CN114133699B - 5G communication housing containing nano inorganic mullite alumina hollow microbeads - Google Patents

5G communication housing containing nano inorganic mullite alumina hollow microbeads Download PDF

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CN114133699B
CN114133699B CN202111264475.8A CN202111264475A CN114133699B CN 114133699 B CN114133699 B CN 114133699B CN 202111264475 A CN202111264475 A CN 202111264475A CN 114133699 B CN114133699 B CN 114133699B
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epoxy resin
alumina hollow
hollow microbeads
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CN114133699A (en
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熊云峰
陈汉明
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Aneng Guangzhou Science And Technology Co ltd
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Aneng Guangzhou Science And Technology Co ltd
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Abstract

The invention belongs to the technical field of outer covers for 5G communication, and particularly discloses a 5G communication outer cover containing nano inorganic mullite alumina hollow microbeads, which is prepared from the following raw materials in parts by weight: 1-3 parts of an anti-aging agent, 1-3 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3-15 parts of linear phenol formaldehyde resin, 5-25 parts of bisphenol A phenolic epoxy resin, 10-20 parts of modified glass fiber, 10-30 parts of o-cresol formaldehyde epoxy resin, 10-35 parts of phosphorus-containing and nitrogen-containing phenolic epoxy resin, 15-35 parts of an auxiliary agent, 10-45 parts of phenol type phenolic epoxy resin and 15-80 parts of nano inorganic mullite alumina hollow microbeads. The 5G communication housing containing the nano inorganic mullite alumina hollow microbeads has good dielectric constant, dielectric loss and strength.

Description

5G communication housing containing nano inorganic mullite alumina hollow microbeads
Technical Field
The invention relates to the technical field of outer covers for 5G communication, in particular to an outer cover for 5G communication, which contains nano inorganic mullite alumina hollow microbeads.
Background
From the advent of the mobile phone in 1973, the signal of 1G appeared, to the evolution of 2G, 3G, 4G and now 5G, the evolution of each generation brought about a massive increase in speed and transmission content; in short, 5G is the fifth generation communication technology, and is mainly characterized by millimeter-sized wavelength, ultra-wideband, ultra-high speed and ultra-low delay. 1G realizes analog voice communication, and a mobile phone has no screen and can only make a call; the 2G realizes the digitization of voice communication, and the functional machine has a small screen and can send a short message; 3G realizes multimedia communication of pictures except voice, and the like, and the screen is enlarged so that pictures can be seen; the 4G realizes local high-speed internet surfing, and the large-screen intelligent machine can see short videos, but has good urban signals and poor signals of old people. 1G-4G is a more convenient and quick communication between people, and 5G is used for realizing interconnection at any time and any place and everything, so that people are dared to expect to participate in the communication with everything on the earth in a time-difference-free synchronous manner in a live broadcast mode, the requirement on signals of the 5G is completely realized, the 5G is used as a carrier for carrying the 5G signals, the approach in the direction of zero loss of the signals is required to be realized as much as possible, hollow microbeads are used as filling media for preparing finished products, and the possibility of high speed and low loss of the signals is realized.
Patent CN112724515a discloses a beautifying radome base material and a preparation method thereof, which comprises the following components in parts by weight: 55-70 parts of polypropylene resin, 5-15 parts of modified hollow glass microspheres, 5-15 parts of modified glass fibers, 10-15 parts of toughening agent, 3-5 parts of compatilizer, 0.3-0.6 part of antioxidant, 0.3-0.6 part of lubricant and 0.1-0.3 part of ultraviolet resistant agent. According to the description of the paragraph 0071, the dielectric constant of the prepared beautifying radome material is 2.258, the dielectric loss is 0.00152, the notch impact strength is 18.42 MPa, the dielectric constant and the dielectric loss are still to be reduced, and the strength is still to be improved.
Disclosure of Invention
The invention provides a 5G communication housing containing nano inorganic mullite alumina hollow microbeads, which has good dielectric constant, dielectric loss and strength.
