CN110156465B - Preparation method of ceramic dielectric resonator material with medium dielectric constant - Google Patents

Preparation method of ceramic dielectric resonator material with medium dielectric constant Download PDF

Info

Publication number
CN110156465B
CN110156465B CN201910495198.8A CN201910495198A CN110156465B CN 110156465 B CN110156465 B CN 110156465B CN 201910495198 A CN201910495198 A CN 201910495198A CN 110156465 B CN110156465 B CN 110156465B
Authority
CN
China
Prior art keywords
dielectric constant
dielectric
ball milling
resonator material
dielectric resonator
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.)
Active
Application number
CN201910495198.8A
Other languages
Chinese (zh)
Other versions
CN110156465A (en
Inventor
杨欣烨
刘文华
刘一博
江凡
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.)
Nanjing University of Information Science and Technology
Original Assignee
Nanjing University of Information Science and Technology
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 Nanjing University of Information Science and Technology filed Critical Nanjing University of Information Science and Technology
Priority to CN201910495198.8A priority Critical patent/CN110156465B/en
Publication of CN110156465A publication Critical patent/CN110156465A/en
Application granted granted Critical
Publication of CN110156465B publication Critical patent/CN110156465B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth 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
    • 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
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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

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

Abstract

The invention relates to a medium dielectric constant ceramic dielectric resonator material, the chemical expression of which is as follows: (Ca0.65+ xSm0.65+ x) (Ti0.65Al0.35+ x) O4-delta, wherein x is 0-0.1. The dielectric constant is 35-42, the quality factor Qxf is larger than 50000GHz, and the frequency temperature coefficient tau f is within the range of +/-10 ppm/DEG C. The comprehensive microwave dielectric property is good, so that the types of the microwave porcelain with the medium dielectric constant are increased, and a new choice is provided for the design of microwave devices such as a filter, a dielectric resonator and the like. In addition, the preparation method is a traditional solid phase method, so that the process is simple and the method is suitable for mass production.

