Composition, dielectric material, and use thereof

Abstract

The present application belongs to the technical field of dielectric materials. Disclosed are a composition, a dielectric material, and the use thereof. The composition comprises: an olefin polymer and a microwave dielectric ceramic material, wherein the olefin polymer comprises at least one of a cyclic olefin polymer, polypropylene, and polyethylene; and the volume percentage of the microwave dielectric ceramic material in the composition is 15-40%, the dielectric constant of the microwave dielectric ceramic material is 100-300, and the dielectric loss is less than 0.001. The dielectric material prepared based on the composition not only maintains the basic performance of a resin matrix, but also has a higher dielectric constant and a lower dielectric loss. The dielectric material prepared from the composition, on the basis of excellent dielectric properties thereof, can be used in an electronic device, such as a communication device and a radar device, thereby achieving the aim of reducing the insertion loss of an apparatus and improving the signal transmission efficiency.

Description

Compositions, media materials and their applications

[0001] This application claims priority to Chinese Patent Application No. 202510125740.6, filed on January 26, 2025, entitled "Composition, Media Material and Application Thereto", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of dielectric materials technology, and in particular to compositions, dielectric materials and their applications. Background Technology

[0003] Thermoplastic composite dielectric materials, which include thermoplastic resins and high dielectric fillers, typically have good processability and mechanical properties, high dielectric constant (Dk), and low dielectric loss (Df), and are widely used in electronic equipment, such as communication equipment and radar equipment.

[0004] The thermoplastic composite dielectric materials involved in related technologies typically use polyphenylene ether resin as the thermoplastic resin and ceramic filler as the high dielectric filler. However, these thermoplastic composite dielectric materials have high dielectric loss, typically greater than 0.0015. The high dielectric loss leads to greater insertion loss of the device, which reduces the signal transmission efficiency. Summary of the Invention

[0005] This disclosure provides compositions, media materials, and their applications, which can solve the technical problems existing in related technologies. The technical solution is shown below.

[0006] On one hand, a composition is provided, the composition comprising: an olefinic composition and a microwave dielectric ceramic material, wherein the olefinic polymer includes at least one selected from cyclic olefinic polymers, polypropylene, and polyethylene; the microwave dielectric ceramic material accounts for 15%-40% of the volume percentage of the composition, the dielectric constant of the microwave dielectric ceramic material is 100-300, and the dielectric loss is less than 0.001.

[0007] The composition provided in this disclosure uses at least one of a cyclic olefin polymer, polypropylene, and polyethylene as the resin matrix. These resin matrices all possess good processability, mechanical properties, and dielectric properties. For this type of resin matrix, a microwave dielectric ceramic material with a dielectric constant of 100-300 and a dielectric loss of less than 0.001 is used as a dielectric additive, and the microwave dielectric ceramic material accounts for 15%-40% of the volume percentage of the composition. This microwave dielectric ceramic material synergistically works with at least one of the cyclic olefin polymer, polypropylene, and polyethylene. The dielectric material prepared based on this composition not only maintains the basic properties of the resin matrix but also has a higher dielectric constant and lower dielectric loss. Based on its excellent dielectric properties, the dielectric material prepared by this composition can be applied to electronic devices, such as communication equipment and radar equipment, to reduce device insertion loss and improve signal transmission efficiency.

[0008] In some possible implementations, the microwave dielectric ceramic material includes at least one of calcium titanate, calcium strontium titanate, strontium titanate, barium titanate, and their modified materials; wherein the modifying elements in the modified materials include Cr and Sn. This type of microwave dielectric ceramic material has a high dielectric constant and low dielectric loss, and is suitable for synergistic effects with at least one of cyclic olefin polymers, polypropylene, and polyethylene. This allows the dielectric material prepared from the composition to not only maintain the basic properties of the resin matrix but also possess a higher dielectric constant and lower dielectric loss, making it suitable for use in high-temperature environments.

[0009] In some possible implementations, the atomic percentages of the Cr and Sn elements in the modified material are the same, which helps to further reduce the dielectric loss of the dielectric material.

[0010] In some possible implementations, the microwave dielectric ceramic material includes at least one of strontium calcium titanate and modified strontium calcium titanate. This type of microwave dielectric ceramic material exhibits superior dielectric properties.

