CN112430104A - Composite additive for preparing ceramic and preparation method and application thereof - Google Patents

Composite additive for preparing ceramic and preparation method and application thereof Download PDF

Info

Publication number
CN112430104A
CN112430104A CN202011429005.8A CN202011429005A CN112430104A CN 112430104 A CN112430104 A CN 112430104A CN 202011429005 A CN202011429005 A CN 202011429005A CN 112430104 A CN112430104 A CN 112430104A
Authority
CN
China
Prior art keywords
additive
composite
powder
ceramic
fluxing
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
CN202011429005.8A
Other languages
Chinese (zh)
Inventor
康文涛
卢玉厚
蒋勇
曾民裕
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.)
Loudi Antaeus Electronic Ceramics Co ltd
Original Assignee
Loudi Antaeus Electronic Ceramics 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 Loudi Antaeus Electronic Ceramics Co ltd filed Critical Loudi Antaeus Electronic Ceramics Co ltd
Priority to CN202011429005.8A priority Critical patent/CN112430104A/en
Publication of CN112430104A publication Critical patent/CN112430104A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00Powdered glass; Bead compositions
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10Shaped 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 aluminium oxide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64Burning or sintering processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a composite additive for preparing ceramics, a preparation method and an application thereof, wherein the composite additive comprises the following components in parts by mass: 5-7 parts of fluxing additive, 2-3 parts of solid solution additive and 1-2 parts of grain inhibiting additive; the fluxing additive is in the form of glass powder. The preparation method comprises the following steps: (1) carrying out composite reaction on the raw materials at high temperature to obtain fluxing additive glass powder; (2) heating, activating and ball-milling the solid solution additive to obtain first powder; (3) performing ball milling on the grain inhibiting additive to obtain second powder; (4) and mixing the glass powder, the first type of powder and the second type of powder, and then carrying out ball milling to obtain the composite additive. The composite additive is applied to the preparation process of alumina ceramics, and can improve the mechanical property and the performance stability of the ceramic finished product.

