CN102254652B - Preparation method of magnesia heat-conducting insulating material for electric heating tube - Google Patents
Preparation method of magnesia heat-conducting insulating material for electric heating tube Download PDFInfo
- Publication number
- CN102254652B CN102254652B CN2011100986854A CN201110098685A CN102254652B CN 102254652 B CN102254652 B CN 102254652B CN 2011100986854 A CN2011100986854 A CN 2011100986854A CN 201110098685 A CN201110098685 A CN 201110098685A CN 102254652 B CN102254652 B CN 102254652B
- Authority
- CN
- China
- Prior art keywords
- magnesia
- order
- insulating material
- electric heating
- heating tube
- 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.)
- Active
Links
Landscapes
- Catalysts (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention discloses a preparation method of a magnesia heat-conducting insulating material for an electric heating tube. The preparation method comprises the following steps: crushing electric-fused magnesia powder with purity not less than 96% into magnesia powder with different granularities of 50-60 meshes, 60-80 meshes, 80-140 meshes, 140-200 meshes, 200-325 meshes and 320 meshes; mixing sequentially according to the weight ratio of 25%, 20%, 25%, 15%, 10% and 5%; deironing; stoving, sequentially and uniformly mixing with talcum powder, active alpha-Al2O3, mullite powder and rear earth catalyst according to 100, 35, 17, 6 and 2 parts by weight in sequence so as to prepare an environment-friendly magnesia heat-conducting insulating material for the electric heating tube. The property of the electric heating tube made from the heat-conducting insulating material cannot be changed when the temperature is over 250 DEG.C, cannot produce any toxic gas and cannot pollute the environment.
Description
Technical field
The present invention relates to electrical insulating material, be specially a kind of high temperature and can not produce the preparation method of the magnesia heat-conducting insulating material for electric heating tube of toxic gas.
Background technology
Existing commercially available household appliances, as electric cooker, soy bean milk making machine, the electrothermal tube that water dispenser etc. are used, the heat-conducting insulation material adopted is for adding the magnesia powder of organic silicone oil and organic siliconresin, although its electrical property and humidity resistance can reach standard-required, but there is a very large defect, after the energising, when the temperature of electrothermal tube is raised to more than 250 ℃, macromolecular material organic silicone oil and organic siliconresin wherein can decompose gradually, original structure is destroyed, not only lose original bonding, protection against the tide and electric property, also can discharge toxic gas, surrounding environment and human body are worked the mischief.Because not finding better solution for a long time, this situation is continued into the present always.
Summary of the invention
The objective of the invention is to provide for the defect of above-mentioned prior art a kind of preparation method of magnesia heat-conducting insulating material for electric heating tube, the magnesium oxide heat-conducting insulation material that electrothermal tube is used the method to prepare, even temperature is over 250 ℃, performance can not change yet, and can not produce any toxic gas, can not pollute environment.
For achieving the above object, the present invention adopts the inorganic material that high-temperature stability is good to replace the property-modifying additive of the labile organic material of high temperature as the magnesium oxide heat-conducting insulation material.
The preparation method of magnesia heat-conducting insulating material for electric heating tube of the present invention comprises the following steps:
(1) purity is not less than to 96% 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) magnesia powder of (4) step and following inorganic matter are prepared burden by weight:
100 parts of magnesia powders, 35 parts of the talcum powder of iron-holder below 0.1%, granularity 1000 order active alpha-Al
2o
317 parts, 6 parts of granularity 200 order mullite powders, 2 parts of rare earth catalysts; Various batchings are mixed, be magnesia heat-conducting insulating material for electric heating tube.
Optional cerium oxide (the CeO of above-mentioned rare earth catalyst
2), lanthana (La
2o
3), samarium oxide (8m
2o
3) in any.
Magnesium oxide heat-conducting insulation material of the present invention, by mullite, talcum powder, active alpha-Al
2o
3the additive formed with the inorganic matter such as rare earth catalyst can generate a kind of SiO under uniform temperature, humidity, pressure around magnesium oxide particle
2-Si-O-Si-SiO
2mesh material, play good moisture-proof role to magnesia powder.The electrothermal tube humidity resistance of manufacturing with it is good; Leakage current little (0.05mA is following); In energising work, do not have any gas discharging, environmentally safe.