[0011] In some possible implementations, the microwave dielectric ceramic material further includes at least one of calcium titanate, strontium titanate, barium titanate, and their modified materials. Calcium titanate, strontium titanate, barium titanate, and their modified materials are used as doped dielectric fillers in the microwave dielectric ceramic material. By adjusting the type and proportion of the doped dielectric filler, the dielectric properties, temperature stability, mechanical properties, and sintering properties of the microwave dielectric ceramic material can be flexibly adjusted to adapt to various different application scenarios.

[0012] In some possible implementations, the chemical formula of the modified strontium calcium titanate is Ca. 0.4 Sr 0.6 Ti (1-x) (Cr1 / 2 Sn 1 / 2 ) x O3, where 0.005≤x≤0.01. Modified materials of calcium strontium titanate with the above chemical formula have higher dielectric constant and lower dielectric loss. Furthermore, they exhibit excellent compatibility when synergistically combined with at least one of cyclic olefin polymers, polypropylene, and polyethylene. While ensuring good mechanical properties of the dielectric material, they also possess high dielectric constant and ultra-low dielectric loss.

[0013] In some possible implementations, the particle size of the microwave dielectric ceramic material is 5 μm-25 μm. By limiting the particle size of the microwave dielectric ceramic material as described above, it is possible to stabilize its dielectric constant and reduce dielectric loss, while also enhancing its mechanical properties and improving its sintering performance.

[0014] In some possible implementations, the composition further includes a fiber material selected from at least one of quartz fiber, alumina fiber, basalt fiber, and liquid crystal fiber, and the fiber material accounts for 5%-10% of the volume percentage of the composition. Through the above-mentioned fiber material scheme, while ensuring the stability of the dielectric properties of the dielectric material formed by the composition, the mechanical properties of the dielectric material are further enhanced, such as impact strength and tensile strength.

[0015] In some possible implementations, the fiber material has a diameter of 3μm-10μm and a length of 0.5mm-3mm. This ensures the achievement of the aforementioned effects, prevents stress concentration, and improves the processing properties of the composition (mixing uniformity, flowability, etc.).

[0016] In some possible implementations, the composition further includes a thermoplastic elastomer, the volume of which is 5%-15% of the volume of the olefin polymer. Further increasing the thermoplastic elastomer in the composition provides at least the following advantages: improved toughness and impact resistance, enhanced drop resistance, improved flexibility and processability, improved material compatibility and adhesion, enhanced dielectric stability, and enhanced temperature resistance of the dielectric material.

[0017] In some possible implementations, the olefin polymer is a cyclic olefin polymer. When the olefin polymer is a cyclic olefin polymer, a thermoplastic elastomer can be further used to achieve effects such as enhanced toughness and impact resistance.

[0018] On the other hand, a dielectric material is provided, comprising any of the compositions described above. The dielectric material provided in this disclosure has all the advantages of the compositions mentioned above.

[0019] Tests have shown that, based on the use of the above-described composition, the dielectric constant of the dielectric material provided in the embodiments of this disclosure reaches 5-9, and the dielectric loss is less than 0.0015, for example, it can reach 0.0004-0.0013, exhibiting excellent dielectric properties.

[0020] In some possible implementations, the medium material is in particulate form to facilitate its storage and use.

[0021] In another aspect, an electronic device is provided, the electronic device comprising electronic components and a dielectric material as described above for carrying the electronic components.

[0022] The electronic device provided in this disclosure has all the advantages of the dielectric material mentioned above. Based on the use of the high dielectric constant and low dielectric loss dielectric material mentioned above, it is beneficial to ensure stable and efficient signal transmission and reliable and accurate operation of electronic components in the electronic device.

[0023] In some possible implementations, the electronic device includes communication equipment and radar equipment. Detailed Implementation

[0024] Thermoplastic composite dielectric materials, comprising thermoplastic resins and dielectric fillers, typically possess good processability and mechanical properties, high dielectric constant (Dk), and low dielectric loss (Df), and are widely used in electronic devices such as communication and radar equipment. With the increasing demands for dielectric materials in the communications field, particularly in the context of highly integrated and energy-efficient antenna iterations, there is a growing expectation for thermoplastic composite dielectric materials to exhibit even higher dielectric constants and lower dielectric losses.

