CN115974533B - High-strength 5G signal base station ceramic cover plate - Google Patents
High-strength 5G signal base station ceramic cover plate Download PDFInfo
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- CN115974533B CN115974533B CN202211539558.8A CN202211539558A CN115974533B CN 115974533 B CN115974533 B CN 115974533B CN 202211539558 A CN202211539558 A CN 202211539558A CN 115974533 B CN115974533 B CN 115974533B
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- 239000000919 ceramic Substances 0.000 title claims abstract description 31
- 229910000505 Al2TiO5 Inorganic materials 0.000 claims abstract description 26
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 claims abstract description 26
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 25
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 30
- 238000000498 ball milling Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 19
- 238000005245 sintering Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 12
- 238000001272 pressureless sintering Methods 0.000 claims description 11
- 239000012300 argon atmosphere Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 7
- 238000000462 isostatic pressing Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000000465 moulding Methods 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 abstract description 5
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 2
- 229910001428 transition metal ion Inorganic materials 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 229910010413 TiO 2 Inorganic materials 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to the field of ceramic materials, in particular to a high-strength 5G signal base station ceramic cover plate, which is prepared from the following raw materials of alpha-Al 2 O 3 、Ca x A 1‑x Ti y B 1‑y O 3 And aluminum titanate; the preparation raw materials comprise alpha-Al 2 O 3 、Ca x A 1‑x Ti y B 1‑y O 3 And aluminum titanate; a is alkaline earth ion or rare earth ion; b is a transition metal ion; x is 0.99-0.995; the y is 0.5-0.9, and the ceramic cover plate prepared by the invention has excellent mechanical property, low dielectric constant and low dielectric loss, and basically does not influence the signal transmission of the 5G millimeter wave high-frequency band.
Description
Technical Field
The invention relates to the field of ceramic materials, in particular to a high-strength 5G signal base station ceramic cover plate.
Background
Along with the great breakthrough of science and technology, the Internet of things industry is rapidly developed, and the mobile communication network is also developed from 2G and 3G to 4G, so that the life of people is changed step by step. Nowadays, 5G signal base stations are becoming popular, and the era of everything interconnection is coming, which means that intelligent products based on 5G communication networks have become the main stream of the market.
Because the 5G has a millimeter wave high-frequency band, signal transmission is easy to be interfered, the dielectric constant and dielectric loss of the propagation medium material are required to be small, the ceramic cover plate plays a role in protecting components of the 5G signal base station, the ceramic cover plate is required to have higher mechanical strength, and the influence on the signal transmission of the high-frequency 5G millimeter wave band is small.
Disclosure of Invention
The invention aims to: aiming at the technical problems, the invention provides a high-strength 5G signal base station ceramic cover plate.
The technical scheme adopted is as follows:
a high-strength 5G signal base station ceramic cover plate is prepared from alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate;
the preparation raw materials comprise alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate;
a is alkaline earth ion or rare earth ion;
b is a transition metal ion;
x is 0.99-0.995;
y is 0.5-0.9.
Further, A is Ba or Sr.
Further, B is Zr.
Further, x is 0.992.
Further, y is 0.5.
Further, the alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate at a mass ratio of 100:0.5-1.5:5-10.
Further, the alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate at a mass ratio of 100:0.5:8.
the invention also provides a preparation method of the high-strength 5G signal base station ceramic cover plate, which comprises the following steps:
alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 Mixing with aluminum titanate, ball milling, drying, heating to 800-1000 ℃, presintering for 1-3h, ball milling again, drying, adding binder, granulating, transferring the obtained granules into a mould, isostatic pressing to obtain a rough blank, heating to 1450-1550 ℃ for pressureless sintering for 1-2h, heating to 1620-1650 ℃ for pressurized sintering for 1-2h in argon atmosphere, and cooling to room temperature along with a furnace.
Further, the rough blank forming pressure is 20-30MPa.
Further, the first stage heating rate is 10-20 ℃/min, and the second stage heating rate is 3-5 ℃/min.
Further, the pressure sintering pressure is 2-4MPa.