Description

Preparation method of ceramic dielectric resonator material with medium dielectric constant
Technical Field
The invention belongs to the technical field of ceramic dielectric material manufacturing, and particularly relates to a ceramic dielectric resonator material with a medium dielectric constant, a high quality factor and a near-zero temperature coefficient and a preparation method thereof.
Background
In recent years, microwave dielectric materials are used as important components of microwave devices, are used in microwave frequency band integrated circuits, are widely applied to radio technology, and become an indispensable part of modern people's lives, ranging from satellite communication, satellite remote sensing devices, to mobile communication, GPS navigation and television cable systems. In order to increase carrier frequency and expand user capacity, higher-performance and smaller-size dielectric resonators are required to be matched with mobile communication and microwave communication including Intelligent Transportation Systems (ITS). Microwave dielectric ceramics are the most suitable dielectric materials, so that the attention is paid, and the preparation of high-performance ceramic dielectric resonator materials has become a hot research spot at home and abroad in recent decades.
In the face of different application performance requirements, there are a wide variety of dielectric ceramics. For microwave dielectric ceramic materials, the overall performance requirements are: higher relative dielectric constant εrTo ensure a smaller resonator size; the quality factor Qxf is high so as to ensure excellent frequency selection; near zero temperature coefficientfThereby ensuring the temperature stability of the device. For medium dielectric constant εrAbout 40, two systems are developed at present. One is BaO-TiO2The system is prepared by a traditional solid phase method, and the optimal performance obtained by sintering at 1350 ℃ is epsilonr＝37～38，Q×f＝50000GHz，τf+15ppm/° c. The other is (Zr, Sn) TiO4The ceramic has high sintering temperature, and the solid phase method obtains excellent performance after being sintered at 1600 ℃: epsilonr＝39，Q×f＝51000GHz，τf＝0ppm/℃。
CaTiO3Is a high dielectric constant (. epsilon.)r170) has a large negative temperature coefficient τ of its ownf-800ppm/° c. And rare earth aluminate LnAlO3Is a microwave dielectric material with high quality factor, and the temperature coefficient is negative. The solid solution formed by the two can obtain the dielectric material with the temperature coefficient of near zero frequency through the coordination effect. An article CaTiO 2003 in the Journal of the European Ceramic Society3-LnMO3Microwave dielectric properties (Microwave dielectric properties of ceramics based on CaTiO) of (Ln ═ La, Nd, M ═ Al, Ga) series ceramics3-LnMO3system) has a dielectric constant of 43 to 48 and a quality factor of Qxf>40000GHz，τf0 solid solution ceramic. Provided that xCaTiO is adjusted3-(1-x)LnAlO3The dielectric constant of the solid solution material is between 39 and 43, and meanwhile, the high quality factor and the near-zero temperature coefficient of the resonant frequency are ensured, so that the application prospect of the microwave dielectric porcelain of the system is wider. In the US patent 6881694B2, a basic composition xCaTiO is disclosed3-(1-x)ReAlO3(0.54. ltoreq. x. ltoreq.0.82, Re is La element alone or a combination of La, Nd, Sm) and Ta2O5、MnO2And Na2O as a dopant, a series of materials having dielectric constants varying from 36 to 51 were developed, and when x is 0.55, the dielectric constant ∈ obtainedrIs 40.1, the quality factor Qxf is 36900GHz, tauf-29.8ppm/° c. It can be seen that although the dielectric constant is large, the dielectric loss is relatively high and the temperature stability is also to be improved. U.S. Pat. No. 4, 7732362, 2 discloses formulations of xCaTiO3+(1-x)SmzRe(1-z)AlO3(wherein Re is lanthanide, 0.3-0.3 ≤)z is less than or equal to 0.995, x is less than or equal to 0.5 and less than or equal to 0.9) and has the advantage that the dielectric constant epsilonr43 to 45, quality factor Qxf>20000GHz, temperature coefficient of resonance frequency tauf10 ppm/deg.C, where the optimum performance is εr＝43，Q×f＝46600GHz，τf0.4 ppm/deg.C. However, when the dielectric constant is further reduced to 39-42, the corresponding dielectric loss is not reduced, which gives the following results: x is 0.69 and z is 0.2, epsilonr＝39.1，Q×f＝20800GHz，τf-49ppm/° c. How to make CaTiO3The base microwave dielectric ceramic has a higher Qxf value in the range of medium dielectric constant of 35-42, and simultaneously ensures taufThe value of +/-10 ppm/DEG C is the problem to be solved by the invention.
Disclosure of Invention
The invention aims to provide a ceramic dielectric resonator material with a dielectric constant of 35-42, a quality factor of more than 50000GHz and a near-zero temperature coefficient and a preparation method thereof.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a dielectric constant ceramic dielectric resonator material, the chemical expression of which is: (Ca)0.65+xSm0.65+x)(Ti0.65Al0.35+x)O4-δWherein x is 0 to 0.1.
The dielectric constant is 35-42, the quality factor Qxf is larger than 50000GHz, and the temperature coefficient of frequency taufWithin a range of + -10 ppm/. degree.C.
The preparation method of the ceramic dielectric resonator material with the medium dielectric constant comprises the following steps:
1) weighing the raw materials of calcium carbonate, samarium oxide, titanium dioxide and aluminum oxide according to a stoichiometric ratio, putting the raw materials into a nylon ball milling tank, adding deionized water and zirconium balls, and carrying out ball milling for 12-24 hours;
2) drying the fully mixed slurry in an oven at 100-120 ℃, grinding, and sieving by using a 120-mesh sieve to obtain uniform mixed powder;
3) presintering the mixed powder obtained in the step 2) in air at 1050-1400 ℃ for 3h, and then grinding;
4) adding deionized water into the ground powder obtained in the step 3) for secondary ball milling, wherein the ball milling time is 6-24 h;
5) drying the slurry subjected to the secondary ball milling in an oven at 100-120 ℃, grinding and sieving;
6) and adding a proper amount of 5wt% PVA into the sieved powder for granulation, preparing a cylindrical sample through dry pressing, sintering in air at 1350-1450 ℃, and preserving heat for 3 hours.
Wherein, the purities of the raw materials of calcium carbonate, samarium oxide, titanium dioxide and aluminum oxide are all more than 99 percent.
Further, the cylindrical sample had a diameter of 10mm and a height of 4.5 to 6 mm.
