CN106045511A - Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18 - Google Patents

Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18 Download PDF

Info

Publication number
CN106045511A
CN106045511A CN201610401661.4A CN201610401661A CN106045511A CN 106045511 A CN106045511 A CN 106045511A CN 201610401661 A CN201610401661 A CN 201610401661A CN 106045511 A CN106045511 A CN 106045511A
Authority
CN
China
Prior art keywords
ceramic
thermal conductivity
powder
preparation
thermal
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
CN201610401661.4A
Other languages
Chinese (zh)
Inventor
方维双
方亮
李纯纯
邓酩
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 CN201610401661.4A priority Critical patent/CN106045511A/en
Publication of CN106045511A publication Critical patent/CN106045511A/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
    • C04B35/495—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 vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates
    • 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
    • C04B35/62222—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic coatings
    • 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
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • 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
    • C04B2235/3293—Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]

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 Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a thermal barrier coating ceramic material Ca6SnTa4O18 with low thermal conductivity and higher thermal expansion coefficient and a preparation method of the thermal barrier coating ceramic material Ca6SnTa4O18. The preparation method comprises the following steps: (1) original powder of CaCO3, SnO2 and Ta2O5 with the purity being 99.9% by weight or higher is weighed and blended according to composition of Ca6SnTa4O18; (2) the raw materials in the step (1) are subjected to wet ball milling and mixing for 12 h, the ball milling medium is distilled water, and the materials are dried and then pre-sintered in air atmosphere at 1,500 DEG C for 6 h; (3) a binder is added to powder prepared in the step (2), compression molding is performed after granulation, and sintering is performed finally in the air atmosphere at 1,550-1,600 DEG C for 8 h, wherein the binder adopts a polyvinyl alcohol solution with the mass concentration of 5%, and the adding amount of polyvinyl alcohol is 3% of the total mass of the powder. The prepared ceramic has good sinterability and stable structure; the thermal conductivity of the ceramic is far lower than that of YSZ while the thermal expansion coefficient is far higher than that of the YSZ, and the ceramic has important application value in thermal barrier coating systems of advanced aero-engines.

Description

A kind of lower thermal conductivity pottery Ca6SnTa4O18And preparation method thereof
Technical field
The present invention relates to lower thermal conductivity ceramic material, particularly relate to for protecting advanced turbogenerator high-temperature metal portion Thermal barrier coating ceramic material of part and preparation method thereof.
Background technology
Use thermal barrier coating system (Thermal prepared by plasma spraying method or electro beam physics vapour deposition technology Barrier Coatings, is called for short TBCs), owing to advanced turbogenerator high-temperature metal parts can be protected and improve fuel-economy Property, very important in the evolution of advanced aero engine.At present, traditional yittrium oxide energy PSZ (letter Claim YSZ) thermal barrier coating, at high temperature during long service, T-Tetragonal is converted into pros and Emission in Cubic, and cooled Cheng Zhong, T-phase will further be changed into monoclinic phase.This kind of phase transformation, by the sintering shrinkage of accelerometer finishing coat, reduces heat-proof quality.This Outward, low for YSZ thermal coefficient of expansion (about 10 × 10-6 K-1) (such as nickel-based superalloy, heat is swollen with metallic matrix for the coating that causes Swollen coefficient is about 16 × 10-6 K-1One of thermal expansion mismatch between), the strongest factor being acknowledged as coating failure.
In order to overcome the shortcoming of YSZ and improve efficiency of operation further, in the urgent need to developing a kind of thermal conductivity less than YSZ's Novel hot barrier coating pottery.The selection of novel heat barrier coat material is limited by some basic demands, such as high-melting-point, under arms temperature Spend in operating temperature range without phase transformation, relatively low thermal conductivity, higher thermal coefficient of expansion, good decay resistance, resist Thermal shock performance and relatively low caking power.But, find that a kind of to meet the ceramic material required extremely difficult simultaneously.Mesh Before, many research worker using relatively low thermal conductivity, higher thermal coefficient of expansion as selecting novel thermal barrier coating ceramic material The most important condition.
Summary of the invention
It is an object of the invention to provide a kind of ceramic material with lower thermal conductivity and high thermal expansion coefficient and preparation side thereof Method.
The lower thermal conductivity of the present invention is Ca with the chemical composition of high thermal expansion coefficient pottery6SnTa4O18。
The preparation method step of this thermal barrier coating ceramic material is:
(1) be 99.9%(percentage by weight by purity) more than CaCO3、SnO2And Ta2O5Starting powder press Ca6SnTa4O18 Composition weigh dispensing.
(2) being mixed 12 hours by step (1) raw material wet ball-milling, ball-milling medium is distilled water, big at 1500 DEG C after drying Pre-burning 6 hours in gas atmosphere.
(3), after adding binding agent pelletize in the powder that step (2) prepares, re-compacted molding, finally 1550 ~ 1600 DEG C air atmosphere sinters 8 hours；Described binding agent uses mass concentration to be the poly-vinyl alcohol solution of 5%, and polyvinyl alcohol adds Amount accounts for the 3% of powder gross mass.
Advantages of the present invention: Ca6SnTa4O18Ceramic post sintering is good, Stability Analysis of Structures；When 1300 DEG C, its thermal conductivity is low arrives 1.19W.m-1.k-1, its thermal coefficient of expansion reaches 14.1 × 10-6 K-1。Ca6SnTa4O18Pottery thermal conductivity far below YSZ, and its Thermal coefficient of expansion then much larger than YSZ, has important using value in heat barrier coat material field.
Detailed description of the invention
Embodiment:
Table 1 shows and constitutes 3 specific embodiments of different sintering temperatures of the present invention and thermal conductivity when 1300 DEG C thereof and heat The coefficient of expansion.Its preparation method is as it has been described above, test its thermal conductivity and thermal coefficient of expansion respectively by laser pulse method and push rod method. Result shows, the Ca of synthesis6SnTa4O18Thermal conductivity during 1300 DEG C of pottery is far below YSZ (3.0W.m-1.k-1), and its heat is swollen Swollen coefficient then much larger than YSZ, is expected to become novel heat barrier coat material, can meet advanced aero engine thermal barrier coating system skill Art needs.
Table 1:

Claims (1)

1. a lower thermal conductivity and high expansion coefficient pottery, it is characterised in that the chemical composition of described pottery is: Ca6SnTa4O18；
Described lower thermal conductivity concretely comprises the following steps with the preparation method of high expansion coefficient pottery:
(1) be 99.9%(percentage by weight by purity) more than CaCO3、SnO2And Ta2O5Starting powder press Ca6SnTa4O18 Composition weigh dispensing；
(2) being mixed 12 hours by step (1) raw material wet ball-milling, ball-milling medium is distilled water, at 1500 DEG C of air gas after drying Pre-burning 6 hours in atmosphere；
(3) after adding binding agent pelletize in the powder that step (2) prepares, re-compacted molding is finally big at 1550 ~ 1600 DEG C Gas atmosphere sinters 8 hours；Described binding agent uses mass concentration to be the poly-vinyl alcohol solution of 5%, and polyvinyl alcohol addition accounts for The 3% of powder gross mass.
CN201610401661.4A 2016-06-11 2016-06-11 Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18 Pending CN106045511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610401661.4A CN106045511A (en) 2016-06-11 2016-06-11 Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610401661.4A CN106045511A (en) 2016-06-11 2016-06-11 Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18

Publications (1)

Publication Number Publication Date
CN106045511A true CN106045511A (en) 2016-10-26

Family

ID=57170574

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610401661.4A Pending CN106045511A (en) 2016-06-11 2016-06-11 Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18

Country Status (1)

Country Link
CN (1) CN106045511A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014580A2 (en) * 2000-08-17 2002-02-21 Siemens Westinghouse Power Corporation Thermal barrier coating having high phase stability
CN1764613A (en) * 2003-03-26 2006-04-26 三菱重工业株式会社 Material for thermal barrier coating
CN1966462A (en) * 2006-11-24 2007-05-23 北京航空航天大学 Laminated perovskite structure heat-barrier coating ceramic layer material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002014580A2 (en) * 2000-08-17 2002-02-21 Siemens Westinghouse Power Corporation Thermal barrier coating having high phase stability
CN1764613A (en) * 2003-03-26 2006-04-26 三菱重工业株式会社 Material for thermal barrier coating
CN1966462A (en) * 2006-11-24 2007-05-23 北京航空航天大学 Laminated perovskite structure heat-barrier coating ceramic layer material

Similar Documents

Publication Publication Date Title
Bansal et al. Effects of doping on thermal conductivity of pyrochlore oxides for advanced thermal barrier coatings
CN113816751B (en) Tetragonal phase high-entropy thermal barrier coating material and preparation method thereof
CN102070335B (en) Pyrochlore structural rare-earth zirconate material and preparation method and application thereof
CN106045507A (en) Thermal-barrier-coating ceramics Ca3Sn4Ta4O21 and preparation method therefor
CN102659403A (en) Ceramic material for high-temperature-resistant thermal barrier coating and preparation method thereof
CN104891990A (en) Thermal barrier coating material of eutectic structure and method for manufacturing thermal spraying powder particles by utilizing material
US20150259251A1 (en) Thermal barrier coating material with enhanced toughness
CN106967953A (en) A kind of luminous thermal barrier coating system of the rare earth niobates based on defect fluorite structure and preparation method thereof
CN112250440B (en) Method for preparing low-thermal-conductivity high-temperature thermal-barrier ceramic CaWTa2O9 by solid-phase method
Cheng et al. Sintering mechanisms of Yttria with different additives
CN114349502A (en) Titanium-doped lanthanum hafnate ceramic for low-thermal-expansion thermal/environmental barrier coating and preparation method thereof
CN116082039A (en) Preparation method of non-equivalent ion doped high-emissivity low-thermal-conductivity functional composite ceramic or coating
CN106045510A (en) Ceramic Ca6ZrTa4O18 with low thermal conductivity and preparation method of ceramic Ca6ZrTa4O18
CN106083042A (en) A kind of lower thermal conductivity pottery Sr6zrTa4o18and preparation method thereof
CN105859287A (en) Low-heat-conductivity ceramic Sr6SnTa4O18 and preparation method thereof
CN106045511A (en) Ceramic Ca6SnTa4O18 with low thermal conductivity and preparation method of ceramic Ca6SnTa4O18
CN106007715A (en) Low thermal conductivity ceramic BaLa4Zr4O15 and preparation method thereof
CN106495487B (en) A kind of low temperature sealing glass and its preparation and application containing Ce
CN106045512A (en) Ceramic Sr6ZrNb4O18 with low thermal conductivity and preparation method of ceramic Sr6ZrNb4O18
CN106083041A (en) A kind of lower thermal conductivity pottery Mg6zrTa4o18and preparation method thereof
CN105859288A (en) Low-heat-conductivity ceramic Mg6SnTa4O18 and preparation method thereof
CN105859286A (en) Ceramic Ba3Zr4Ta4O21 with low heat conductivity and preparation method thereof
CN106477894B (en) A kind of low temperature sealing glass and its preparation and application containing Fe
Moskal et al. Characterization of thermal properties of micro-sized ceramic powders for APS deposition of ceramic layers
CN116393703A (en) Preparation method of oxide-based metal ceramic electric heating material

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20161026

RJ01 Rejection of invention patent application after publication