A kind of ceramic material and its preparation method, polytetrafluoroethylene-ceramic composite material and its preparation method and substrate

A ceramic composite material and polytetrafluoroethylene technology, applied in the field of polytetrafluoroethylene, can solve the problems of large temperature frequency coefficient, poor thermal conductivity, poor quality factor of substrate, etc., and achieve low frequency temperature coefficient, high thermal conductivity, The effect of high dielectric constant

Active Publication Date: 2017-09-22
CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quality factor of the substrate prepared by this method is poor, the highest is only 5600, and the temperature frequency coefficient is large, and the thermal conductivity is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The invention provides a preparation method of a ceramic material, comprising:

[0038] mixing zinc oxide, lithium carbonate, niobium pentoxide and titanium dioxide to obtain a mixture;

[0039] The mixture is calcined to obtain a ceramic material; the ceramic material has a general formula shown in formula I:

[0040] wxya 2 TiO 3 -(1-x)ZnNb 2 o 6 Formula I;

[0041] In Formula I, 0.25≤x≤0.4.

[0042] The ceramic material prepared by the method provided by the invention has higher dielectric constant, lower loss, lower frequency temperature coefficient and higher thermal conductivity.

[0043] The invention mixes zinc oxide, lithium carbonate, niobium pentoxide and titanium dioxide to obtain a mixture. In the present invention, the mixing temperature is preferably 20°C to 30°C, more preferably 24°C to 28°C. In the present invention, the mixing time is preferably 8 hours to 12 hours, more preferably 9 hours to 10 hours.

[0044] In the present invention, zinc ...

Embodiment 1

[0101] 243g of zinc oxide, 67g of lithium carbonate, 828g of niobium pentoxide and 80g of titanium dioxide were mixed by ball milling at 25°C for 12 hours to obtain a mixture;

[0102] The mixture was dried at 100° C. for 6 hours, and the dried mixture was calcined at 1280° C. for 4 hours to obtain ceramic powder.

[0103] The ceramic powder prepared in Example 1 of the present invention is divided into two batches, and the first batch of ceramic powder is ball milled, dried, and sieved for 3 hours to obtain ceramic powder with a particle size of 30 microns. The drying temperature is 100°C;

[0104] The second batch of ceramic powder was ball milled, dried, and sieved for 12 hours to obtain ceramic powder with a particle size of 3 microns, and the drying temperature was 100°C.

[0105] According to the method described in the above-mentioned technical scheme, test the general formula of the ceramic powder prepared in Example 1 of the present invention, the test result is that...

Embodiment 2

[0107] 189g of zinc oxide, 67g of lithium carbonate, 643g of niobium pentoxide and 80g of titanium dioxide were mixed by ball milling at 25°C for 12 hours to obtain a mixture;

[0108]The mixture was dried at 120° C. for 6 hours, and the dried mixture was calcined at 1300° C. for 4 hours to obtain ceramic powder.

[0109] The ceramic powder prepared in Example 2 of the present invention is divided into two batches, and the first batch of ceramic powder is ball milled, dried, and sieved for 3 hours to obtain a ceramic powder with a particle size of 30 microns. The drying temperature is 120°C;

[0110] The second batch of ceramic powder was ball milled, dried, and sieved for 12 hours to obtain ceramic powder with a particle size of 3 microns, and the drying temperature was 120°C.

[0111] According to the method described in the above-mentioned technical scheme, test the general formula of the ceramic powder prepared in Example 2 of the present invention, the test result is tha...

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Abstract

The invention provides a ceramic material and a preparation method thereof. The ceramic material has the general formula shown in formula I. The invention provides a polytetrafluoroethylene-ceramic composite material, which is prepared from ceramic powder and polytetrafluoroethylene, and the ceramic powder has the general formula shown in formula I. The invention provides a preparation method of a polytetrafluoroethylene-ceramic composite material, comprising: under the action of a silane coupling agent, mixing ceramic powder, polytetrafluoroethylene and a demulsifier to obtain a polytetrafluoroethylene-ceramic Composite material, the demulsifier includes alcohol compound or ether compound; the ceramic powder has the general formula shown in formula I. The invention provides a substrate, which is prepared from the above-mentioned polytetrafluoroethylene-ceramic composite material. The polytetrafluoroethylene-ceramic composite material provided by the invention has higher dielectric constant, lower loss, higher quality factor and higher thermal conductivity. xLi2TiO3‑(1‑x)ZnNb2O6 Formula I.

Description

technical field [0001] The invention relates to the technical field of polytetrafluoroethylene, in particular to a ceramic material and a preparation method thereof, a polytetrafluoroethylene-ceramic composite material and a preparation method thereof, and a substrate. Background technique [0002] With the rapid development of the wireless communication field, the requirements for electronic components are getting higher and higher, which puts forward higher requirements for the performance of high-frequency materials. At present, the commercialized high-frequency substrate materials mainly include: polytetrafluoroethylene (PTFE), polyphenylene oxide (PPO), and epoxy resin composite material (FR-4). Among them, polytetrafluoroethylene materials have a wide range of applications, but pure polytetrafluoroethylene substrates have a small dielectric constant, a low quality factor, and a thermal conductivity of less than 1W / mK, which is difficult to use at high frequencies. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C08L27/18C08K3/22
Inventor 刘明龙杨晓战雒文博聂爽江林
Owner CHONGQING YUNTIANHUA HIGH END NEW MATERIALS DEV CO LTD
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