摘要:
An Mn-Zn ferrite includes base components of 44.0 to 49.8 mol % Fe 2 O 3 , 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn 2 O 3 , and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn-Zn ferrite contains less than 50.0 mol % Fe 2 O 3 and a limited amount (0.8 mol % or less) of Mn 2 O 3 , an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained thereby realizing an excellent soft magnetism in a high frequency band such as 1 MHz.
摘要翻译:Mn-Zn铁氧体包含44.0〜49.8mol%Fe 2 O 3,4.0〜26.5mol%ZnO,0.8mol%以下Mn 2 O 3,余量由MnO构成的基质成分,含有0.20(0.20) 至1.00质量%的CaO作为添加剂。 由于Mn-Zn铁氧体含有少于50.0mol%的Fe 2 O 3和Mn 2 O 3的有限量(0.8mol%以下),即使CaO含量大于0.20质量%,也不会发生异常晶粒生长, 并且可以获得高电阻,从而在诸如1MHz的高频带中实现优异的软磁性。
摘要:
An Mn-Zn ferrite includes base components of 44.0 to 49.8 mol % Fe 2 O 3 , 4.0 to 26.5 mol % ZnO, at least one of 0.1 to 4.0 mol % TiO 2 and SnO 2 , 0.5 mol % or less Mn 2 O 3 , and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn-Zn ferrite contains less than 50 mol % Fe 2 O 3 and a limited amount (0.5 mol % or less) of Mn 2 O 3 , an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained. And, since an appropriate amount of TiO 2 and/or SnO 2 is contained, an initial permeability is kept adequately high, whereby an excellent soft magnetism can be achieved in a high frequency band such as 1 MHz.
摘要:
A ferrite core is provided. This ferrite core has high saturation flux density at a high temperature of 100°C or higher, and in particular, at around 150°C, and has excellent magnetic stability at a high temperature, experiencing reduced deterioration of magnetic properties, and in particular, reduced core loss at such high temperature (even by trading off some improvement in the level of the loss). The ferrite core of the invention contains 56 to 57 mol% of iron oxide calculated in terms of Fe 2 O 3 , 5 to 10 mol% of zinc oxide calculated in terms of ZnO, 3 to 6 mol% of nickel oxide calculated in terms of NiO, and the balance of manganese oxide (MnO) as its main components, and when the main components has a composition represented by the formula: (Zn 2+ a , Ni 2+ b , Mn 2+ c , Mn 3+ d , Fe 2+ e , Fe 3+ f ) O 4+δ (1) wherein a, b, c, d, e and f meet the relations: a + b + c + d + e + f = 3, and δ= a + b + c + (3/2)d + e +(3/2)f - 4 the value of δ in formula (1) is such that: 0 ≤ δ ≤ 0.001.
摘要翻译:提供铁氧体磁芯。 该铁氧体磁心在100℃以上的高温,特别是在150℃附近具有高饱和磁通密度,在高温下的磁稳定性优异,磁特性的劣化少,特别是, 减少在这种高温下的核心损失(即使通过损失水平的一些改进来交换)。 本发明的铁氧体磁心含有以Fe 2 O 3换算的氧化铁56〜57摩尔%,以ZnO换算计为5〜10摩尔%的氧化锌,以NiO换算计为3〜6摩尔%的氧化镍, (Zn2 + a,Ni2 + b,Mn2 + c,Mn3 + d,Fe2 + e,Fe3 + f)O4 +δ(1)表示的组成的氧化锰(MnO)的余量作为主成分, )其中a,b,c,d,e和f满足关系:a + b + c + d + e + f = 3和δ= a + b + c +(3/2)d + e +(3 / 2)f - 4公式(1)中δ的值为:0≤δ≤0.001。
摘要:
A carbon ceramic brake disc (1) according to the present invention includes: a support body (10) having cooling channels (12) at the center portion; and friction layers (20) directly attached to the top and the bottom of the support body (10) without a bonding layer and having components different from the components of the support body (10), in which the support body is composed of a plurality of layers having components similar to the friction layers (20), gradually toward the friction layers from the cooling channels (12) as the center. Accordingly, the support body can perform thermomechanical shock absorbing that is an original function and the friction layers and the support body can be prevented from separating while the carbon ceramic brake disc is manufactured.