[0025] However, the thermoplastic composite dielectric materials involved in related technologies typically have dielectric losses greater than 0.0015 (e.g., as high as 0.0015-0.003). This high dielectric loss leads to significant insertion loss in the devices, making them unsuitable for high-efficiency antennas, especially ultra-efficient antennas. To address the technical problems of related technologies, this disclosure provides a novel composition. The dielectric material prepared from this composition not only possesses good processability and mechanical properties but also exhibits a high dielectric constant and low dielectric loss.

[0026] The composition provided in this disclosure includes: an olefin composition and a microwave dielectric ceramic material. The olefin polymer includes at least one of cyclic olefin polymers, polypropylene, and polyethylene. The microwave dielectric ceramic material accounts for 15%-40% of the volume of the composition. The dielectric constant of the microwave dielectric ceramic material is 100-300, and the dielectric loss is less than 0.001. It can be seen that this type of microwave dielectric ceramic material has a high dielectric constant and a low dielectric loss.

[0027] Microwave dielectric ceramic materials refer to ceramic materials that are used in the microwave frequency band (300MHz-300GHz) and have specific dielectric properties. Microwave dielectric ceramic materials are usually metal oxides. In the embodiments of this disclosure, the dielectric constant of the microwave dielectric ceramic material mentioned above is 100-300 and the dielectric loss is less than 0.001. These are relevant parameters obtained by measuring the bulk material of the microwave dielectric ceramic material. Furthermore, the test frequency of the dielectric constant and dielectric loss is less than or equal to 2GHz.

[0028] The composition provided in this disclosure uses at least one of a cyclic olefin polymer, polypropylene, and polyethylene as the resin matrix. These resin matrices all possess good processability, mechanical properties, and dielectric properties. For this type of resin matrix, a microwave dielectric ceramic material with a dielectric constant of 100-300 and a dielectric loss of less than 0.001 is used as a dielectric additive, and the microwave dielectric ceramic material accounts for 15%-40% of the volume percentage of the composition. This microwave dielectric ceramic material synergistically works with at least one of the cyclic olefin polymer, polypropylene, and polyethylene. The dielectric material prepared based on this composition not only maintains the basic properties of the resin matrix but also has a higher dielectric constant and lower dielectric loss. Based on its excellent dielectric properties, the dielectric material prepared by this composition can be applied to electronic devices, such as communication equipment and radar equipment, to reduce device insertion loss and improve signal transmission efficiency.

[0029] In some examples, the composition comprises a cyclic olefin copolymer (COC) and a microwave dielectric ceramic material, wherein the microwave dielectric ceramic material is in powder form. Cyclic olefin copolymers possess both excellent optical transparency and good dielectric properties, making them advantageous in applications requiring both high dielectric constants and high transparency. Furthermore, the cyclic structure of the molecular chain of cyclic olefin copolymers provides them with a degree of flexibility, facilitating their processing. Cyclic olefin copolymers can be processed using various methods, such as injection molding and extrusion molding, and can maintain good material uniformity during processing, exhibiting excellent dielectric uniformity. This is beneficial for fabricating high-precision, high-dielectric-constant devices, such as miniaturized microwave devices.

[0030] All known cyclic olefin polymers are applicable to the embodiments of this disclosure. The type of cyclic olefin polymer can be adaptively selected according to actual needs. For example, the molecular weight, density, viscosity, melt index, glass transition temperature, mechanical properties (tensile strength, elastic modulus, elongation at break), optical properties, etc. of the cyclic olefin polymer can be determined according to actual needs.

[0031] In some examples, the composition includes polypropylene and a microwave dielectric ceramic material, wherein the microwave dielectric ceramic material is in powder form, and the polypropylene has good flexibility and mechanical properties. For example, in the dielectric components of bent electronic circuits or wearable devices, polypropylene can provide dielectric function while ensuring the mechanical integrity of the material.

[0032] In some examples, the composition includes polyethylene and a microwave dielectric ceramic material, wherein the microwave dielectric ceramic material is in powder form, and the polyethylene has excellent electrical insulation properties. The nonpolar bonds in its structure result in low dielectric loss, which can effectively reduce device insertion loss when applied in high-frequency electric fields. Furthermore, polyethylene also exhibits good corrosion resistance, stability, processability, and compatibility with other materials.

[0033] In some examples, the composition includes any two or three of a cyclic olefin polymer, polypropylene, and polyethylene, and a microwave dielectric ceramic material, wherein the microwave dielectric ceramic material is in powder form.

