CN113809500A - High-waterproofness medium slurry for medium resonator and preparation method thereof - Google Patents
High-waterproofness medium slurry for medium resonator and preparation method thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
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Abstract
The invention relates to a high waterproof medium slurry for a medium resonator and a preparation method thereof, wherein the glass powder used by the medium slurry is obtained by aging Ca-Si-B-Al series glass powder at the temperature of 100-; adding ethylene, vinyl acetate, azodiisobutyronitrile, betaine and other substances into the slurry to prepare ethylene-vinyl acetate copolymer (EVA); titanium dioxide, chromium oxide, cadmium oxide and the like are added as oxide additives to further enhance the stability of the slurry. The medium slurry prepared by the method has higher waterproofness, can improve the state of a sintered film, and has higher solid content after sintering. The dielectric slurry has wider application range and stronger applicability, is applied to the field of microwave sources, greatly reduces the use limitation of the dielectric slurry, expands the application range and has obvious economic benefit.
Description
Technical Field
The invention relates to the technical field of medium slurry, in particular to high-waterproofness medium slurry for a medium resonator and a preparation method thereof.
Background
The dielectric resonator is a new type resonator developed in recent years, is a resonator made of low-loss and high-dielectric constant materials, and is widely applied to microwave source design due to the advantages of small volume, light weight, high inherent quality factor, simple structure, low price and the like.
The dielectric resonator can be coupled with a microstrip circuit conveniently due to the structural characteristics of the dielectric resonator, and a miniaturized, low-noise, high-stability, high-reliability and low-cost microwave source is formed, so that the dielectric resonator is popular with the majority of users. Nowadays, the method is widely applied to the fields of ground microwave communication, sea and air microwave communication, satellite communication and military high-tech. The practical application of the microwave source promotes the appearance and the development of new high-tech fields of the microwave source.
However, with wide application, various use environments gradually enlarge their use limitations, especially in the field of marine communications, due to the influence of moisture and humidity, the service life of the dielectric resonator is greatly shortened, and the use environments have many limitations, and it is urgently needed to improve its waterproofness to ensure its working stability, and further ensure the safety of military and civilian.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the high-waterproofness medium slurry for the medium resonator, which is applied to various microwave sources, can prolong the service life of the microwave sources under the condition of expanding the application range and has obvious economic benefit, and the preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a high-waterproofness medium slurry for a medium resonator comprises the following components in parts by mass: 60-80 parts of glass powder, 5-15 parts of oxide additive, 14-20 parts of organic carrier and 1-5 parts of EVA additive.
Further, the glass powder is obtained by aging Ca-Si-B-Al glass powder at 100-.
Further, the Ca-Si-B-Al glass powder comprises the following components in percentage by mass: 66-82% of calcium carbonate, 6-12% of silicon dioxide, 6-10% of alumina and 6-12% of boric acid.
Further, the preparation method of the Ca-Si-B-Al glass powder comprises the following steps: uniformly mixing calcium carbonate, silicon dioxide, alumina and boric acid according to mass percentage, putting the obtained mixture into a smelting furnace for smelting at 1300 ℃ and 1500 ℃ for 0.5-2 h, performing water quenching on the obtained glass solution to obtain glass slag, refining the glass slag until the granularity D50 is less than or equal to 1.0 mu m, sieving the glass slag by a 600-mesh sieve, and drying.
Further, the organic carrier comprises the following components in percentage by mass: 15-20% of lecithin, 50-70% of terpineol and 15-30% of alpha-cellulose.
Further, the preparation method of the organic carrier comprises the following steps: according to the mass percentage, firstly adding terpineol into a container, heating to 60-80 ℃ under stirring, then adding lecithin, continuing to stir for 0.5-2 h, then adding alpha-cellulose, continuing to stir for 2-4 h, and obtaining the organic carrier.
Further, the oxide additive comprises one or more of titanium dioxide, chromium oxide or cadmium oxide.
Further, the EVA additive comprises the following components in percentage by mass: 30-50% of ethylene, 30-40% of vinyl acetate, 10-15% of azobisisobutyronitrile and 10-15% of betaine.
