Preparation method of garnet with high power and high dielectric constant and garnet

Abstract

The invention discloses a preparation method of garnet with high power and high dielectric constant, which comprises the following steps: (1) burdening according to a chemical formula Y < 3-x-z-z '-y-2x'-z ''-p-q>Bi < x > Sm < z > Gd < z '> Ca < 2x' + y + z '' + p + q>Zr < y > Sn Ti < q > Ge < z '> In<p'> V < x '> Mn < w > Al < w' > Fe < 5-x '-y-z' '-p-q-w-w'-delta-p >O < 12 >, wherein 0<=x<=1.3, 0<=x'<=0.70, 0<=y'<=0.70, 0<=z<=1.0, 0<=z'<=1.0, 0<=z''<=1.5, 0<=p<=0.50, 0<=q<=0.50, 0<=w<=1.30, 0<=p'<=0.50, 0<=w'<=0.10, and the iron deficiency delta is 0 <= delta<= 0.50; (2) primary ball milling; (3) drying, and pre-sintering in an oxidizing atmosphere for the first time; (4) secondary ball milling; (5) after drying, carrying out secondary pre-sintering in an oxidizing atmosphere; (6) carrying out third-time ball milling; (7) drying and granulating, primarily pressing granules into a blank, and then carrying out cold isostatic pressing; and (8) putting a formed blank into a furnace in an oxidizing atmosphere to be sintered at the sintering temperature from 900 DEG C to 1450 DEG C, and the heat preservation time from 30 hours to 100 hours. The high-magnetic-moment garnet material with relatively low delta H, relatively high delta Hk and a high dielectric constant epsilon' is obtained by promoting the solid-phase reaction degree, reducing the formation of a Bi-rich phase and utilizing rare earth ions Sm < 3 + > for substitution in the formula.

Description

technical field [0001] The invention relates to the technical field of sound source localization, in particular to a preparation method of high-power high-dielectric constant garnet and the garnet. Background technique [0002] Microwave ferrite devices (circulators, isolators, phase shifters, etc.) are responsible for the tasks of channel selection, isolation, switching, phase shifting, and polarization state control in microwave systems, and occupy an important position in microwave technology. It has been widely used in high-tech fields such as communications, radar, aviation, aerospace, satellites, etc., as well as military and civilian uses. In recent years, with the rapid development of 5G and military communication technology, higher requirements have been placed on the miniaturization and high power of the microwave ferrite materials and devices used, especially the rapid development of 5G base stations has made microwave ferrite materials And devices bring new oppo...

AI Technical Summary

Problems solved by technology

[0008] (2) High power problem - high spin wave linewidth garnet

[0013] When Bi 3+ When the substitution amount x>1.0, although as much Zr with large ion radius as possible is adopted in both octahedral and dodecahedral positions 4+ , Ca 2+ Plasma substitution, however, to achieve Bi 3+ The goal of all entering the dodecahedral lattice and forming a single-phase solid solution is still inseparable from the cooperation and efforts of process design

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