A kind of nicuzn gyromagnetic ferrite material for ltcc circulator and preparation method thereof
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A technology of gyromagnetic ferrite and circulator, applied in the field of NiCuZn gyromagnetic ferrite materials
Active Publication Date: 2021-02-23
深圳万知达科技有限公司
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[0003] The present invention proposes a kind of NiCuZn gyromagnetic ferrite used for LTCC circulator in view of the defects existing in the background technology. The gyromagnetic ferrite solves the problems of The technical problem that NiCuZn ferrite still has good gyromagnetic properties in low temperature sintering
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preparation example Construction
[0035] A kind of preparation method of the NiCuZn gyromagnetic ferrite material that is used for LTCC circulator, comprises the following steps:
[0036] Step 1: NiO, CuO, ZnO and Fe 2 o 3 As raw material, according to the molecular formula Ni 0.2 Cu 0.2 Zn 0.6 Fe 2 o 4 NiO, CuO, ZnO and Fe were converted from the ratio of metal elements in 2 o 3 mass percentage, carry out weighing and mixing, and once ball mill for 10 hours, the raw materials are fully mixed to obtain the mixed powder after the first ball mill;
[0037] Step 2: Put the mixed powder after primary ball milling obtained in Step 1 in an oven, dry it at a temperature of 120°C, and then put it into a sintering furnace for the first pre-sintering, the pre-sintering temperature is 820°C, and the time is After 3 hours, cool down to room temperature with the furnace to obtain the pre-fired powder after the first pre-fire;
[0038] Step 3: Add 0.5wt% MnO equivalent to the mass of the powder in the calcined powder...
example 1
[0070] A kind of preparation method of the NiCuZn gyromagnetic ferrite material that is used for LTCC circulator, comprises the following steps:
[0071] Step 1: NiO (purity is 99%,), CuO (purity is 99%), ZnO (purity is 99%) and Fe 2 o 3 (purity is 99%) as raw material, according to the chemical formula Ni 0.2 Cu 0.2 Zn 0.6 Fe 2 o 4 Carry out weighing, mixing, configuration obtains main powder, the main powder that configuration obtains is according to mass ratio main powder: deionized water: the ratio of zirconium ball=1:1:2.5 carries out ball mill once, ball milling time is 12h, The rotating speed of the ball mill is 300r / min, so that it is fully mixed evenly, and the mixed powder after the first ball mill is obtained;
[0072] Step 2: Put the mixed powder after primary ball milling obtained in Step 1 in an oven, dry it at a temperature of 120°C, and then put it into a sintering furnace for the first pre-sintering, the pre-sintering temperature is 820°C, and the time i...
Embodiment 1
[0088] The properties of the NiCuZn gyromagnetic ferrite material used in LTCC circulators prepared in Example 1 are: sample density: 4.919g / cm 3 , the saturation magnetization is 50.01emu / g, the ferromagnetic resonance linewidth is 491.7Oe, and the coercive force is 347.73A / m.
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Abstract
The invention provides a NiCuZn gyromagnetic ferrite material used for LTCC circulators and a preparation method thereof, belonging to the field of magnetic ceramic material preparation. The NiCuZn gyromagnetic ferrite material is composed of main material and binary composite doping, and the binary composite doping is MnO 2 and Bi 2 o 3 as raw material, among them, MnO 2 According to the composite configuration of 0.5wt% of the main material powder mass, Bi 2 o 3 The content is respectively 0.0wt%, 0.5wt%, 1.0wt%, 1.5wt%, 2.0wt%, 3.0wt% composite configuration of the mass of the main material powder. At the same time, a new sintering method was adopted in the preparation of NiCuZn gyromagnetic ferrite materials for LTCC circulators. The present invention adopts binary doping compound configuration and a new sintering method to control and prepare NiCuZn gyromagnetic ferrite material for gyromagnetic properties, so as to solve the problem of poor porosity due to insufficient crystal grain growth in low-temperature sintering under the LTCC process. structure, leading to technical problems such as low density, large voids, and high ferromagnetic resonance linewidth. A NiCuZn gyromagnetic ferrite material with good gyromagnetic properties was prepared, which can be widely used in microwave devices and microwave circuit systems.
Description
technical field [0001] The invention relates to the field of ceramic electronic materials, in particular to a NiCuZn gyromagnetic ferrite material used for LTCC circulators. Background technique [0002] The rapid development of electronic information and communication technology, especially the rapid development of Internet of Things technology and radio frequency microwave technology, has put forward higher and higher requirements for the miniaturization, light weight and integration of electronic devices. LTCC (Low Temperature Co-fired Ceramic, low temperature co-fired ceramics) technology has attracted more and more attention because it can realize high-reliability and miniaturized microwave modules in recent years. As a key component, circulators are widely used in antenna systems and communication systems. The circulator prepared by LTCC technology can well meet today's miniaturized and integrated microwave devices, and has a very wide range of applications in electro...
Claims
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