Further, the surface of the sample is polished by sand paper, and the microwave dielectric property is tested by using a network analyzer.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts a solid phase method to prepare (Ca) with excellent performance0.65+xSm0.65+x)(Ti0.65Al0.35+x)O4-δThe ceramic dielectric resonator material has a dielectric constant of 35-42 and a quality factor of Qxf>50000GHz, simultaneous frequency temperature coefficientfWithin a range of + -10 ppm/. degree.C. The comprehensive microwave dielectric property is good, so that the types of the microwave porcelain with the medium dielectric constant are increased, and a new choice is provided for the design of microwave devices such as a filter, a dielectric resonator and the like. In addition, the preparation method is a traditional solid phase method, so that the process is simple and the method is suitable for mass production.
Drawings
FIG. 1: a micrograph of the ceramic material in example 3.
Detailed Description
The invention utilizes a solid-phase reaction method to prepare microwave dielectric porcelain with high quality factor, medium dielectric constant and good temperature stability, and the composition of the microwave dielectric porcelain is as follows:
(Ca0.65+xSm0.65+x)(Ti0.65Al0.35+x)O4-δwherein x is 0 to 0.1.
The invention adopts the traditional solid phase reaction method to prepare the ceramic material, the starting raw materials comprise calcium carbonate, samarium oxide, titanium dioxide and aluminum oxide, and the purity of each starting raw material is more than 99 percent.
The microwave dielectric material with medium dielectric constant and high quality factor is prepared according to the following specific steps:
(1) weighing the raw materials according to a stoichiometric ratio, putting the raw materials into a nylon ball milling tank, adding deionized water and zirconium balls, and carrying out ball milling for 12-24 hours; (2) drying the fully mixed slurry in an oven at 100-120 ℃, grinding, and sieving by using a 120-mesh sieve to obtain uniform mixed powder;
(3) presintering the powder obtained in the step (2) in air at 1050-1400 ℃ for 3h, and then grinding;
(4) adding deionized water into the powder obtained in the step (3) for secondary ball milling, wherein the ball milling time is 6-24 hours;
(5) drying the slurry subjected to the secondary ball milling in an oven at 100-120 ℃, grinding and sieving;
(6) adding a proper amount of 5wt% PVA into the sieved powder for granulation, preparing a cylindrical sample with the diameter of 10mm and the height of 4.5-6mm through dry pressing, sintering in air at 1350-1450 ℃, and preserving heat for 3 hours;
(7) and (5) grinding and polishing the surface of the sample by using sand paper, and testing the microwave dielectric property by using a network analyzer.
4 specific examples are set forth below, but these are not intended to limit the scope of the present invention.
Example 1
According to the above process steps, the composition (Ca) is prepared0.68Sm0.68)(Ti0.65Al0.38)O4-δThe ceramic powder of (2) is sintered for 3 hours at 1385 ℃. After grinding and polishing, the dielectric constant epsilon of all samples is tested by using a cylindrical dielectric resonant cavity methodrPlacing the fixture in an incubator to test the resonant frequency temperature coefficient tau of the samplefWherein the temperature is varied within the range of 25 ℃ to 85 ℃. All samples were tested for quality factor Q x f values using cylindrical cavity resonance. The dielectric constant epsilon of the ceramic dielectric resonator material of the invention is testedr40.4, quality factor Qxf 50870GHz, resonant frequencyTemperature coefficient taufAt-9.7 ppm/deg.C.
Example 2
According to the above process steps, the composition (Ca) is prepared0.7Sm0.7)(Ti0.65Al0.4)O4-δThe ceramic powder is sintered for 3 hours at the temperature of 1415 ℃. After grinding and polishing, the dielectric constant epsilon of all samples is tested by using a cylindrical dielectric resonant cavity methodrPlacing the fixture in an incubator to test the resonant frequency temperature coefficient tau of the samplefWherein the temperature is varied within the range of 25 ℃ to 85 ℃. All samples were tested for quality factor Q x f values using cylindrical cavity resonance. The dielectric constant epsilon of the ceramic dielectric resonator material of the invention is testedr39.45, Q × f 51450GHz, and temperature coefficient of resonance frequency taufAt-8.9 ppm/deg.C.
Example 3
According to the above process steps, the composition (Ca) is prepared0.73Sm0.73)(Ti0.65Al0.43)O4-δThe ceramic powder is sintered for 3 hours at the temperature of 1415 ℃. After grinding and polishing, the dielectric constant epsilon of all samples is tested by using a cylindrical dielectric resonant cavity methodrPlacing the fixture in an incubator to test the resonant frequency temperature coefficient tau of the samplefWherein the temperature is varied within the range of 25 ℃ to 85 ℃. All samples were tested for quality factor Q x f values using cylindrical cavity resonance. The dielectric constant epsilon of the ceramic dielectric resonator material of the invention is testedr39.36, Q × f is 52270GHz, and the temperature coefficient of resonance frequency is τfAt-8.6 ppm/deg.C.
Example 4
According to the above process steps, the composition (Ca) is prepared0.75Sm0.75)(Ti0.65Al0.45)O4-δThe ceramic powder is sintered for 3 hours at the temperature of 1415 ℃. After grinding and polishing, the dielectric constant epsilon of all samples is tested by using a cylindrical dielectric resonant cavity methodrPlacing the fixture in an incubator to test the resonant frequency temperature coefficient tau of the samplefWherein the temperature is varied within the range of 25 ℃ to 85 ℃. All samples were tested for quality factor Q x f values using cylindrical cavity resonance. Tested the present inventionDielectric constant epsilon of bright ceramic dielectric resonator materialr38.76, a quality factor Qxf of 50780GHz, and a temperature coefficient of resonance frequency τfAt-9.3 ppm/deg.C.
In the embodiment, the dielectric constant is 35-42, the quality factor Qxf is more than or equal to 50000GHz, and the near-zero temperature coefficient (tau) is prepared by adopting the traditional solid phase sintering methodf10 ppm/deg.C) of a ceramic dielectric resonator material. With the conventional medium dielectric constant material BaO-TiO2Series and (Zr, Sn) TiO4Compared with the microwave dielectric material, the material has greater advantages in the aspect of microwave performance and has wide application prospect.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.

