CN102254651B - Preparation method of heat-conducting insulating material for resistance wire heating disc - Google Patents
Preparation method of heat-conducting insulating material for resistance wire heating disc Download PDFInfo
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- CN102254651B CN102254651B CN201110098684XA CN201110098684A CN102254651B CN 102254651 B CN102254651 B CN 102254651B CN 201110098684X A CN201110098684X A CN 201110098684XA CN 201110098684 A CN201110098684 A CN 201110098684A CN 102254651 B CN102254651 B CN 102254651B
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Abstract
The invention discloses a preparation method of a heat-conducting insulating material for a resistance wire heating disc. The method comprises the following steps of: crushing electrically fused magnesium oxide with the purity of not less than 95 percent into magnesium oxide powder with different particle sizes of 50 to 60 meshes, 60 to 80 meshes, 80 to 140 meshes, 140 to 200 meshes, 200 to 325 meshes and 200 to 320 meshes; mixing the magnesium oxide powder with the different particle sizes according to weight ratios of 25 percent, 20 percent, 25 percent, 15 percent, 10 percent and 5 percent sequentially; deironing, drying and adding 2 to 4 percent of mullite powder or spinel powder; and finally, adding 5 to 10 percent of epoxy resin. The heat-conducting insulating material prepared by the method is made into the resistance wire heating disc, and has low induction voltage and leakage current and high using safety.
Description
Technical field
The present invention relates to electrical insulating material, be specially a kind of preparation method of heat-conducting insulating material for resistance wire heating disc.
Background technology
Owing in electromagnetic oven, microwave oven use, can producing harmful radiation, gas burner exists and leaks hidden danger, and the resistance wire heat-generating disc has use safety, neatly, the advantages such as quick heating, temperature are high, and cost performance is outstanding, make it be widely used in kitchen cooker and industrial compact heat source.
The resistance wire heat-generating disc is to place the rated resistance silk in metal dish, around resistance wire, with heat-conducting insulation material, fills, coats, and by exerting pressure, moulding, then solidifies and makes through high temperature sintering.The heat-conducting insulation material that heat-generating disc is used at present is silica and talcum powder.The heat-generating disc ubiquity induced voltage high (more than 110V) of manufacturing with this class material, leakage current large (more than 0.3mA), the poor shortcoming of safety in utilization, hang back many users.
Summary of the invention
The objective of the invention is to provide for the shortcoming of above-mentioned prior art a kind of preparation method of heat-conducting insulating material for resistance wire heating disc.The heat-conducting insulation material prepared by the method is manufactured the resistance wire heat-generating disc, can reduce induced voltage and the leakage current of heat-generating disc, improves its safety in utilization.
The preparation method of heat-conducting insulating material for resistance wire heating disc provided by the invention comprises the following steps:
(1) purity is not less than to 95% electrically molten magnesia and is pulverized, be sieved into 50-60 order, 60-80 order, 80-140 order, 140-200 order, 200-325 order and the varigrained magnesia powder of-320 order;
(2) the varigrained magnesia powder of (1) step is taken by 25%, 20%, 25%, 15%, 10% and 5% weight ratio successively, mix;
(3) magnesia powder of (2) step is carried out to deironing;
(4) magnesia powder after (3) step deironing is dried 45 minutes at 300 ℃ of temperature;
(5) add mullite powder or spinel powder in the magnesia powder after (4) step is dried, the granularity of mullite powder and spinel powder is the 100-200 order, the 2-4% that addition is magnesia powder weight, and mix;
(6) add epoxy resin in the material of (5) step, the 5-10% that addition is weight of material, mix, and is heat-conducting insulating material for resistance wire heating disc.
The resistance wire heat-generating disc that uses heat-conducting insulation material of the present invention to manufacture has the following advantages:
1, intensity is high, from the 70cm eminence, freely falls, whole excellent, without cracking;
2, induced electricity forces down, and below 80V, existing resistance wire heat-generating disc reduces nearly 30%;
3, leakage current is little, below 0.1mA, less than 1/3rd of existing resistance wire heat-generating disc;
4, room temperature resistance infinity, compressive resistance >=2500V,
5, safe and reliable.
Embodiment
Embodiment 1
Prepare according to the following steps heat-conducting insulating material for resistance wire heating disc:
(1) get the electrically molten magnesia that purity is 95% and pulverized, be sieved into 50-60 order, 60-80 order, 80-140 order, 140-200 order, 200-325 order and the varigrained magnesia powder of-320 order;
(2) above-mentioned varigrained magnesia powder is taken by 25%, 20%, 25%, 15%, 10% and 5% weight ratio successively, mix;
(3) utilize the above dry-type magnetic extractor of magnetic field intensity 18000GS that the magnesia powder of (2) step is carried out to deironing;
(4) magnesia powder after deironing is dried 45 minutes at 300 ℃ of temperature, remove moisture and fugitive constituent wherein;
(5) add mullite powder in the magnesia powder after oven dry, the mullite powder granularity is 150 orders, and addition is 3% of magnesia powder weight, mixes;
(6) add epoxy resin in the material of (5) step, addition is weight of material 7%, mixes, and makes heat-conducting insulating material for resistance wire heating disc of the present invention.
Add solvent toluene in above-mentioned heat-conducting insulation material, addition is weight of material 5%, after mixing, is filled at twice in heat-generating disc, resistance wire is coated, and through exerting pressure, moulding, then solidify through 400 ℃ of high temperature sinterings, can be made into the resistance wire heat-generating disc.
