CN214937151U - Nonlinear conductive structure and insulator - Google Patents
Nonlinear conductive structure and insulator Download PDFInfo
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- CN214937151U CN214937151U CN202022786291.5U CN202022786291U CN214937151U CN 214937151 U CN214937151 U CN 214937151U CN 202022786291 U CN202022786291 U CN 202022786291U CN 214937151 U CN214937151 U CN 214937151U
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- silicon rubber
- zinc oxide
- tetrapod
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- conductive structure
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Abstract
The utility model discloses show a nonlinear electrical conduction structure, including silicon rubber base member and the filler of packing in the silicon rubber base member, filler evenly distributed is in the silicon rubber base member, the filler is four needle-like zinc oxide whiskers, four needle-like zinc oxide whiskers are three-dimensional four needle-like spatial structure, including the core and the 4 needle-like crystals that extend from the radial direction of core, the volume fraction of filler surpasss 5 vol% and can reach the percolation threshold value of silicon rubber base member. The utility model has the advantages of, adopt above-mentioned structure can reduce the proportion of filler, improve the mechanical strength of silicon rubber base member. The utility model also shows an insulator.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a nonlinear conductance structure and insulator belongs to power equipment technical field.
[ background of the invention ]
In a high-low voltage power system, there are many positions where electric fields are not uniformly distributed, such as a cable terminal, a cable connector, a wall bushing flange, an insulator, etc., and a voltage control tube, a stress cone, etc., made of a material with semiconducting properties are usually installed at a field intensity concentration position to perform field intensity uniformity. Compared with a semi-conductive material, the nonlinear conductive material has more remarkable effect on field intensity uniformity. The composite material with nonlinear characteristic can be obtained by adding the pressure sensitive ceramic powder into the polymer, and the zinc oxide pressure sensitive ceramic powder composite has better nonlinear coefficient, so that the effect of uniform field intensity is best in a plurality of nonlinear conductive composite materials. According to different application scenes, the threshold field strength of the needed voltage-sharing material is different from hundreds of volts per millimeter to thousands of volts per millimeter, so that the threshold field strength of the nonlinear conductive composite needs to be adjusted. There are many researches on the adjustment of threshold field strength of zinc oxide pressure-sensitive ceramic powder compound, the researches are all carried out on the size and content of zinc oxide pressure-sensitive ceramic powder in the compound, zinc oxide pressure-sensitive ceramic powder crystal grains, crystal boundaries and the like, and the adjustment range of the threshold field strength of the nonlinear conductance composite material is limited. In addition, in order to obtain a composite with relatively low threshold field strength, large-size and high-content zinc oxide pressure-sensitive ceramic powder needs to be added into the polymer, which also reduces the mechanical properties of the composite and cannot meet the actual engineering requirements. Therefore, how to effectively reduce the threshold field strength of the compound and ensure that the compound has sufficient mechanical strength is a problem worthy of study.
[ Utility model ] content
The utility model aims to solve the technical problem that a nonlinear conductance structure is provided, adopt above-mentioned structure can reduce the proportion of filler, improve the mechanical strength of silicon rubber base member.
Solve the technical problem, the utility model discloses a following technical scheme:
the nonlinear conductive structure comprises a silicon rubber substrate and a filler filled in the silicon rubber substrate, wherein the filler is uniformly distributed in the silicon rubber substrate, the filler is a tetrapod-like zinc oxide whisker, the tetrapod-like zinc oxide whisker is of a three-dimensional tetrapod-like three-dimensional structure and comprises a core and 4 acicular crystals extending from the radial direction of the core, and the percolation threshold of the silicon rubber substrate can be reached when the volume fraction of the filler exceeds 5 vol%.
