Unlock instant, AI-driven research and patent intelligence for your innovation.
Nicuzn ferrite magnetic sheet and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of ferrite magnets and magnetic sheets, applied in the field of NiCuZn ferrite magnetic sheets and its preparation, can solve the problems of weakened signal strength and shortened operating distance
Active Publication Date: 2021-02-12
四川诺威胜电子科技有限公司
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The metal environment inside the mobile phone will generate an induced magnetic field generated by eddy current. According to Lenz's theorem, the direction of this magnetic field is opposite to that of the original magnetic field, so the signal strength will be weakened and the working distance will be shortened.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0032] The NiCuZn ferrite magnetic sheet with high magnetic permeability real part μ ', low magnetic permeability imaginary part μ ", high Q value and preparation method thereof of the present invention comprises the following steps:
[0033] 1. Main formula:
[0034] Fe 2 o 3 : 48.0~49.5mol%, ZnO: 21~24mol%, NiO: 20.5~16.5mol%, CuO: 10.0~11.0mol%;
[0042] Mix 300-380g of powder doped with additives in 4, 150-200g of organic binder (including binder, dispersant, plasticizer), 100-200g of alcohol, and ball mill for 2-4 hours to mix evenly;
[0054] A NiCuZn ferrite magnetic sheet with high magnetic permeability real part μ′, low magnetic permeability imaginary part μ″, high Q value and a preparation method thereof, comprising the following steps:
[0068] Prepare a raw film tape with a thickness of 200 μm by casting the uniformly mixed slurry, with a scraper height of 600 μm and a drying temper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
thickness
aaaaa
aaaaa
thickness
aaaaa
aaaaa
thickness
aaaaa
aaaaa
Login to View More
Abstract
A NiCuZn ferrite magnetic sheet and a preparation method thereof belong to the technical field of electronic materials. The components of the NiCuZn ferrite magnetic sheet of the present invention include main materials and additives. Calculated by oxides, the main materials include: Fe 2 o 3 : 48.0~49.5mol%, ZnO: 21~24mol%, NiO: 20.5~16.5mol%, CuO: 10.0~11.0mol%; additives include: Co 2 o 3 : 0.20~0.50wt%, TiO 2 : 0.10~0.40wt%, SnO 2 : 0.10-0.40wt%; the proportion of the additive is based on the quality of the product after the main material is calcined at 800-900°C for 2-3 hours. The ferrite magnetic sheet of the present invention has a real part of complex permeability μ′ of 150 to 160, an imaginary part of complex permeability of μ″ of 1.4 to 1.6, Q>100, and a thickness of 100 to 300 μm at a frequency of 13.56 MHz, and Has good flexibility.
Description
technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a NiCuZn ferrite magnetic sheet with high magnetic permeability real part (μ') and high quality factor (Q) applied to an NFC system and a preparation method thereof. Background technique [0002] NFC (near field communication) is a new technology that has emerged in recent years and evolved from radio frequency identification (RFID) technology. It is the product of the combination of Internet technology and RFID (radio frequencyidentification technology). It has the advantages of large data volume, high confidentiality, strong anti-interference ability, short recognition time, and low cost, and has a good application prospect. In particular, the trend of combining NFC technology with mobile phones makes it an eye-catching new technology in the future. It can meet the information exchange, content access, service exchange between any two wireless devices...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More