CN113149630B - 一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 - Google Patents
一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 Download PDFInfo
- Publication number
- CN113149630B CN113149630B CN202110378103.1A CN202110378103A CN113149630B CN 113149630 B CN113149630 B CN 113149630B CN 202110378103 A CN202110378103 A CN 202110378103A CN 113149630 B CN113149630 B CN 113149630B
- Authority
- CN
- China
- Prior art keywords
- stage
- partial pressure
- oxygen partial
- mnzn ferrite
- temperature
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- 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
- H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
- H01F1/0311—Compounds
- H01F1/0313—Oxidic compounds
- H01F1/0315—Ferrites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3239—Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3256—Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3294—Antimony oxides, antimonates, antimonites or oxide forming salts thereof, indium antimonate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
- C04B2235/6584—Oxygen containing atmosphere, e.g. with changing oxygen pressures at an oxygen percentage below that of air
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6583—Oxygen containing atmosphere, e.g. with changing oxygen pressures
- C04B2235/6585—Oxygen containing atmosphere, e.g. with changing oxygen pressures at an oxygen percentage above that of air
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Magnetic Ceramics (AREA)
Abstract
一种高磁导率高Bs高Tc的MnZn铁氧体材料,属于铁氧体材料制备技术领域。包括主料和掺杂剂,主料:51.5~53.5mol%Fe2O3、16~21mol%ZnO、25.5~32.5mol%MnO,掺杂剂:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5,0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3。本发明得到的MnZn铁氧体兼具高μi(≥10000)、高Bs(≥500mT)以及高Tc(≥160℃)。
Description
技术领域
本发明属于铁氧体材料制备技术领域,具体涉及一种高磁导率(μi)、高饱和磁感应强度(Bs)、高居里温度(Tc)的MnZn铁氧体材料及其制备方法。
背景技术