The invention solves the technical problems by adopting the following technical scheme:
the 5G communication housing containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 1-3 parts of an anti-aging agent, 1-3 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3-15 parts of linear phenol formaldehyde resin, 5-25 parts of bisphenol A phenolic epoxy resin, 10-20 parts of modified glass fiber, 10-30 parts of o-cresol formaldehyde epoxy resin, 10-35 parts of phosphorus-containing and nitrogen-containing phenolic epoxy resin, 15-35 parts of an auxiliary agent, 10-45 parts of phenol type phenolic epoxy resin and 15-80 parts of nano inorganic mullite alumina hollow microbeads.
As a preferable scheme, the 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 1-2 parts of an anti-aging agent, 1-2.5 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3-10 parts of linear phenol formaldehyde resin, 5-20 parts of bisphenol A phenolic epoxy resin, 10-18 parts of modified glass fiber, 10-20 parts of o-cresol formaldehyde epoxy resin, 10-30 parts of phosphorus-containing nitrogen-containing phenolic epoxy resin, 15-30 parts of an auxiliary agent, 10-40 parts of phenol type phenolic epoxy resin and 15-60 parts of nano inorganic mullite alumina hollow microbeads.
As a preferable scheme, the 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 1.5 parts of an anti-aging agent, 2 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 8 parts of linear phenol formaldehyde resin, 12 parts of bisphenol A phenolic epoxy resin, 15 parts of modified glass fibers, 15 parts of o-cresol formaldehyde epoxy resin, 20 parts of phosphorus-containing nitrogen-containing phenolic epoxy resin, 22 parts of an auxiliary agent, 25 parts of phenol type phenolic epoxy resin and 29.5 parts of nano inorganic mullite alumina hollow microbeads.
As a preferable scheme, the preparation method of the modified glass fiber comprises the following steps:
s1, adding 10-20 parts by weight of glass fiber, 4-10 parts by weight of hydrogen peroxide and 1-5 parts by weight of citric acid into 70-90 parts by weight of hydrochloric acid aqueous solution, and uniformly stirring at a rotating speed of 100-600 rpm to obtain glass fiber pretreatment liquid;
s2, adding 1-4 parts by weight of aminoethoxy aminopropyl trimethoxy silane and 1-4 parts by weight of heptadecafluoro decyl triethoxy silane into 20-40 parts by weight of deionized water to prepare a modified liquid;
s3, 1 part by weight of the modifying liquid is dripped into 3-6 parts by weight of the glass fiber pretreatment liquid, ultrasonic treatment is carried out at 60-80 ℃, stirring is carried out for 1-5 hours at the rotating speed of 300-800 rpm, filtering is carried out, and drying is carried out, thus obtaining the modified glass fiber.
As a preferable scheme, the hydrochloric acid aqueous solution in the S1 is a hydrochloric acid aqueous solution with a molar concentration of 1-5 mol/L.
As a preferable scheme, the ultrasonic treatment power is 200-600W, and the ultrasonic treatment time is 30-60 min.
As a preferable scheme, the preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 40-52 parts by weight of mullite, 20-35 parts by weight of aluminum oxide, 8-20 parts by weight of silicon dioxide, 1-4 parts by weight of magnesium oxide and 0.8-2 parts by weight of zinc oxide into a ball mill, and uniformly ball-milling at a rotating speed of 500-800 rpm to obtain mixed powder;
s2, adding 8-20 parts by weight of mixed powder into 30-50 parts by weight of deionized water, adding 0.5-1 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance;
s3, sintering the pelleting material at 850-1000 ℃ for 40-70 min, and then sintering the pelleting material at 1300-1600 ℃ for 30-60 min to obtain a precursor;
and S4, uniformly dispersing 10 parts by weight of precursor in 30-60 parts by weight of deionized water, adding 1-4 parts by weight of cyclodextrin and 0.5-1 part by weight of KH550, uniformly stirring at a rotating speed of 100-600 rpm, filtering, and drying to obtain the nano inorganic mullite alumina hollow microbeads.
