CN108178623B - Microwave heating ceramic and processing technology thereof - Google Patents
Microwave heating ceramic and processing technology thereof Download PDFInfo
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- CN108178623B CN108178623B CN201810023152.1A CN201810023152A CN108178623B CN 108178623 B CN108178623 B CN 108178623B CN 201810023152 A CN201810023152 A CN 201810023152A CN 108178623 B CN108178623 B CN 108178623B
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Abstract
The invention discloses a novel microwave heating ceramic, which comprises the following components in percentage by mass: ferrite: 15% -35%; 10% -20% of silicon carbide; 10-15% of alumina porcelain powder; 2% -5% of graphite; 1% -2% of cerium oxide; 8% -20% of cordierite; 8% -20% of mullite, the invention also discloses a processing technology of the novel microwave heating ceramic, and the beneficial effects of the invention are as follows: the novel microwave heating ceramic provided by the invention has the advantages that the heating value is large, the heating maximum temperature can reach 600 ℃, the thermal shock property is better, the cracking is not easy to occur after long-time heating, the production process is simple, and the large-scale production can be carried out.
Description
Technical Field
The invention belongs to the technical field of microwave heating ceramics, and particularly relates to novel microwave heating ceramics and a processing technology thereof.
Background
The high-temperature baking ceramic heating sheet (MCH) is directly arranged at AL2O3After the resistance paste is printed on the alumina ceramic green body, the green body is baked at a high temperature of about 1600 ℃, and then is treated by an electrode and a lead wire, so that a new generation of medium-low temperature heating element is produced, which is a new substitute after an alloy heating wire and a PTC heating element, and is widely applied to various fields of daily life, industrial and agricultural technologies, communication, medical treatment, environmental protection and the like which need medium-low temperature heating. In industrial aspects such as industrial baking equipment, electric heating bonders, water and oil and acid and alkali liquid heaters and the like; in the electronic industry, such as small special crystal device constant temperature tanks; in medical treatment such as infrared physiotherapy equipment, intravenous injection heater, etc.
The microwave heating ceramic in the prior art has certain defects when being heated by a microwave oven: the heating amount is low during heating, and the heating temperature is not high; thermal shock is typical and cracking may occur upon prolonged heating.
Disclosure of Invention
The invention aims to disclose a novel microwave heating ceramic which has the advantages of large heating value, small heat conductivity coefficient, high heating temperature, better thermal shock property, difficult cracking after long-time heating, simple production process and large-scale production, and also aims to disclose a processing process of the novel microwave heating ceramic.
In order to achieve the purpose, the invention provides the following technical scheme: a novel microwave heating ceramic comprises the following components in percentage by mass:
ferrite: 15% -35%;
10% -20% of silicon carbide;
10-15% of alumina porcelain powder;
2% -5% of graphite;
1% -2% of cerium oxide;
8% -20% of cordierite;
8 to 20 percent of mullite.
The ferrite is a permanent magnetic ferrite or a soft magnetic ferrite or a gyromagnetic ferrite.
The silicon carbide is black silicon carbide.
The processing technology of the microwave heating ceramic comprises the following steps:
(1) pulverizing raw materials: mixing ferrite: 15-35 percent of silicon carbide, 10-20 percent of silicon carbide, 10-15 percent of alumina porcelain powder, 2-5 percent of graphite, 1-2 percent of cerium oxide, 8-20 percent of cordierite and 8-20 percent of mullite are added into crushing equipment for coarse crushing, medium crushing and fine crushing to prepare raw material powder;
(2) mixing and bonding: adding 18% -25% of binder into the prepared raw material powder to mix and bind the raw material powder;
(3) and (3) pressing and forming: adding the bonded raw materials into a special microwave heating ceramic mold, and pressing to form a microwave heating ceramic semi-finished product;
(4) firing and forming: the pressed semi-finished microwave heating ceramic product is transported into a sintering kiln, the temperature in the kiln is regulated and controlled at 775-825 ℃, the sintering time is regulated and controlled at 20-40 minutes, and the semi-finished microwave heating ceramic product is sintered;
(5) and (3) finished product treatment: and (3) carrying out surface polishing treatment on the sintered microwave heating ceramic finished product to ensure the surface smoothness of the microwave heating ceramic.
The adhesive in the step (2) is water glass.
Compared with the prior art, the invention has the beneficial effects that:
the novel microwave heating ceramic provided by the invention has the advantages that the heating value is large, the heating maximum temperature can reach 600 ℃, the thermal shock property is better, the cracking is not easy to occur after long-time heating, the production process is simple, and the large-scale production can be carried out.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A novel microwave heating ceramic comprises the following components in percentage by mass:
15% of ferrite;
10% of silicon carbide;
10% of alumina porcelain powder;
5% of graphite;
2% of cerium oxide;
20% of cordierite;
20% of mullite.