MnZn铁氧体材料是现代电子信息产业的关键性支撑材料,广泛应用于开关电源、变压器、电感器、计算机OA设备、电力系统、消费电子、绿色照明以及新能源等领域。随着5G通讯的快速发展,各种电子设备和器件不断向小型化、集成化、轻量化、高稳定性的方向发展,这就要求应用在其中的MnZn铁氧体材料具备高磁导率(μi)、高饱和磁感应强度(Bs)以及高居里温度(Tc),高μi高 Bs能够分别提高电子设备和器件的电感值和功率密度,实现小型化、集成化和轻量化;而高Tc能够使电子设备和器件工作在较高的温度范围内,提高了器件应用的可靠性、稳定性。因此开发一种兼具高μi高Bs高Tc的MnZn铁氧体材料具有非常广阔的应用前景和重要的现实意义。
由于兼具高μi高Bs高Tc的MnZn铁氧体材料具有广阔的应用前景,近年来,已成为磁材料产业界关注的热点。对于磁导率10000的MnZn铁氧体材料,国内外产品众多,如横店东磁(DMEGC)的R10K材料,磁导率10000±30%(25℃, 10kHz,B<0.25mT),饱和磁感应强度400mT(25℃,50Hz,1194A/m),居里温度≥120℃;天通磁材(TDG)TS10材料,磁导率10000±30%(25℃,10kHz, B<0.25mT),饱和磁感应强度380mT(25℃,1194A/m),居里温度≥125℃;江益磁材(JPMF)JPH-10材料,磁导率10000±25%(25℃,10kHz,B<0.25mT),饱和磁感应强度420mT(25℃,1194A/m),居里温度≥120℃;TDK公司H5C2 材料,磁导率10000±30%(25℃,10kHz,10mV),饱和磁感应强度400mT(25℃, 1194A/m),居里温度≥120℃;原EPCOS公司T38材料,磁导率10000±30%(25℃, 10kHz,10mV),饱和磁感应强度430mT(25℃,1200A/m),居里温度>130℃; Ferroxcube公司3E10材料,磁导率10000±20%(25℃,10kHz,B<0.25mT),饱和磁感应强度460mT(25℃,1200A/m),居里温度≥130℃。此外,对于已公开的相关高磁导率MnZn铁氧体材料的专利也很多,如:日本专利JP2010120808A 公开了“MnZnフェライト、及びその製造方法”(MnZn铁氧体及其制造方法<翻译>),主料采用52.0~53.0mol%Fe2O3,19.0~23.5mol%ZnO,余量为MnO,掺杂剂采用0.002~0.025wt%SiO2,0.01~0.07wt%CaO,0.01~0.08wt%Bi2O3, 0.01~0.5wt%Sb2O5,0.02~0.3wt%MoO3,由此得到了μi≥12000(f=1kHz),但没有给出饱和磁感应强度和居里温度值。中国专利公开号为CN101259999A的“高磁导率软磁铁氧体材料及其制造方法”,主料采用50.0~56.0mol%Fe2O3, 20.0~26.0mol%ZnO,23.0~27.0mol%MnO,掺杂剂MoO3小于0.12wt%,Bi2O3小于0.15wt%,Nb2O5在0.01~0.1wt%之间,获得的样品μi≥9700(f=10kHz),居里温度Tc=135℃;专利公开号为CN104387050A的“一种高磁导率锰锌系铁氧体及其制备方法”,主料采用52.0~53.0mol%Fe2O3,20.0~22.0mol%ZnO, 25.0~28.0mol%MnO,掺杂剂采用0~0.025wt%CaO,0.01~0.07wt%Bi2O3, 0.01~0.1wt%MoO3,0~0.03wt%Nb2O5,0~0.04wt%Ti2O5,由此获得的样品μi≥ 12000(f=10kHz),Bs≥450mT,Tc=133℃。
由以上国内外典型磁性材料公司的相关产品以及已公开的相关专利,可以看出,以上产品和专利都不能同时兼顾磁导率μi≥10000,饱和磁感应强度Bs≥ 500mT,居里温度Tc≥160℃。
发明内容
本发明的目的在于,针对背景技术存在的现有MnZn铁氧体材料无法同时满足高μi(≥10000)、高Bs(≥500mT)以及高Tc(≥160℃)的技术难题,提出了一种兼具高μi、高Bs及高Tc特性的MnZn铁氧体材料及其制备方法。
本发明的核心思想是:MnZn铁氧体属于尖晶石立方晶系,居里温度依赖于磁性离子在A、B次晶格中的分布状态,即取决于A-B间超交换作用。本发明主料(主配方)采用富铁配方,构建A-B间强超交换作用,首先通过XRD Rietveld 精修确定离子在A、B次晶格中的占位,然后由离子占位计算布里渊函数明确分子场系数,进而推导出分子场系数与主料(主配方)之间的关系,获得居里温度表达式,最终获得主料(主配方)的大致范围。
