CN106966713A - A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic - Google Patents

A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic Download PDF

Info

Publication number
CN106966713A
CN106966713A CN201710188228.1A CN201710188228A CN106966713A CN 106966713 A CN106966713 A CN 106966713A CN 201710188228 A CN201710188228 A CN 201710188228A CN 106966713 A CN106966713 A CN 106966713A
Authority
CN
China
Prior art keywords
dielectric ceramic
hours
microwave dielectric
microwave
smbi
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.)
Pending
Application number
CN201710188228.1A
Other languages
Chinese (zh)
Inventor
李纯纯
栗满谦
常安
葛梦兰
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.)
Guilin University of Technology
Original Assignee
Guilin University of 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 Guilin University of Technology filed Critical Guilin University of Technology
Priority to CN201710188228.1A priority Critical patent/CN106966713A/en
Publication of CN106966713A publication Critical patent/CN106966713A/en
Pending legal-status Critical Current

Links

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
    • C04B35/44—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 aluminates
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • 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
    • C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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

Abstract

The invention discloses a kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic, it is characterised in that the chemical composition of the microwave dielectric ceramic is：SmBi4Al3O12.The preparation method step of the microwave dielectric ceramic is：(1) it is Sm more than 99.9% (percentage by weight) by purity2O3、Bi2O3And Al2O3Starting powder press SmBi4Al3O12Composition weigh dispensing；(2) by step (1) raw material wet ball-milling mix 12 hours, ball-milling medium is absolute ethyl alcohol, after drying in 1000 DEG C of air atmospheres pre-burning 6 hours；(3) after binding agent is added in powder made from step (2) and is granulated, re-compacted shaping is finally sintered 4 hours in 1050~1100 DEG C of air atmospheres；Described binding agent uses mass concentration for 5% poly-vinyl alcohol solution, and the addition of polyvinyl alcohol accounts for the 3% of powder gross mass.Ceramic post sintering prepared by the present invention is good, and dielectric constant reaches 11.5~12.3, and its quality factor q f values are up to 124000 156000GHz, and temperature coefficient of resonance frequency is small, industrially there is great application value.