The invention has the beneficial effects that:
CaTiO 3 is beneficial to the addition of alpha-Al 2 O 3 To promote densification of ceramic, and to CaTiO 3 Doping A and B to form a composite perovskite structure, generating defects in the system, further promoting sintering, wherein dielectric loss is influenced by metal vacancies and oxygen vacancies, and Ca is generated by adjusting doping elements x A 1-x Ti y B 1-y O 3 The dielectric loss of the ceramic material can be effectively reduced by adding the aluminum titanate, the aluminum titanate can be decomposed into TiO during presintering 2 On the one hand can be with Al 2 O 3 Form solid solution, fill alpha-Al 2 O 3 Inter-particle voids, on the other hand Ti 4+ Can replace Al in hetero-phase 3+ The ceramic cover plate prepared by the invention has excellent mechanical property, low dielectric constant and low dielectric loss, and basically does not influence the signal transmission of a 5G millimeter wave high-frequency band.
Drawings
FIG. 1 is an SEM image of a ceramic cover plate prepared according to example 1 of the invention.
Detailed Description
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention. The technology not mentioned in the present invention refers to the prior art.
Example 1:
the high-strength 5G signal base station ceramic cover plate is prepared from the following raw materials in percentage by mass: 0.5:8 alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 And aluminum titanate;
the preparation method of the high-strength 5G signal base station ceramic cover plate comprises the following steps:
according to structural formula Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 CaCO is weighed according to the proportion 3 、SrCO 3 、ZrO 2 And TiO 2 Ball milling for 5h to uniformly mix, pre-sintering for 4h at 900 ℃, ball milling for 5h again, drying and transferring into a high-temperature tube furnace, heating to 1400 ℃ in oxygen atmosphere, firing for 4h, cooling to room temperature along with the furnace, and obtaining the alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 Mixing with aluminum titanate, ball milling for 5 hours, drying, heating to 950 ℃ for presintering for 2 hours, ball milling for 2 hours again, drying, adding a polyvinyl alcohol solution with the mass concentration of 8% as a binder for granulating, transferring the obtained granules into a mould, carrying out isostatic pressing under the pressure of 25MPa to obtain a rough blank, heating the rough blank to 1530 ℃ for pressureless sintering for 1.5 hours at the speed of 12 ℃/min, heating to 1650 ℃ for pressureless sintering for 2 hours at the speed of 5 ℃/min under argon atmosphere, and finally cooling to room temperature along with a furnace.
Example 2:
the high-strength 5G signal base station ceramic cover plate is prepared from the following raw materials in percentage by mass: 0.5:8 alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 And aluminum titanate;
the preparation method of the high-strength 5G signal base station ceramic cover plate comprises the following steps:
according to structural formula Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 CaCO is weighed according to the proportion 3 、SrCO 3 、ZrO 2 And TiO 2 Ball milling for 5h to uniformly mix, pre-sintering for 4h at 900 ℃, ball milling for 5h again, drying and transferring into a high-temperature tube furnace, heating to 1400 ℃ in oxygen atmosphere, firing for 4h, cooling to room temperature along with the furnace, and obtaining the alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 Mixing with aluminum titanate, ball milling for 5 hours, drying, heating to 1000 ℃ for presintering for 3 hours, ball milling for 2 hours again, drying, adding a polyvinyl alcohol solution with the mass concentration of 8% as a binder for granulating, transferring the obtained granules into a mould, carrying out isostatic pressing under the pressure of 30MPa to obtain a rough blank, heating the rough blank to 1550 ℃ for pressureless sintering for 2 hours at the speed of 20 ℃/min, heating to 1650 ℃ for pressureless sintering for 2 hours at the speed of 5 ℃/min under argon atmosphere, pressurizing and sintering at the pressure of 4MPa, and finally cooling to room temperature along with a furnace.