磁导率、饱和磁感应强度,很大程度上依赖材料的低磁化阻力(aK1+bλs) 和高磁化动力(μ0HMs)间的平衡,而饱和磁感应强度Bs与饱和磁化强度Ms成正相关,与材料的离子占位密切相关,提高材料Bs,相应的也就增大了磁化动力。1)主料方面,适当调整非磁性离子(Zn2+)浓度,稀释或冲淡材料的磁各向异性,构建低磁化阻力的材料配方体系,提高磁导率,同时调控磁性离子和非磁性离子在亚晶格中的占位分布,增大材料的总磁矩,从而提高饱和磁感应强度; 2)掺杂剂方面,掺杂剂采用多种高低熔点复合掺杂技术,利用Cu2V2O7、Bi2O3、 Sb2O5、P2O5、Nb2O5、MoO3等掺杂剂的促晶和阻晶双重作用,严格调控其微结构演化过程中的阻力和动力关系,提高材料磁导率、饱和磁感应强度等特性;3) 烧结工艺方面,采用二次还原烧结技术,调节烧结过程的氧分压含量,调控其微结构演化过程中的阻力和动力关系,实现晶粒均匀致密化,提高材料密度,从而提高材料的饱和磁感应强度。
本发明所要解决的技术问题是,提供一种高磁导率(25℃,10kHz,B<0.25mT,μi≥10000)、高饱和磁感应强度(25℃,1kHz,1194A/m,Bs≥500mT)以及高居里温度(Tc≥160℃)的MnZn铁氧体材料及其制备方法。
本发明解决上述问题采用的技术方案如下:
一种高磁导率高Bs高Tc的MnZn铁氧体材料,其特征在于,包括主料和掺杂剂,所述主料包括:51.5~53.5mol%Fe2O3、16.0~21.0mol%ZnO、 25.5~32.5mol%MnO,其中,所述MnO为高比表面积,比表面积为10~15m2/g;
所述掺杂剂以预烧反应后的主料的质量为参照基准,按重量百分比,以氧化物计算,掺杂剂包括:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5,0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3。
一种高磁导率高Bs高Tc的MnZn铁氧体材料的制备方法,其特征在于,包括以下步骤:
步骤1、预烧料制备:
1.1以Fe2O3、ZnO和MnO作为原料,按照主料:51.5~53.5mol%Fe2O3、 16.0~21.0mol%ZnO、25.5~32.5mol%MnO的比例称取原料,然后进行一次球磨0.5~5h;
1.2将步骤1.1得到的一次球磨料烘干、过筛后,在750~1000℃温度下预烧0.5~3h,随炉冷却至室温后,取出,得到预烧料;
步骤2、掺杂:
以步骤1得到的预烧料为参照基准,以氧化物计算,按重量百分比加入以下掺杂剂:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5,0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3,然后进行二次球磨1~6h,粉体粒度控制在0.7~0.9μm之间;
步骤3、成型:
将步骤2得到的二次球磨料按重量比加入5~12wt%的有机粘合剂,混合、造粒后,压制得到生坯;
步骤4、烧结:
将步骤3得到的生坯进行分阶段烧结处理,得到所述MnZn铁氧体材料:
第一阶段:从50℃升温到600~700℃,氧分压为21%,升温速率为1.5~2.5℃ /min,该阶段为增强排胶阶段;
第二阶段:继续升温到890~950℃,氧分压为21%,升温速率为1.3~3.0℃/min,该阶段为标准排胶阶段;
第三阶段:继续升温到保温温度,保温温度在1360~1410℃之间,氧分压为 0.005~0.1%,升温速率为1.5~3.0℃/min,该阶段为二次还原气氛烧结;
第四阶段:保温阶段,共计5h,前2h氧分压为6~7%,后3h氧分压为4~5%,该阶段同样控制Fe2+含量;
第五阶段:降温阶段,包括:1)保温温度~1250℃,氧分压为2~3%,降温速率为1.25~2.5℃/min;2)1250~1150℃,氧分压为0.1~0.4%,降温速率为1.5~2.5℃ /min;3)1150~50℃,氧分压为0~0.005%,降温速率为1.25~2.0℃/min。