Claims (4)

1. A medium dielectric constant ceramic dielectric resonator material, characterized by: the chemical expression of the medium dielectric constant ceramic dielectric resonator material is as follows: (Ca)0.65+xSm0.65+x)(Ti0.65Al0.35+x)O4-δWherein x = 0-0.1; the dielectric constant is 35-42, the quality factor Qxf is larger than 50000GHz, and the temperature coefficient of frequency taufWithin a range of + -10 ppm/° C; the preparation method comprises the following steps:
1) weighing the raw materials of calcium carbonate, samarium oxide, titanium dioxide and aluminum oxide according to a stoichiometric ratio, putting the raw materials into a nylon ball milling tank, adding deionized water and zirconium balls, and carrying out ball milling for 12-24 hours;
2) drying the fully mixed slurry in an oven at 100-120 ℃, grinding, and sieving by using a 120-mesh sieve to obtain uniform mixed powder;
3) pre-burning the mixed powder obtained in the step 2) in air at 1050-1400 ℃ for 3h, and then grinding;
4) adding deionized water into the ground powder obtained in the step 3) for secondary ball milling, wherein the ball milling time is 6-24 h;
5) drying the slurry subjected to the secondary ball milling in an oven at 100-120 ℃, grinding and sieving;
6) and adding a proper amount of 5wt% PVA into the sieved powder for granulation, preparing a cylindrical sample through dry pressing, sintering in air at 1350-1450 ℃, and preserving heat for 3 hours.
2. The dielectric constant ceramic dielectric resonator material according to claim 1, wherein: the purities of the raw materials of calcium carbonate, samarium oxide, titanium dioxide and aluminum oxide are all more than 99 percent.
3. The dielectric constant ceramic dielectric resonator material according to claim 1, wherein: the cylindrical sample had a diameter of 10mm and a height of 4.5-6 mm.
4. The dielectric constant ceramic dielectric resonator material according to claim 1, wherein: and (5) grinding and polishing the surface of the sample by using sand paper, and testing the microwave dielectric property by using a network analyzer.
CN201910495198.8A 2019-06-10 2019-06-10 Preparation method of ceramic dielectric resonator material with medium dielectric constant Active CN110156465B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910495198.8A CN110156465B (en) 2019-06-10 2019-06-10 Preparation method of ceramic dielectric resonator material with medium dielectric constant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910495198.8A CN110156465B (en) 2019-06-10 2019-06-10 Preparation method of ceramic dielectric resonator material with medium dielectric constant

Publications (2)

Publication Number Publication Date
CN110156465A CN110156465A (en) 2019-08-23
CN110156465B true CN110156465B (en) 2021-12-28

Family

ID=67628037

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910495198.8A Active CN110156465B (en) 2019-06-10 2019-06-10 Preparation method of ceramic dielectric resonator material with medium dielectric constant

Country Status (1)

