CN107043271A - A kind of ceramic heater - Google Patents

A kind of ceramic heater Download PDF

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Publication number
CN107043271A
CN107043271A CN201710069162.4A CN201710069162A CN107043271A CN 107043271 A CN107043271 A CN 107043271A CN 201710069162 A CN201710069162 A CN 201710069162A CN 107043271 A CN107043271 A CN 107043271A
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granularity
parts
microns
graphene
nanometers
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CN107043271B (en
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王超
陆小荣
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Hunan Miaoneng Electric Appliance Co ltd
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Wuxi Institute of Arts and Technology
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    • 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
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    • C04B38/0041—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by superficial sintering or bonding of particulate matter the particulate matter having preselected particle sizes
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    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
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    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
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Abstract

A kind of ceramic heater, is made up of the raw material of following parts by weight：Granularity is 150~200 microns of Al2O3：50~65 parts；Granularity is 80~100 microns of SiO2：10~20 parts；Granularity is 50~60 microns of MgO：8~12 parts；Granularity is 30~40 microns of Si3N4：5~10 parts；Granularity is 10~20 microns of Y2O3：4~7 parts；Granularity is 500~600 nanometers of AlN：2~5 parts；Granularity is 50~200 nanometers of pretreated graphene：1~3 part.Not only heat transfer property is excellent for this ceramic heater, with insulation effect, and good thermal shock, and stable structure can be also kept in sometimes hot and sometimes cold environment.