[0034] Similarly, polypropylene and polyethylene can be selected flexibly according to actual needs. For example, their molecular weight and density can be selected. For instance, when the mechanical properties of the medium material are required to be high, high-density polypropylene or high-density polyethylene can be selected.

[0035] To avoid adverse effects on the processing and mechanical properties of the resin matrix, the microwave dielectric ceramic material accounts for 15%-40% of the volume percentage of the composition in the embodiments of this disclosure. This includes, but is not limited to, any one or any two of the following values ​​or the range formed by any two of the following values: 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc.

[0036] Some microwave dielectric ceramic materials applicable to embodiments of this disclosure include at least one of calcium titanate, calcium strontium titanate, strontium titanate, barium titanate, and their modified materials; wherein the modifying elements in the modified materials include Cr and Sn. These microwave dielectric ceramic materials have high dielectric constants and low dielectric losses, and are suitable for synergistic effects with at least one of cyclic olefin polymers, polypropylene, and polyethylene. This results in dielectric materials prepared from the compositions that not only maintain the basic properties of the resin matrix but also possess higher dielectric constants and lower dielectric losses, and are suitable for use in high-temperature environments.

[0037] Calcium titanate (CaTiO3), calcium strontium titanate (Ca x Sr 1-x TiO3, where the total number of Ca and Sr atoms is 1, x represents the percentage of Ca atoms out of the total number of Ca and Sr atoms, and 1-x represents the percentage of Sr atoms out of the total number of Ca and Sr atoms, 0 < x < 1; strontium titanate (SrTiO3) and barium titanate (BaTiO3) are common high-dielectric microwave dielectric ceramic materials. In particular, calcium strontium titanate has a higher dielectric constant and lower dielectric loss.

[0038] In particular, calcium titanate, calcium strontium titanate, strontium titanate, and barium titanate can be modified by Cr and Sn elements, which is more beneficial for improving the dielectric constant of the material and further reducing the dielectric loss of the material.

[0039] In some examples, for modified materials, the atomic percentages of Cr and Sn can be made the same, which helps to further reduce the dielectric loss of the dielectric material.

[0040] In some examples, embodiments of this disclosure provide a microwave dielectric ceramic material comprising at least one of calcium strontium titanate and modified calcium strontium titanate. For example, the microwave dielectric ceramic material is calcium strontium titanate, or it is a modified calcium strontium titanate, or it is a mixture of calcium strontium titanate and modified calcium strontium titanate. This type of microwave dielectric ceramic material exhibits superior dielectric properties.

[0041] In other examples, the microwave dielectric ceramic material includes at least one of calcium strontium titanate and modified calcium strontium titanate, and also includes at least one of calcium titanate, strontium titanate, barium titanate and their modified materials. In this case, calcium titanate, strontium titanate, barium titanate and their modified materials are used as doped dielectric fillers in the microwave dielectric ceramic material. By adjusting the type and proportion of the doped dielectric fillers, the dielectric properties, temperature stability, mechanical properties, sintering properties, etc. of the microwave dielectric ceramic material can be flexibly adjusted to adapt to a variety of different application scenarios.

[0042] In some examples, the chemical formula of the modified material of calcium strontium titanate is Ca. 0.4 Sr 0.6 Ti (1-x) (Cr 1 / 2 Sn 1 / 2 ) x O3, where 0.005≤x≤0.01. In this chemical formula, the total number of Ca and Sr atoms is 1, the total number of Ti, Cr, and Sn atoms is 1, and the number of O atoms is 3. Furthermore, the percentage of Ca atoms in the total number of Ca and Sr atoms is 0.4, the percentage of Sr atoms in the total number of Ca and Sr atoms is 0.6, the percentage of Ti atoms in the total number of Ti, Cr, and Sn atoms is 1-x, the percentage of Cr atoms in the total number of Ti, Cr, and Sn atoms is x / 2, and the percentage of Sn atoms in the total number of Ti, Cr, and Sn atoms is x / 2. The value of x includes, but is not limited to, any of the following values: 0.005, 0.0055, 0.006, 0.0065, 0.007, 0.0075, 0.008, 0.0085, 0.009, 0.0095, 0.01, etc.

[0043] Modified materials of calcium strontium titanate with the above chemical formula have higher dielectric constant and lower dielectric loss. Furthermore, they exhibit excellent compatibility when synergistically combined with at least one of cyclic olefin polymers, polypropylene, and polyethylene. While ensuring good mechanical properties of the dielectric material, they also have high dielectric constant and ultra-low dielectric loss.

