High-Q value nickel and zinc ferrite with initial permeability of 70 and preparation method thereof

A technology of nickel-zinc ferrite and magnetic permeability, which is applied in the field of high-Q value nickel-zinc ferrite and its preparation, can solve the problems of low Q value, large core heating, large loss, etc., and achieves high Q value and improved The effect of high frequency Q value and good high frequency and low loss characteristics

Active Publication Date: 2012-07-25
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When power inductors are used at high frequencies, especially at 5MHz to 10MHz, the performance of the device is often deteriorated due to the low Q value, large loss, and large core heating.

Method used

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  • High-Q value nickel and zinc ferrite with initial permeability of 70 and preparation method thereof
  • High-Q value nickel and zinc ferrite with initial permeability of 70 and preparation method thereof
  • High-Q value nickel and zinc ferrite with initial permeability of 70 and preparation method thereof

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Embodiment Construction

[0030] The present invention will be described below based on specific examples, but the present invention is not limited to these examples.

[0031] The high-Q nickel-zinc ferrite with an initial magnetic permeability of 70 of the present invention is manufactured by a traditional oxide method, and the specific steps are as follows:

[0032] (1) Mixing: perform dry mixing according to the ratio of the main components described in Table 1 (Example and Comparative Example), and the mixing time is 60 to 90 minutes;

[0033] (2) Pre-burning: pre-fire the mixed materials in a pusher kiln, the pre-fire temperature is controlled at 860±20°C, and the pre-fire time is 240~300 minutes;

[0034] (3) Grinding: Add auxiliary components to the main component calcined material obtained in the previous step according to Table 1 (Example and Comparative Example) and perform wet grinding. The grinding time is 90 to 120 minutes. After grinding, the slurry particles The diameter is controlled a...

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Abstract

The invention relates to high-Q value nickel and zinc ferrite with the initial permeability of 70 and a preparation method thereof, which are suitable for a power inductor. The nickel and zinc ferrite comprises the following main ingredients calculated by the oxide: 47.0-49.0mol% of Fe2O3, 25.1-28.5mol% of NiO, 16.3-20.5mol% of ZnO, 4.3-7.5mol% of CuO, and also comprises the following auxiliary components: 0.1-0.2wt% of CaCO3, 0.8-1.3wt% of SiO2, 2-7wt% of LiFe5O8, 0.3-0.6wt% of Co2O3 and 0.8-1.3wt% of Bi2O3. The high-Q value nickel and zinc ferrite is prepared with an oxide method and is sintered under certain condition. The sintered product has the characteristics of high Q value within the high-frequency range of 5-10MHz, and is suitable for the requirement of high frequency and low loss of the ferrite material by the power inductor.

Description

Technical field [0001] The present invention is the field of soft magnet oxygen technology, which involves a high Q value nickel -zinc iron oxygen body and its preparation method with a starting magnetic guidance rate of 70. Background technique [0002] Nickel -zinc iron oxygen has the characteristics of high resistivity, high frequency, etc., so that it can be widely used in the fields of anticroxer electromagnetic interference, SMD (Surface Mount Devices), MLCI (Multiplayer Chop Inuctors), electronic transformers, high -power synthesizers and other fields.,Market prospects. [0003] As the device develops towards a higher frequency, higher requirements have been put on the performance of nickel -zinc soft magnet oxygen.The power induction is used at high frequency, especially at 5MHz ~ 10MHz. Often, due to the low Q value, the loss of the loss, the magnetic heart is more fever, which causes the performance of the device to deteriorate.In order to correspond to the requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 聂敏徐方舟孙蒋平申志刚
Owner TDG HLDG CO LTD
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