本发明提供的一种高磁导率高Bs高Tc的MnZn铁氧体材料,主料中的MnO 为高比表面积高纯度的MnO,比表面积为10~15m2/g,增大了粉料接触面积,有助于在较低的温度下促进固相反应,保持较高的粉料活性;同时,主料中的ZnO 含量较低(最低为16.0mol%),能够增强超交换作用,提高材料居里温度。掺杂剂采用Cu2V2O7与Bi2O3、Sb2O5、P2O5、Nb2O5、MoO3,Cu2V2O7与其他掺杂剂的促晶与阻晶的双重协同作用,精确调控其微结构演化过程中的阻力和动力关系,提高材料的磁导率、饱和磁感应强度等性能。在制备过程中,采用二次还原烧结技术,精确控制不同阶段的氧分压,并且在保温阶段分别采用两种不同的氧分压,调控Fe2+含量,获得高性能的铁氧体材料。
与现有技术相比,本发明的有益效果为:
1、本发明提供的MnZn铁氧体材料的居里温度Tc≥160℃,能够适应绝大部分工作环境,提高了电子设备和器件的应用可靠性。
2、本发明MnZn铁氧体材料的磁导率μi和饱和磁感应强度Bs,同时满足μi≥10000,Bs≥500mT,能够进一步提高电子设备和器件的集成化、轻量化和小型化。
3、本发明通过对主配方和掺杂剂的精准调控,使得烧结样品的良品率大于 90%,即烧结样品满足高磁导率(25℃,10kHz,B<0.25mT,μi≥10000)、高饱和磁感应强度(25℃,1kHz,1194A/m,Bs≥500mT)以及高居里温度(Tc≥160℃),节约了生产成本。
附图说明
图1为本发明提供的一种高磁导率高Bs高Tc的MnZn铁氧体材料的制备工艺流程图;
图2为实施例1制得的MnZn铁氧体材料的磁滞回线图;
图3为实施例1制得的MnZn铁氧体材料的磁导率-温度关系图。
具体实施方式
下面结合附图和实施例,详述本发明的技术方案。
一种高磁导率高Bs高Tc的MnZn铁氧体材料的制备方法,包括以下步骤:
步骤1、预烧料制备:
1.1以Fe2O3、ZnO和MnO作为原料,按照主料:51.5~53.5mol%Fe2O3、 16.0~21.0mol%ZnO、25.5~32.5mol%MnO的比例称取原料;
1.2将步骤1.1称取的原料放入球磨机内,加入去离子水,进行一次球磨,球磨介质为高强度氧化锆球或钢球,球磨时间为0.5~5h;
1.3将步骤1.2得到的一次球磨料在烘箱中烘干,烘箱温度为70~90℃,然后在750~1000℃温度下预烧0.5~3h,随炉冷却至室温后,取出,得到预烧料;
步骤2、掺杂:
2.1以步骤1得到的预烧料为参照基准,以氧化物计算,按重量百分比加入以下掺杂剂:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5, 0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3;
2.2步骤2.1得到的混合粉料放入球磨机内,加入去离子水,进行二次球磨,球磨介质为高强度氧化锆球或钢球,球磨时间为1~6h,使粉料的粒度控制在0.70μm≤D50≤0.90μm;
步骤3、成型:
将步骤2得到的二次球磨料按重量比加入5~12wt%的有机粘合剂,混合、造粒后,在压机上将造粒后的粒状粉料压制成环形生坯;
步骤4、烧结:
将步骤3得到的环形生坯置于自动控制气氛钟罩炉内,进行分阶段烧结处理:
第一阶段:从50℃升温到600~700℃,氧分压保持在21%,升温速率为1.5~2.5℃/min,该阶段为增强排胶阶段;
第二阶段:从第一阶段最终温度升温到890~950℃,氧分压保持在21%,升温速率为1.3~3.0℃/min,该阶段为标准排胶阶段,缓慢升温,防止快速升温排胶而导致的气孔率增大;
第三阶段:从第三阶段最终温度升温到1360~1410℃,氧分压保持在 0.005~0.1%,升温速率为1.5~3.0℃/min,该阶段为二次还原气氛烧结,通过控制 Fe2+含量,使得磁晶各向异性常数K1和磁致伸缩系数λs接近0,以获得高磁导率;
第四阶段:保温阶段,在1360~1410℃下保温5h,前2h氧分压为6~7%,后3h氧分压为4~5%,该阶段同样控制Fe2+含量;
第五阶段:降温阶段,降温阶段对高导MnZn铁氧体性能的影响至关重要,本发明降温阶段分为:1)保温温度降至1250℃,氧分压保持在2~3%,降温速率为1.25~2.5℃/min;2)1250降至1150℃,氧分压保持在0.1~0.4%,降温速率为1.5~2.5℃/min;3)1150降至50℃,氧分压保持在0~0.005%,降温速率为 1.25~2.0℃/min。
步骤5、测试:
对步骤4得到的样品进行电磁性能测试;
