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1. 发明授权

US4138236A Method of permanently bonding magnetic ceramics 失效
标题翻译：永久性粘结磁性陶瓷的方法
公开(公告)号：US4138236A
公开(公告)日：1979-02-06
申请号：US858222
申请日：1977-12-07
申请人： Florian Haberey
发明人： Florian Haberey
IPC分类号： C03C8/24 , C04B35/26 , C04B37/00 , C03C27/00
CPC分类号： C04B37/005 , C03C8/24 , C04B35/26 , C04B2237/10 , C04B2237/34 , Y10T29/49057
摘要： A method of bonding hard and/or soft magnetic ferrite parts comprises the steps of applying an oxide glass which contains iron oxide in an amount corresponding to about 50 to about 200% of the iron oxide proportion in the eutectic point of the respective glass-forming multi-component system, about 0.4 to about 0.8 mole percent of a wetting agent selected from the group consisting of SiO.sub.2, P.sub.2 O.sub.5 and B.sub.2 O.sub.3 and about 0.1 to aout 0.4 mole percent of alkali oxides BaO, SrO, CaO, K.sub.2 O, Na.sub.2 O and Li.sub.2 O to at least one of the surfaces to be bonded together. The oxide glass may be applied prior to or after prefiring or main firing and the frit or the raw material weight-in quantity of the glass may be used. Finally, the ferrite parts are fused at temperatures in excess of the glass softening point.
摘要翻译：粘结硬磁铁氧体和/或软磁铁氧体部分的方法包括以下步骤：在相应的玻璃形成的共晶点中施加含有相当于氧化铁比例的约50至约200％的氧化铁的氧化物玻璃多组分体系，约0.4至约0.8摩尔％的选自SiO 2，P 2 O 5和B 2 O 3以及约0.1至约0.4摩尔％的碱金属BaO，SrO，CaO，K 2 O，Na 2 O和Li 2 O的润湿剂，要结合在一起的至少一个表面。氧化物玻璃可以在预焙烧或主烧制之前或之后施用，并且可以使用玻璃料或玻璃料的原料重量。最后，铁氧体部分在超过玻璃软化点的温度下熔合。

2. 发明授权

US4773938A Finely divided isometric hexaferrite pigments with a W-structure, processes for their preparation and their use 失效
标题翻译：具有W结构的细分等轴六方晶系颜料，其制备方法及其用途
公开(公告)号：US4773938A
公开(公告)日：1988-09-27
申请号：US918574
申请日：1986-10-14
申请人： Gunter Buxbaum , Ulrich Meisen , Florian Haberey
发明人： Gunter Buxbaum , Ulrich Meisen , Florian Haberey
IPC分类号： C01G49/00 , C04B35/26 , C09C1/22 , C09C1/24 , G11B5/706 , H01F1/11 , C04B14/00
CPC分类号： C04B35/2608 , C01G49/009 , C04B35/2633 , C09C1/22 , G11B5/70678 , C01P2002/32 , C01P2004/03 , C01P2004/20 , C01P2004/54 , C01P2006/42
摘要： Finely divided magnetic particles of hexaferrite pigments with a W-structure having the compositionE.sub.x M.sub.m (I) M.sub.n (II) Fe.sub.18 -(m+n)O.sub.27-y D.sub.ywhereinE is at least one element from the group comprising alkaline earth metals, alkali metals, lanthanides or lead,M(I) and M(II) are independently at least element from the group comprising metals or semi-metals andD is at least one element from the group of halogens and chalcogens and0.8.ltoreq.x.ltoreq.1.2,1.0.ltoreq.m.ltoreq.3.0,0.ltoreq.n.ltoreq.8.0,0.ltoreq.y.ltoreq.5.0 andn is the same as y when n>0with the proviso that electroneutrality is preserved,and wherein the hexaferrite pigment particles have substantially the same dimensions in all directions in space are useful in producing magnetic recording media, such as tapes, and are produced by melting a mixture of (=i) metal oxides, hydroxides, hydroxyoxides, carbonates, nitrates or mixtures thereof corresponding to the composition of the W-hexaferrite pigments together with (ii) boron oxide, boric acid, metal borates, SiO.sub.2 or mixtures thereof at temperatures of from 1100.degree. to 1450.degree. C. and then chilling the melt obtained to .ltoreq.600.degree. C. and then tempering the chilled melt at temperatures of from 1000.degree. to 1400.degree. C. for 1 second to 2 hours.
摘要翻译：具有组成为Ex Mm（I）Mn（II）Fe18-（m + n）O27-yDy的W结构的六方晶系颜料的细分磁性颗粒，其中E是至少一种元素，包括碱土金属，碱金属，镧系元素或铅，M（I）和M（II）独立地是至少包含金属或半金属的元素，D是来自卤素和硫属元素的至少一种元素，当n> 0时，n与y相同，条件是电中性是（i = 0）= 1.0，并且其中六方晶系颜料颗粒在空间中在所有方向上具有基本相同的尺寸可用于制造磁记录介质，例如带，并且通过熔融（= i）金属氧化物，氢氧化物，羟基氧化物，碳酸酯的混合物，硝酸盐或其混合物，其与W-六铁素体颜料的组成以及（ii）氧化硼，硼酸，金属硼酸盐，SiO 2或其混合物，然后将所获得的熔体冷却至600℃，然后在1000-1400℃的温度下回火冷却的熔体1秒至 2小时。

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