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Method for testing dielectric property of ceramic material and application of method

A technology of ceramic materials and dielectric properties, applied in the field of functional materials testing, can solve the problems of long cycle time, complex production process of final products, difficulty in meeting the testing requirements of ceramic filling materials, etc., and achieve short preparation time and accurate results of dielectric properties Reliable, stable results

Pending Publication Date: 2022-05-24
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The dielectric properties of ceramic filler materials directly affect the performance of composite materials and the use of final products, but there is currently no method that can efficiently and stably test the dielectric properties of ceramic materials. The traditional method is to test the dielectric properties of products, such as strip lines However, due to the complex production process and long cycle of the final product (such as copper clad laminate), the product performance is affected by many aspects such as raw materials and preparation processes, and it is difficult to meet the requirements of pure ceramic filling materials. Test requirements for dielectric properties

Method used

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  • Method for testing dielectric property of ceramic material and application of method

Examples

Experimental program
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Embodiment 1

[0034] The present embodiment provides a method for testing the dielectric properties of ceramic powder, and the specific steps are as follows:

[0035] S1. The mass ratio of the dispersion is, polyethylene oxide: ethanol: water = 0.03: 2: 100, and the viscosity of the dispersion is 50 mP.S. To the dispersion (20 g), add titanium dioxide powder (40 g, particle size 20 μm, shape spherical shape, impurity content <1wt%), after stirring uniformly, add PTFE dispersion emulsion (30g, solid content is 60%) and stir uniformly.

[0036] S2. The slurry obtained in S1 is placed in an oven at 100° C., dehydrated for 15 minutes, and then taken out and cooled.

[0037] S3, put the sample obtained in S2 into a calender for calendering, the calendering temperature is 25° C., the calendering speed is 10r / min, the number of calendering is 16 times, and the calendering thickness is 0.6mm.

[0038] S4, put the sample obtained in S3 into the oven for debinding, the debinding temperature is 170°C...

Embodiment 2

[0043] The difference between the method for testing the dielectric properties of the ceramic powder provided in this example is that the ceramic powder used in this example is an angular titanium dioxide powder with a particle size of 3 μm.

[0044] After testing, at room temperature, the density of the sample is 2.91g / cm 3 , the dielectric constant at 6.5GHz is 11.45, and the dielectric loss is 0.00103.

Embodiment 3

[0046] The difference between the test method provided in this example and Example 1 is that the ceramic powder used in this example is spherical strontium titanate powder with equal mass and particle size of 15 μm.

[0047] After testing, at room temperature, the density of the sample is 3.32g / cm 3, the dielectric constant at 6.5GHz is 16.45, and the dielectric loss is 0.0082.

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Abstract

The invention provides a method for testing dielectric properties of a ceramic material and application of the method. The testing method comprises sample preparation and detection, and the sample preparation comprises the following steps: mixing a ceramic material with a dispersion liquid and polytetrafluoroethylene, and sequentially carrying out dehydration, calendaring molding, glue discharging and sintering to obtain a to-be-tested sample; wherein the dispersion liquid is an aqueous solution of a flocculating agent. The test method provided by the invention can accurately determine the dielectric property of the ceramic material filled in polytetrafluoroethylene, can be benchmarked with the dielectric property of a dielectric product produced by taking the ceramic material as a raw material, and can be used for evaluating the advantages and disadvantages of the dielectric property of pure ceramic powder or a composite material of the ceramic powder and the like. The test method provided by the invention is efficient, simple, convenient and stable, can quickly detect the dielectric property of the high-dielectric raw material under high frequency, and is suitable for experiment or production research and development environments with complex formula and more conditions.

Description

technical field [0001] The invention relates to the field of detection of functional materials, in particular to a method for testing the dielectric properties of ceramic materials and applications thereof. Background technique [0002] With the advancement of modern technology, it is difficult for traditional materials to meet the challenges brought by the miniaturization, high speed and high frequency of electronic products. PTFE resin has extremely low dielectric loss at high frequency (10 -4 order of magnitude), stable dielectric constant (about 2.1), and due to its unique molecular structure, it can be used in a higher temperature (180-260 ° C) range. High-frequency circuit boards, antennas, etc. require high dielectric constant (dielectric constant>10) and extremely low dielectric loss, so PTFE is used as the matrix, and high-dielectric ceramic filling materials are filled into it to prepare high-dielectric Functional materials are the current hotspot. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22G01N1/38G01N1/28
CPCG01N27/221G01N1/28G01N1/286G01N1/38
Inventor 朱恒曹玉骁马艳青王军王海超潘光军刘金祥
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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