Further, the preparation method of the EVA additive comprises the following steps: according to the mass percentage, firstly, adding vinyl acetate as a polymer monomer into a container, heating to 60-80 ℃ under stirring, then adding betaine as an emulsifier, and then adding ethylene as a plasticizer to disperse the vinyl acetate to form emulsion; and finally, adding azodiisobutyronitrile as an initiator to polymerize the monomers to finally obtain the EVA additive.
A preparation method of high waterproof medium slurry for the medium resonator comprises the following steps: and mixing the glass powder, the organic carrier, the trioxide additive and the EVA additive in parts by mass, mixing, and rolling until the fineness is below 6 mu m to obtain the high-waterproofness medium slurry for the medium resonator.
Compared with the prior art, the invention has the following advantages:
(1) the glass powder used in the invention is of a lead-free and bismuth-free type, which is beneficial to environmental protection;
(2) the EVA is added in the preparation process of the slurry, the EVA additive has a closed cell structure, does not absorb water, is moisture-proof and has good water resistance, and the water resistance of the medium slurry is greatly improved by adding the EVA additive into the medium slurry.
(3) The invention carries out aging treatment on Ca-Si-B-Al series glass powder, can eliminate residual internal stress in the glass quenching and ball milling processes, and improves the compactness of glass, thereby effectively improving the state of a sintered film; on the other hand, the increased denseness means a decrease in porosity, which contributes to an increase in the water resistance of the slurry.
(4) The dielectric slurry prepared by the method can be applied to various microwave sources, can prolong the service life of the microwave source under the condition of expanding the application range, and has obvious economic benefit.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
A preparation method of high waterproof medium slurry for a medium resonator comprises the following steps: and mixing the glass powder, the organic carrier, the trioxide additive and the EVA additive in parts by mass, mixing, and rolling until the fineness is below 6 mu m to obtain the high-waterproofness medium slurry for the medium resonator.
The slurry comprises the following components in parts by mass: 60-80 parts of glass powder, 5-15 parts of oxide additive, 14-20 parts of organic carrier and 1-5 parts of EVA additive.
Wherein the glass powder is obtained by aging Ca-Si-B-Al glass powder at 100-200 ℃ for 10-15 h. The Ca-Si-B-Al series glass powder comprises the following components in percentage by mass: 66-82% of calcium carbonate, 6-12% of silicon dioxide, 6-10% of alumina and 6-12% of boric acid. The preparation method of the Ca-Si-B-Al series glass powder comprises the following steps: uniformly mixing calcium carbonate, silicon dioxide, alumina and boric acid according to mass percentage, putting the obtained mixture into a smelting furnace for smelting at 1300 ℃ and 1500 ℃ for 0.5-2 h, performing water quenching on the obtained glass solution to obtain glass slag, refining the glass slag until the granularity D50 is less than or equal to 1.0 mu m, sieving the glass slag by a 600-mesh sieve, and drying.
Wherein the organic carrier comprises the following components in percentage by mass: 15-20% of lecithin, 50-70% of terpineol and 15-30% of alpha-cellulose. The preparation method of the organic carrier comprises the following steps: according to the mass percentage, firstly adding terpineol into a container, heating to 60-80 ℃ under stirring, then adding lecithin, continuing to stir for 0.5-2 h, then adding alpha-cellulose, continuing to stir for 2-4 h, and obtaining the organic carrier.
Wherein, the oxide additive comprises one or more of titanium dioxide, chromium oxide or cadmium oxide.
Wherein the EVA additive comprises the following components in percentage by mass: 30-50% of ethylene, 30-40% of vinyl acetate, 10-15% of azobisisobutyronitrile and 10-15% of betaine. The preparation method of the EVA additive comprises the following steps: according to the mass percentage, firstly, adding vinyl acetate as a polymer monomer into a container, heating to 60-80 ℃ under stirring, then adding betaine as an emulsifier, and then adding ethylene as a plasticizer to disperse the vinyl acetate to form emulsion; and finally, adding azodiisobutyronitrile as an initiator to polymerize the monomers to finally obtain the EVA additive.