[0044] The modified materials mentioned above can be prepared by the following method: Based on the chemical formula of the modified material, determine the reactants and their proportions, where the reactants are typically a mixture of various metal oxides. Mix and grind the reactants to achieve micron- or even nano-sized particles. Shape the reactants using methods such as dry pressing or isostatic pressing to form a green body. Sinter the green body; the sintering temperature and time depend on the type and performance requirements of the material. During sintering, the particles inside the green body fuse and densify, forming a ceramic material with certain strength and properties. Further, the sintered ceramic material is refined, for example, through grinding or spray granulation, to achieve the desired size and shape, ultimately obtaining the modified material described above.

[0045] As mentioned above, microwave dielectric ceramic materials are typically powder materials. In this embodiment of the present disclosure, it is desirable that the particle size of the microwave dielectric ceramic material is 5μm-25μm, which includes, but is not limited to, any one or any two of the following values: 5μm, 6μm, 7μm, 8μm, 9μm, 10μm, 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, 17μm, 18μm, 19μm, 20μm, 21μm, 22μm, 23μm, 24μm, 25μm, etc.

[0046] By limiting the particle size of microwave dielectric ceramic materials as described above, we can stabilize their dielectric constant and reduce dielectric loss, while also enhancing their mechanical properties and improving their sintering performance.

[0047] In some examples, the compositions provided in this disclosure further include fibrous materials selected from at least one of quartz fibers, alumina fibers, basalt fibers, and liquid crystal fibers, and the fibrous materials account for 5%-10% of the volume percentage of the composition.

[0048] By using the above-mentioned fiber material scheme, while ensuring the stability of the dielectric properties of the dielectric material formed by the composition, the mechanical properties of the dielectric material are further enhanced, such as impact strength and tensile strength.

[0049] For a further example, the fiber material is selected from at least one of quartz fiber and alumina fiber. Alternatively, the fiber material includes at least one of quartz fiber and alumina fiber, and at least one of basalt fiber and liquid crystal fiber. This type of fiber, while achieving the above-mentioned effects, can also avoid deterioration of other properties of the dielectric material.

[0050] To ensure the above effects are achieved, prevent stress concentration, and improve the processing properties of the composition (mixing uniformity, flowability, etc.), the diameter of the fiber material can be 3μm-10μm, and the length can be 0.5mm-3mm. For example, the diameter of the fiber material includes, but is not limited to, any one or any two of the following values ​​or a range thereof: 3μm, 4μm, 5μm, 6μm, 7μm, 8μm, 9μm, 10μm, etc. More specifically, the diameter of the fiber material can be 7μm-10μm. The diameter of the fiber material includes, but is not limited to, any one or any two of the following values ​​or a range thereof: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, etc.

[0051] In some examples, the compositions provided in this disclosure also include a thermoplastic elastomer, the volume of which is 5%-15% of the volume of the olefin polymer, for example, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc.

[0052] By further adding thermoplastic elastomers to the composition, at least the following advantages are achieved: improved toughness and impact resistance, enhanced drop resistance, improved flexibility and processability, improved material compatibility and adhesion, enhanced stability of dielectric properties, and enhanced temperature resistance of dielectric materials.

[0053] In some examples, thermoplastic elastomers suitable for embodiments of this disclosure may be olefin block copolymers (OBC), polyolefin elastomers (POE), etc. The molecular chains of olefin block copolymers include hard segments and soft segments. The hard segments are typically crystalline polyolefin segments, such as polyethylene (PE) or polypropylene (PP), while the soft segments are typically polyolefin segments with low crystallinity or amorphous. Further examples include vinyl block copolymers, propylene block copolymers, etc. In some examples, the melt index of the olefin block copolymer may be less than 5 to ensure good processability, mechanical properties, chemical stability, and resistance to environmental stress cracking.

[0054] In this embodiment of the disclosure, when the olefin polymer is a cyclic olefin polymer, a thermoplastic elastomer can be further used to enhance toughness and impact resistance. When the olefin polymer is polypropylene or polyethylene, the thermoplastic elastomer is an optional solution, and its selection can be determined based on actual needs.

