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Highly dielectric elastomer composition and dielectric antenna

A technology of elastomers and compositions, applied in circuits, insulators, electrical components, etc., can solve the problems of easy oxidation of electrodes, poor dielectric properties, difficult metal plating treatment, etc., and achieve the effect of small temperature dependence.

Inactive Publication Date: 2011-09-28
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that it is generally difficult to perform metal plating treatment, and a special bottom surface treatment such as Patent Document 3 and Patent Document 4 must be applied.
In addition, when forming electrodes by plating treatment, the adhesiveness to the antenna material is poor even after the bottom surface treatment, so the dielectric characteristics may be deteriorated, so it is not advisable.
In addition, when copper foil is used for the electrode as in Patent Document 5, since the electrode is easily oxidized, there is a problem that oxidation occurs when the use temperature rises and the electrical conductivity decreases.

Method used

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  • Highly dielectric elastomer composition and dielectric antenna
  • Highly dielectric elastomer composition and dielectric antenna
  • Highly dielectric elastomer composition and dielectric antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 3

[0083] Mix EPDM according to the mixing ratio shown in Table 1, and the temperature coefficient α of the specific dielectric constant is -100×10 -6 Barium titanate and neodymium-based ceramic powder (manufactured by Kyoritsu Material Co., Ltd., HF-120, specific permittivity: 120), vulcanization accelerators, processing aids, etc., obtained by hot pressing to obtain a molded body of 80mm×80mm×1.5mm . In addition, the vulcanization conditions were 170°C x 30 minutes, and the content of vulcanization accelerators and processing aids were respectively mixed with 1 part by weight (phr) of stearic acid (manufactured by Kao Corporation, Lunatsuku S-30), 5 parts by weight (phr) zinc oxide (manufactured by Inoue Carboniferous Industry Co., Ltd., META-ZL-40), 3 parts by weight (phr) processing aid (manufactured by Kao Corporation, Sprender-R-100), 2.5 parts by weight (phr) of vulcanization accelerator ( Sumitomo Chemical Co., Ltd., Sokusino-L M), 1.5 parts by weight (phr) of sulfur (Ts...

Embodiment 4～ Embodiment 6

[0086] In addition to using a specific permittivity temperature coefficient α of -40×10 -6 Barium titanate and neodymium-based ceramic powder (manufactured by Kyoritsu Material Co., Ltd., HF-100, specific permittivity: 100) was used instead of the ceramic powder, and a molded body was obtained under the same conditions and method as in Example 1.

[0087] The obtained molded body was evaluated under the same conditions as in Example 1. The measurement results are shown in Table 1.

[0088] [Table 1]

[0089]

[0090] As shown in Examples 1 to 3, the specific permittivity of the molded body at 25°C is 7 or more, the dielectric loss tangent is 0.01 or less, and the temperature coefficient of the specific permittivity is -1200×10 -6 . In addition, as shown in Examples 4 to 6, the specific permittivity at 25°C is 7 or more, the dielectric loss tangent is 0.01 or less, and the temperature coefficient of the specific permittivity is -1067×10 -6 . These values ​​are high diel...

Embodiment 7～ Embodiment 9

[0109]Trace additives such as EPDM, barium titanate and neodymium ceramic powder (manufactured by Kyoritsu Material Co., Ltd., HF-120, specific permittivity: 120), vulcanization accelerators and processing aids were mixed according to the mixing ratio shown in Table 3, respectively. Thermocompression molding was performed to obtain a molded body of 80 mm×80 mm×2 mm. In addition, the vulcanization conditions were 170°C x 30 minutes, and the content of vulcanization accelerators and processing aids were respectively mixed with 1 part by weight (phr) of stearic acid (manufactured by Kao Corporation, Lunatsuku S-30), 5 parts by weight (phr) zinc oxide (manufactured by Inoue Carboniferous Industry Co., Ltd., MBTA-ZL-40), 3 parts by weight (phr) of processing aid (manufactured by Kao Corporation, Sprender-R-100), 2.5 parts by weight (phr) of vulcanization accelerator ( Sumitomo Chemical Co., Ltd., Sokusino-L M), 1.5 parts by weight (phr) of sulfur (Tsurumi Chemical Industry Co., Ltd...

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Abstract

A highly dielectric elastomer composition that over a wide temperature range from low to high temperature, exhibits a high specific inductive capacity and has a low dielectric loss tangent; and a dielectric antenna utilizing this composition. There is provided a dielectric antenna comprising a molding of highly dielectric elastomer composition composed of an elastomer blended with highly dielectric ceramic powder and, mounted on the molding, an electrode, wherein the highly dielectric ceramic powder has a temperature coefficient, alpha (unit: 1 / DEG C), of specific inductive capacity of ceramic powder on 25 DEG C standard ranging from -200*10<-6> to 100*10<-6> over a temperature range from -40 DEG to 100 DEG C; the highly dielectric elastomer composition has a specific inductive capacity of >=7 and a dielectric loss tangent of <=0.01; the highly dielectric ceramic powder consists of barium titanate / neodymium ceramic powder; and the electrode is formed by bonding of nickel or silver plated or otherwise plated copper foils, or by screen printing using a conductive paste.

Description

technical field [0001] The present invention relates to a high-dielectric elastomer composition and a dielectric antenna formed by disposing and equipping electrodes in a molded body of the composition, and particularly to a high-dielectric high-dielectric component for electrical and electronic components that can be used in high-frequency bands. Flexible elastomer composition and dielectric antenna. Background technique [0002] In recent years, with the amazing spread of patch antennas used in mobile phones, cordless phones, RFID, etc., radio telescopes, and lens antennas such as millimeter-wave radars, etc., and the remarkable progress of satellite communication equipment, people are looking forward to higher frequency communication signals and further miniaturization of communication equipment. [0003] For communication equipment, if the specific permittivity (specific dielectric constant) of the antenna material incorporated in it is high, it can further achieve high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38C08L101/00H01B3/12C08L23/16H01B3/00C08K3/00
CPCC08L101/12C08L23/16
Inventor 大平晃也
Owner NTN CORP