Example 3:
the high-strength 5G signal base station ceramic cover plate is prepared from the following raw materials in percentage by mass: 0.5:8 alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 And aluminum titanate;
the preparation method of the high-strength 5G signal base station ceramic cover plate comprises the following steps:
according to structural formula Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 CaCO is weighed according to the proportion 3 、SrCO 3 、ZrO 2 And TiO 2 Ball milling for 5h to uniformly mix, pre-sintering for 4h at 900 ℃, ball milling for 5h again, drying and transferring into a high-temperature tube furnace, heating to 1400 ℃ in oxygen atmosphere, firing for 4h, cooling to room temperature along with the furnace, and obtaining the alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 Mixing with aluminum titanate, ball milling for 5 hours, drying, heating to 800 ℃ for presintering for 1 hour, ball milling for 2 hours again, drying, adding a polyvinyl alcohol solution with the mass concentration of 8% as a binder for granulating, transferring the obtained granules into a mould, carrying out isostatic pressing under the pressure of 30MPa to obtain a rough blank, heating the rough blank to 1450 ℃ for pressureless sintering for 1 hour at the speed of 10 ℃/min, heating to 1620 ℃ for pressureless sintering for 1 hour at the speed of 3 ℃/min in argon atmosphere, pressurizing and sintering at the pressure of 2MPa, and finally cooling to room temperature along with a furnace.
Example 4:
the high-strength 5G signal base station ceramic cover plate is prepared from the following raw materials in percentage by mass: 0.5:8 alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 And aluminum titanate;
the preparation method of the high-strength 5G signal base station ceramic cover plate comprises the following steps:
according to structural formula Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 CaCO is weighed according to the proportion 3 、SrCO 3 、ZrO 2 And TiO 2 Ball milling for 5h to uniformly mix, pre-sintering for 4h at 900 ℃, ball milling for 5h again, drying and transferring into a high-temperature tube furnace, heating to 1400 ℃ in oxygen atmosphere, firing for 4h, cooling to room temperature along with the furnace, and obtaining the alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 Mixing with aluminum titanate, ball milling for 5 hours, drying, heating to 1000 ℃ for presintering for 1 hour, ball milling for 2 hours again, drying, adding a polyvinyl alcohol solution with the mass concentration of 8% as a binder for granulating, transferring the obtained granules into a mould, carrying out isostatic pressing under the pressure of 30MPa to obtain a rough blank, heating the rough blank to 1550 ℃ for pressureless sintering for 1 hour at the speed of 10 ℃/min, heating to 1620 ℃ for pressurized sintering for 2 hours at the speed of 5 ℃/min under argon atmosphere, pressurizing and sintering at the pressure of 2MPa, and finally cooling to room temperature along with a furnace.
Example 5:
the high-strength 5G signal base station ceramic cover plate is prepared from the following raw materials in percentage by mass: 0.5:8 alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 And aluminum titanate;
the preparation method of the high-strength 5G signal base station ceramic cover plate comprises the following steps:
according to structural formula Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 CaCO is weighed according to the proportion 3 、SrCO 3 、ZrO 2 And TiO 2 Ball milling for 5h to uniformly mix, pre-sintering for 4h at 900 ℃, ball milling for 5h again, drying and transferring into a high-temperature tube furnace, heating to 1400 ℃ in oxygen atmosphere, firing for 4h, cooling to room temperature along with the furnace, and obtaining the alpha-Al 2 O 3 、Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 Mixing with aluminum titanate, ball milling for 5 hours, drying, heating to 800 ℃ for presintering for 3 hours, ball milling for 2 hours again, drying, adding a polyvinyl alcohol solution with the mass concentration of 8% as a binder for granulating, transferring the obtained granules into a mould, carrying out isostatic pressing under the pressure of 30MPa to obtain a rough blank, heating the rough blank to 1450 ℃ for pressureless sintering for 2 hours at the speed of 20 ℃/min, heating to 1650 ℃ for pressureless sintering for 1 hour at the speed of 3 ℃/min under argon atmosphere, pressurizing and sintering at the pressure of 4MPa, and finally cooling to room temperature along with a furnace.
Comparative example 1:
substantially the same as in example 1, except that Ca was not added 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 。
Comparative example 2:
substantially the same as in example 1, except that CaTiO was used 3 Instead of Ca 0.992 Sr 0.008 Ti 0.5 Zr 0.5 O 3 。
Comparative example 3:
substantially the same as in example 1, except that aluminum titanate was not added.
Comparative example 4:
substantially the same as in example 1, except that TiO was used 2 Instead of aluminum titanate.
Performance test:
the ceramic cover plates prepared in examples 1 to 5 and comparative examples 1 to 4 of the present invention were used as test pieces;
dielectric property test: the test frequency is 1MHz, and the dielectric constant and dielectric loss test instrument is an HF2810B type LCR digital bridge and 4194AIMPENDANCE/GAIN-PHASE ANALYSER;
three-point flexural strength test: the testing instrument is a universal material testing machine of SHIMADZU company.