Example 1
A preparation method of high waterproof medium slurry for a dielectric resonator comprises the following steps:
preparing glass powder: accurately mixing 75% of calcium carbonate, 15% of silicon dioxide, 4% of alumina and 6% of boric acid in a corundum tank according to the mass percentage to obtain 700g of materials, then sealing the corundum tank, and mixing the materials on an eight-roller ball mill for 1 hour; putting the mixture into a quartz crucible after mixing, putting the quartz crucible into a resistance furnace at 1450 ℃, preserving heat, smelting for 1 hour, performing water quenching on the obtained glass solution to obtain glass slag, putting the glass slag into a zirconia ball milling tank, adding pure water according to the mass ratio of material to water of 1: 1, putting the glass slag on an eight-roller ball mill, performing ball milling until the granularity D50 is less than or equal to 1.0 mu m, pouring out, sieving by using a 600-mesh sieve, and putting the sieved liquid into an oven to dry for 20 hours at 120 ℃ to obtain Ca-Si-B-Al series glass powder; and (3) putting the Ca-Si-B-Al series glass powder into the quartz crucible again, putting the quartz crucible into a 150 ℃ box type resistance furnace for aging treatment for 12 hours, taking out the quartz crucible, and sieving the quartz crucible by using a 60-mesh sieve to obtain the glass powder.
Preparation of organic vehicle: the organic carrier is prepared by adding terpineol into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, adding lecithin, stirring for 1 hour, adding alpha-cellulose, and continuously stirring for 3 hours to obtain the organic carrier.
Preparing an EVA additive: firstly, adding 35% of vinyl acetate as a polymer monomer into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, then adding 13% of betaine as an emulsifier, and adding 40% of ethylene as a plasticizer to disperse the vinyl acetate to form emulsion; then 12% of azodiisobutyronitrile is added as an initiator to polymerize the monomer, and finally the ethylene-vinyl acetate copolymer (EVA) is obtained.
Preparing medium slurry: the medium slurry is prepared from 70% of glass powder, 18% of organic carrier, 10% of cadmium trioxide and 2% of EVA additive in percentage by mass, and after the materials are prepared, a rolling mill is used for mixing the materials, and the materials are rolled until the fineness reaches below 6 mu m, so that 100 g of the medium slurry is obtained.
Example 2
A preparation method of high waterproof medium slurry for a dielectric resonator comprises the following steps:
preparing glass powder: accurately mixing 66% of calcium carbonate, 12% of silicon dioxide, 10% of alumina and 12% of boric acid in a corundum tank according to the mass percentage for 700g, then sealing the corundum tank, and mixing materials on an eight-roller ball mill for 1 hour; putting the mixture into a quartz crucible after mixing, putting the quartz crucible into a resistance furnace at 1300 ℃ for heat preservation smelting for 1 hour, performing water quenching on the obtained glass solution to obtain glass slag, putting the glass slag into a zirconia ball milling tank, adding pure water according to the mass ratio of material to water of 1: 1, putting the glass slag on an eight-roller ball mill for ball milling until the granularity D50 is less than or equal to 1.0 mu m, pouring out the glass slag, sieving the glass slag by using a 600-mesh sieve, and putting the sieved liquid into an oven for drying for 20 hours at 120 ℃ to obtain Ca-Si-B-Al series glass powder; and (3) putting the Ca-Si-B-Al series glass powder into the quartz crucible again, putting the quartz crucible into a 200 ℃ box type resistance furnace for aging treatment for 15 hours, taking out the quartz crucible, and sieving the quartz crucible by using a 60-mesh sieve to obtain the glass powder.
Preparation of organic vehicle: the organic carrier is prepared by adding terpineol into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, adding lecithin, stirring for 1 hour, adding alpha-cellulose, and continuously stirring for 3 hours to obtain the organic carrier.
Preparing an EVA additive: firstly, adding 30% of vinyl acetate as a polymer monomer into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, then adding 15% of betaine as an emulsifier, and adding 30% of ethylene as a plasticizer to disperse the vinyl acetate to form emulsion; then 15% of azodiisobutyronitrile is added as an initiator to polymerize the monomer, and finally the ethylene-vinyl acetate copolymer (EVA) is obtained.
