High-performance high-compaction lithium ferrite material for phase shifter, and preparation method thereof

Abstract

The invention discloses a high-performance high-compaction lithium ferrite material for a phase shifter, and a preparation method thereof, belonging to the technical field of an electronic material. The lithium ferrite material comprises main components and an additive, wherein the main components include the following substances in parts by weight: 65-75 parts of Fe2O3, 9-12 parts of Li2CO3, 8-14 parts of TiO2, 3-4 parts of ZnO, 1-6 parts of MnCO3 and 0.1-1 part of Bi2O3; and the additive is 0.2-3wt% of the main components. The preparation method comprises the following steps: ball-milling and grinding all the components, drying and calcining, performing secondary ball-milling and grinding the calcinated components, and then granulating through a spray granulator; performing compression moulding to the obtained granules through a dry powder press, and then pressing into blanks through an isostatic press and finally putting the blanks into a furnace for sintering. The lithium ferrite material for the phase shifter, prepared by adopting the method has excellent performances of low coercivity, low dielectric loss, high compaction and the like.

Description

technical field

[0001] The invention belongs to the technical field of electronic materials, and in particular relates to a high-performance and high-density lithium ferrite material for a phase shifter and a preparation method thereof. Background technique

[0002] With the demand of military electronics and radar technology and the continuous development of microwave technology, high requirements are put forward for the comprehensive performance of microwave ferrite devices, and the research on gyromagnetic ferrite materials is also continuously deepening. The ferrite phase shifter is the key component in the passive phased array antenna unit. The maturity and demand of the phased array technology not only require the performance of the phase shifter to meet the technical requirements at room temperature, but also to meet the technical requirements in a wide range of high and low temperature. All properties in the range must be met, and there is an increasing demand for hi...

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