The test results are shown in table 1 below:
table 1:
as shown in the table 1, the ceramic cover plate prepared by the invention has excellent mechanical properties, low dielectric constant and low dielectric loss, and basically does not influence the signal transmission of the 5G millimeter wave high-frequency band.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A high-strength 5G signal base station ceramic cover plate is characterized in that the preparation raw materials comprise alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1- y O 3 And aluminum titanate;
the preparation raw materials comprise alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate;
a is Ba or Sr;
b is Zr;
x is 0.992;
y is 0.5;
the alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 And aluminum titanate at a mass ratio of 100:0.5-1.5:5-10.
2. The high strength 5G signal base station ceramic cover of claim 1, wherein the α -Al 2 O 3 、Ca x A 1- x Ti y B 1-y O 3 And aluminum titanate at a mass ratio of 100:0.5:8.
3. a high strength 5G signal base station ceramic cover as claimed in claim 1 or 2A process for producing a plate, characterized by reacting alpha-Al 2 O 3 、Ca x A 1-x Ti y B 1-y O 3 Mixing with aluminum titanate, ball milling, drying, heating to 800-1000 ℃, presintering for 1-3h, ball milling again, drying, adding binder, granulating, transferring the obtained granules into a mould, isostatic pressing to obtain a rough blank, heating to 1450-1550 ℃ for pressureless sintering for 1-2h, heating to 1620-1650 ℃ for pressurized sintering for 1-2h in argon atmosphere, and cooling to room temperature along with a furnace.
4. The method for manufacturing a high-strength 5G signal base station ceramic cover plate according to claim 3, wherein the rough blank molding pressure is 20 to 30MPa.
5. The method for preparing the high-strength 5G signal base station ceramic cover plate according to claim 3, wherein the first-stage heating rate is 10-20 ℃/min, and the second-stage heating rate is 3-5 ℃/min.
6. The method for manufacturing a high-strength 5G signal base station ceramic cover plate according to claim 3, wherein the pressure sintering pressure is 2 to 4MPa.
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| CN202211539558.8A CN115974533B (en) | 2022-12-02 | 2022-12-02 | High-strength 5G signal base station ceramic cover plate |
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| CN115974533B true CN115974533B (en) | 2023-12-08 |
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| CN1653015A (en) * | 2002-05-15 | 2005-08-10 | 马科尼通讯股份有限公司 | Alumina ceramic and method for its manufacture |
| CN103833350A (en) * | 2012-11-20 | 2014-06-04 | 沈新荣 | Materials and method used for preparing calcium aluminum titanate electronic functional ceramic using laser |
| CN108675812A (en) * | 2018-06-21 | 2018-10-19 | 河北工业大学 | A kind of reinforced alumina ceramic mobile phone backboard and preparation method thereof |
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2022
- 2022-12-02 CN CN202211539558.8A patent/CN115974533B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653015A (en) * | 2002-05-15 | 2005-08-10 | 马科尼通讯股份有限公司 | Alumina ceramic and method for its manufacture |
| CN103833350A (en) * | 2012-11-20 | 2014-06-04 | 沈新荣 | Materials and method used for preparing calcium aluminum titanate electronic functional ceramic using laser |
| CN108675812A (en) * | 2018-06-21 | 2018-10-19 | 河北工业大学 | A kind of reinforced alumina ceramic mobile phone backboard and preparation method thereof |
Non-Patent Citations (3)
| Title |
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| L. S. Oliveira et al..STUDY OF THE PERFORMANCE OF DIELECTRIC RESONATOR ANTENNAS BASED ON THE MATRIX COMPOSITE OF Al2O3-CaTiO3.MICROWAVE AND OPTICAL TECHNOLOGY LETTERS.2015,第57卷(第4期),摘要. * |
| Qingyang Pang et al..Microstructure and crystal structure dependence of microwave dielectric properties of non-stoichiometric (Sr0.7Ca0.3)z(Zr0.95Ti0.05)O3 perovskite ceramics.Ceramics International.2022,第49卷摘要. * |
| 李明忠 等.钛酸铝与氧化铝复合材料的制备及其性能研究.武汉理工大学学报.2003,第25卷(第1期),第1页第1段. * |
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