[0055] In summary, the composition provided in this embodiment, by adding a high-dielectric-constant and low-loss microwave dielectric ceramic material as a dielectric additive, and in combination with at least one of cyclic olefin polymers, polypropylene, and polyethylene, results in a dielectric material that possesses both a high dielectric constant and low dielectric loss, while maintaining the inherent mechanical property advantages of cyclic olefin polymers, polypropylene, and polyethylene. Furthermore, the optional addition of fiber materials enhances strength, and the optional addition of thermoplastic elastomers achieves toughening modification, further improving the tensile strength and heat resistance of the dielectric material. This dielectric material can be applied to electronic devices, particularly high-frequency electronic devices such as communication equipment and radar equipment, facilitating the miniaturization of radio frequency devices / modules in these devices and providing more stable and high-quality communication performance over a wider temperature range.

[0056] On the other hand, embodiments of this disclosure also provide a dielectric material comprising any of the compositions described above. The dielectric material provided by embodiments of this disclosure possesses all the advantages of the compositions described above.

[0057] Tests have shown that, based on the use of the above-described composition, the dielectric constant of the dielectric material provided in the embodiments of this disclosure reaches 5-9, and the dielectric loss is less than 0.0015, for example, it can reach 0.0004-0.0013, exhibiting excellent dielectric properties.

[0058] Based on the above composition, the medium material can be prepared by injection molding or extrusion molding. Taking extrusion molding as an example, the preparation process can be as follows:

[0059] Olefin polymers and optional thermoplastic elastomers are uniformly mixed and then fed into the main feeding system of a twin-screw extruder. Microwave dielectric ceramic materials, optional fiber materials, and optional thermoplastic elastomers are uniformly mixed and then fed into the side feeding system of the twin-screw extruder. The feed flow rate is set according to the proportion of each component, so that the raw materials are melt-mixed, extruded, and granulated to obtain granular dielectric materials. The dielectric materials can be in granular form for ease of storage and use.

[0060] For example, the extrusion temperature of the twin-screw extruder can be 180°C-290°C, the screw speed can be 400rpm-600rpm, and the screw length-to-diameter ratio can be 30-50:1, for example 40:1.

[0061] The dielectric materials provided in this disclosure can be applied to electronic devices, particularly high-frequency electronic devices, including communication devices, radar devices, satellite communication devices, and satellite navigation devices. Taking communication devices as an example, the dielectric materials can be used as support layers for antenna arrays, insulating materials for antennas, or radome materials; as packaging materials for devices such as filters, high-frequency inductors, and transformers; and as dielectric materials for printed circuit boards. This reduces signal attenuation during high-speed digital signal and high-frequency analog signal transmission, improves signal transmission integrity and reliability, and enhances signal coverage and communication quality. This improves the performance and reliability of communication devices, enabling them to operate stably in complex industrial environments and meet requirements for high data rates, low latency, and high reliability. For another example, the dielectric materials can be used to manufacture in-vehicle communication devices, such as in-vehicle infotainment systems and in-vehicle navigation systems, to improve the performance and reliability of these devices, ensuring stable operation during vehicle operation and meeting the high requirements for durability and stability of in-vehicle communication devices.

[0062] Beyond the applications described above, the dielectric materials provided in this disclosure can also be used in fields such as electronic packaging, microwave absorbing materials, and composite reinforcing materials. For example, in the field of electronic packaging, the thermal stability and mechanical strength of the dielectric material can be adjusted by changing the type of olefin polymer and the type of fiber. In the field of microwave absorbing materials, the type of microwave dielectric ceramic material and doping elements can be adjusted to meet the microwave absorption requirements of different frequencies. In the field of composite reinforcing materials, the mechanical properties of the dielectric material can be improved by changing the diameter and length of the fiber material.

[0063] In another aspect, embodiments of this disclosure provide an electronic device including electronic components and a dielectric material for carrying the electronic components, the dielectric material being any of the dielectric materials described above.

[0064] The electronic device provided in this disclosure has all the advantages of the dielectric material mentioned above. Based on the use of the high dielectric constant and low dielectric loss dielectric material mentioned above, it is beneficial to ensure stable and efficient signal transmission and reliable and accurate operation of electronic components in the electronic device.

[0065] For example, this electronic device can be a high-frequency electronic device, including communication equipment, radar equipment, satellite communication equipment, and satellite navigation equipment. When this dielectric material is applied to communication devices such as smartphones and tablets, it helps improve signal transmission efficiency. When applied to satellite communication and satellite navigation equipment, it helps enhance their signal processing capabilities and improve their operational reliability. When applied to radar equipment, it helps improve its detection accuracy and range, and also enhances its operational reliability.