Description

A kind of ceramic heater
Technical field
The present invention relates to can heating ceramic technical field, more particularly, to a kind of excellent ceramic heater of thermal shock resistance.
Background technology
Baoshang is the traditional nutritious food preparation method of China, is generally required using ceramic pan come Baoshang.But ceramic pan Baoshang has one disadvantage in that, if exactly adding cold water in the midway of Baoshang, may result in pot and cracks.
Often stewed soup now with electric cooker, but internal pot is metallic article, it is impossible to reach effect that ceramics are stewed soup. If making the inner bag of electric cooker of ceramic pot, there is the hidden danger easily ftractureed.Also, current electric cooker is Heating dish is set in the bottom of a pan, the heat transfer property of ceramic pan is much worse than metal pan, and its efficiency of heating surface is very low, can greatly postpone Baoshang Time.
The content of the invention
In view of the above-mentioned problems existing in the prior art, the applicant provides a kind of ceramic heater.This ceramic heater Not only heat transfer property is excellent, with insulation effect, and good thermal shock, can also keep stable in cold prominent hot environment of dashing forward Structure.
Technical scheme is as follows：
A kind of ceramic heater, is made up of the raw material of following parts by weight：
Granularity is 150~200 microns of Al2O3：50~65 parts；
Granularity is 80~100 microns of SiO2：10~20 parts；
Granularity is 50~60 microns of MgO：8~12 parts；
Granularity is 30~40 microns of Si3N4：5~10 parts；
Granularity is 10~20 microns of Y2O3：4~7 parts；
Granularity is 500~600 nanometers of AlN：2~5 parts；
Granularity is 50~200 nanometers of pretreated graphene：1~3 part；
The method of the pretreating graphite alkene is：By the ethoxy perhydro-s-triazine and graphite that quality is graphene 3~5% Alkene adds the acetone soln that concentration is 3~5wt% together, and ultrasonic disperse 50~80 minutes, are then dried in the case of stirring Into powder.
It is preferred that, the ceramic heater is made up of the raw material of following parts by weight：
Granularity is 150~200 microns of Al2O3：55 parts；
Granularity is 80~100 microns of SiO2：15 parts；
Granularity is 50~60 microns of MgO MgO：10 parts；
Granularity is 30~40 microns of Si3N4：8 parts；
Granularity is 10~20 microns of Y2O3：6 parts；
Granularity is 500~600 nanometers of AlN：4 parts；
Granularity is 50~200 nanometers of pretreated graphene：2 parts.
A kind of preparation method of ceramic heater, is comprised the following steps that：
(1) after all raw materials are mixed, the absolute ethyl alcohol that weight is these raw materials 30~40% is added, and weight is pre- The isobutyl triethoxy silane coupling agent of the 10~12% of treated graphene, inserts in planetary mills and is mixed and ground 2~3 hours；
(2) the pureed product obtained after ball milling is subjected to mist projection granulating, the method system that the material after granulation uses isostatic pressed The standby plain embryo into required shape；
(3) high temperature sintering is carried out to plain embryo, sintering temperature is 1350~1420 DEG C, and the time is kept for 90~110 minutes；
(4) room temperature and then with 10~15 DEG C per minute of speed is cooled to, is tempered after being kept for 30~40 minutes at room temperature, Kept for 30~50 minutes at 550~620 DEG C, then naturally cool to room temperature.
The present invention is beneficial to be had technical effect that：
This invention takes the method for granularity classification, make the ceramic heating body prepared that there is microcosmic porous moulding, Thermal shock resistance is very good.In general, the ceramic conductivity of heat with loose structure is very poor, but present invention adds graphite Alkene, compensate for the influence for the thermal conductivity that loose structure is brought.Due to easily reuniting when graphene is unprocessed, it is not easy to scattered equal Even, the present invention is pre-processed to graphene so that its not only favorable dispersibility, and be generally evenly distributed in ceramic plain embryo In so that the finished product heat transfer prepared is uniform, will not local heating.
The ceramic heater for preparing of the present invention is made to the shape of pot, pot body outer surface using silk-screen printing or The method of stickup sticks some circle heater strips, is put into insulation and the resistant to elevated temperatures overcoat of energy, you can make electric-heating ceramic Baoshang Pot.Sealed pot can also be made and enter horizontal high voltage Baoshang.This pot can with the environment of resistance to 0~300 DEG C of high and low temperature alternative, It is completely enough in daily life.
Embodiment
With reference to embodiment, the present invention is specifically described.
Embodiment 1
A kind of ceramic heater, is made up of the raw material of following parts by weight：Granularity is 150~200 microns of Al2O3：50 Part；Granularity is 80~100 microns of SiO2：10 parts；Granularity is 50~60 microns of MgO：8 parts；Granularity is 30~40 The Si of micron3N4：5 parts；Granularity is 10~20 microns of Y2O3：4 parts；Granularity is 500~600 nanometers of AlN：2 parts； Granularity is 50~200 nanometers of pretreated graphene：1 part；
The method of the pretreating graphite alkene is：By the ethoxy perhydro-s-triazine and graphene that quality is graphene 3% The acetone soln that concentration is 3wt% is added together, and ultrasonic disperse 50 minutes, are then dried to powder in the case of stirring.Institute The preparation method of ceramic heater is stated, is comprised the following steps that：
(1) after all raw materials are mixed, the absolute ethyl alcohol that weight is these raw materials 30% is added, and weight is pretreatment The isobutyl triethoxy silane coupling agent of the 10% of the graphene crossed, inserts in planetary mills and is mixed and ground 2 hours；
(2) the pureed product obtained after ball milling is subjected to mist projection granulating, the method system that the material after granulation uses isostatic pressed The standby plain embryo into required shape；
(3) high temperature sintering is carried out to plain embryo, sintering temperature is 1350 DEG C, and the time is kept for 110 minutes；
(4) room temperature and then with 10 DEG C per minute of speed is cooled to, is tempered after being kept for 30 minutes at room temperature, at 550 DEG C Kept for 50 minutes, then naturally cool to room temperature.
Embodiment 2
A kind of ceramic heater, is made up of the raw material of following parts by weight：Granularity is 150~200 microns of Al2O3：55 Part；Granularity is 80~100 microns of SiO2：15 parts；Granularity is 50~60 microns of MgO MgO：10 parts；Granularity is 30 ~40 microns of Si3N4：8 parts；Granularity is 10~20 microns of Y2O3：6 parts；Granularity is 500~600 nanometers of AlN：4 Part；Granularity is 50~200 nanometers of pretreated graphene：2 parts.
The method of the pretreating graphite alkene is：By the ethoxy perhydro-s-triazine and graphene that quality is graphene 4% The acetone soln that concentration is 4wt% is added together, and ultrasonic disperse 60 minutes, are then dried to powder in the case of stirring.Institute The preparation method of ceramic heater is stated, is comprised the following steps that：
(1) after all raw materials are mixed, the absolute ethyl alcohol that weight is these raw materials 35% is added, and weight is pretreatment The isobutyl triethoxy silane coupling agent of the 11% of the graphene crossed, inserts in planetary mills and is mixed and ground 2.5 hours；
(2) the pureed product obtained after ball milling is subjected to mist projection granulating, the method system that the material after granulation uses isostatic pressed The standby plain embryo into required shape；
(3) high temperature sintering is carried out to plain embryo, sintering temperature is 1400 DEG C, and the time is kept for 100 minutes；
(4) room temperature and then with 12 DEG C per minute of speed is cooled to, is tempered after being kept for 35 minutes at room temperature, at 600 DEG C Kept for 40 minutes, then naturally cool to room temperature.
Embodiment 3
A kind of ceramic heater, is made up of the raw material of following parts by weight：Granularity is 150~200 microns of Al2O3：65 Part；Granularity is 80~100 microns of SiO2：20 parts；Granularity is 50~60 microns of MgO：12 parts；Granularity is 30~40 The Si of micron3N4：10 parts；Granularity is 10~20 microns of Y2O3：7 parts；Granularity is 500~600 nanometers of AlN：5 parts； Granularity is 50~200 nanometers of pretreated graphene：3 parts；
The method of the pretreating graphite alkene is：By the ethoxy perhydro-s-triazine and graphene that quality is graphene 5% The acetone soln that concentration is 5wt% is added together, and ultrasonic disperse 50~80 minutes, are then dried to powder in the case of stirring End.The preparation method of the ceramic heater, is comprised the following steps that：
(1) after all raw materials are mixed, the absolute ethyl alcohol that weight is these raw materials 40% is added, and weight is pretreatment The isobutyl triethoxy silane coupling agent of the 12% of the graphene crossed, inserts in planetary mills and is mixed and ground 3 hours；
(2) the pureed product obtained after ball milling is subjected to mist projection granulating, the method system that the material after granulation uses isostatic pressed The standby plain embryo into required shape；
(3) high temperature sintering is carried out to plain embryo, sintering temperature is 1420 DEG C, and the time is kept for 90 minutes；
(4) room temperature and then with 15 DEG C per minute of speed is cooled to, is tempered after being kept for 40 minutes at room temperature, at 620 DEG C Kept for 30 minutes, then naturally cool to room temperature.
Test case：
The ceramic body prepared to embodiment 1~3 carries out performance test, and test result is as shown in table 1.
Table 1
Remarks：In table 1, thermal conductivity factor is tested at 25 DEG C；Thermal shock resistance is alternately surveyed at -10 DEG C~500 DEG C Examination.

Claims (3)

1. a kind of ceramic heater, it is characterised in that be made up of the raw material of following parts by weight：
Granularity is 150~200 microns of Al2O3：50~65 parts；
Granularity is 80~100 microns of SiO2：10~20 parts；
Granularity is 50~60 microns of MgO：8~12 parts；
Granularity is 30~40 microns of Si3N4：5~10 parts；
Granularity is 10~20 microns of Y2O3：4~7 parts；
Granularity is 500~600 nanometers of AlN：2~5 parts；
Granularity is 50~200 nanometers of pretreated graphene：1~3 part；
The method of the pretreating graphite alkene is：By ethoxy perhydro-s-triazine and graphene one of the quality for graphene 3~5% The acetone soln for adding that concentration is 3~5wt% is acted, ultrasonic disperse 50~80 minutes, are then dried to powder in the case of stirring End.
2. ceramic heater according to claim 1, it is characterised in that be made up of the raw material of following parts by weight：
Granularity is 150~200 microns of Al2O3：55 parts；
Granularity is 80~100 microns of SiO2：15 parts；
Granularity is 50~60 microns of MgO MgO：10 parts；
Granularity is 30~40 microns of Si3N4：8 parts；
Granularity is 10~20 microns of Y2O3：6 parts；
Granularity is 500~600 nanometers of AlN：4 parts；
Granularity is 50~200 nanometers of pretreated graphene：2 parts.
3. the preparation method of the ceramic heater described in a kind of claim 1 or 2, it is characterised in that comprise the following steps that：
(1) after all raw materials are mixed, the absolute ethyl alcohol that weight is these raw materials 30~40% is added, and weight is pretreatment The isobutyl triethoxy silane coupling agent of the 10~12% of the graphene crossed, inserts in planetary mills and is mixed and ground 2~3 Hour；
(2) the pureed product obtained after ball milling is subjected to mist projection granulating, the material after granulation is prepared into using the method for isostatic pressed The plain embryo of required shape；
(3) high temperature sintering is carried out to plain embryo, sintering temperature is 1350~1420 DEG C, and the time is kept for 90~110 minutes；
(4) room temperature and then with 10~15 DEG C per minute of speed is cooled to, is tempered after being kept for 30~40 minutes at room temperature, 550 Kept for 30~50 minutes at~620 DEG C, then naturally cool to room temperature.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112279628A (en) * 2020-11-09 2021-01-29 广东工业大学 Alumina composite ceramic and preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103194165A (en) * 2013-04-26 2013-07-10 中国电子科技集团公司第三十八研究所 Method for preparing high-heat-conductivity conductive adhesive containing graphene
CN104150885A (en) * 2014-07-17 2014-11-19 安徽省含山民生瓷业有限责任公司 Ceramic pancake turner with good heat dissipation performance and preparation process of ceramic pancake turner
CN104876611A (en) * 2015-04-09 2015-09-02 浙江泰索科技有限公司 Graphene-reinforced ceramic and preparation method thereof
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