After testing, the induced voltage of this heat-generating disc is 75V; Leakage current is 0.08mA.
Embodiment 2
(1), (2), (3), (4), (6) step be identical with embodiment 1, only in (5) step, changes the additive mullite powder into spinel powder, remaining all identical.
The resistance wire heat-generating disc that utilizes this heat-conducting insulation material to manufacture, after testing, its induced voltage is 78V; Leakage current is 0.05mA.
Claims (1)
1. the preparation method of a heat-conducting insulating material for resistance wire heating disc, is characterized in that, the method comprises the following steps:
(1) purity is not less than to 95% electrically molten magnesia and is pulverized, be sieved into 50-60 order, 60-80 order, 80-140 order, 140-200 order, 200-325 order and the varigrained magnesia powder of-320 order;
(2) the varigrained magnesia powder of (1) step is taken by 25%, 20%, 25%, 15%, 10% and 5% weight ratio successively, mix;
(3) magnesia powder of (2) step is carried out to deironing;
(4) magnesia powder after (3) step deironing is dried 45 minutes at 300 ℃ of temperature;
(5) add mullite powder or spinel powder in the magnesia powder after (4) step is dried, the granularity of mullite powder and spinel powder is the 100-200 order, the 2-4% that addition is magnesia powder weight, and mix;
(6) add epoxy resin in the material of (5) step, the 5-10% that addition is weight of material, mix, and is heat-conducting insulating material for resistance wire heating disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110098684XA CN102254651B (en) | 2011-04-20 | 2011-04-20 | Preparation method of heat-conducting insulating material for resistance wire heating disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110098684XA CN102254651B (en) | 2011-04-20 | 2011-04-20 | Preparation method of heat-conducting insulating material for resistance wire heating disc |
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| Publication Number | Publication Date |
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| CN102254651A CN102254651A (en) | 2011-11-23 |
| CN102254651B true CN102254651B (en) | 2013-12-11 |
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| CN201110098684XA Active CN102254651B (en) | 2011-04-20 | 2011-04-20 | Preparation method of heat-conducting insulating material for resistance wire heating disc |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105566950B (en) * | 2015-12-07 | 2018-08-10 | 上海实业振泰化工有限公司 | A kind of manufacturing method of high voltage electrician grade high-temperature oxydation magnesium |
| CN106967309B (en) * | 2017-02-24 | 2019-01-22 | 上海实业振泰化工有限公司 | It is a kind of to stew the water aluminum pipe production method of electrician's grade magnesia powder |
| CN110012565A (en) * | 2018-01-05 | 2019-07-12 | 上海实业振泰化工有限公司 | A kind of production method of copper pipe powder |
| CN108811203A (en) * | 2018-01-05 | 2018-11-13 | 上海实业振泰化工有限公司 | A kind of fused magnesium oxide |
| CN109456737A (en) * | 2018-11-12 | 2019-03-12 | 天津航空机电有限公司 | A kind of heat filling for temperature sensor, the temperature sensor comprising it and purposes |
Citations (5)
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| CN1839182A (en) * | 2003-10-03 | 2006-09-27 | 达泰豪化学工业株式会社 | Spherical coated magnesium oxide powder and method for production thereof, and resin composition comprising the powder |
| CN101005719A (en) * | 2006-01-17 | 2007-07-25 | 宁波市塞纳电热电器有限公司 | Metal base printed circuit heater and its preparing technology |
| CN201200288Y (en) * | 2008-05-27 | 2009-03-04 | 广东浩特电器有限公司 | Energy-saving type electromagnetic electric rice pot |
| CN101466177A (en) * | 2008-12-03 | 2009-06-24 | 江山热威金属制造有限公司 | Moisture proofing method for electric heating tube oxidation magnesite powder |
| CN101500349A (en) * | 2009-01-14 | 2009-08-05 | 镇江天信电器有限公司 | Metal electric heating tube |
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2011
- 2011-04-20 CN CN201110098684XA patent/CN102254651B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1839182A (en) * | 2003-10-03 | 2006-09-27 | 达泰豪化学工业株式会社 | Spherical coated magnesium oxide powder and method for production thereof, and resin composition comprising the powder |
| CN101005719A (en) * | 2006-01-17 | 2007-07-25 | 宁波市塞纳电热电器有限公司 | Metal base printed circuit heater and its preparing technology |
| CN201200288Y (en) * | 2008-05-27 | 2009-03-04 | 广东浩特电器有限公司 | Energy-saving type electromagnetic electric rice pot |
| CN101466177A (en) * | 2008-12-03 | 2009-06-24 | 江山热威金属制造有限公司 | Moisture proofing method for electric heating tube oxidation magnesite powder |
| CN101500349A (en) * | 2009-01-14 | 2009-08-05 | 镇江天信电器有限公司 | Metal electric heating tube |
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| CN102254651A (en) | 2011-11-23 |
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| C06 | Publication | ||
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| ASS | Succession or assignment of patent right |
Owner name: DASHIQIAO MEIR MAGNESIUM PRODUCTS CO., LTD. Free format text: FORMER OWNER: JING WEI Effective date: 20120926 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20120926 Address after: 115100 Liaoning city of Dashiqiao province Shuangtaizi village Guan Tun Zhen Dashiqiao meire Magnesium Products Co. Ltd. Applicant after: Dashiqiao Meir Magnesium Products Co., Ltd. Address before: 115100, Dashiqiao, Liaoning Province town of Shuangtaizi village Dashiqiao beauty and magnesium products Co., Ltd. Applicant before: Jing Wei |
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