Preparing medium slurry: the medium slurry is prepared from 60% of glass powder, 20% of organic carrier, 15% of cadmium trioxide and 5% of EVA additive in percentage by mass, and after the materials are prepared, a rolling mill is used for mixing the materials, and the materials are rolled until the fineness reaches below 6 mu m, so that 100 g of the medium slurry is obtained.
Example 3
A preparation method of high waterproof medium slurry for a dielectric resonator comprises the following steps:
preparing glass powder: the method comprises the following steps of accurately batching 700g of calcium carbonate, silicon dioxide, aluminum oxide and boric acid in a corundum tank according to the mass percent of 82%, 6% and 6%, then sealing the corundum tank, and mixing materials on an eight-roller ball mill for 1 hour; putting the mixture into a quartz crucible after mixing, putting the quartz crucible into a 1500 ℃ resistance furnace for heat preservation smelting for 1 hour, performing water quenching on the obtained glass solution to obtain glass slag, putting the glass slag into a zirconia ball milling tank, adding pure water according to the mass ratio of material to water of 1: 1, putting the glass slag on an eight-roller ball mill for ball milling until the granularity D50 is less than or equal to 1.0 mu m, pouring out the glass slag, sieving the glass slag by using a 600-mesh sieve, and putting the sieved liquid into an oven for drying for 20 hours at 120 ℃ to obtain Ca-Si-B-Al series glass powder; and (3) putting the Ca-Si-B-Al series glass powder into the quartz crucible again, putting the quartz crucible into a box-type resistance furnace at the temperature of 100 ℃ for aging treatment for 10 hours, taking out the quartz crucible, and sieving the quartz crucible by using a 60-mesh sieve to obtain the glass powder.
Preparation of organic vehicle: the organic carrier is prepared by adding terpineol into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, adding lecithin, stirring for 1 hour, adding alpha-cellulose, and continuously stirring for 3 hours to obtain the organic carrier.
Preparing an EVA additive: firstly, 40% of vinyl acetate is added into a stainless steel barrel to be used as a polymer monomer, the mixture is heated to 70 ℃ at the stirring speed of 40r/min, 10% of betaine is added to be used as an emulsifier, and 40% of ethylene is added to be used as a plasticizer, so that the vinyl acetate is dispersed to form emulsion; then 10% of azodiisobutyronitrile is added as an initiator to polymerize the monomer, and finally the ethylene-vinyl acetate copolymer (EVA) is obtained.
Preparing medium slurry: the dielectric slurry is prepared from 80% of glass powder, 14% of organic carrier, 5% of cadmium trioxide and 1% of EVA additive in percentage by mass, and after the materials are prepared, a rolling mill is used for mixing the materials, and the materials are rolled until the fineness reaches below 6 mu m, so that 100 g of the dielectric slurry is obtained.
Example 4
A preparation method of high waterproof medium slurry for a dielectric resonator comprises the following steps:
preparing glass powder: accurately mixing 700g of calcium carbonate, 10% of silicon dioxide, 10% of aluminum oxide and 10% of boric acid in a corundum tank according to the mass percentage, then sealing the corundum tank, and mixing materials on an eight-roller ball mill for 1 hour; putting the mixture into a quartz crucible after mixing, putting the quartz crucible into a resistance furnace at 1400 ℃, carrying out heat preservation smelting for 1 hour, carrying out water quenching on the obtained glass solution to obtain glass slag, putting the glass slag into a zirconia ball milling tank, adding pure water according to the mass ratio of material to water of 1: 1, putting the glass slag on an eight-roller ball mill, carrying out ball milling until the granularity D50 is less than or equal to 1.0 mu m, pouring out the glass slag, sieving the glass slag by using a 600-mesh sieve, and putting the sieved liquid into an oven to be dried for 20 hours at 120 ℃ to obtain Ca-Si-B-Al series glass powder; and (3) putting the Ca-Si-B-Al series glass powder into the quartz crucible again, putting the quartz crucible into a box-type resistance furnace at the temperature of 140 ℃ for aging treatment for 12 hours, taking out the quartz crucible, and sieving the quartz crucible by using a 60-mesh sieve to obtain the glass powder.