Embodiment
Embodiment 1
(1) get the electrically molten magnesia that purity is 96% 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) magnesia powder of (4) step and following inorganic matter are prepared burden by weight:
100 parts of magnesia powders, 35 parts of the talcum powder of iron-holder below 0.1%, granularity 1000 order active alpha-Al
2o
317 parts, 6 parts of granularity 200 order mullite powders, 3.3 parts of cerium oxide; Various batchings are mixed, obtain magnesia heat-conducting insulating material for electric heating tube.
(6) tubulature test:
By above-mentioned magnesium oxide heat-conducting insulation material pack into the test electrothermal tube in, at relative humidity 92RH, 36 ℃ of temperature, place 12 hours; Then at 80KG/cm
2the draw under pressure; Dry 2.5h again under 380 ℃; Finally 820 ℃ of sintering 20 minutes.Cooling its electrical property of rear test is as table 1:
Table 1
Humidity resistance: anti-450 ℃ of damp state; In energising work, without any gas and smog emission.
Embodiment 2
Step is identical with embodiment 1, only in (5) step, changes the rare earth catalyst cerium oxide into lanthana, and all the other are all identical.This magnesium oxide heat-conducting insulation material is tested through tubulature, and its electrical property is as table 2:
Table 2
Humidity resistance: anti-450 ℃ of damp state; In energising work, without any gas and smog emission.
Embodiment 3
Step is identical with embodiment 1, only in (5) step, changes the rare earth catalyst cerium oxide into samarium oxide, and all the other are all identical.This magnesium oxide heat-conducting insulation material is tested through tubulature, and its electrical property is as table 3:
Table 3
Humidity resistance: anti-450 ℃ of damp state; In energising work, without any gas and smog emission.
Claims (2)
1. the preparation method of a magnesia heat-conducting insulating material for electric heating tube, is characterized in that, the method comprises the following steps:
(1) purity is not less than to 96% 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) magnesia powder of (4) step and following inorganic matter are prepared burden by weight:
100 parts of magnesia powders, 35 parts of the talcum powder of iron-holder below 0.1%, granularity 1000 order active alpha-Al
2o
317 parts, 6 parts of granularity 200 order mullite powders, 2 parts of rare earth catalysts; Various batchings are mixed, be magnesia heat-conducting insulating material for electric heating tube.
2. the preparation method of magnesia heat-conducting insulating material for electric heating tube according to claim 1, is characterized in that, described step (5) middle rare earth catalyst is any in cerium oxide, lanthana, samarium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100986854A CN102254652B (en) | 2011-04-20 | 2011-04-20 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100986854A CN102254652B (en) | 2011-04-20 | 2011-04-20 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102254652A CN102254652A (en) | 2011-11-23 |
| CN102254652B true CN102254652B (en) | 2013-12-11 |
Family
ID=44981851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100986854A Active CN102254652B (en) | 2011-04-20 | 2011-04-20 | Preparation method of magnesia heat-conducting insulating material for electric heating tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102254652B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971786B (en) * | 2013-12-27 | 2017-01-25 | 上海实业振泰化工有限公司 | Electric-grade organic coating high-temperature-resistant insulating magnesia powder for electric ovens and production method of electric-grade organic coating high-temperature-resistant insulating magnesia powder |
| 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 |
| CN105869711B (en) * | 2016-06-17 | 2017-11-24 | 辽宁嘉顺化工科技有限公司 | Insulating layer material of iron pan class electric heating element and preparation method thereof |
| CN107285346B (en) * | 2017-06-28 | 2019-07-16 | 王禹成 | A kind of modification fused magnesium oxide powder and preparation method thereof to prolong the service life |
| 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 |