Description

Composite additive for preparing ceramic and preparation method and application thereof
Technical Field
The invention relates to the field of ceramic additives, in particular to a composite additive for preparing ceramic and a preparation method and application thereof.
Background
Alumina ceramicsThe ceramic material is widely applied to structural ceramics, has excellent electrical performance under high frequency, and has the advantages of small dielectric loss, large volume resistivity, high strength, large hardness, small linear expansion coefficient, and good wear resistance and heat resistance. The alumina ceramics currently produced in China have 75 percent of porcelain (75 percent of Al)2O3) 90 ceramics (90% Al)2O3) 95 porcelain (95% Al)2O3) 99% of ceramic (99% Al)2O3) And the like. The alumina ceramic has the characteristic that various electromechanical properties are improved along with the increase of the content of alumina, but the defect that the increase of the content of alumina can increase the sintering temperature, thereby bringing certain difficulty to the sintering process. Therefore, it is generally economical and practical to use 90% to 96% of alumina ceramics.
The sintering temperature of 95 alumina ceramics reaches 1700 ℃, the requirements on a kiln, a sagger and a burning bearing plate are high, the energy consumption is high, and the sintering cost is high; during the sintering process of the alumina ceramic, alpha-alumina crystal grains grow up, and if the alpha-alumina crystal grains are not controlled, the performance of the product is deteriorated; therefore, when the formula of the alumina ceramic is designed, various additives are added, and in the actual production, the various additives are weighed and then added with the main raw materials for processing and production, the mechanical property dispersibility of the material is large, for example, the average bending strength is about 280MPa, the actual distribution is 230 MPa-320 MPa, and the surface Hardness (HV)5) The average value is about 980, the actual distribution is 940-1050, the material performance is unstable, the reliability is poor, and the application of the material is limited.
Disclosure of Invention
The invention provides a composite additive for preparing ceramics and a preparation method thereof, which are used for solving the technical problems of high sintering temperature and unstable performance of materials obtained after sintering of the conventional alumina ceramics.
In order to solve the technical problems, the invention adopts the following technical scheme:
a composite additive for preparing ceramics comprises the following components in parts by mass: 5-7 parts of fluxing additive, 2-3 parts of solid solution additive and 1-2 parts of grain inhibiting additive; the fluxing additive is in the form of glass powder.
The design idea of the technical scheme is that the fluxing additive added in the invention can be melted into a liquid phase at a medium temperature to promote the sintering of the ceramic, the solid solution additive can form a solid solution with the main material in the high-temperature sintering process of the ceramic to promote the sintering of the material under a solid phase, and the grain inhibiting additive can inhibit the excessive growth of ceramic grains to ensure the performance of the final ceramic product; meanwhile, the fluxing additive is limited to be in a glass powder form, and the advantages of small particle size and good anti-settling effect of the fluxing additive can be utilized, so that the dispersion effect of the fluxing additive in a composite additive system is obviously improved, the uniformity of the effect positions of a liquid phase formed by the composite additive in the ceramic sintering process in a ceramic structure is improved, and the mechanical property and the stability of a ceramic material obtained by sintering and the reliability of the whole material are improved.
Preferably, the particle size of the composite additive is 1-5 μm. The research of the inventor finds that the particle size parameter of the composite additive is limited within the range of 1-5 mu m, so that the dispersion effect of the composite additive in the ceramic sintering process can be further improved, the defects of unstable mechanical property, high dispersion and low reliability of a finished product after ceramic sintering are further avoided, and the restriction on the application of the material is removed.
Preferably, the flux additive is CAS (CaO, Al)2O3、SiO2) Or BAS (BaO, Al)2O3、SiO2) And (3) synthesized glass powder. The fluxing additive has good promotion effect on ceramic sintering and low cost.
Preferably, the solid solution additive is TiO2、Cr2O3、Fe2O3And MnO2One or more of them.
Preferably, the grain-inhibiting additive is MgO or Y2O3And ZrO2One or more of them.
Based on the same technical concept, the invention also provides a preparation method of the composite additive in the technical scheme, which comprises the following steps:
(1) carrying out composite reaction on the raw materials of the fluxing additive at high temperature, and cooling to obtain the fluxing additive in the form of glass powder;
(2) heating, activating and ball-milling the solid solution additive to obtain first powder;
(3) performing ball milling on the grain inhibiting additive to obtain second powder;
(4) and mixing the glass powder, the first powder and the second powder, and then carrying out ball milling to obtain the composite additive for preparing the ceramic.
The design idea of the technical scheme is that the three additives are respectively treated, the fluxing additive is firstly prepared into glass powder, and then the glass powder is mixed and ball-milled with the solid solution additive after activation and ball milling and the grain inhibiting additive after ball milling, compared with the prior art that the additives are weighed and then directly mixed with the main raw materials for processing, the technical scheme can furthest ensure the dispersion effect of the three additives in the composite additive, fully play the role of the additives in the ceramic preparation process and ensure that the ceramic sintered finished product has stable material performance; in addition, the activation operation of the solid solution additive can remove impurities in the additive and improve the reactivity of the additive.
Preferably, the temperature of the composite reaction in the step (1) is 1350-1550 ℃. The research of the inventor finds that the melt obtained at the temperature is water-cooled and ball-milled to form the glass powder with small and uniform particle size and good dispersibility, and is beneficial to the dispersion of the fluxing additive in a composite additive system.
