Beach, FloridaLocationPort Orange, FloridaElevation AMSL24 ft / 7 mCoordinates29°04′49″N 081°02′48″W / 29.08028°N 81.04667°W / 29.08028; -81.04667Websiteh...

 

Computer magazine published until April 1993 Sinclair UserCover from 1987Former editorsApr 1982: John SterlicchiMay '82 - Jan '84: Nigel Clark Feb '84 - May '86: Bill Scolding Jun '86 - Apr '88: David Kelly Mar '88 - May '89: Graham TaylorJun '89 - Nov '90: Jim DouglasDec '90 - Apr '92: Garth SumpterMay '92 - May '93: Alan DykesCategoriesComputer magazinesFrequencyMonthlyCirculation96,000 (July 1984)First issueApril 1982Final issueNumberApril 1993134[1] (133rd issue[2])Company...

 

一中同表,是台灣处理海峡两岸关系问题的一种主張,認為中华人民共和国與中華民國皆是“整個中國”的一部份,二者因為兩岸現狀,在各自领域有完整的管辖权,互不隶属,同时主張,二者合作便可以搁置对“整个中國”的主权的争议,共同承認雙方皆是中國的一部份,在此基礎上走向終極統一。最早是在2004年由台灣大學政治学教授張亞中所提出,希望兩岸由一中各表�...

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: McCandless, Pennsylvania – news · newspapers · books · scholar · JSTOR (January 2014) (Learn how and when to remove this message) Home rule municipality in Pennsylvania, United StatesMcCandless, PennsylvaniaHome rule municipalityTypical suburban street FlagSea...

 

American singer and actor (1917–1995) This article is about the actor and singer. For other uses, see Dean Martin (disambiguation). Dean MartinMartin in 1958BornDino Paul Crocetti(1917-06-07)June 7, 1917Steubenville, Ohio, U.S.DiedDecember 25, 1995(1995-12-25) (aged 78)Beverly Hills, California, U.S.Resting placeWestwood Village Memorial Park CemeteryOther names Dino Dino Martini The King of Cool Occupations Singer actor comedian Years active1932–1995[1]WorksDiscogr...

 

Chinese footballer Chen Jianlong 陈建龙 Personal informationDate of birth (1989-05-14) May 14, 1989 (age 35)Place of birth Maoming, Guangdong, ChinaHeight 1.78 m (5 ft 10 in)Position(s) DefenderYouth career2005–2009 Guangzhou PharmaceuticalSenior career*Years Team Apps (Gls)2007–2009 → Guangdong Sunray Cave (loan) 10 (0)2010–2012 Guangzhou Evergrande 5 (0)2012 → Shanghai Shenxin (loan) 0 (0)2013–2018 Meizhou Kejia 61 (4) *Club domestic league appearances and...

مركز ريع مصيدة الإحداثيات 17°22′29″N 43°04′27″E / 17.37475°N 43.074213888889°E / 17.37475; 43.074213888889   تقسيم إداري  البلد السعودية  التقسيم الأعلى محافظة العيدابي  معلومات أخرى منطقة زمنية ت ع م+03:00  تعديل مصدري - تعديل   ريع مصيدة مركز سعودي يتبع محافظة العيدابي الواقع...

 

Musical instrument This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Fipple – news · newspapers · books · scholar · JSTOR (February 2011) (Learn how and when to remove this message) Mouthpiece of a Catalan recorder The term fipple specifies a variety of end-blown flute that includes the flageolet, recorder, an...

 

КоммунаУччаниUcciani 42°02′42″ с. ш. 8°58′45″ в. д.HGЯO Страна  Франция Регион Корсика Департамент Южная Корсика Кантон Челаво-Меццана Мэр Henri Franceschini(2008–2014) История и география Площадь 28.36 км² Высота центра 259–1628 м Часовой пояс UTC+1:00, летом UTC+2:00 Население Население 450&#...

See also: 1943 Major League Baseball season and 1943 All-American Girls Professional Baseball League season The following are the baseball events of the year 1943 throughout the world. Overview of the events of 1943 in baseball Years in baseball ← 1940 1941 1942 1943 1944 1945 1946 → 1943 in sports Air sports American football Aquatic sports Association football Athletics Australian rules football Badminton Baseball Basketball Canadian football Chess Climbing Combat sports Sumo Cricket 19...

 

Pour les articles homonymes, voir Chino. Chino Vue aérienne de l'aéroport de Chino Administration Pays États-Unis État Californie Comté San Bernardino Maire Dennis Yates Démographie Population 91 403 hab. (2020) Densité 1 190 hab./km2 Géographie Coordonnées 34° 01′ 04″ nord, 117° 41′ 24″ ouest Superficie 7 680 ha = 76,8 km2 Fuseau horaire PST (UTC-8) Divers Fondation 1910 Localisation Carte du comt�...