Description

A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic
Technical field
The present invention relates to dielectric ceramic material, more particularly to for manufacturing ceramic substrate, the resonance that microwave frequency is used Dielectric ceramic material of microwave device such as device and wave filter and preparation method thereof.
Background technology
Microwave dielectric ceramic refers to be applied in microwave frequency band (mainly UHF and SHF frequency ranges) circuit as dielectric material And the ceramics of one or more functions are completed, it is widely used as resonator, wave filter, dielectric substrate and medium in modern communication The components such as wave circuit, are the key foundation materials of modern communication technology, in portable mobile phone, automobile telephone, nothing There is highly important application in terms of rope phone, television satellite recipient and military radar, in the small-sized of modern communication instrument Change, it is integrated during just playing increasing effect.
Applied to the dielectric ceramic of microwave frequency band, the requirement of following dielectric property should be met：(1) seriation permittivity εr To adapt to the requirement of different frequency and different application occasion；(2) high quality factor q value or low dielectric loss tan δ are to reduce Noise, typically requires Qf >=3000GHz；(3) the temperature coefficient τ of resonant frequencyfIt is as small as possible to ensure heat that device has had Stability, general -10ppm/ DEG C of requirement≤τf≤+10ppm/℃.Just had tried to electricity from late 1930s in the world Dielectric material is applied to microwave technology, and prepares TiO2Microwave dielectric filter, but its temperature coefficient of resonance frequency τfIt is too big and Can not be practical.Since the seventies in last century, the large-scale development to medium ceramic material is started, according to relative Jie Electric constant εrSize with using frequency range difference, generally the microwave-medium ceramics for having been developed that He developing can be divided into 4 Class.
(1) ultralow dielectric microwave dielectric ceramic, main representative is Al2O3-TiO2、Y2BaCuO5、MgAl2O4With Mg2SiO4Deng its εr≤ 20, quality factor q × f >=50000GHz, τf≤10ppm/℃.It is mainly used in microwave base plate and height Hold microwave device.
(2) low εrWith the microwave dielectric ceramic of high q-factor, mainly BaO-MgO-Ta2O5,BaO-ZnO-Ta2O5Or BaO- MgO-Nb2O5,BaO-ZnO-Nb2O5System or the hybrid system MWDC materials between them.Its εr=20~35, Q=(1~2) ×104(under f >=10GHz), τf≈0.It is mainly used in humorous as medium in the microwave communication equipments such as f >=8GHz direct broadcasting satellite Shake device.
(3) medium εrWith the microwave dielectric ceramic of Q values, it is mainly with BaTi4O9、Ba2Ti9O20(Zr, Sn) TiO4Etc. for The MWDC materials of base, its εr=35~45, Q=(6~9) × 103(under f=3~-4GHz), τf≤5ppm/℃.It is main to use Dielectric resonator device is used as in the microwave military radar and communication system in 4~8GHz frequency ranges.
(4) high εrAnd the relatively low microwave dielectric ceramic of Q values, it is mainly used in civilian movement in 0.8~4GHz frequency ranges and leads to News system, this is also the emphasis of microwave dielectric ceramic research.Since the eighties, Kolar, Kato et al. have found and have studied in succession Perovskite-like tungsten bronze type BaO-Ln2O3—TiO2Serial (Ln=La, Sm, Nd or Pr etc., abbreviation BLT systems), composite perofskite Structure C aO-Li2O—Ln2O3—TiO2Series, lead base series material, Ca1-xLn2x/3TiO3It is contour εrMicrowave dielectric ceramic, Wherein BaO-Nd of BLT systems2O3—TiO2Material dielectric constant reaches 90, lead base series (Pb, Ca) ZrO3Dielectric constant reaches To 105.
Due to three performance indications (ε of microwave dielectric ceramicrWith Qf and τf) between be the relation mutually restricted (see text Offer：Restricting relation between microwave dielectric ceramic materials dielectric properties, Zhu Jianhua, Liang Fei, Wang Xiaohong, Lv Wenzhong, electronic component with Material, phase March the 3rd in 2005), the single-phase microwave-medium ceramics for meeting three performance requirements are considerably less, and mainly theirs is humorous Vibration frequency temperature coefficient generally excessive or quality factor it is relatively low and can not application request.At present to microwave-medium ceramics It is the summary of experience drawn by many experiments that research is most of, but illustrates microstructure and dielectric without complete theory The relation of performance, therefore, can not also be predicted in theory from the composition and structure of compound its temperature coefficient of resonance frequency and The microwave dielectric properties such as quality factor, are explored and (- 10ppm/ DEG C≤τ of near-zero resonance frequency temperature coefficient of exploitationf≤+10ppm/ DEG C) with the serial differing dielectric constant microwave dielectric ceramic of higher figure of merit be those skilled in the art thirst for solving always but All the time it is difficult to the problem succeeded, which greatly limits the development of microwave dielectric ceramic and device.
The content of the invention
There is good thermal stability and low-loss ultralow dielectric micro-wave dielectric it is an object of the invention to provide one kind Ceramic material and preparation method thereof.
The chemical composition of the microwave dielectric ceramic material of the present invention is SmBi4Al3O12。
The preparation method step of this microwave dielectric ceramic material is：
(1) it is Sm more than 99.9% (percentage by weight) by purity2O3、Bi2O3And Al2O3Starting powder press SmBi4Al3O12Composition weigh dispensing.
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is absolute ethyl alcohol, at 1000 DEG C after drying Pre-burning 6 hours in air atmosphere.
(3) after binding agent is added in powder made from step (2) and is granulated, re-compacted shaping, finally 1050~ Sintered 4 hours in 1100 DEG C of air atmospheres；Described binding agent uses mass concentration for 5% poly-vinyl alcohol solution, polyethylene The addition of alcohol accounts for the 3% of powder gross mass.
Advantages of the present invention：SmBi4Al3O12Ceramics less than 1100 DEG C sintering well, dielectric constant reaches 11.5~ The temperature coefficient τ of 12.3, especially resonant frequencyfSmall, temperature stability is good；Quality factor q f values are up to 124000- 156000GHz, can be widely used for the manufacture of the microwave devices such as various medium substrates, resonator and wave filter, can meet low temperature and be total to The technology of burning technology and microwave multilayer device needs, and industrially has great application value.
Embodiment
Embodiment：
Table 1 shows 3 specific embodiments and its microwave dielectric property for constituting the different sintering temperatures of the present invention.It is made Preparation Method with X-ray diffraction analysis as described above, carried out material phase analysis, and it is cubic garnet knot as a result to show all ceramics Structure is single-phase；The evaluation of microwave dielectric property is carried out with cylindrical dielectric resonator method.
This ceramics can be widely used for the manufacture of the microwave devices such as various medium substrates, resonator and wave filter, can meet shifting The technology of the systems such as dynamic communication and satellite communication needs.
Table 1：

Claims (1)

