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Thermostable composition of low dielectric loss and its preparing process

A composition and low dielectric technology, applied in the field of dielectric composite material preparation, can solve the problems of unfavorable research and development of high-stability products, high dielectric loss of composite materials, small particle size of inorganic fillers, etc. The effect of high constant and low dielectric loss

Inactive Publication Date: 2009-05-20
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen from the existing literature that (1) the particle size of the selected inorganic fillers is small (more than ten microns to nanometers), and the cost of raw materials is relatively high; (2) the dielectric loss of the obtained composite material is relatively high (average higher than the resin matrix), which is unfavorable for the development of high-stability products; (3) the simple organic / inorganic binary compound method cannot be used to obtain materials with both adjustable dielectric constant and low dielectric loss characteristics, and it is necessary to assist in doping Miscellaneous means

Method used

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  • Thermostable composition of low dielectric loss and its preparing process
  • Thermostable composition of low dielectric loss and its preparing process
  • Thermostable composition of low dielectric loss and its preparing process

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Effect test

Embodiment 1

[0023] According to A1 listed in Table 1, bisphenol A type dicyanate (BADCy) and BaTiO 3 (400 mesh) mixed according to the proportion, the mixture was heated and melted in an oil bath at 100°C, and then heated to 150°C for pre-curing for 4 hours, BaTiO 3 Without obvious sedimentation, an organic / inorganic binary composition with adjustable dielectric constant and low dielectric loss is obtained.

[0024] Inject the composition into a preheated (150°C) mold, degas it in a vacuum oven at 100-105°C for 30 minutes, and cure it according to the process of 160°C / 2h+180°C / 2h+200°C / 2h , according to the process of 230 ℃ / 5h for post-treatment, that is, get BADCy / BaTiO 3 composite material. Test the dielectric constant in the range of 1Hz ~ 10GHz, its value is as attached figure 1 shown. It can be seen that the dielectric constant of the material is stable over the entire test frequency range.

Embodiment 2 7

[0026] According to the formulas A1~A7 listed in Table 1, bisphenol A type dicyanate (BADCy) and BaTiO 3 (400 mesh) mixed according to the proportion, the mixture was heated and melted in an oil bath at 100°C, and then heated to 150°C to pre-cure for a certain period of time until BaTiO 3 Without obvious sedimentation (as shown in Table 1), an organic / inorganic binary composition with adjustable dielectric constant and low dielectric loss is obtained.

[0027] Inject the composition into a preheated (150°C) mold, degas it in a vacuum oven at 100-105°C for 30 minutes, and cure it according to the process of 160°C / 2h+180°C / 2h+200°C / 2h. According to the process of 230℃ / 5h for post-treatment, BADCy / BaTiO can be obtained 3 composite material. The dielectric properties of each sample at 1KHz are as attached figure 2 And attached image 3 shown. It can be seen that the dielectric constant of the material varies with the BaTiO in the system 3 content increases, when BaTiO 3 Wh...

Embodiment 8 9

[0033] Combine 35g BADCy and 15g BaTiO 3 (400 mesh) mixing, the mixture is heated and melted in an oil bath at 100°C, and then heated to 130°C for pre-curing for 8 hours to BaTiO 3 Without obvious sedimentation, an organic / inorganic binary composition with adjustable dielectric constant and low dielectric loss is obtained.

[0034] The composition is injected into a mold preheated at 150°C, degassed in a vacuum oven at 100-105°C for 30 minutes, and cured according to the process of 160°C / 2h+180°C / 2h+200°C / 2h, and finally Post-treatment is carried out according to the process of 220°C / 1h or 220°C / 1h+230°C / 4h respectively. The dielectric properties of the obtained samples are shown in Table 2. It can be seen that when the curing degree of the material is about 100%, the dielectric constant of the material can be realized by changing the post-treatment process of the material. In addition, the dielectric loss tangent of the material decreases further with subsequent processing. ...

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Abstract

The invention discloses a heat-proof composition with low-dielectric consumption, which consists of 40-99.9% cyanate and 0.1-60% barium titanate, wherein the grain size of barium titanate is between 150 and 600 order. The making method comprises the following steps: blending cyanate and barium titanate to fuse at 100 deg.c; heating to 130-160 deg.c to presolidify until the barium titanate doesn't sediment obviously; obtaining the composition with dielectric constant between 2 and 6 adjustably through changing the content of barium titanate , physical chemical property and subsequent disposing technique of composition.

Description

technical field [0001] The invention relates to a heat-resistant organic / inorganic binary composition with adjustable dielectric constant and low dielectric loss, belonging to the technical field of dielectric composite material preparation. Background technique [0002] In order to meet the requirements of electrical performance design and use, modern industry has an increasing demand for heat-resistant materials with adjustable dielectric constant and low dielectric loss. Since it is difficult to meet the requirements of manufacturability and performance for a single variety of materials, the development of organic / inorganic composite materials that have both the excellent mechanical properties and manufacturability of organic polymers and the excellent dielectric properties of inorganic substances has become the current focus in the field of dielectric materials. Research hotspots. [0003] In recent years, there have been many studies on organic / inorganic composite diel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/12C08K3/24C04B35/468
Inventor 顾嫒娟晁芬梁国正
Owner SUZHOU UNIV
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