Adopt the beneficial effects of the utility model are that:
in the utility model, the nonlinear conductive structure comprises a silicon rubber substrate and a filler, the silicon rubber substrate is formed by liquid silicon rubber after vacuum drying and vulcanization, and has excellent mechanical property and stability, the filler is tetrapod-shaped zinc oxide whiskers, the silicon rubber substrate is stirred and mixed with the tetrapod-shaped zinc oxide whiskers, because the tetrapod-shaped zinc oxide whiskers have a spatial three-dimensional structure, the unique three-dimensional tetrapod-shaped three-dimensional structure can be uniformly distributed in the silicon rubber substrate, thereby isotropically improving the physical property of the silicon rubber substrate, simultaneously also enabling the silicon rubber substrate to have other excellent properties such as wear resistance, static resistance, ageing resistance and the like, secondly, the tetrapod-shaped zinc oxide whiskers are uniformly distributed in the silicon rubber substrate to enable the silicon rubber substrate to have a lower percolation threshold value, when the volume fraction of the tetrapod-shaped zinc oxide whiskers exceeds 5 vol%, silicon rubber substrate just can demonstrate the nonlinear conductivity characteristic, for traditional nonlinear conductivity material, the utility model discloses in when the percolation threshold value appears in the silicon rubber substrate, the shared volume fraction of inorganic filler is obviously less, consequently the phenomenon that the intensity reduces because of inorganic filler brings can be alleviated to the silicon rubber substrate, adopts the utility model discloses a guarantee when the compound can realize reducing compound percolation threshold value field intensity that compound has sufficient mechanical strength.
Preferably, the tetrapod-like zinc oxide whiskers are wet-modified tetrapod-like zinc oxide whiskers.
Preferably, the root diameter of the needle-shaped body of the tetrapod-like zinc oxide whisker is 0.5 to 5 μm.
Preferably, the needle-like length of the tetrapod-like zinc oxide whiskers is 10-50 μm.
Preferably, the thickness of the silicon rubber substrate is 1 mm.
Preferably, the raw material of the silicon rubber matrix is two-component liquid silicon rubber.
The utility model also provides an insulator, including nonlinear conductance structure, nonlinear conductance structure adopts as above-mentioned arbitrary one nonlinear conductance structure.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention will be further explained with reference to the drawings:
fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example 1:
as shown in fig. 1, this embodiment shows a nonlinear conductive structure, which includes a silicon rubber substrate 1 and a filler filled in the silicon rubber substrate 1, where the filler is uniformly distributed in the silicon rubber substrate 1, the filler is tetrapod-like zinc oxide whiskers 2, the tetrapod-like zinc oxide whiskers 2 are a three-dimensional tetrapod-like three-dimensional structure, and include a core and 4 acicular crystals extending from the core in a radial direction, and a percolation threshold of the silicon rubber substrate 1 can be reached when a volume fraction of the filler exceeds 5 vol%.
In the utility model, the nonlinear conductive structure comprises a silicon rubber matrix 1 and a filler, the silicon rubber matrix 1 is formed by liquid silicon rubber after vacuum drying and vulcanization, and has excellent mechanical property and stability, the filler is tetrapod-shaped zinc oxide whisker 2, the silicon rubber matrix 1 and the tetrapod-shaped zinc oxide whisker 2 are stirred and mixed in the utility model, because the tetrapod-shaped zinc oxide has the whisker with a spatial three-dimensional structure, the unique three-dimensional tetrapod-shaped three-dimensional structure can be uniformly distributed in the silicon rubber matrix 1, thereby isotropically improving the physical property of the silicon rubber matrix 1, simultaneously enabling the silicon rubber matrix 1 to have other excellent properties such as wear resistance, static resistance, ageing resistance and the like, secondly, the tetrapod-shaped zinc oxide whisker 2 is uniformly distributed in the silicon rubber matrix 1 to enable the silicon rubber matrix 1 to have a lower percolation threshold value, when the volume fraction of tetrapod-like zinc oxide whisker 2 surpassed 5 vol%, silicon rubber base member 1 just can demonstrate nonlinear conductivity characteristic, for traditional nonlinear conductivity material, the utility model discloses in when the percolation threshold value appeared in silicon rubber base member 1, the shared volume fraction of inorganic filler is obviously less, consequently silicon rubber base member 1 can alleviate the phenomenon that reduces because of the intensity that inorganic filler brought, adopts the utility model discloses a guarantee when the compound can realize reducing compound percolation threshold value field intensity that the compound has sufficient mechanical strength.