Preferably, the temperature of the activation operation in the step (2) is 800-1000 ℃, and the activation time is 0.5-1.5 h. Under the temperature and time, the impurity removal effect of the solid solution additive is the best, the performance is the most stable, and the improvement effect on the reaction activity of the additive is the best.
Preferably, the first powder and the second powder have a particle size of 1 to 15 μm. The particle size of the solid solution additive and the grain inhibiting additive in the intermediate step is limited, so that the overall particle size distribution of the final composite additive can be ensured to be uniform, the operation difficulty of ball milling in the subsequent step is reduced, and the performance stability of a finished product obtained after ceramic sintering is improved.
Compared with the prior art, the invention has the advantages that:
(1) the composite additive for preparing the ceramic can help to improve the mechanical property of a ceramic finished product obtained after sintering, and can also improve the stability and reliability of a ceramic finished product material;
(2) the composite additive for preparing ceramics of the invention replaces the prior art of directly mixing and processing various additives and raw materials by respectively processing different additives, is beneficial to improving the stability and reliability of ceramic finished materials, does not need complex instruments and equipment, and is suitable for large-scale industrialized production;
(3) when the composite additive is applied to the preparation and sintering process of the alumina ceramic, the sintering of products can be promoted and the excessive growth of crystal grains can be inhibited under the condition of lower temperature, thereby being beneficial to improving the mechanical performance of the alumina ceramic product and the stability and reliability of the whole material.
Detailed Description
The present invention will be described in further detail with reference to the accompanying tables and specific examples.
Example 1:
the composite additive for preparing the ceramic comprises the following components in parts by mass: 6 parts of fluxing additive, 3 parts of solid solution additive and 1 part of crystal inhibiting additive; wherein the fluxing additive is in the form of glass powder.
In this example, the particle size of the composite additive was 5 μm.
In this example, the fluxing additive was glass frit synthesized by CAS; the solid solution additive is TiO2(ii) a The crystal inhibiting additive is MgO.
The preparation method of the composite additive for preparing ceramic of the embodiment comprises the following steps:
(1) performing composite reaction on calcium oxide, aluminum oxide and silicon dioxide at 1500 ℃, and cooling to obtain a fluxing additive in a glass powder form;
(2) for solid solution additive TiO2Heating to 800 ℃, preserving heat and activating for 1h, and then performing ball milling to obtain first-class powder with the particle size of 15 microns;
(3) carrying out ball milling on the MgO serving as the grain inhibiting additive to obtain second powder with the grain diameter of 15 mu m;
(4) and mixing the glass powder, the first powder and the second powder, and then carrying out ball milling to obtain the composite additive for preparing the ceramic.
The composite additive and the exercise alpha-alumina powder are mixed together, subjected to ball milling, milled, molded and sintered to produce the alumina ceramic, so that the sintering of the ceramic product can be promoted, the excessive growth of crystal grains can be inhibited, and the material performance, stability and reliability of the sintered ceramic finished product can be improved.
The alumina ceramics prepared by sintering the composite additive added in the embodiment is subjected to performance test, and the results are shown in the following table 1:
TABLE 1 results of performance testing of ceramics sintered with the additive package of example 1
Figure BDA0002820091240000041
It can be seen that the composite additive of the embodiment is added in the sintering preparation process of the alumina ceramic, so that the mechanical property and the property stability of the ceramic finished product can be obviously improved.
Example 2:
the composite additive for preparing the ceramic comprises the following components in parts by mass: 5 parts of fluxing additive, 3 parts of solid solution additive and 2 parts of crystal inhibiting additive; wherein the fluxing additive is in the form of glass powder.
In this example, the particle size of the composite additive was 3 μm.
In this example, the fluxing additive is glass frit synthesized by BAS; the solid solution additive is TiO2(ii) a The crystal inhibiting additive is MgO and Y2O3
The preparation method of the composite additive for preparing ceramic of the embodiment comprises the following steps:
(1) performing composite reaction on barium oxide, aluminum oxide and silicon dioxide at 1350 ℃, and cooling to obtain a fluxing additive in a glass powder form;
(2) for solid solution additive TiO2Heating to 1000 ℃, preserving heat and activating for 0.5h, and then performing ball milling to obtain first-class powder with the particle size of 12 microns;
(3) additives MgO and Y for grain suppression2O3Ball milling to obtain second powder with particle size of 10 μm;
(4) and mixing the glass powder, the first powder and the second powder, and then carrying out ball milling to obtain the composite additive for preparing the ceramic sintering process.
The composite additive and the exercise alpha-alumina powder are mixed together, subjected to ball milling, milled, molded and sintered to produce the alumina ceramic, so that the sintering of the ceramic product can be promoted, the excessive growth of crystal grains can be inhibited, and the material performance, stability and reliability of the sintered ceramic finished product can be improved.
The performance test of the alumina ceramic prepared by sintering the composite additive added in the embodiment is as shown in the following table 2:
TABLE 2 results of performance testing of ceramics sintered with the additive package of EXAMPLE 2
Figure BDA0002820091240000051
It can be seen that the composite additive of the embodiment is added in the sintering preparation process of the alumina ceramic, so that the mechanical property and the property stability of the ceramic finished product can be obviously improved.
The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described examples. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.

