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Electromagnetic load composite material for feed networks and preparation method

A composite material and feeding network technology, which is applied in the field of electromagnetic load composite materials and preparations for feeding networks, and can solve the problems that spherical carbonyl iron materials are difficult to meet

Inactive Publication Date: 2019-05-07
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous improvement of the frequency band used in equipment units, higher requirements are placed on the electromagnetic properties of the load material used in the feed network, and spherical carbonyl iron materials have been difficult to meet

Method used

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  • Electromagnetic load composite material for feed networks and preparation method

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preparation example Construction

[0035] The invention provides a preparation method of an electromagnetic load composite material for a feeder network, and the preparation method comprises the following steps:

[0036] (1) High-energy ball milling of carbonyl iron powder: carbonyl iron powder, steel balls, ball milling aids and solvents are mixed, high-energy ball milling, and drying to obtain flaky carbonyl iron powder; high-energy ball milling can be by means of existing high-energy ball milling devices (such as , high energy ball mill);

[0037] (2) Mixing: mix the flaky carbonyl iron powder and the silane coupling agent evenly, then add resin, diluent and curing agent and mix evenly to obtain a mixed glue; and

[0038] (3) Curing: The composite material is obtained by compression molding or ultrasonic curing of the mixed glue solution.

[0039] In some preferred embodiments, when performing high-energy ball milling, the ball-to-material ratio is (4.5-7):1, for example, it can be 4.5:1, 5:1, 5.5:1, 6:1, 6...

Embodiment 1

[0064] Weigh 7g of epoxy resin, 1.8g of propylene oxide butyl ether, 0.6g of triethylenetetramine, 0.6g of 2-ethyl-4-methylimidazole, stir mechanically at room temperature for 0.5h to mix evenly; then add 80g of untreated Carbonyl iron powder, then add 0.4g KH-570, and then mix and stir for 6 hours under the assistance of vacuum; finally, pour the mixed glue into the mold, press molding at 15MPa pressure and 100℃, and finally get carbonyl iron / epoxy resin composite material.

Embodiment 2

[0066] Mix 500g of steel balls (including 167g of steel balls with a diameter of 2mm and 333g of steel balls with a diameter of 4mm) with 85g of carbonyl iron powder, then add 0.015g of calcium stearate and 150mL of acetone together and place them in the nodular ink tank at a fixed speed of 550r / min high-energy ball milling for 8 hours and drying to obtain flaky carbonyl iron powder.

[0067] Weigh 7g of epoxy resin, 1.8g of propylene oxide butyl ether, 0.6g of triethylenetetramine, 0.6g of 2-ethyl-4-methylimidazole, mix and stir at room temperature for 0.5h; carbonyl iron powder, then add 0.4g KH-570, and mix and stir for 6h under vacuum assistance to obtain a mixed glue.

[0068] Finally, the mixed glue was poured into the mold, and molded under a pressure of 15MPa and 100°C to finally obtain a sheet-shaped carbonyl iron / epoxy resin composite material.

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Abstract

The invention relates to an electromagnetic load composite material for feed networks and a preparation method thereof. The preparation method includes the steps of: (1) high energy ball milling of carbonyl iron powder: mixing carbonyl iron powder, steel balls, a ball milling additive and a solvent, conducting high energy ball milling, and performing drying to obtain flaky carbonyl iron powder; (2) mixing: mixing the flaky carbonyl iron powder and a silane coupling agent evenly, then adding resin, a diluent and a curing agent, and mixing the substances evenly to obtain a mixed glue solution; (3) curing: subjecting the mixed glue solution to compression molding or ultrasonic curing molding, thus obtaining the composite material. The composite material prepared by the method provided by theinvention shows high electromagnetic parameters at 0.1-18GHz, especially magnetic loss performance, and can be widely applied to electronic equipment in radar, navigation, satellite communication, electronic countermeasures, radio and television, mobile communication and other fields.

Description

technical field [0001] The invention relates to the technical field of electromagnetic functional composite materials, in particular to an electromagnetic load composite material for a feed network and a preparation method thereof. Background technique [0002] With the rapid development of high-end electronic equipment, the technical requirements for the performance of electronic components in the equipment are also getting higher and higher. Carbonyl iron materials are widely used in electromagnetic wave transmission technology and occupy an important position, and are the core materials of electronic components. At present, carbonyl iron materials used in various devices are generally spherical structures, which have better electromagnetic shielding effect in the microwave frequency range. However, with the continuous improvement of the frequency band used in the equipment unit, higher requirements are placed on the electromagnetic properties of the load material used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/14C04B111/90
Inventor 兰天李南张天翔张育新
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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