As a preferable mode, the spray granulation specifically comprises: the inlet temperature of hot air is 85-95 ℃, the outlet temperature is 55-70 ℃, and the inlet air quantity is 120-150 m 3 And/h, the outlet air quantity is 150-200 m 3 And/h, the rotating speed is 12000-16000 r/min.
As a preferable scheme, the anti-aging agent is an anti-aging agent 4020.
As a preferable scheme, the auxiliary agent comprises a cross-linking agent, a lubricant, a light stabilizer and an antioxidant according to the weight ratio of 10-15: 1-4: 1-4: 1-3, wherein the cross-linking agent is styrene, the lubricant is zinc stearate, the antioxidant is antioxidant 1010, and the light stabilizer is light stabilizer UV326.
The invention has the beneficial effects that: the 5G communication housing containing the nano inorganic mullite alumina hollow microbeads has good dielectric constant, dielectric loss and strength; under the resin systems of the linear phenol formaldehyde resin, the bisphenol A phenolic epoxy resin, the o-cresol formaldehyde epoxy resin, the phosphorus-containing nitrogen-containing phenolic epoxy resin and the phenol type phenolic epoxy resin, the 5G communication housing with good dielectric constant, dielectric loss and strength is prepared by adding the nano inorganic mullite alumina hollow microbeads and the modified glass fibers.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the parts are parts by weight unless specifically stated otherwise.
Example 1
The 5G communication housing containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 1.5 parts of an anti-aging agent 4020, 2 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 8 parts of linear phenol formaldehyde resin (PF-8020-65M), 12 parts of bisphenol A novolac epoxy resin (EPIKOTE 5520-W-60A), 15 parts of modified glass fiber, 15 parts of o-cresol novolac epoxy resin (EOCN 6850), 20 parts of phosphorus-containing nitrogen-containing novolac epoxy resin (DOPOPNE-630), 22 parts of an auxiliary agent, 25 parts of phenol novolac epoxy resin (EPON SU-8) and 29.5 parts of nano inorganic mullite alumina hollow microbeads.
The auxiliary agent comprises a cross-linking agent, a lubricant, a light stabilizer and an antioxidant according to the weight ratio of 14:3:3:2, wherein the cross-linking agent is styrene, the lubricant is zinc stearate, the antioxidant is antioxidant 1010, and the light stabilizer is light stabilizer UV326.
The preparation method of the modified glass fiber comprises the following steps:
s1, adding 12 parts by weight of glass fiber, 6 parts by weight of hydrogen peroxide and 3 parts by weight of citric acid into 79 parts by weight of hydrochloric acid aqueous solution with the molar concentration of 4mol/L, and uniformly stirring at a rotating speed of 400rpm to obtain glass fiber pretreatment liquid;
s2, adding 3 parts by weight of aminoethoxy aminopropyl trimethoxysilane and 2 parts by weight of heptadecafluorodecyl triethoxysilane into 35 parts by weight of deionized water to prepare a modified liquid;
s3, 1 part by weight of the modifying liquid is dripped into 4 parts by weight of the glass fiber pretreatment liquid, the glass fiber pretreatment liquid is subjected to ultrasonic treatment at 70 ℃ for 50min at 500W, and then is stirred for 4h at 600rpm, filtered and dried, so that the modified glass fiber is obtained.
The preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 48 parts by weight of mullite, 32 parts by weight of alumina, 16 parts by weight of silicon dioxide, 3 parts by weight of magnesium oxide and 1 part by weight of zinc oxide into a ball mill, and uniformly ball-milling at 600rpm to obtain mixed powder;
s2, adding 15 parts by weight of mixed powder into 35 parts by weight of deionized water, adding 0.6 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance; the spray granulation specifically comprises the following steps: the inlet temperature of the hot air is 90 ℃, the outlet temperature is 65 ℃, and the inlet air quantity is 140m 3 /h, outlet air volume 180m 3 And/h, the rotating speed is 15000r/min;
s3, sintering the pelleting material at 950 ℃ for 50min, and then sintering the pelleting material at 1500 ℃ for 40min to obtain a precursor;
and S4, uniformly dispersing 10 parts by weight of precursor in 36.2 parts by weight of deionized water, adding 3 parts by weight of cyclodextrin and 0.8 part by weight of KH550, uniformly stirring at 500rpm, filtering, and drying to obtain the nano inorganic mullite alumina hollow microbeads.
The preparation method of the 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads comprises the following steps:
(1) Adding o-cresol formaldehyde epoxy resin, phenol type phenolic epoxy resin and bisphenol A phenolic epoxy resin into a reaction kettle, uniformly stirring at 200rpm, adding phosphorus-containing nitrogen-containing phenolic epoxy resin, linear phenol formaldehyde resin and resorcinol bis (2, 6-dimethylphenyl) phosphate, and uniformly stirring to obtain a first slurry;
(2) Uniformly mixing an anti-aging agent 4020, modified glass fibers, an auxiliary agent and nano inorganic mullite alumina hollow microbeads to obtain second slurry;
(3) Adding the second slurry into the reaction kettle in the step (1), and uniformly mixing to obtain glue;
(4) Adding glue into an impregnating tank of a gluing machine, immersing electronic-grade glass fiber insulating cloth into the impregnating tank 4 for seed separation, drying and cooling to obtain a prepreg, respectively adding a layer of polyethylene film with the thickness of 40 micrometers on the upper surface and the lower surface of the prepreg, adding a mirror surface stainless steel plate with the thickness of 1.5mm on one surface of the polyethylene film, placing into high-temperature pressing equipment, pressing and forming for 4 hours at the temperature of 200 ℃, and cooling to obtain the 5G communication housing containing the nano inorganic mullite alumina hollow microbeads.
Example 2
The 5G communication housing containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 1 part of an anti-aging agent 4020, 3 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3 parts of linear phenol formaldehyde resin (PF-8020-65M), 25 parts of bisphenol A novolac epoxy resin (EPIKOTE 5520-W-60A), 10 parts of modified glass fiber, 30 parts of o-cresol novolac epoxy resin (EOCN 6850), 10 parts of phosphorus-containing and nitrogen-containing novolac epoxy resin (DOPOPNE-630), 35 parts of an auxiliary agent, 10 parts of phenol novolac epoxy resin (EPON SU-8) and 30 parts of nano inorganic mullite alumina hollow microbeads.
The auxiliary agent comprises a cross-linking agent, a lubricant, a light stabilizer and an antioxidant according to the weight ratio of 14:3:3:2, wherein the cross-linking agent is styrene, the lubricant is zinc stearate, the antioxidant is antioxidant 1010, and the light stabilizer is light stabilizer UV326.
The preparation method of the modified glass fiber comprises the following steps:
s1, adding 15 parts by weight of glass fiber, 5 parts by weight of hydrogen peroxide and 1 part by weight of citric acid into 79 parts by weight of hydrochloric acid aqueous solution with the molar concentration of 3mol/L, and uniformly stirring at a rotating speed of 400rpm to obtain glass fiber pretreatment liquid;
s2, adding 4 parts by weight of aminoethoxy aminopropyl trimethoxysilane and 1 part by weight of heptadecafluorodecyl triethoxysilane into 35 parts by weight of deionized water to prepare a modified liquid;
s3, 1 part by weight of the modifying liquid is dripped into 4 parts by weight of the glass fiber pretreatment liquid, ultrasonic treatment is carried out for 50min at 70 ℃ by 300W, stirring is carried out for 2h by 500rpm, filtering is carried out, and drying is carried out, thus obtaining the modified glass fiber.
The preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 50 parts by weight of mullite, 35 parts by weight of alumina, 12 parts by weight of silicon dioxide, 2 parts by weight of magnesium oxide and 1 part by weight of zinc oxide into a ball mill, and uniformly ball-milling at 600rpm to obtain mixed powder;
s2, adding 15 parts by weight of mixed powder into 35 parts by weight of deionized water, adding 1 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance; the spray granulation specifically comprises the following steps: the inlet temperature of the hot air is 90 ℃, the outlet temperature is 65 ℃, and the inlet air quantity is 140m 3 /h, outlet air volume 180m 3 And/h, the rotating speed is 15000r/min;
s3, sintering the pelleting material at 950 ℃ for 50min, and then sintering the pelleting material at 1500 ℃ for 40min to obtain a precursor;
and S4, uniformly dispersing 10 parts by weight of precursor in 36.2 parts by weight of deionized water, adding 3 parts by weight of cyclodextrin and 0.8 part by weight of KH550, uniformly stirring at 500rpm, filtering, and drying to obtain the nano inorganic mullite alumina hollow microbeads.
The preparation method of the 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads comprises the following steps:
(1) Adding o-cresol formaldehyde epoxy resin, phenol type phenolic epoxy resin and bisphenol A phenolic epoxy resin into a reaction kettle, uniformly stirring at 200rpm, adding phosphorus-containing nitrogen-containing phenolic epoxy resin, linear phenol formaldehyde resin and resorcinol bis (2, 6-dimethylphenyl) phosphate, and uniformly stirring to obtain a first slurry;
(2) Uniformly mixing an anti-aging agent 4020, modified glass fibers, an auxiliary agent and nano inorganic mullite alumina hollow microbeads to obtain second slurry;
(3) Adding the second slurry into the reaction kettle in the step (1), and uniformly mixing to obtain glue;
(4) Adding glue into an impregnating tank of a gluing machine, immersing electronic-grade glass fiber insulating cloth into the impregnating tank 4 for seed separation, drying and cooling to obtain a prepreg, respectively adding a layer of polyethylene film with the thickness of 40 micrometers on the upper surface and the lower surface of the prepreg, adding a mirror surface stainless steel plate with the thickness of 1.5mm on one surface of the polyethylene film, placing into high-temperature pressing equipment, pressing and forming for 4 hours at the temperature of 200 ℃, and cooling to obtain the 5G communication housing containing the nano inorganic mullite alumina hollow microbeads.
Example 3
The 5G communication housing containing the nano inorganic mullite alumina hollow microbeads is prepared from the following raw materials in parts by weight: 3 parts of an anti-aging agent 4020, 1 part of resorcinol bis (2, 6-dimethylphenyl) phosphate, 15 parts of linear phenol formaldehyde resin (PF-8020-65M), 5 parts of bisphenol A novolac epoxy resin (EPIKOTE 5520-W-60A), 14 parts of modified glass fiber, 10 parts of o-cresol novolac epoxy resin (EOCN 6850), 35 parts of phosphorus-containing and nitrogen-containing novolac epoxy resin (DOPOPNE-630), 15 parts of an auxiliary agent, 45 parts of phenol novolac epoxy resin (EPON SU-8) and 15 parts of nano inorganic mullite alumina hollow microbeads.
The auxiliary agent comprises a cross-linking agent, a lubricant, a light stabilizer and an antioxidant according to the weight ratio of 14:3:3:2, wherein the cross-linking agent is styrene, the lubricant is zinc stearate, the antioxidant is antioxidant 1010, and the light stabilizer is light stabilizer UV326.