Preparation of organic vehicle: the organic carrier is prepared by adding terpineol into a stainless steel barrel, heating to 70 ℃ at a stirring speed of 40r/min, adding lecithin, stirring for 1 hour, adding alpha-cellulose, and continuously stirring for 3 hours to obtain the organic carrier.
Preparing an EVA additive: firstly, 40% of vinyl acetate is added into a stainless steel barrel to be used as a polymer monomer, the mixture is heated to 70 ℃ at the stirring speed of 40r/min, 10% of betaine is added to be used as an emulsifier, and 40% of ethylene is added to be used as a plasticizer, so that the vinyl acetate is dispersed to form emulsion; then 10% of azodiisobutyronitrile is added as an initiator to polymerize the monomer, and finally the ethylene-vinyl acetate copolymer (EVA) is obtained.
Preparing medium slurry: the medium slurry is prepared from 72% of glass powder, 14% of organic carrier, 10% of cadmium trioxide and 4% of EVA additive in percentage by mass, and after the materials are prepared, a rolling mill is used for mixing the materials, and the materials are rolled until the fineness reaches below 6 mu m, so that 100 g of the medium slurry is obtained.
Comparative example 1
In example 1, the Ca — Si-B-Al based glass powder was not subjected to aging treatment, and a dielectric paste was prepared in the same manner as in example 1 except for the procedure.
Comparative example 2
In example 1, the other steps were the same as in example 1, and no EVA was added in the preparation of the dielectric paste, thereby preparing a dielectric paste.
Comparative example 3
In example 1, Ca — Si-B-Al based glass powder was not subjected to aging treatment, and EVA was not added in the preparation process of the dielectric paste, and a dielectric paste was prepared in the same manner as in example 1 except for the above steps.
Comparative example 4
In example 2, the other steps were the same as in example 2, and no EVA was added in the preparation of the dielectric paste, thereby preparing a dielectric paste.
Comparative example 5
In example 3, the other steps were the same as in example 3, and EVA was not added in the preparation of the dielectric paste, thereby preparing a dielectric paste.
After printing and sintering, the dielectric slurry prepared by the above examples and comparative examples was used, and the substrate was immersed in 1% alkaline water, and the following observation results during immersion were obtained as follows:
TABLE 1 Performance testing of slurries of different media
| Scheme(s) | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| Unqualified soaking time/day | 10 | 9 | 9 | 8 | 7 | 6 | 4 | 5 | 5 |
Note: the product is qualified after being soaked for more than 7 days without layering and hollowing.
As can be seen from Table 1, the media slurries prepared in examples 1-4 all meet acceptable water repellency requirements; the media slurries prepared in comparative examples 1 to 5 had a great disadvantage in water resistance. It can be seen from the combination of examples 1-4 and comparative examples 1-5 that when aging treatment is performed on Ca-Si-B-Al glass powder, EVA is added during the slurry preparation process, and the EVA additive has a closed cell structure and good water absorption, moisture resistance and water resistance, and when added to the dielectric slurry, the water resistance of the dielectric slurry is greatly improved, and the obtained dielectric slurry with high water resistance is applied to a dielectric resonator.
TABLE 2 surface condition of different media slurries after sintering
| Scheme(s) | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| Surface state of sintered film | Light brightness | Light brightness | Light brightness | Light brightness | Matte finish | Light brightness | Matte finish | Light brightness | Light brightness |
As can be seen from Table 2, the sintered film state and whether or not the aging treatment was carried out are closely related with the media slurries prepared in examples 1 to 4 and comparative examples 1 to 5. The aging treatment can eliminate the residual internal stress in the glass quenching and ball milling processes and improve the compactness of the glass, so that the state of a sintered film can be effectively improved; on the other hand, the increased denseness means a decrease in porosity, which contributes to an increase in the water resistance of the slurry.