Country Link
CN (1) CN110156465B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111302787A (en) * 2020-04-03 2020-06-19 厦门松元电子有限公司 Microwave dielectric ceramic material with high Qf and high strength and preparation method thereof
CN112592195A (en) * 2020-12-02 2021-04-02 无锡市高宇晟新材料科技有限公司 Complex phase microwave dielectric ceramic material and preparation method thereof
CN113213932A (en) * 2021-05-28 2021-08-06 齐鲁工业大学 Calcium-samarium-titanium microwave dielectric ceramic and preparation method thereof
CN113480303B (en) * 2021-07-27 2023-01-17 华中科技大学温州先进制造技术研究院 Aluminate-based low-dielectric microwave dielectric ceramic and preparation method thereof
CN116969760A (en) * 2023-08-01 2023-10-31 陕西华星电子开发有限公司 Ca-Sm-Al-Ti-based microwave dielectric ceramic material and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001114553A (en) * 1999-10-18 2001-04-24 Ngk Spark Plug Co Ltd Microwave dielectric substance ceramic composition
CN102603287A (en) * 2012-03-15 2012-07-25 南京工业大学 Microwave dielectric ceramic with intermediate dielectric constant and method for preparing microwave dielectric ceramic
CN105000884A (en) * 2015-08-18 2015-10-28 广东国华新材料科技股份有限公司 Microwave dielectric ceramic material as well as preparation method and application thereof
CN106187189A (en) * 2016-07-11 2016-12-07 福州大学 A kind of energy storage microwave dielectric ceramic materials and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001114553A (en) * 1999-10-18 2001-04-24 Ngk Spark Plug Co Ltd Microwave dielectric substance ceramic composition
CN102603287A (en) * 2012-03-15 2012-07-25 南京工业大学 Microwave dielectric ceramic with intermediate dielectric constant and method for preparing microwave dielectric ceramic
CN105000884A (en) * 2015-08-18 2015-10-28 广东国华新材料科技股份有限公司 Microwave dielectric ceramic material as well as preparation method and application thereof
CN106187189A (en) * 2016-07-11 2016-12-07 福州大学 A kind of energy storage microwave dielectric ceramic materials and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Synthesis of 0.65CaTiO(3)-0.35SmAlO(3) ceramics and effects of La2O3/SrO doping on their microwave dielectric properties;Zhang, Liming等;《JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS》;20181231;第29卷(第4期);全文 *

Also Published As

Publication number Publication date
CN110156465A (en) 2019-08-23

Similar Documents

Publication Publication Date Title
CN110156465B (en) Preparation method of ceramic dielectric resonator material with medium dielectric constant
US20200123059A1 (en) Boron aluminum silicate mineral material, low temperature co-fired ceramic composite material, low temperature co-fired ceramic, composite substrate and preparation methods thereof
CN103482978B (en) Solid-solution microwave dielectric ceramic material, and preparation method and application thereof
JP2003531808A (en) Low-temperature sintering low-loss dielectric ceramic composition for high frequency and method for producing the same
CN105254293B (en) A kind of microwave dielectric ceramic materials and preparation method thereof
CN110282968A (en) A kind of microwave dielectric ceramic materials and preparation method thereof
CN110790576A (en) Microwave ceramic powder material and preparation method thereof
CN112851346B (en) Ultralow-loss zirconium magnesium niobate system microwave dielectric ceramic material and preparation method thereof
CN113321496B (en) Composite microwave dielectric ceramic material and preparation method thereof
CN106064942B (en) high-Curie-temperature lead-free SNKBT piezoelectric ceramic and preparation method thereof
CN108059454B (en) Temperature-stable high-dielectric-constant microwave dielectric ceramic and preparation method and application thereof
CN108147809B (en) Medium-low temperature sintered barium-titanium series microwave dielectric material and preparation method thereof
CN107382313B (en) Microwave dielectric ceramic with ultrahigh quality factor, medium-low dielectric constant and near-zero temperature coefficient and preparation method thereof
CN105669195B (en) Low dielectric constant and high Q value microwave dielectric ceramic materials and preparation method thereof
CN111004030A (en) MgTiO (magnesium-titanium-oxide) powder3Microwave-based dielectric ceramic and preparation method thereof
CN106007707B (en) Mg-Nb doped bismuth titanate microwave-medium ceramics and preparation method thereof
CN110903078A (en) Ultralow dielectric constant LTCC microwave ceramic material and preparation method thereof
CN111960821B (en) Microwave dielectric ceramic material and preparation method and application thereof
CN114409396B (en) High-temperature stable microwave dielectric ceramic for WIFI and preparation method thereof
CN105060888A (en) Low-loss stable niobic acid neodymium ceramic prepared through aluminum oxide doping
CN109354495A (en) Magnesium zirconium niobium antimony series microwave dielectric ceramic and preparation method and application
CN115057698A (en) Low-dielectric calcium garnet type microwave dielectric ceramic material and preparation method thereof
JPS62170102A (en) Dielectric ceramic and making thereof
CN102030527B (en) BaO-TiO2 microwave capacitor dielectric material and preparation method thereof
CN108002833B (en) Microwave dielectric ceramic material with hexagonal perovskite structure and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant