CN109354494A - A kind of preparation method of high thermal conductivity zirconia composite ceramics - Google Patents

A kind of preparation method of high thermal conductivity zirconia composite ceramics Download PDF

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CN109354494A
CN109354494A CN201811074164.3A CN201811074164A CN109354494A CN 109354494 A CN109354494 A CN 109354494A CN 201811074164 A CN201811074164 A CN 201811074164A CN 109354494 A CN109354494 A CN 109354494A
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powder
thermal conductivity
high thermal
zro
preparation
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CN201811074164.3A
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Inventor
王落平
刘志远
谢庆丰
彭毅萍
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Guangdong Janus Intelligent Group Corp Ltd
Dongguan Huajing Powder Metallurgy Co Ltd
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    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/486—Fine ceramics
    • C04B35/488—Composites
    • 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
    • C04B35/803—
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5276—Whiskers, spindles, needles or pins
    • 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
    • C04B2235/6562—Heating rate
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    • 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
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    • 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
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

Abstract

The present invention relates to a kind of preparation methods of high thermal conductivity zirconia composite ceramics; the following steps are included: (1) mixing: 3Y-Zro2 powder and ALN whisker are put into according to the ratio in mixing granulator machine and are kneaded; mixing granulator compressing head is depressed, carries out being kneaded compacting powder；(2) compression moulding: powder will be suppressed by press and be filled with type chamber through pressure effect, obtain equally distributed green compact of powder etc..The invention has the advantages that guaranteeing the high-end dicoration of the high rigidity of ceramics, and the heat-sinking capability of zirconia ceramics is improved, improves ceramic mobile phone and be easy the hot problem of heating.

Description

A kind of preparation method of high thermal conductivity zirconia composite ceramics
Technical field
The present invention relates to a kind of preparation methods of high thermal conductivity zirconia composite ceramics.
Background technique
For zirconium oxide as having the texture such as jade, unshielded to signal is the ideal appearance material of 5G smart phone, but Zirconia material shortcoming: heat dissipation performance is bad, and coefficient of heat transfer is generally 2.5 or so, than metal aluminum alloy center compared to scattered Heat is too slow, and mobile phone temp is easy to cause to increase, or even scalds one's hand, and causes bad experience to using, improves leading for ceramic envelope material Hot coefficient improves its thermal conductivity, reduces interior of mobile phone temperature, and the safety and better user experience for improving mobile phone become very It is important.
Summary of the invention
To overcome the shortcomings of existing technologies, the present invention provides a kind of preparation method of high thermal conductivity zirconia composite ceramics, this The technical solution of invention is:
A kind of preparation method of high thermal conductivity zirconia composite ceramics, comprising the following steps:
(1) mixing: by 3Y-Zro2Powder and ALN whisker, which are put into according to the ratio in mixing granulator machine, to be kneaded, and pressure is kneaded It is granulated compressing head, carries out being kneaded compacting powder；
(2) compression moulding: powder will be suppressed by press and be filled with type chamber through pressure effect, obtain the equally distributed life of powder Base；
(3) HIP sintering: obtaining green product for compression moulding and be put into hot isostatic pressure stove, with 2~5 DEG C/min Heating rate is warming up to 1500 DEG C and keeps the temperature 180min, operating pressure 200MPa, realizes blank Densification, obtains finished product.
In the step (1), 3Y-Zro2The mass percent of powder and ALN whisker are as follows: 3Y-Zro270-90%, ALN Whisker ratio 10-30%, the 3Y-Zro2The diameter of partial size 0.2um, the ALN whisker of powder is 10nm.
In the step (1), 10~30 revs/min of the revolving speed of mixing granulator machine stirs 60~90min, is then made The compacting powder of partial size 1-2mm.
The invention has the advantages that guaranteeing the high-end dicoration of the high rigidity of ceramics, and improve the heat dissipation of zirconia ceramics Ability improves ceramic mobile phone and is easy the hot problem of heating.Thermal coefficient by testing composite ceramic material reaches 30-70W/ Between M.K, with traditional Zro2Material ratio, thermal coefficient improve 10 times or more, and composite ceramics are made into mobile phone center, and mobile phone dissipates Thermal effect is greatly improved, and client is made to have better experience.
Specific embodiment
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the art Member it should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form into Row modifications or substitutions, but these modifications and replacement are fallen within the protection scope of the present invention.
Embodiment 1: preparation 10kg high thermal conductivity zirconia composite ceramics powder
(1) 3Y-Zro that 9kg diameter is 0.2um is weighed2Ceramic powders are added in mixing granulator machine and are stirred, and are added 1kg diameter is the ALN whisker of 10nm, and component is put into mixing granulator machine, depresses mixing granulator compressing head, carries out mixing 60min, Revolving speed is 10 revs/min, and the compacting powder of partial size 1-2mm is then made.
(2) compacting powder is passed through into press compression moulding, pressing time 5min, pressure 3N；Powder is obtained to be uniformly distributed into With a thickness of the green sample of 2mm.
(3) compression moulding is obtained into green product and is put into hot isostatic pressure stove sintering, by with nitrogen in closed container For transmission medium, operating pressure reaches 200MPa, and control in-furnace temperature, with 2 DEG C/min of heating rate heating, directly heats up from room temperature To 1500 DEG C and warm 180min is held, under the collective effect of high temperature and pressure, each of blank is pressurized to equilibrium, and thermal coefficient reaches 31.5W/M.K。
Embodiment 2: preparation 10kg high thermal conductivity zirconia composite ceramics powder
(1) 3Y-Zro that 8kg diameter is 0.2um is weighed2Ceramic powders are added in mixing granulator machine and are stirred, and are added 2kg diameter is the ALN whisker of 10nm, and component is put into mixing granulator machine, depresses mixing granulator compressing head, carries out mixing 80min, 20 revs/min of revolving speed, the compacting powder of partial size 1.5mm is then made.
(2) compacting powder is passed through into press compression moulding, pressing time 5min, pressure 3N；Powder is obtained to be uniformly distributed into With a thickness of the green sample of 2mm.
(3) compression moulding is obtained into green product and is put into hot isostatic pressure stove sintering, by with nitrogen in closed container For transmission medium, operating pressure reaches 200MPa, and control in-furnace temperature, with 3 DEG C/min of heating rate heating, directly heats up from room temperature To 1500 DEG C and warm 180min is held, under the collective effect of high temperature and pressure, each of blank is pressurized to equilibrium, and thermal coefficient reaches 52.5W/M.K。
3,10kg high thermal conductivity zirconia composite ceramics powder is prepared
(1) 3Y-Zro that 7kg diameter is 0.2um is weighed2Ceramic powders are added in mixing granulator machine and are stirred, and are added 3kg diameter is the ALN whisker of 10nm, and component is put into mixing granulator machine, depresses mixing granulator compressing head, carries out mixing 90min, 30 revs/min of revolving speed, the compacting powder of partial size 1mm is then made.
(2) compacting powder is passed through into press compression moulding, the pressing time 5min, pressure 3N；It is uniform to obtain powder It is scattered in the green sample with a thickness of 2mm.
(3) compression moulding is obtained into green product and is put into hot isostatic pressure stove sintering, by with nitrogen in closed container For transmission medium, operating pressure reaches 200MPa, and control in-furnace temperature, with 5 DEG C/min of heating rate heating, directly heats up from room temperature To 1500 DEG C and warm 180min is held, under the collective effect of high temperature and pressure, each of blank is pressurized to equilibrium, and thermal coefficient reaches 66.5W/M.K。

Claims (3)

1. a kind of preparation method of high thermal conductivity zirconia composite ceramics, which comprises the following steps:
(1) mixing: by 3Y-Zro2Powder and ALN whisker, which are put into according to the ratio in mixing granulator machine, to be kneaded, and mixing granulator is depressed Compressing head carries out being kneaded compacting powder；
(2) compression moulding: powder will be suppressed by press and be filled with type chamber through pressure effect, obtain the equally distributed green compact of powder；
(3) HIP sintering: obtaining green product for compression moulding and be put into hot isostatic pressure stove, by closed container Nitrogen is transmission medium, is warming up to 1500 DEG C with 2~5 DEG C/min heating rate, and keep the temperature 180min, operating pressure 200MPa, It realizes blank Densification, obtains finished product.
2. a kind of preparation method of high thermal conductivity zirconia composite ceramics according to claim 1, which is characterized in that described In step (1), 3Y-Zro2The mass percent of powder and ALN whisker are as follows: 3Y-Zro270-90%, ALN whisker ratio 10- 30%, the 3Y-Zro2The diameter of partial size 0.2um, the ALN whisker of powder is 10nm.
3. a kind of preparation method of high thermal conductivity zirconia composite ceramics according to claim 1, which is characterized in that described In step (1), 10~30 revs/min of the revolving speed of mixing granulator machine stirs 60~90min, and the compacting of partial size 1-2mm is then made Powder.
CN201811074164.3A 2018-09-14 2018-09-14 A kind of preparation method of high thermal conductivity zirconia composite ceramics Pending CN109354494A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103086733A (en) * 2013-01-16 2013-05-08 汕头大学 AlN whisker/Al2O3 ceramic matrix composite plate substrate and preparation process thereof
CN105541324A (en) * 2015-12-15 2016-05-04 东莞信柏结构陶瓷股份有限公司 Preparation method of mobile telephone shell
CN106915961A (en) * 2017-02-24 2017-07-04 华南理工大学 A kind of Graphene zirconium oxide composite material and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103086733A (en) * 2013-01-16 2013-05-08 汕头大学 AlN whisker/Al2O3 ceramic matrix composite plate substrate and preparation process thereof
CN105541324A (en) * 2015-12-15 2016-05-04 东莞信柏结构陶瓷股份有限公司 Preparation method of mobile telephone shell
CN106915961A (en) * 2017-02-24 2017-07-04 华南理工大学 A kind of Graphene zirconium oxide composite material and preparation method thereof

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