采用同惠TH2826精密LCR测试仪测试样品的电感L,适当调整绕线两端电压值U,使其满足:U=4.44fNBAe(B<0.25mT),样品的起始磁导率其中L为样品的电感值,单位H,N为绕线匝数,h为样品厚度,D为样品外径,d为样品内径,Ae为样品的有效截面积。测试条件为:频率f=10kHz,磁通密度峰值B<0.25mT,典型值10kHz,10mV。结合温控箱得出μi-T曲线图,使用外延法确定居里温度Tc。
采用IWATSU SY-8232B-H分析仪测试样品的饱和磁感应强度Bs,测试条件:频率f=1kHz,外场H=1194A/m,温度T=25℃。
实施例
一种高磁导率高Bs高Tc的MnZn铁氧体材料的制备方法,包括以下步骤:
1)配方
实施例1-4及对比例1-2主配方见下表:
实施例 | Fe<sub>2</sub>O<sub>3</sub>(mol%) | ZnO(mol%) | MnO(mol%) |
实施例1 | 52.0 | 16.5 | 31.5 |
实施例2 | 52.8 | 20.5 | 26.7 |
实施例3 | 53.5 | 19.0 | 27.5 |
实施例4 | 53.5 | 21.0 | 25.5 |
对比例1 | 52.0 | 16.5 | 31.5 |
对比例2 | 52.5 | 21.5 | 26.0 |
2)一次球磨
将步骤1)实施例1-4及对比例1-2中的料粉分别放入不同的球磨机内,加入去离子水,球磨混合均匀,球磨介质为高强度钢球,球磨时间为2小时;
3)预烧
将步骤2)所得球磨料在烘箱中烘干,烘箱温度85℃,将烘干料在800℃下预烧2小时;
4)掺杂
以步骤3)所得料粉为参照基准,以氧化物计算,按重量百分比加入以下掺杂剂:
5)二次球磨
将步骤4)中加入掺杂剂的料粉分别放入不同的球磨机内,加入去离子水,球磨混合均匀,球磨介质为高强度钢球,球磨时间4小时,使粉料的粒度控制在 0.75μm≤D50≤0.80μm;
6)成型
将步骤5)所得料粉按重量比加入12wt%的有机粘合剂,混合,造粒后,在压机上将造粒后的粒状粉料压制成环形生坯;
7)气氛烧结
将步骤6)所得环形生坯置于自动控制气氛钟罩炉内。按以下烧结工艺烧结:
第一阶段:50~600℃,氧分压为21%,升温速率为2℃/min,该阶段为增强排胶阶段;
第二阶段:600~893℃,氧分压为21%,升温速率为1.3℃/min,该阶段为标准排胶阶段,缓慢升温,减小因快速升温排胶而增大气孔率;
第三阶段:893~1380℃,氧分压为0.1%,升温速率为2℃/min,该阶段为二次还原气氛烧结,通过控制Fe2+含量,使得磁晶各向异性常数K1和磁致伸缩系数λs接近0,以获得高磁导率;
第四阶段:保温温度1380℃保温5h,前2h氧分压为6%,后3h氧分压为 5%,该阶段同样控制Fe2+含量;
第五阶段:降温阶段,降温阶段对高导MnZn铁氧体性能的影响至关重要,本发明降温阶段包括三部分:1)1380~1250℃,氧分压为3%,降温速率为1.25℃ /min;2)1250~1150℃,氧分压为0.2%,降温速率为1.67℃/min;3)1150~50℃,氧分压为0.005%,降温速率为1.25℃/min。
经过以上步骤制备的高磁导率高Bs高Tc MnZn铁氧体材料的性能如下表:
实施例1-3及对比例1-2测试结果如下:
Claims (2)
1.一种高磁导率高Bs高Tc的MnZn铁氧体材料,其特征在于,包括主料和掺杂剂,所述主料包括:51.5~53.5mol%Fe2O3、16.0~21.0mol%ZnO、25.5~32.5mol%MnO,其中,所述MnO的比表面积为10~15m2/g;
按重量百分比,以氧化物计算,所述掺杂剂包括:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5,0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3。
2.一种高磁导率高Bs高Tc的MnZn铁氧体材料的制备方法,其特征在于,包括以下步骤:
步骤1、预烧料制备:
1.1以Fe2O3、ZnO和MnO作为原料,按照主料:51.5~53.5mol%Fe2O3、16.0~21.0mol%ZnO、25.5~32.5mol%MnO的比例称取原料,然后进行一次球磨0.5~5h;
1.2将步骤1.1得到的一次球磨料烘干、过筛后,在750~1000℃温度下预烧0.5~3h,随炉冷却至室温后,取出,得到预烧料;