The preparation method of the modified glass fiber comprises the following steps:
s1, adding 20 parts by weight of glass fibers, 10 parts by weight of hydrogen peroxide and 1 part by weight of citric acid into 90 parts by weight of hydrochloric acid aqueous solution with the molar concentration of 1mol/L, and uniformly stirring at a rotating speed of 300rpm to obtain glass fiber pretreatment liquid;
s2, adding 2 parts by weight of aminoethoxy aminopropyl trimethoxysilane and 4 parts by weight of heptadecafluorodecyl triethoxysilane into 34 parts by weight of deionized water to prepare a modified liquid;
s3, 1 part by weight of the modifying liquid is dripped into 3 parts by weight of the glass fiber pretreatment liquid, the glass fiber pretreatment liquid is subjected to ultrasonic treatment at 65 ℃ for 50min at 500W, and then is stirred for 4h at 600rpm, filtered and dried, so that the modified glass fiber is obtained.
The preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 40 parts by weight of mullite, 20 parts by weight of alumina, 20 parts by weight of silicon dioxide, 1 part by weight of magnesium oxide and 2 parts by weight of zinc oxide into a ball mill, and uniformly ball-milling at 600rpm to obtain mixed powder;
s2, adding 15 parts by weight of mixed powder into 35 parts by weight of deionized water, adding 1 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance; the spray granulation specifically comprises the following steps: the inlet temperature of the hot air is 90 ℃, the outlet temperature is 65 ℃, and the inlet air quantity is 140m 3 /h, outlet air volume 180m 3 And/h, the rotating speed is 15000r/min;
s3, sintering the pelleting material at 950 ℃ for 50min, and then sintering the pelleting material at 1500 ℃ for 40min to obtain a precursor;
and S4, uniformly dispersing 10 parts by weight of precursor in 36.2 parts by weight of deionized water, adding 3 parts by weight of cyclodextrin and 0.8 part by weight of KH550, uniformly stirring at 500rpm, filtering, and drying to obtain the nano inorganic mullite alumina hollow microbeads.
The preparation method of the 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads comprises the following steps:
(1) Adding o-cresol formaldehyde epoxy resin, phenol type phenolic epoxy resin and bisphenol A phenolic epoxy resin into a reaction kettle, uniformly stirring at 200rpm, adding phosphorus-containing nitrogen-containing phenolic epoxy resin, linear phenol formaldehyde resin and resorcinol bis (2, 6-dimethylphenyl) phosphate, and uniformly stirring to obtain a first slurry;
(2) Uniformly mixing an anti-aging agent 4020, modified glass fibers, an auxiliary agent and nano inorganic mullite alumina hollow microbeads to obtain second slurry;
(3) Adding the second slurry into the reaction kettle in the step (1), and uniformly mixing to obtain glue;
(4) Adding glue into an impregnating tank of a gluing machine, immersing electronic-grade glass fiber insulating cloth into the impregnating tank 4 for seed separation, drying and cooling to obtain a prepreg, respectively adding a layer of polyethylene film with the thickness of 40 micrometers on the upper surface and the lower surface of the prepreg, adding a mirror surface stainless steel plate with the thickness of 1.5mm on one surface of the polyethylene film, placing into high-temperature pressing equipment, pressing and forming for 4 hours at the temperature of 200 ℃, and cooling to obtain the 5G communication housing containing the nano inorganic mullite alumina hollow microbeads.
Comparative example 1
Comparative example 1 differs from example 1 in that comparative example 1 uses an equivalent amount of hollow glass microspheres instead of the nano inorganic mullite alumina hollow microspheres, all the other things being equal.
Comparative example 2
Comparative example 2 is different from example 1 in that the preparation method of the nano inorganic mullite alumina hollow microbeads described in comparative example 2 is different from example 1, and the other are the same.
Granulating and sintering in the comparative example to obtain the nano inorganic mullite alumina hollow microbeads.
The preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 48 parts by weight of mullite, 32 parts by weight of alumina, 16 parts by weight of silicon dioxide, 3 parts by weight of magnesium oxide and 1 part by weight of zinc oxide into a ball mill, and uniformly ball-milling at 600rpm to obtain mixed powder;
s2, adding 15 parts by weight of mixed powder into 35 parts by weight of deionized water, adding 0.6 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance; the spray granulation specifically comprises the following steps: the inlet temperature of the hot air is 90 ℃, the outlet temperature is 65 ℃, and the inlet air quantity is 140m 3 /h, outlet air volume 180m 3 /h, rotational speed of 15000r/min；
S3, sintering the pelleting matter at 950 ℃ for 50min, and then sintering at 1500 ℃ for 40min to obtain the nano inorganic mullite alumina hollow microbeads.