[0066] Exemplary embodiments of this disclosure will now be described in more detail. While exemplary embodiments of this disclosure are described below, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with techniques or conditions described in the literature in the art or according to product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0067] It should be noted that the following examples and comparative examples all provide a composition, the composition of which can be found in Table 1. The cyclic olefin polymer (COC) involved is sourced from Germany. COC resin 6017. The polyethylene used is commercially available Borealis HE1123. The polypropylene used is commercially available Formosa Plastics Yongjia 1120. The olefin block copolymer (OBC) used has a P90 of Dow OBC 9077 and an E5 of Dow OBC 9500. Furthermore, in the examples and comparative examples containing the olefin block copolymer (OBC), the volume of the olefin block copolymer (OBC) is 15% of the volume of the resin matrix. Additionally, the microwave dielectric ceramic material used is calcium strontium titanate (Ca). 0.4 Sr 0.6 Modified materials containing TiO3 or calcium strontium titanate, with the chemical formula Ca 0.4 Sr 0.6 Ti (1-x) (Cr 1 / 2 Sn 1 / 2 ) x O3, where 0.005≤x≤0.01. Among them, the dielectric constant of calcium strontium titanate is 200-240 and the dielectric loss is 0.0009-0.0012. The dielectric constant of modified materials of this type of calcium strontium titanate is 190-230 and the dielectric loss is 0.0007-0.0009.

[0068] In addition, the HDT mentioned in Table 1 is the heat distortion temperature, which represents the heat resistance of the material and is used to determine whether it is suitable for use in high-temperature scenarios.

[0069] Table 1

[0070] The above description is only for the purpose of enabling those skilled in the art to understand the technical solutions disclosed herein, and is not intended to limit the scope of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A composition wherein, The composition comprises: an olefinic composition and a microwave dielectric ceramic material, wherein the olefinic polymer includes at least one of cyclic olefinic polymers, polypropylene, and polyethylene; The microwave dielectric ceramic material accounts for 15%-40% of the volume of the composition, and the dielectric constant of the microwave dielectric ceramic material is 100-300, with a dielectric loss of less than 0.

001.

2. The composition according to claim 1, wherein, The microwave dielectric ceramic material includes at least one of calcium titanate, calcium strontium titanate, strontium titanate, barium titanate, and their modified materials; The modifying elements in the modified material include Cr and Sn.

3. The composition according to claim 2, wherein, The atomic percentages of Cr and Sn are the same in the modified material.

4. The composition according to claim 2, wherein, The microwave dielectric ceramic material includes at least one of strontium calcium titanate and modified strontium calcium titanate.

5. The composition according to claim 4, wherein, The microwave dielectric ceramic material also includes at least one of calcium titanate, strontium titanate, barium titanate, and their modified materials.

6. The composition according to claim 4, wherein, The chemical formula of the modified material, strontium calcium titanate, is Ca. 0.4 Sr 0.6 Ti (1- x) (Cr 1 / 2 Sn 1 / 2 ) x O3, where 0.005≤x≤0.

01.

7. The composition according to any one of claims 1-6, wherein, The particle size of the microwave dielectric ceramic material is 5μm-25μm.

8. The composition according to any one of claims 1-7, wherein, The composition further includes a fiber material selected from at least one of quartz fiber, alumina fiber, basalt fiber, and liquid crystal fiber, and the fiber material accounts for 5%-10% of the volume percentage of the composition.

9. The composition according to claim 8, wherein, The fiber material has a diameter of 3μm-10μm and a length of 0.5mm-3mm.

10. The composition according to any one of claims 1-9, wherein, The composition further includes a thermoplastic elastomer, the volume of which is 5%-15% of the volume of the olefin polymer.

11. The composition according to claim 10, wherein, The olefin polymer is a cyclic olefin polymer.

12. A dielectric material, wherein, The medium material includes the composition according to any one of claims 1-11.

13. The dielectric material according to claim 12, wherein, The medium material is in granular form.

14. An electronic device, wherein, The electronic device includes electronic components and a dielectric material according to any one of claims 12-13 for carrying the electronic components.

15. The electronic device according to claim 14, wherein, The electronic equipment includes communication equipment and radar equipment.

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