步骤2、掺杂:
以步骤1得到的预烧料为参照基准,以氧化物计算,按重量百分比加入以下掺杂剂:0.001~0.05wt%Cu2V2O7,0.001~0.05wt%Bi2O3,0.001~0.05wt%Sb2O5,0.001~0.08wt%P2O5,0.001~0.05wt%Nb2O5,0.001~0.1wt%MoO3,然后进行二次球磨1~6h,粉体粒度控制在0.7~0.9μm之间;
步骤3、成型:
在步骤2得到的二次球磨料中加入有机粘合剂,混合、造粒后,压制得到生坯;
步骤4、烧结:
将步骤3得到的生坯进行分阶段烧结处理,得到所述MnZn铁氧体材料:
第一阶段:从50℃升温到600~700℃,氧分压为21%;
第二阶段:继续升温到890~950℃,氧分压为21%;
第三阶段:继续升温到保温温度,保温温度在1360~1410℃之间,氧分压为0.005~0.1%;
第四阶段:保温阶段,共计5h,前2h氧分压为6~7%,后3h氧分压为4~5%;
第五阶段:降温阶段,包括:1)保温温度~1250℃,氧分压为2~3%;2)1250~1150℃,氧分压为0.1~0.4%;3)1150~50℃,氧分压为0~0.005%。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110378103.1A CN113149630B (zh) | 2021-04-08 | 2021-04-08 | 一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110378103.1A CN113149630B (zh) | 2021-04-08 | 2021-04-08 | 一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113149630A CN113149630A (zh) | 2021-07-23 |
CN113149630B true CN113149630B (zh) | 2022-11-08 |
Family
ID=76889101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110378103.1A Active CN113149630B (zh) | 2021-04-08 | 2021-04-08 | 一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113149630B (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113956028B (zh) * | 2021-11-25 | 2023-03-17 | 横店集团东磁股份有限公司 | 一种高温低损耗MnZn功率铁氧体及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004028997A1 (ja) * | 2002-09-26 | 2004-04-08 | Tdk Corporation | フェライト材料 |
CN101259999A (zh) * | 2008-03-31 | 2008-09-10 | 横店集团东磁股份有限公司 | 高磁导率软磁铁氧体材料及其制造方法 |
CN101412621A (zh) * | 2008-10-23 | 2009-04-22 | 电子科技大学 | 高磁导率高饱和磁感应强度MnZn铁氧体材料及其制备方法 |
CN101859621A (zh) * | 2009-04-08 | 2010-10-13 | 广东江粉磁材股份有限公司 | 一种高磁导率MnZn铁氧体材料及其制造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6773619B2 (en) * | 2001-07-17 | 2004-08-10 | Tdk Corporation | Magnetic core for transformer, Mn-Zn based ferrite composition and methods of producing the same |
-
2021