Comparative example 3
Comparative example 3 differs from example 1 in that comparative example 3 does not contain the modified glass fiber described, all other things being equal.
Comparative example 4
Comparative example 4 differs from example 1 in that comparative example 4 uses glass fibers instead of modified glass fibers, all of which are identical.
Comparative example 5
Comparative example 5 is different from example 1 in that the modified glass fiber described in comparative example 5 is produced by a method different from example 1, and the other are the same.
In the comparative example, the modified glass fiber is only pretreated and is not treated by the modifying liquid.
The preparation method of the modified glass fiber comprises the following steps:
s1, adding 12 parts by weight of glass fiber, 6 parts by weight of hydrogen peroxide and 3 parts by weight of citric acid into 79 parts by weight of hydrochloric acid aqueous solution with the molar concentration of 4mol/L, uniformly stirring at 400rpm, filtering and drying to obtain the modified glass fiber.
Table 1 results of Performance test of the outer covers described in examples 1 to 3 and comparative examples 1 to 5
As can be seen from table 1, the outer cover prepared by the present invention has good dielectric constant, dielectric loss and strength.
As can be seen from comparative examples 1 and 1-2, the nano inorganic mullite alumina hollow microbeads provided by the invention can remarkably improve dielectric constant, dielectric loss and strength. In the preparation method of the nano inorganic mullite alumina hollow microbeads, cyclodextrin and KH550 are adopted for treatment after sintering, so that the dielectric constant, dielectric loss and strength can be remarkably improved.
As can be seen from comparative examples 1 and 3-5, the modified glass fibers described herein can significantly improve dielectric constant, dielectric loss and strength.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of the claims.

Claims (8)

1. The 5G communication outer cover containing the nano inorganic mullite alumina hollow microbeads is characterized by being prepared from the following raw materials in parts by weight: 1-3 parts of an anti-aging agent, 1-3 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3-15 parts of linear phenol formaldehyde resin, 5-25 parts of bisphenol A phenolic epoxy resin, 10-20 parts of modified glass fiber, 10-30 parts of o-cresol formaldehyde epoxy resin, 10-35 parts of phosphorus-containing and nitrogen-containing phenolic epoxy resin, 15-35 parts of an auxiliary agent, 10-45 parts of phenol type phenolic epoxy resin and 15-80 parts of nano inorganic mullite alumina hollow microbeads;
the preparation method of the modified glass fiber comprises the following steps:
s1, adding 10-20 parts by weight of glass fiber, 4-10 parts by weight of hydrogen peroxide and 1-5 parts by weight of citric acid into 70-90 parts by weight of hydrochloric acid aqueous solution, and uniformly stirring at a rotating speed of 100-600 rpm to obtain glass fiber pretreatment liquid;
s2, adding 1-4 parts by weight of aminoethoxy aminopropyl trimethoxy silane and 1-4 parts by weight of heptadecafluoro decyl triethoxy silane into 20-40 parts by weight of deionized water to prepare a modified liquid;
s3, 1 part by weight of the modifying liquid is dripped into 3-6 parts by weight of the glass fiber pretreatment liquid, ultrasonic treatment is carried out at 60-80 ℃, stirring is carried out for 1-5 hours at the rotating speed of 300-800 rpm, filtering is carried out, and drying is carried out, thus obtaining modified glass fibers;
the preparation method of the nano inorganic mullite alumina hollow microbeads comprises the following steps:
s11, adding 40-52 parts by weight of mullite, 20-35 parts by weight of aluminum oxide, 8-20 parts by weight of silicon dioxide, 1-4 parts by weight of magnesium oxide and 0.8-2 parts by weight of zinc oxide into a ball mill, and uniformly ball-milling at a rotating speed of 500-800 rpm to obtain mixed powder;
s2, adding 8-20 parts by weight of mixed powder into 30-50 parts by weight of deionized water, adding 0.5-1 part by weight of sodium dodecyl benzene sulfonate, uniformly stirring to obtain slurry, and pumping the slurry into a centrifugal spray dryer for spray granulation to obtain a granulating substance;
s3, sintering the pelleting material at 850-1000 ℃ for 40-70 min, and then sintering the pelleting material at 1300-1600 ℃ for 30-60 min to obtain a precursor;
and S4, uniformly dispersing 10 parts by weight of precursor in 30-60 parts by weight of deionized water, adding 1-4 parts by weight of cyclodextrin and 0.5-1 part by weight of KH550, uniformly stirring at a rotating speed of 100-600 rpm, filtering, and drying to obtain the nano inorganic mullite alumina hollow microbeads.