Regarding the silicon rubber substrate 1, the raw material of the silicon rubber substrate 1 in this embodiment is two-component liquid silicon rubber, the thickness of the silicon rubber is 1mm, the liquid silicon rubber is formed after vacuum drying and vulcanization in a mold, the silicon rubber has high temperature stability, can keep certain flexibility, resilience and surface hardness under a high temperature environment of more than 200 ℃, has no obvious change in mechanical properties, also has excellent insulating property, corona resistance and arc resistance, and is an excellent material as an insulating material; in the embodiment, the tetrapod-like zinc oxide whisker 2 is an inorganic filler prepared by using general wet-process modified paper, the tetrapod-like zinc oxide whisker 2 is in a three-dimensional tetrapod-like three-dimensional structure and comprises a core and 4 acicular crystals extending from the radial direction of the core, the root diameter of the needle-like body of the tetrapod-like zinc oxide whisker 2 is 0.5-5 μm, and the length of the needle-like body of the tetrapod-like zinc oxide whisker 2 is 10-50 μm, and due to the unique three-dimensional tetrapod-like three-dimensional structure, the tetrapod-like zinc oxide whisker is easily uniformly distributed in the silicon rubber matrix 1, so that the physical properties of the silicon rubber matrix 1 are isotropically improved, and other unique properties, such as wear resistance, skid resistance, antistatic property, ageing resistance and the like, of the silicon rubber matrix 1 are also endowed.
Example 2:
this example shows an insulator comprising a nonlinear conductive structure that employs a nonlinear conductive structure as described in example 1 or other examples that are the same as or similar to example 1.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (7)
1. A nonlinear conductive structure comprises a silicon rubber matrix and a filler filled in the silicon rubber matrix, and is characterized in that: the filler is uniformly distributed in the silicon rubber substrate, the filler is tetrapod-like zinc oxide whiskers, and the tetrapod-like zinc oxide whiskers are of a three-dimensional tetrapod-like three-dimensional structure and comprise a core and 4 acicular crystals extending from the core in the radial direction.
2. The nonlinear conductive structure of claim 1, wherein: the tetrapod-like zinc oxide whisker is modified by a wet method.
3. The nonlinear conductive structure of claim 1, wherein: the diameter of the root of the needle-shaped body of the tetrapod-shaped zinc oxide whisker is 0.5-5 mu m.
4. The nonlinear conductive structure of claim 1, wherein: the needle-like length of the tetrapod-like zinc oxide whisker is 10-50 mu m.
5. The nonlinear conductive structure of claim 1, wherein: the thickness of the silicon rubber substrate is 1 mm.
6. The nonlinear conductive structure of claim 1, wherein: the raw material of the silicon rubber matrix is two-component liquid silicon rubber.
7. An insulator comprising a nonlinear conductive structure, characterized in that: the nonlinear conductive structure adopts the nonlinear conductive structure as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022786291.5U CN214937151U (en) | 2020-11-26 | 2020-11-26 | Nonlinear conductive structure and insulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022786291.5U CN214937151U (en) | 2020-11-26 | 2020-11-26 | Nonlinear conductive structure and insulator |
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| CN214937151U true CN214937151U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118398505A (en) * | 2024-06-27 | 2024-07-26 | 清华大学 | Preparation method of power electronic module and power electronic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118398505A (en) * | 2024-06-27 | 2024-07-26 | 清华大学 | Preparation method of power electronic module and power electronic module |
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Granted publication date: 20211130 |
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