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Ferromagnetic ferrite materials for use at microwave frequencies
Ferromagnetic ferrite materials for use at microwave frequencies
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机译：用于微波频率的铁磁铁氧体材料
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981,143. Magnetic compositions. STANDARD TELEPHONES & CABLES Ltd. Feb. 15, 1963 [Feb. 22, 1962; Jan. 23, 1963], No. 6263/63. Heading H1H. A ferromagnetic ferrite material of spinel crystal structure and suitable for microwave devices requiring stable thermal properties has the formula where x+y= 100 and 0.5 # y # 90, and L and Q represent one or more of the bivalent metals FeSP**/SP, MnSP**/SP, CoSP**/SP, NiSP**/SP, MgSP**/SP, ZnSP**/SP, R represents one or more of the trivalent metals FeSP***/SP, CrSP***/SP, AlSP***/SP, GaSP***/SP, MnSP***/SP, Ti is quadrivalent titanium, and Fe 2 O comprises at least ¥ of the R 2 O 3 . Essentially the material is a solid solution of the two components (LOR 2 O 3 ) and (TiO 2 2QO), both of which have similar spinel crystal structures, and is preferably made by sintering a mixture of these two components in powdered form. The two components may each have undergone a presintering in air at 1000‹ C. for an hour prior to the main sintering. The main sintering, which is carried out after the powder mixture has been pressed into shape, comprises a slow rise in temperature to 800‹ C. over several hours, 4 to 5 hours at 1200‹ C. and slow cooling over 20 hours, all in O 2 . The alternative process of sintering from the constituent metal oxides is also envisaged. Specific examples disclosed are 70(NiOFe 2 O 3 ) + 30(TiO 2 2ZnO), 90(NiOFe 2 O 3 ) + 10(TiO 2 2MgO), 90(0.92MgO, 0.18- MnO, 0.90Fe 2 O 2 ) + 10(T 1 O 2 . 2ZnO). The material may be used in a Faraday rotator and in a phase-shifter where a constant phase-shift over the temperature range 0-120‹ C. may be obtained.
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机译：981143。磁性成分。标准电话电缆公司1963年2月15日[2月2日。 1962年2月22日; [1963年1月23日]，编号6263/63。标题H1H。尖晶石晶体结构的铁磁铁氧体材料并且适用于需要稳定的热特性的微波装置，具有下式：其中x + y ＝ 100且0.5＃y＃90，L和Q表示一种或多种二价金属Fe SP。 * ，Mn ** ，Co ** ，Ni ** ，Mg ** ， Zn ** ，R表示一种或多种三价金属Fe *** ，Cr *** ，Al ** * ，Ga *** ，Mn *** ，Ti为四价钛，Fe 2 O至少占R 2 O 3的¥。本质上，该材料是两种组分（LOR 2 O 3）和（TiO 2 2QO）的固溶体，这两种组分具有相似的尖晶石晶体结构，并且优选通过烧结这两种粉末形式的混合物制成。在主烧结之前，这两个组件可能已在空气中于1000℃进行了一个小时的预烧结。在将粉末混合物压制成形后进行的主要烧结过程包括：在数小时内将温度缓慢升高至800℃，在1200℃下4至5小时，并在20小时内缓慢冷却，所有在O 2中。还设想了从组成金属氧化物烧结的替代方法。公开的具体实例是70（NiOFe 2 O 3）+ 30（TiO 2 2ZnO），90（NiOFe 2 O 3）+ 10（TiO 2 2MgO），90（0.92MgO，0.18- MnO，0.90Fe 2 O 2）+ 10（T 1 O 2 .2ZnO）。该材料可用于法拉第转子和移相器中，在该温度范围内可在0-120°C的温度范围内获得恒定的相移。
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