摘要:
A ferrite sintered compact, which has a primary composition containing 63 to 80 mole % of Fe2O3, 3 to 15 mole % of ZnO and the balanced amount of manganese oxides, wherein Rcal - 2.0 ≤ R ≤ Rcal + 0.3 is satisfied where Rcal is determined by the formula (1): Rcal = [200(X - 50)]/(3X), where X is a content (mole %) of Fe2O3, and R (%) is a proportion of Fe2+ in the total amount of Fe in the sintered compact, and wherein the sintered compact has a density of 4.9 g/cm3 or more.
摘要:
An Mn-Zn ferrite includes base components of 44.0 to 49.8 mol % Fe 2 O 3 , 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn 2 O 3 , and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn-Zn ferrite contains less than 50.0 mol % Fe 2 O 3 and a limited amount (0.8 mol % or less) of Mn 2 O 3 , an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained thereby realizing an excellent soft magnetism in a high frequency band such as 1 MHz.
摘要:
The invention relates to a method for producing a solid part for forming an entire anode or the part thereof for producing aluminium by igneous electrolyse and comprising a cermet made of at least one type of metal oxide such as a spinel mixed oxide containing a R metal in the form of cations in the chemical structure thereof. Said R metal is entirely or partly reducible by a reducing operation during a production process in such a way that the entire metallic phase or the part thereof is formed. The inventive method makes it possible to obtain a cermet whose metallic phase comprises a homogenous distribution of fine metallic particles.
摘要:
The disclosed subject concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000° C., and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density. This set of characteristics makes this materials particularly suitable for a vast range of applications in the nanotechnology field, such as, for example, nanocoatings, magnetic nanofluids, nanocatalysts, nanosensors, nanopigments, nanoadditives, ultra light nanocomposites, drug release nanoparticles, nanomarkers, nanometric films, etc.
摘要:
W-type ferrite has improved magnetic properties, in particular, coercive force. A high coercive force (HcJ) and a high residual magnetic flux density (Br) can be simultaneously attained by a ferrite magnetic material comprising an oxide having a composition wherein metal elements Sr, Ba and Fe in total have a composition ratio represented by the formula Sr (1-x) Ba x Fe 2+ a Fe 3+ b in which 0.03 ≤ x ≤ 0.80, 1.1 ≤ a ≤ 2.4, and 12.3 ≤ b ≤ 16.1. The ferrite magnetic material can form any of a ferrite sintered magnet, a ferrite magnet powder, a bonded magnet as a ferrite magnet powder dispersed in a resin, and a magnetic recording medium as a film-type magnetic phase. As for the ferrite sintered magnet, there can be attained a fine sintered structure that has a mean grain size of 0.6 µm or less.
摘要翻译:W型铁氧体具有改善的磁特性,特别是矫顽力。 可以通过包含氧化物的铁氧体磁性材料同时获得高矫顽力(HcJ)和高残留磁通密度(Br),其中金属元素Sr,Ba和Fe总计具有由式 Sr(1-x)Ba x Fe 2+ a Fe 3+ b,其中0.03‰¤‰‰0.80,1.1‰¤‰¤2.4和12.3‰‰b‰16.1。 铁氧体磁性材料可以形成铁氧体烧结磁体,铁氧体磁体粉末,作为分散在树脂中的铁氧体磁体粉末的粘结磁体和作为膜型磁性相的磁记录介质中的任何一种。 对于铁氧体烧结磁体,可以获得平均粒径为0.6μm以下的微细烧结体。