TABLE 3 solid content of slurries of different media after sintering
| Scheme(s) | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| Solids content/% | 76.5 | 75.3 | 74.6 | 73.8 | 73.4 | 69.3 | 66.5 | 67.3 | 67.9 |
As can be seen from Table 3, the sintered solid content of the media slurries prepared in examples 1 to 4 and comparative examples 1 to 5 is very dependent on the specific process. As can be seen from the data in the table, the solid content of the medium slurry added with EVA is significantly higher than that of the medium slurry not added with EVA. The EVA introduces vinyl acetate monomer into the molecular chain, so that the high crystallinity is reduced, the flexibility, the impact resistance, the filler intermiscibility and the heat sealing performance are improved, a layer of invisible film is formed on the surface of the medium slurry, and a certain effect is played on stabilizing the solid content in the sintering process.
Comprehensively, the aging treatment is carried out on the Ca-Si-B-Al glass powder, and simultaneously, the EVA is added into the medium slurry, so that the obtained medium slurry has higher waterproofness, and the performances of the surface sintering film state, the solid content and the like are also stably improved.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. The high-waterproofness medium slurry for the dielectric resonator is characterized by comprising the following components in parts by mass: 60-80 parts of glass powder, 5-15 parts of oxide additive, 14-20 parts of organic carrier and 1-5 parts of EVA additive.
2. The dielectric paste of claim 1, wherein the glass frit is obtained by aging Ca-Si-B-Al based glass frit at 200 ℃ and 100 ℃ for 10-15 h.
3. The highly water-repellent dielectric paste for dielectric resonators as claimed in claim 2, wherein said Ca-Si-B-Al based glass powder comprises, in mass percent: 66-82% of calcium carbonate, 6-12% of silicon dioxide, 6-10% of alumina and 6-12% of boric acid.
4. The highly water-repellent dielectric paste for dielectric resonators as claimed in claim 3, wherein said Ca-Si-B-Al based glass powder is prepared by: uniformly mixing calcium carbonate, silicon dioxide, alumina and boric acid according to mass percentage, putting the obtained mixture into a smelting furnace for smelting at 1300 ℃ and 1500 ℃ for 0.5-2 h, performing water quenching on the obtained glass solution to obtain glass slag, refining the glass slag until the granularity D50 is less than or equal to 1.0 mu m, sieving the glass slag by a 600-mesh sieve, and drying.
5. The highly water-repellent dielectric paste for a dielectric resonator according to claim 1, wherein the organic vehicle comprises, in mass%: 15-20% of lecithin, 50-70% of terpineol and 15-30% of alpha-cellulose.
6. The highly water-repellent dielectric paste for dielectric resonators as claimed in claim 5, wherein said organic vehicle is prepared by the method comprising: according to the mass percentage, firstly adding terpineol into a container, heating to 60-80 ℃ under stirring, then adding lecithin, continuing to stir for 0.5-2 h, then adding alpha-cellulose, continuing to stir for 2-4 h, and obtaining the organic carrier.
7. The highly water-repellent dielectric paste for dielectric resonators as claimed in claim 1, wherein said oxide additive comprises any one or more of titanium dioxide, chromium oxide or cadmium oxide.
8. The high-waterproofness medium paste for the dielectric resonator according to claim 1, wherein the EVA additive comprises, by mass: 30-50% of ethylene, 30-40% of vinyl acetate, 10-15% of azobisisobutyronitrile and 10-15% of betaine.
9. The high water resistance dielectric paste for the dielectric resonator according to claim 8, wherein the EVA additive is prepared by: according to the mass percentage, firstly, adding vinyl acetate as a polymer monomer into a container, heating to 60-80 ℃ under stirring, then adding betaine as an emulsifier, and then adding ethylene as a plasticizer to disperse the vinyl acetate to form emulsion; and finally, adding azodiisobutyronitrile as an initiator to polymerize the monomers to finally obtain the EVA additive.
10. A method for preparing a highly water-repellent dielectric paste for a dielectric resonator according to any one of claims 1 to 9, comprising: and mixing the glass powder, the organic carrier, the trioxide additive and the EVA additive in parts by mass, mixing, and rolling until the fineness is below 6 mu m to obtain the high-waterproofness medium slurry for the medium resonator.
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