2. The housing for 5G communication containing nano inorganic mullite alumina hollow microbeads according to claim 1, which is characterized by being prepared from the following raw materials in parts by weight: 1-2 parts of an anti-aging agent, 1-2.5 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 3-10 parts of linear phenol formaldehyde resin, 5-20 parts of bisphenol A phenolic epoxy resin, 10-18 parts of modified glass fiber, 10-20 parts of o-cresol formaldehyde epoxy resin, 10-30 parts of phosphorus-containing nitrogen-containing phenolic epoxy resin, 15-30 parts of an auxiliary agent, 10-40 parts of phenol type phenolic epoxy resin and 15-60 parts of nano inorganic mullite alumina hollow microbeads.
3. The housing for 5G communication containing nano inorganic mullite alumina hollow microbeads according to claim 1, which is characterized by being prepared from the following raw materials in parts by weight: 1.5 parts of an anti-aging agent, 2 parts of resorcinol bis (2, 6-dimethylphenyl) phosphate, 8 parts of linear phenol formaldehyde resin, 12 parts of bisphenol A phenolic epoxy resin, 15 parts of modified glass fibers, 15 parts of o-cresol formaldehyde epoxy resin, 20 parts of phosphorus-containing nitrogen-containing phenolic epoxy resin, 22 parts of an auxiliary agent, 25 parts of phenol type phenolic epoxy resin and 29.5 parts of nano inorganic mullite alumina hollow microbeads.
4. The housing for 5G communication containing nano-inorganic mullite alumina hollow microbeads according to claim 1, wherein the hydrochloric acid aqueous solution in S1 is 1-5 mol/L hydrochloric acid aqueous solution.
5. The housing for 5G communication containing nano-inorganic mullite alumina hollow microbeads according to claim 1, wherein the ultrasonic treatment power is 200-600 w and the ultrasonic treatment time is 30-60 min.
6. The housing for 5G communication containing nano-inorganic mullite alumina hollow microbeads of claim 1, wherein the spray granulation specifically comprises: the inlet temperature of the hot air is 85-95 ℃, the outlet temperature is 55-70 ℃, the inlet air quantity is 120-150 m < 3 >/h, the outlet air quantity is 150-200 m < 3 >/h, and the rotating speed is 12000-16000 r/min.
7. The cover for 5G communication containing nano-inorganic mullite alumina hollow microbeads of claim 1, wherein the anti-aging agent is anti-aging agent 4020.
8. The 5G communication housing containing nano inorganic mullite alumina hollow microbeads, according to claim 1, is characterized in that the auxiliary agent comprises a cross-linking agent, a lubricant, a light stabilizer and an antioxidant according to the weight ratio of 10-15: 1-4: 1-4: 1-3, wherein the cross-linking agent is styrene, the lubricant is zinc stearate, the antioxidant is antioxidant 1010, and the light stabilizer is light stabilizer UV326.
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