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Broadband and high-magnetic-permeability ferrite teflon tape and production method thereof

A technology of ferrite raw materials and high magnetic permeability, which is applied in the field of magnetic materials, can solve the problem of high Curie temperature, and achieve the effects of high Curie temperature, high initial magnetic permeability, and high inductance

Active Publication Date: 2013-04-10
JIANGSU HUAXING ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For ferrite materials, high initial magnetic permeability and high Curie temperature are required, but these two are contradictory. The existing ferrite raw materials used in the production of chip inductors on the market are difficult to maintain High initial permeability and high Curie temperature

Method used

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  • Broadband and high-magnetic-permeability ferrite teflon tape and production method thereof
  • Broadband and high-magnetic-permeability ferrite teflon tape and production method thereof
  • Broadband and high-magnetic-permeability ferrite teflon tape and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Table 1 shows the content of each component of the specific example 1 of the present invention. Weigh the calcined ferrite powder according to the formula in Table 1, add solvent and dispersant and ball mill for 3-6 hours, add binder and plasticizer and ball mill for 3-6 hours, vacuum defoaming, tape casting, and drying to obtain The low-temperature co-fired ferrite raw tape of the present invention.

[0031] In the present invention, the prepared raw material tape is engraved to make a standard test ring, the temperature is raised at 2°C / min to 450°C for 3 hours to remove glue, and then the temperature is raised from 450°C to 900°C for 3 hours at 2.5°C / min for sintering. During the cooling process, the temperature was controlled to drop to 250°C for 10 hours, and then cooled naturally with the furnace, and the performance of the sintered body was tested (see Table 2).

[0032] Table 1 The content of each component of low temperature co-fired ferrite raw tape (wt%)

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Embodiment 2

[0037] Table 4 shows the content of each component of the specific example 2 of the present invention. Weigh the calcined ferrite powder according to the formula in Table 4, add solvent and dispersant and ball mill for 3-6 hours, add binder and plasticizer and ball mill for 3-6 hours, vacuum defoaming, tape casting, and drying to obtain The low-temperature co-fired ferrite raw tape of the present invention.

[0038] In the present invention, ring-cutting is performed on the prepared raw material tape, the temperature is raised to 450°C at 2°C / min and kept for 3 hours to remove glue, and then the temperature is raised from 450°C to 900°C for 3 hours at 2.5°C / min for sintering. During the cooling process, the temperature was controlled to drop to 250°C for 10 hours, and then cooled naturally with the furnace, and the performance of the sintered body was tested (see Table 5).

[0039] Table 4 Contents of components in low temperature co-fired ferrite raw tape (wt%)

[0040] ...

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Abstract

The invention relates to a broadband and high-magnetic-permeability ferrite teflon tape and a production method thereof. The teflon tape comprises pre-burned ferrite powder and an organic tape casting system, wherein the pre-burned ferrite powder comprises ferric oxide, nickel oxide, copper oxide, zinc oxide, bismuth oxide and an additive, and the organic tape casting system comprises a solvent, a dispersant, a binder and a plasticizer. The LTCF (Low Temperature Cofired Ferrite) teflon tape prepared in the invention has a flat surface, is sintered at 900 DEG C for compactness, and a sintered body has an excellent performances: the initial permeability is not smaller than 450H / m at 100kHz, and the resistivity is not smaller than 109 ohm.cm. A chip inductor element manfauctured by using theteflon tape has high inductance and high quality factors, meanwhile, a low-temperature glass protective coating is coated in a silver paste circuit printing process of the inductor element, so that adevice failure caused by Ag diffusion when the device is used is prevented. Therefore, the broadband and high-magnetic-permeability ferrite teflon tape and the production method thereof have huge application prospect.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a wide-frequency high-permeability ferrite raw material tape. Background technique [0002] Inductance has no resistance to DC current, but has resistance to AC current. When a direct current is passed through the inductor, only fixed magnetic lines of force appear around it, which do not change with time; but when an alternating current is passed through the coil, magnetic lines of force that change with time will appear around it. This allows the chip inductance element to be applied to high-frequency nanohenry inductors in mobile communication terminals and the like. Chip multilayer inductors are small in size, high in integration, short and thin, which is conducive to the miniaturization of the circuit; the magnetic circuit is closed, it will not interfere with the surrounding components, and will not be disturbed by the adjacent components, which is conducive to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 朱海奎徐志明周洪庆赵建新张一源余捷
Owner JIANGSU HUAXING ELECTRONICS CO LTD