1. a kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic, it is characterised in that the change of the microwave dielectric ceramic Learning composition is：SmBi4Al3O12；
The preparation method step of the microwave dielectric ceramic is：
(1) it is Sm more than 99.9% (percentage by weight) by purity2O3、Bi2O3And Al2O3Starting powder press SmBi4Al3O12 Composition weigh dispensing；
(2) step (1) raw material wet ball-milling is mixed 12 hours, ball-milling medium is distilled water, in 1000 DEG C of air gas after drying Pre-burning 6 hours in atmosphere；
(3) after binding agent is added in powder made from step (2) and is granulated, re-compacted shaping, finally at 1050~1100 DEG C Sintered 4 hours in air atmosphere；Described binding agent uses mass concentration for 5% poly-vinyl alcohol solution, and polyvinyl alcohol adds Dosage accounts for the 3% of powder gross mass.
CN201710188228.1A 2017-03-27 2017-03-27 A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic Pending CN106966713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710188228.1A CN106966713A (en) 2017-03-27 2017-03-27 A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710188228.1A CN106966713A (en) 2017-03-27 2017-03-27 A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic

Publications (1)

Publication Number Publication Date
CN106966713A true CN106966713A (en) 2017-07-21

Family

ID=59335457

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710188228.1A Pending CN106966713A (en) 2017-03-27 2017-03-27 A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic

Country Status (1)

Country Link
CN (1) CN106966713A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524792A (en) * 2003-02-28 2004-09-01 新加坡纳米材料科技有限公司 Method for preparing crystalline state perovskite compounds powder
CN104671784A (en) * 2015-02-03 2015-06-03 桂林理工大学 Temperature stabilizing type high-quality factor microwave dielectric ceramic Nd2La2W3O15 and preparation method thereof
CN106187160A (en) * 2016-07-19 2016-12-07 桂林理工大学 Low-loss temperature-stabilized microwave dielectric ceramic LiGaSn3o8

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1524792A (en) * 2003-02-28 2004-09-01 新加坡纳米材料科技有限公司 Method for preparing crystalline state perovskite compounds powder
CN104671784A (en) * 2015-02-03 2015-06-03 桂林理工大学 Temperature stabilizing type high-quality factor microwave dielectric ceramic Nd2La2W3O15 and preparation method thereof
CN106187160A (en) * 2016-07-19 2016-12-07 桂林理工大学 Low-loss temperature-stabilized microwave dielectric ceramic LiGaSn3o8

Similar Documents

Publication Publication Date Title
CN104671785B (en) Temperature-stable high quality factor microwave dielectric ceramic LaEuW2O9 and preparation method thereof
CN104671784B (en) Temperature-stable high quality factor microwave dielectric ceramic Nd2la2w3o15and preparation method thereof
CN104478408B (en) Ultralow dielectric microwave dielectric ceramic Li3si2b3o10and preparation method thereof
CN104446377B (en) Temperature-stable microwave dielectric ceramic LiZn2b3o7and preparation method thereof
CN104446439B (en) Dielectric constant microwave dielectric ceramic In6mgTi5o20and preparation method thereof
CN106830923A (en) High quality factor microwave dielectric ceramic Bi3Y2Ga3O12
CN106278191A (en) A kind of composite oxides Al2ca3mgSb2o12application as temperature-stable microwave dielectric ceramic
CN107010924A (en) A kind of temperature-stable gallate microwave dielectric ceramic
CN105503157B (en) Temperature-stable dielectric constant microwave dielectric ceramic Ba3Li2Ge2O8And preparation method thereof
CN107010952A (en) A kind of gallate ultralow dielectric microwave dielectric ceramic
CN106986627A (en) A kind of borate dielectric constant microwave dielectric ceramic of bismuth-containing
CN104446433B (en) Temperature-stable ultralow dielectric microwave dielectric ceramic Li3al2p3o12
CN106220147A (en) A kind of composite oxides NaAl3ca2sb2o12application as temperature-stable microwave dielectric ceramic
CN106946548A (en) A kind of high quality factor gallate microwave dielectric ceramic
CN106927828A (en) A kind of temperature-stable indate microwave dielectric ceramic
CN106927829A (en) A kind of yttrate high quality factor microwave dielectric ceramic
CN104446469B (en) Ultra-low loss microwave dielectric ceramic Li3v2b3o11and preparation method thereof
CN104478409B (en) Temperature-stable microwave dielectric ceramic Li2alB3o7and preparation method thereof
CN106986641A (en) A kind of borate ultralow dielectric microwave dielectric ceramic containing vanadium
CN106986645A (en) A kind of molybdate temperature-stable ultralow dielectric microwave dielectric ceramic
CN106966713A (en) A kind of low-loss aluminate ultralow dielectric microwave dielectric ceramic
CN106986639A (en) A kind of borate ultralow dielectric microwave dielectric ceramic of bismuth-containing
CN106966725A (en) A kind of molybdate ultralow dielectric microwave dielectric ceramic containing indium
CN106830924A (en) A kind of low-loss gallate ultralow dielectric microwave dielectric ceramic
CN106927812A (en) A kind of low-loss ultralow dielectric microwave dielectric ceramic

Legal Events

Date Code Title Description
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170721

RJ01 Rejection of invention patent application after publication