In this embodiment, the ferrite is soft magnetic ferrite, and the silicon carbide is black silicon carbide.
The processing technology of the microwave heating ceramic comprises the following steps:
(1) pulverizing raw materials: mixing ferrite: 15 percent of silicon carbide, 10 percent of alumina porcelain powder, 5 percent of graphite, 2 percent of cerium oxide, 20 percent of cordierite and 20 percent of mullite are added into crushing equipment for coarse crushing, intermediate crushing and fine crushing to prepare raw material powder;
(2) mixing and bonding: adding 18% of binder into the prepared raw material powder to mix and bind the raw material powder;
(3) and (3) pressing and forming: adding the bonded raw materials into a special microwave heating ceramic mold, and pressing to form a microwave heating ceramic semi-finished product;
(4) firing and forming: conveying the pressed microwave heating ceramic semi-finished product into a sintering kiln, regulating the temperature in the kiln to 800 ℃, regulating the sintering time to 30 minutes, and sintering to obtain a microwave heating ceramic finished product;
(5) and (3) finished product treatment: and (3) carrying out surface polishing treatment on the sintered microwave heating ceramic finished product to ensure the surface smoothness of the microwave heating ceramic.
The adhesive in the step (2) is water glass.
The microwave heating ceramic prepared in the embodiment has the advantages of high heating maximum temperature of 500 ℃, good thermal shock property, difficult cracking after long-time heating and general heat resistance.
Example 2
A novel microwave heating ceramic comprises the following components in percentage by mass:
30% of ferrite;
15% of silicon carbide;
15% of alumina porcelain powder;
2% of graphite;
1% of cerium oxide;
8% of cordierite;
8 percent of mullite.
In this embodiment, the ferrite is soft magnetic ferrite, and the silicon carbide is black silicon carbide.
The processing technology of the microwave heating ceramic comprises the following steps:
(1) pulverizing raw materials: adding 30% of ferrite, 15% of silicon carbide, 15% of alumina porcelain powder, 2% of graphite, 1% of cerium oxide, 8% of cordierite and 8% of mullite into crushing equipment for coarse crushing, medium crushing and fine crushing to prepare raw material powder;
(2) mixing and bonding: adding 21% of binder into the prepared raw material powder to mix and bind the raw material powder;
(3) and (3) pressing and forming: adding the bonded raw materials into a special microwave heating ceramic mold, and pressing to form a microwave heating ceramic semi-finished product;
(4) firing and forming: conveying the pressed microwave heating ceramic semi-finished product into a sintering kiln, regulating the temperature in the kiln to 800 ℃, regulating the sintering time to 30 minutes, and sintering to obtain a microwave heating ceramic finished product;
(5) and (3) finished product treatment: and (3) carrying out surface polishing treatment on the sintered microwave heating ceramic finished product to ensure the surface smoothness of the microwave heating ceramic.
The adhesive in the step (2) is water glass.
The microwave heating ceramic prepared in the embodiment has the advantages of high heating maximum temperature of 600 ℃, good thermal shock property, difficult cracking after long-time heating and good heat resistance.
Example 3
A novel microwave heating ceramic comprises the following components in percentage by mass:
20% of ferrite;
15% of silicon carbide;
10% of alumina porcelain powder;
4% of graphite;
2% of cerium oxide;
15% of cordierite;
15% of mullite.
In this embodiment, the ferrite is soft magnetic ferrite, and the silicon carbide is black silicon carbide.
The processing technology of the microwave heating ceramic comprises the following steps:
(1) pulverizing raw materials: adding 20% of ferrite, 15% of silicon carbide, 10% of alumina porcelain powder, 4% of graphite, 2% of cerium oxide, 15% of cordierite and 15% of mullite into crushing equipment for coarse crushing, medium crushing and fine crushing to prepare raw material powder;
(2) mixing and bonding: adding 19% of binder into the prepared raw material powder to mix and bind the raw material powder;
(3) and (3) pressing and forming: adding the bonded raw materials into a special microwave heating ceramic mold, and pressing to form a microwave heating ceramic semi-finished product;
(4) firing and forming: conveying the pressed microwave heating ceramic semi-finished product into a sintering kiln, regulating the temperature in the kiln to 800 ℃, regulating the sintering time to 30 minutes, and sintering to obtain a microwave heating ceramic finished product;
(5) and (3) finished product treatment: and (3) carrying out surface polishing treatment on the sintered microwave heating ceramic finished product to ensure the surface smoothness of the microwave heating ceramic.
The adhesive in the step (2) is water glass.
The microwave heating ceramic prepared in the embodiment has the advantages of heating maximum temperature of 550 ℃, good thermal shock property, difficult cracking after long-time heating and general heat resistance.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The microwave heating ceramic is characterized by comprising the following components in percentage by mass:
ferrite: 15% -35%;
10% -20% of silicon carbide;
10-15% of alumina porcelain powder;
2% -5% of graphite;
1% -2% of cerium oxide;
8% -20% of cordierite;
8 to 20 percent of mullite.
2. A microwave heating ceramic according to claim 1, wherein: the ferrite is a permanent magnetic ferrite or a soft magnetic ferrite or a gyromagnetic ferrite.
3. A microwave heating ceramic according to claim 1, wherein: the silicon carbide is black silicon carbide.
4. A process for preparing microwave heating ceramics according to any one of claims 1 to 3, which comprises the following steps:
(1) pulverizing raw materials: mixing ferrite: 15-35 percent of silicon carbide, 10-20 percent of silicon carbide, 10-15 percent of alumina porcelain powder, 2-5 percent of graphite, 1-2 percent of cerium oxide, 8-20 percent of cordierite and 8-20 percent of mullite are added into crushing equipment for coarse crushing, medium crushing and fine crushing to prepare raw material powder;
(2) mixing and bonding: adding 18% -25% of binder into the prepared raw material powder to mix and bind the raw material powder;
(3) and (3) pressing and forming: adding the bonded raw materials into a special microwave heating ceramic mold, and pressing to form a microwave heating ceramic semi-finished product;
(4) firing and forming: the pressed semi-finished microwave heating ceramic product is transported into a sintering kiln, the temperature in the kiln is regulated and controlled at 775-825 ℃, the sintering time is regulated and controlled at 20-40 minutes, and the semi-finished microwave heating ceramic product is sintered;
(5) and (3) finished product treatment: and (3) carrying out surface polishing treatment on the sintered microwave heating ceramic finished product to ensure the surface smoothness of the microwave heating ceramic.
5. The process for preparing microwave heating ceramic according to claim 4, wherein the binder in step (2) is water glass.
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| CN110057685B (en) * | 2019-03-26 | 2021-09-17 | 昆明理工大学 | Thermal fatigue testing device and testing method for heating non-combustion type cigarette heating sheet |
| CN113712284A (en) * | 2021-07-09 | 2021-11-30 | 冷水江市华生瓷业有限公司 | Thick film printing method for electronic cigarette processing |
| CN114380587A (en) * | 2022-01-19 | 2022-04-22 | 广州炻芯科技有限公司 | Formula of electrothermal ceramic material, preparation method of electrothermal ceramic blank and heating element |
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| JP2004051412A (en) * | 2002-07-19 | 2004-02-19 | Kagawa Industry Support Foundation | High-strength, electromagnetic wave absorber of ceramic and its manufacturing process |
| CN101786860A (en) * | 2010-02-02 | 2010-07-28 | 陈潮通 | Microwave heating body and method for manufacturing same |
| CN102390989A (en) * | 2011-08-09 | 2012-03-28 | 中国科学院宁波材料技术与工程研究所 | Ferrite-based ceramic composite material as well as preparation method and application thereof |
| CN102942365A (en) * | 2012-12-07 | 2013-02-27 | 俞金龙 | Production method and application of microwave-heated heat-insulating board |
| CN104341156A (en) * | 2014-10-17 | 2015-02-11 | 西安科技大学 | Silicon carbide based composite microwave-absorbing heating body composition and preparation method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004051412A (en) * | 2002-07-19 | 2004-02-19 | Kagawa Industry Support Foundation | High-strength, electromagnetic wave absorber of ceramic and its manufacturing process |
| CN101786860A (en) * | 2010-02-02 | 2010-07-28 | 陈潮通 | Microwave heating body and method for manufacturing same |
| CN102390989A (en) * | 2011-08-09 | 2012-03-28 | 中国科学院宁波材料技术与工程研究所 | Ferrite-based ceramic composite material as well as preparation method and application thereof |
| CN102942365A (en) * | 2012-12-07 | 2013-02-27 | 俞金龙 | Production method and application of microwave-heated heat-insulating board |
| CN104341156A (en) * | 2014-10-17 | 2015-02-11 | 西安科技大学 | Silicon carbide based composite microwave-absorbing heating body composition and preparation method thereof |
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