- 2021-04-08 CN CN202110378103.1A patent/CN113149630B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004028997A1 (ja) * | 2002-09-26 | 2004-04-08 | Tdk Corporation | フェライト材料 |
CN101259999A (zh) * | 2008-03-31 | 2008-09-10 | 横店集团东磁股份有限公司 | 高磁导率软磁铁氧体材料及其制造方法 |
CN101412621A (zh) * | 2008-10-23 | 2009-04-22 | 电子科技大学 | 高磁导率高饱和磁感应强度MnZn铁氧体材料及其制备方法 |
CN101859621A (zh) * | 2009-04-08 | 2010-10-13 | 广东江粉磁材股份有限公司 | 一种高磁导率MnZn铁氧体材料及其制造方法 |
Non-Patent Citations (1)
Title |
---|
CuO 和V2O5 对MnZn 功率铁氧体性能的影响;刘娅;《压电与声光》;20110831;第33卷(第4期);第623-627页 * |
Also Published As
Publication number | Publication date |
---|---|
CN113149630A (zh) | 2021-07-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113087512B (zh) | 高频率稳定性高磁导率的MnZn铁氧体材料及制备方法 | |
TWI722151B (zh) | 錳鋅系鐵氧體的製造方法及錳鋅系鐵氧體 | |
CN108530050B (zh) | 宽温低损耗高阻抗MnZn软磁铁氧体材料及制备方法 | |
CN108558383B (zh) | NiZn铁氧体材料及制备方法 | |
CN102751065B (zh) | 宽温宽频低损耗MnZn功率铁氧体材料及其制备方法 | |
CN108275994B (zh) | 宽温低功耗高直流叠加特性锰锌铁氧体及其制备方法 | |
CN112430080A (zh) | 一种高功率和高剩磁比的石榴石铁氧体材料及其制备方法 | |
CN108610037B (zh) | 一种宽温高叠加高居里温度的锰锌高磁导率材料及其制备方法 | |
CN108863339B (zh) | 一种应用于高频大磁场变压器上的宽温低损耗MnZn铁氧体材料 | |
CN103382108B (zh) | 一种低功耗软磁锰锌铁氧体材料及其制备方法 | |
US20070205390A1 (en) | Mn-Zn BASED FERRITE MATERIAL | |
CN114436636A (zh) | 一种差共模电感用高磁导率锰锌铁氧体材料及其制备方法 | |
JP5089963B2 (ja) | MnZnNiフェライトの製造方法 | |
CN113149630B (zh) | 一种高磁导率高Bs高Tc的MnZn铁氧体材料及其制备方法 | |
CN103382104B (zh) | 一种稀土掺杂软磁铁氧体及其制备方法 | |
CN103214233B (zh) | 高T c、宽温超高B s MnZn铁氧体材料及制备方法 | |
JP3588693B2 (ja) | Mn−Zn系フェライトおよびその製造方法 | |
CN109678483A (zh) | 宽温低温度系数低功耗锰锌铁氧体材料的制备方法 | |
CN109678486A (zh) | 一种宽温低温度系数低功耗锰锌铁氧体材料 | |
CN112898007A (zh) | 超富铁高磁通密度的锰锌铁氧体材料及其制备方法和应用 | |
JP3108804B2 (ja) | Mn−Znフェライト | |
CN111116188B (zh) | 一种锰锌高磁导率高居里温度高频高磁通材料及其制备方法 | |
JPH08169756A (ja) | 低損失Mn−Znフェライトコアおよびその製造方法 | |
CN113636838A (zh) | 一种镍锌铁氧体材料及制备方法和应用 | |
JP3790606B2 (ja) | Mn−Coフェライト材料 |
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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |