CN111499376A - Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof - Google Patents

Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof Download PDF

Info

Publication number
CN111499376A
CN111499376A CN202010379801.9A CN202010379801A CN111499376A CN 111499376 A CN111499376 A CN 111499376A CN 202010379801 A CN202010379801 A CN 202010379801A CN 111499376 A CN111499376 A CN 111499376A
Authority
CN
China
Prior art keywords
powder
modifier
dielectric
ceramic powder
dielectric ceramic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010379801.9A
Other languages
Chinese (zh)
Inventor
晏育权
刘贤香
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Xinhengrui Electronic Technology Co ltd
Original Assignee
Shenzhen Xinhengrui Electronic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Xinhengrui Electronic Technology Co ltd filed Critical Shenzhen Xinhengrui Electronic Technology Co ltd
Priority to CN202010379801.9A priority Critical patent/CN111499376A/en
Publication of CN111499376A publication Critical patent/CN111499376A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
    • C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/83—Macromolecular compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/007—Manufacturing frequency-selective devices
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/442—Carbonates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention relates to the technical field of high-dielectric ceramics, in particular to ceramic powder for a 5G communication high-dielectric ceramic filter and a preparation method thereof, wherein the ceramic powder for the 5G communication high-dielectric ceramic filter comprises the following raw material components of BaTiO3(barium titanate): 96% -98.5%, modifier: 1.5% -4%; the raw material components in the modifier are as follows, SrCO3(strontium carbonate): 1% -3% of Y2O3(yttrium oxide): 0.5 to 1 percent; the method comprises the following steps: A. proportioning powder; B. grinding with water; C. granulating; D. dry pressing and forming; E. sintering; F. and (6) surface treatment. The invention is in solid phase reactionOn the basis of the method, the microwave dielectric ceramic powder with high dielectric constant (r) and low dielectric loss (Q × F value) is prepared by a series of processing of powder proportioning, water milling, granulation, dry pressing molding, sintering and surface treatment, so that the resonance filter has the characteristics of high inhibition, small insertion loss and good temperature drift characteristic, and the power capacity and the passive intermodulation are improved.

Description

Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof
Technical Field
The invention relates to the technical field of high-dielectric ceramics, in particular to ceramic powder for a 5G communication high-dielectric ceramic filter and a preparation method thereof.
Background
The traditional filter is generally realized by a metal coaxial cavity, and the electromagnetic waves with different frequencies oscillate in the coaxial cavity filter, so that the electromagnetic waves with the resonant frequency of the filter are reserved, and the electromagnetic waves with other frequencies are dissipated in the oscillation. In the 3G/4G era, the metal coaxial cavity has lower cost, and a mature process becomes the mainstream choice of the market.
In order to cope with the situation that the interference of the wireless environment is increasingly complicated, the ceramic dielectric resonant filter is rapidly developed. With the development of mobile communication networks, commercial wireless frequency bands become very dense, so that the common metal cavity filter cannot realize high-inhibition system compatibility, and the cavity filter made of ceramic dielectric materials can solve the problems.
The ceramic dielectric resonator filter uses an artificially synthesized ceramic dielectric material having a higher Q value (quality factor) than that of a conventional metal cavity filter, and in the ceramic dielectric resonator filter, electromagnetic waves mainly oscillate in a resonator made of a dielectric material, not in a metal cavity.
Disclosure of Invention
The invention aims to provide ceramic powder for a 5G communication high-dielectric ceramic filter and a preparation method thereof, which have the advantages of high suppression, small insertion loss, good temperature drift characteristic, and improved power capacity and passive intermodulation and are used for solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the ceramic powder for the 5G communication high-dielectric ceramic filter and the preparation method thereof, the ceramic powder for the 5G communication high-dielectric ceramic filter comprises the following raw material components,
BaTiO3(barium titanate): 96% -98.5%, modifier: 1.5% -4%;
the raw material components in the modifier are as follows,
SrCO3(strontium carbonate): 1% -3% of Y2O3(yttrium oxide): 0.5 to 1 percent.
Preferably, the BaTiO3、SrCO3AndY2O3the purity of the compounds is more than or equal to 99.5 percent.
The ceramic powder for the 5G communication high-dielectric ceramic filter and the preparation method thereof comprise the following steps:
A. powder proportioning: weighing a certain amount of BaTiO according to the weight percentage3A modifier;
B. water milling: mixing BaTiO3Putting the modifier into a lattice type wet ball mill, and performing ball milling for 10-15 h, wherein the granularity of the ball-milled material is controlled to be 200 meshes and accounts for more than 95%;
C. and (3) granulation: feeding the ball-milled materials into a granulator for granulation to prepare powdery materials;
D. dry pressing and forming: filling the powdery material into a die, and applying a pressure of 12-15 MPa to prepare a compact blank;
E. ① sintering, namely, putting the dense blank into a medium-temperature kiln, biscuiting at 900-950 ℃ to obtain a primary product, removing adsorption powder from the primary product ②, putting the primary product into a medium-temperature tunnel kiln, sintering at 1100-1200 ℃, and keeping the constant temperature for 0.5-1.0 h to obtain a medium product;
F. surface treatment: and (4) polishing the surface of the medium product to be smooth, and uniformly coating a wax layer or a glue layer to obtain a ceramic finished product.
Preferably, the ratio of the material balls in the wet ball mill in the step B is 1: 2.
Compared with the prior art, the invention has the following beneficial effects:
the microwave dielectric ceramic powder with high dielectric constant (r) and low dielectric loss (Q × F value) is prepared by adopting barium titanate materials and modifiers through a series of processing of powder proportioning, water milling, granulation, dry pressing, sintering and surface treatment on the basis of a solid-phase reaction method.
Drawings
FIG. 1 is a schematic view of the process of the present invention;
FIG. 2 is a graph of the dielectric constant versus test temperature of the present invention;
FIG. 3 is a graph of dielectric loss versus test temperature for the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to figures 1-3 of the drawings,
the first embodiment is as follows:
A. powder proportioning: weighing a certain amount of BaTiO according to the following weight percentage3A modifier;
BaTiO3: 96% and a modifier: 4 percent;
wherein, the raw material components in the modifier are as follows,
SrCO3：3%、Y2O3：1%；
B. water milling: mixing BaTiO3Putting the modifier into a lattice type wet ball mill, and performing ball milling for 10 hours, wherein the granularity of the ball-milled material is controlled to be 200 meshes and accounts for more than 95%;
C. and (3) granulation: feeding the ball-milled materials into a granulator for granulation to prepare powdery materials;
D. dry pressing and forming: filling the powdery material into a die, and applying a pressure of 12MPa to prepare a compact blank;
E. ① sintering, namely, putting the dense blank into a medium-temperature kiln, biscuiting at 900-950 ℃ to obtain a primary product, removing adsorption powder from the primary product ②, putting the primary product into a medium-temperature tunnel kiln, sintering at 1100-1200 ℃, and keeping the constant temperature for 0.5h to obtain a medium product;
F. surface treatment: and (4) polishing the surface of the medium product to be smooth, and uniformly coating a wax layer or a glue layer to obtain a ceramic finished product.
Example two:
A. powder proportioning: weighing a certain amount of BaTiO according to the following weight percentage3A modifier;
BaTiO3: 97%, modifier: 3 percent;
wherein, the raw material components in the modifier are as follows,
SrCO3：2.5%、Y2O3：0.5%；
B. water milling: mixing BaTiO3Putting the modifier into a lattice type wet ball mill, and performing ball milling for 10 hours, wherein the granularity of the ball-milled material is controlled to be 200 meshes and accounts for more than 95%;
C. and (3) granulation: feeding the ball-milled materials into a granulator for granulation to prepare powdery materials;
D. dry pressing and forming: filling the powdery material into a die, and applying a pressure of 12MPa to prepare a compact blank;
E. ① sintering, namely, putting the dense blank into a medium-temperature kiln, biscuiting at 900-950 ℃ to obtain a primary product, removing adsorption powder from the primary product ②, putting the primary product into a medium-temperature tunnel kiln, sintering at 1100-1200 ℃, and keeping the constant temperature for 0.5h to obtain a medium product;
F. surface treatment: and (4) polishing the surface of the medium product to be smooth, and uniformly coating a wax layer or a glue layer to obtain a ceramic finished product.
Example three:
A. powder proportioning: weighing a certain amount of BaTiO according to the following weight percentage3A modifier;
BaTiO3: 98.5%, modifier: 1.5 percent;
wherein, the raw material components in the modifier are as follows,
SrCO3：1%、Y2O3：0.5%；
B. water milling: putting BaTiO3 and a modifier into a lattice type wet ball mill, and carrying out ball milling for 15h, wherein the granularity of the ball-milled material is controlled to be 200 meshes and is more than 95%;
C. and (3) granulation: feeding the ball-milled materials into a granulator for granulation to prepare powdery materials;
D. dry pressing and forming: filling the powdery material into a die, and applying a pressure of 15MPa to prepare a compact blank;
E. ① sintering, namely, putting the dense blank into a medium-temperature kiln, biscuiting at 900-950 ℃ to obtain a primary product, removing adsorption powder from the primary product ②, putting the primary product into a medium-temperature tunnel kiln, sintering at 1100-1200 ℃, and keeping the constant temperature for 1h to obtain a medium product;
F. surface treatment: and (4) polishing the surface of the medium product to be smooth, and uniformly coating a wax layer or a glue layer to obtain a ceramic finished product.
Table one:
example one Example two EXAMPLE III
High dielectric constant (ε r) 350 337 325
Low dielectric loss (Q × F value) 6.5 6.2 6.1
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1.5G communication high dielectric ceramic powder for filter, its characterized in that: the raw material components of the material are as follows,
BaTiO3(barium titanate): 96% -98.5%, modifier: 1.5% -4%;
the raw material components in the modifier are as follows,
SrCO3(strontium carbonate): 1% -3% of Y2O3(yttrium oxide): 0.5 to 1 percent.
2. The ceramic powder for a 5G communication high-dielectric ceramic filter according to claim 1, wherein: the BaTiO3、SrCO3And Y2O3The purity of the compounds is more than or equal to 99.5 percent.
3. The method for preparing the ceramic powder for the 5G communication high-dielectric ceramic filter according to any one of claims 1 to 2, wherein the method comprises the following steps: the method comprises the following steps:
A. powder proportioning: weighing a certain amount of BaTiO3 and a modifier according to the weight percentage;
B. water milling: mixing BaTiO3Putting the modifier into a lattice type wet ball mill, and performing ball milling for 10-15 h, wherein the granularity of the ball-milled material is controlled to be 200 meshes and accounts for more than 95%;
C. and (3) granulation: feeding the ball-milled materials into a granulator for granulation to prepare powdery materials;
D. dry pressing and forming: filling the powdery material into a die, and applying a pressure of 12-15 MPa to prepare a compact blank;
E. ① sintering, namely, putting the dense blank into a medium-temperature kiln, biscuiting at 900-950 ℃ to obtain a primary product, removing adsorption powder from the primary product ②, putting the primary product into a medium-temperature tunnel kiln, sintering at 1100-1200 ℃, and keeping the constant temperature for 0.5-1.0 h to obtain a medium product;
F. surface treatment: and (4) polishing the surface of the medium product to be smooth, and uniformly coating a wax layer or a glue layer to obtain a ceramic finished product.
4. The method for preparing the ceramic powder for the 5G communication high-dielectric ceramic filter according to claim 3, wherein the method comprises the following steps: and the material ball ratio in the wet ball mill in the step B is 1: 2.
CN202010379801.9A 2020-05-08 2020-05-08 Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof Withdrawn CN111499376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010379801.9A CN111499376A (en) 2020-05-08 2020-05-08 Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010379801.9A CN111499376A (en) 2020-05-08 2020-05-08 Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof

Publications (1)

Publication Number Publication Date
CN111499376A true CN111499376A (en) 2020-08-07

Family

ID=71870023

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010379801.9A Withdrawn CN111499376A (en) 2020-05-08 2020-05-08 Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111499376A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112010649A (en) * 2020-09-08 2020-12-01 中物院成都科学技术发展中心 Low-cost ceramic substrate large-scale preparation method for filter
CN114988877A (en) * 2022-06-15 2022-09-02 桂林理工大学 Ultralow-loss microwave dielectric ceramic material and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112010649A (en) * 2020-09-08 2020-12-01 中物院成都科学技术发展中心 Low-cost ceramic substrate large-scale preparation method for filter
CN114988877A (en) * 2022-06-15 2022-09-02 桂林理工大学 Ultralow-loss microwave dielectric ceramic material and preparation method thereof
CN114988877B (en) * 2022-06-15 2023-08-29 桂林理工大学 Ultralow-loss microwave dielectric ceramic material and preparation method thereof

Similar Documents

Publication Publication Date Title
CN111763083B (en) Low-temperature sintered ultralow-loss microwave dielectric ceramic and preparation method and application thereof
CN111592348A (en) Low-dielectric-constant microwave dielectric ceramic with excellent temperature stability and preparation method thereof
CN111423225A (en) Cordierite microwave dielectric ceramic material and preparation method thereof
CN111517789B (en) Low-dielectric microwave dielectric ceramic material and preparation method thereof
CN111499376A (en) Ceramic powder for 5G communication high-dielectric ceramic filter and preparation method thereof
CN103833351B (en) Microwave dielectric ceramic and preparation method thereof
CN105254293A (en) Microwave dielectric ceramic material and preparation method thereof
CN102969549B (en) Novel medium cavity filter with cavity
CN112266232A (en) Low-dielectric microwave dielectric ceramic material suitable for 5G millimeter wave communication application and preparation method thereof
CN106747435B (en) A kind of preparation method for the core-shell structure microwave-medium ceramics that temperature is stable
CN111004030A (en) MgTiO (magnesium-titanium-oxide) powder3Microwave-based dielectric ceramic and preparation method thereof
CN112876229B (en) Microwave ceramic and preparation method thereof
CN110885243A (en) Low-dielectric-constant aluminate microwave dielectric ceramic material and preparation method thereof
CN101967058A (en) High Q value microwave medium ceramic and preparation method thereof
CN111499375B (en) High-quality-factor microwave dielectric ceramic material and preparation method thereof
CN110845226A (en) Microwave dielectric ceramic material SrGa2O4And method for preparing the same
CN108178618B (en) 99 aluminum oxide ceramic and preparation method thereof
CN111943670B (en) LiWVO 6 -K 2 MoO 4 Base composite ceramic microwave material and preparation method thereof
CN113387695A (en) Low-dielectric high-quality microwave dielectric ceramic for 5G communication and preparation method thereof
CN112851333B (en) high-Q-value microwave dielectric ceramic material and preparation method thereof
CN113943147A (en) Preparation method of dielectric ceramic material
CN113072373A (en) Temperature-stable low-dielectric ceramic material suitable for 5G millimeter wave communication application and preparation method thereof
CN112811890A (en) Low-temperature sintered low-dielectric constant microwave ceramic material and preparation method thereof
CN112759383A (en) Microwave dielectric ceramic with medium dielectric constant and preparation method thereof
JP2005532246A (en) Aluminum oxide ceramic components and methods

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20200807

WW01 Invention patent application withdrawn after publication