Claims (10)

1. The composite additive for preparing the ceramic is characterized by comprising the following components in parts by mass: 5-7 parts of fluxing additive, 2-3 parts of solid solution additive and 1-2 parts of grain inhibiting additive; the fluxing additive is in the form of glass powder.
2. The additive package according to claim 1, wherein the particle size of the additive package is 1 to 5 μm.
3. The composite additive of claim 1 wherein the fluxing additive is a CAS or BAS synthetic glass frit.
4. The composite additive of claim 1 wherein said solid solution type additive is TiO2、Cr2O3、Fe2O3And MnO2One or more of them.
5. The additive package of claim 1 wherein said grain inhibiting additive is MgO, Y2O3And ZrO2One or more of them.
6. The method for preparing the composite additive for preparing ceramic according to claim 1, comprising the steps of:
(1) carrying out composite reaction on the raw materials of the fluxing additive at high temperature, and cooling to obtain the fluxing additive in a glass powder form;
(2) heating, activating and ball-milling the solid solution additive to obtain first powder;
(3) performing ball milling on the grain inhibiting additive to obtain second powder;
(4) and mixing the glass powder, the first powder and the second powder, and then carrying out ball milling to obtain the composite additive for preparing the ceramic.
7. The method according to claim 6, wherein the temperature of the complex reaction in the step (1) is 1350 to 1550 ℃.
8. The preparation method according to claim 6, wherein the temperature of the activation operation in the step (2) is 800-1000 ℃, and the activation time is 0.5-1.5 h.
9. The method according to claim 6, wherein the first and second powders have a particle size of 1 to 15 μm.
10. Use of the composite additive according to any one of claims 1 to 5 or the composite additive obtained by the preparation method according to any one of claims 6 to 9 as an additive in the sintering preparation process of alumina ceramics.
CN202011429005.8A 2020-12-07 2020-12-07 Composite additive for preparing ceramic and preparation method and application thereof Pending CN112430104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011429005.8A CN112430104A (en) 2020-12-07 2020-12-07 Composite additive for preparing ceramic and preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011429005.8A CN112430104A (en) 2020-12-07 2020-12-07 Composite additive for preparing ceramic and preparation method and application thereof

Publications (1)

Publication Number Publication Date
CN112430104A true CN112430104A (en) 2021-03-02

Family

ID=74691673

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011429005.8A Pending CN112430104A (en) 2020-12-07 2020-12-07 Composite additive for preparing ceramic and preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN112430104A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754414A (en) * 2021-10-29 2021-12-07 景德镇百特威尔新材料有限公司 High-density high-strength medium-aluminum/medium-high-aluminum alumina ball-milling medium and preparation method thereof
CN114890772A (en) * 2022-04-24 2022-08-12 江苏省陶瓷研究所有限公司 Yixing glaze ceramic cup and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1378993A (en) * 2002-05-17 2002-11-13 中国科学院上海硅酸盐研究所 Low-temp liquid-phase sintering of zirconium oxide toughened alumina ceramics
CN101654366A (en) * 2009-09-10 2010-02-24 中国矿业大学(北京) Composite sintering agent and method for preparing nano crystalline ceramics at low temperature
CN101962287A (en) * 2010-09-14 2011-02-02 石家庄铁道大学 Processable aluminium oxide base composite ceramic material and preparation method thereof
CN104098324A (en) * 2013-04-15 2014-10-15 成都慧成科技有限责任公司 Low-temperature sintered beta''-Al2O3 solid electrolyte and preparation method thereof
CN106673626A (en) * 2017-01-23 2017-05-17 郑州玉发精瓷科技有限公司 Low-cost alumina powder material for producing self-toughened wear-resistant alumina ceramic
CN106904950A (en) * 2017-03-21 2017-06-30 华东理工大学 A kind of low sintering 95 alumina ceramic material
CN109437890A (en) * 2018-10-12 2019-03-08 东莞市煜田新材料有限公司 A kind of zirconia ceramics sintering aid and its preparation method and application

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1378993A (en) * 2002-05-17 2002-11-13 中国科学院上海硅酸盐研究所 Low-temp liquid-phase sintering of zirconium oxide toughened alumina ceramics
CN101654366A (en) * 2009-09-10 2010-02-24 中国矿业大学(北京) Composite sintering agent and method for preparing nano crystalline ceramics at low temperature
CN101962287A (en) * 2010-09-14 2011-02-02 石家庄铁道大学 Processable aluminium oxide base composite ceramic material and preparation method thereof
CN104098324A (en) * 2013-04-15 2014-10-15 成都慧成科技有限责任公司 Low-temperature sintered beta''-Al2O3 solid electrolyte and preparation method thereof
CN106673626A (en) * 2017-01-23 2017-05-17 郑州玉发精瓷科技有限公司 Low-cost alumina powder material for producing self-toughened wear-resistant alumina ceramic
CN106904950A (en) * 2017-03-21 2017-06-30 华东理工大学 A kind of low sintering 95 alumina ceramic material
CN109437890A (en) * 2018-10-12 2019-03-08 东莞市煜田新材料有限公司 A kind of zirconia ceramics sintering aid and its preparation method and application

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
同济大学材料科学与工程学院主编: "《材料科学与工程专业实验教学指导书》", 31 December 2017, 同济大学出版社 *
朱艳: "《材料化学》", 31 October 2018, 西北工业大学出版社 *
马胜利: "《巧学初中化学70法》", 31 December 1997, 农村读物出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113754414A (en) * 2021-10-29 2021-12-07 景德镇百特威尔新材料有限公司 High-density high-strength medium-aluminum/medium-high-aluminum alumina ball-milling medium and preparation method thereof
CN114890772A (en) * 2022-04-24 2022-08-12 江苏省陶瓷研究所有限公司 Yixing glaze ceramic cup and preparation method thereof
CN114890772B (en) * 2022-04-24 2023-05-12 江苏省陶瓷研究所有限公司 Yixing glazed pottery religion cup and preparation method thereof

Similar Documents

Publication Publication Date Title
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
CN110156449B (en) High-reliability ferrite material and manufacturing method thereof
CN112430104A (en) Composite additive for preparing ceramic and preparation method and application thereof
CN112341189B (en) Temperature-stable low-dielectric-constant microwave dielectric ceramic and preparation method thereof
CN110483042B (en) Novel single-phase microwave dielectric ceramic material and preparation method thereof
CN112250424A (en) Alumina powder, alumina ceramic and preparation method thereof
CN112408969A (en) Wide-temperature-range low-power-consumption manganese-zinc ferrite material and preparation method thereof
CN107867828A (en) A kind of Al2O3The preparation method of ceramic material and its application as microwave ceramics window material
JP3737773B2 (en) Dielectric ceramic composition
CN111153694A (en) Microwave dielectric ceramic material and preparation method thereof
US11643364B2 (en) Magnesium-based raw material with low thermal conductivity and low thermal expansion and preparation method thereof
CN114031297A (en) Cordierite-based porous glass ceramic and preparation method thereof
CN116854472B (en) Microwave dielectric material and preparation method thereof
CN115784605B (en) Tantalate additive for aluminosilicate glass and preparation method and application thereof
CN108178615B (en) Microwave ceramic dielectric sintered powder material, microwave dielectric ceramic and application thereof
CN114835473B (en) Alumina ceramic and preparation method thereof
CN110862257A (en) Graphite ceramic closing resistor and preparation method thereof
CN114394819B (en) High-reliability chip NTC thermistor material and preparation method and application thereof
CN112939595B (en) Microwave dielectric ceramic material with near-zero temperature coefficient at high temperature and preparation method thereof
CN113788674B (en) Conductive ceramic and preparation method thereof
CN111423230B (en) Multiple rare earth co-doped toughened hafnium oxide ceramic material and preparation method thereof
CN108996902B (en) Low-temperature co-fired ceramic material and preparation method thereof
CN112573932A (en) Homogeneous body re-sintered fused zirconia mullite brick and preparation method thereof
CN117447202B (en) Single-phase microwave dielectric ceramic powder, microwave dielectric ceramic material and preparation method thereof
CN117326864B (en) High-resistivity high-zirconium brick 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
RJ01 Rejection of invention patent application after publication

Application publication date: 20210302

RJ01 Rejection of invention patent application after publication