| CN108281217A (en) * | 2018-02-07 | 2018-07-13 | 大石桥市美尔镁制品有限公司 | A kind of magnesia powder insulating materials and preparation method thereof and a kind of flexible cable |
| CN108288528A (en) * | 2018-02-07 | 2018-07-17 | 大石桥市美尔镁制品有限公司 | A kind of magnesia powder insulating materials and a kind of flexible cable |
| CN108219508B (en) * | 2018-02-07 | 2021-03-30 | 大石桥市美尔镁制品有限公司 | Moisture-proof material and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083654A (en) * | 1993-01-07 | 1994-03-09 | 哈尔滨荣华家用电器器具厂 | High insulating anti-cementation electrothermal tube and manufacturing process thereof |
| US6236027B1 (en) * | 1999-03-26 | 2001-05-22 | Ibiden Co., Ltd. | Ceramic heater |
| CN1787699A (en) * | 2005-12-02 | 2006-06-14 | 萧鲲 | Vacuum high temp. electric heating pipe and product tech. thereof |
| CN101291553A (en) * | 2008-06-05 | 2008-10-22 | 九阳股份有限公司 | Composite electric heating tube |
| CN201298931Y (en) * | 2008-12-03 | 2009-08-26 | 江山热威金属制造有限公司 | Double-insulated electrothermal tube with double-layer bushing |
| CN101851767A (en) * | 2009-11-24 | 2010-10-06 | 中南大学 | Ceramic-base anode for molten salt electrolysis of metals and preparation and assembly method thereof |
-
2011
- 2011-04-20 CN CN2011100986854A patent/CN102254652B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1083654A (en) * | 1993-01-07 | 1994-03-09 | 哈尔滨荣华家用电器器具厂 | High insulating anti-cementation electrothermal tube and manufacturing process thereof |
| US6236027B1 (en) * | 1999-03-26 | 2001-05-22 | Ibiden Co., Ltd. | Ceramic heater |
| CN1787699A (en) * | 2005-12-02 | 2006-06-14 | 萧鲲 | Vacuum high temp. electric heating pipe and product tech. thereof |
| CN101291553A (en) * | 2008-06-05 | 2008-10-22 | 九阳股份有限公司 | Composite electric heating tube |
| CN201298931Y (en) * | 2008-12-03 | 2009-08-26 | 江山热威金属制造有限公司 | Double-insulated electrothermal tube with double-layer bushing |
| CN101851767A (en) * | 2009-11-24 | 2010-10-06 | 中南大学 | Ceramic-base anode for molten salt electrolysis of metals and preparation and assembly method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102254652A (en) | 2011-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102254652B (en) | Preparation method of magnesia heat-conducting insulating material for electric heating tube | |
| CN101901637B (en) | Composite of vegetable insulating oil and modified nano powder and application and preparation method thereof | |
| CN103035405B (en) | A kind of capacitor inserts and preparation method thereof | |
| CN102702566A (en) | Method for preparing lignocellulose aerogel by using ionic liquid | |
| CN109835927B (en) | High-temperature-resistant and high-hydrophobicity electric-grade magnesium oxide powder and preparation method thereof | |
| CN103897667A (en) | Solar heat storage material taking kaolin as supporting basal body and preparation method of solar heat storage material | |
| CN105254288A (en) | Preparation method of electric organic composite ceramic binding post | |
| CN107312603A (en) | One kind insulation nano-material modified transformer oil of extinguishing arc and preparation method thereof | |
| CN108455902B (en) | Preparation method of flame-retardant artificial stone containing nano perovskite oxide | |
| CN106366419B (en) | A kind of XLPE cable insulating materials | |
| CN106032319A (en) | Improved ceramic material | |
| CN101429013A (en) | Quaternary alumina ceramic material and method for producing the same | |
| CN104575670A (en) | Resistance paste of substrate thick film circuit and preparation method of resistance paste | |
| CN102219504A (en) | Method for synthesizing BaTiO3 conductive nano powder by one step by diffusing into gel through rare earth | |
| CN202085325U (en) | High temperature rare earth thick film circuit heating element based on aluminium alloy substrate | |
| CN109285681A (en) | High stable high reliability self-loopa three-winding autotransformer and its manufacturing method | |
| CN102637567B (en) | Cathode salt, preparation method of cathode salt, barium tungsten cathode comprising cathode salt and preparation method of barium tungsten cathode | |
| CN105489876A (en) | Production method of composite cathode material for lithium ion battery | |
| CN109836044A (en) | A kind of preparation method of the elevated-temperature seal pad with waterproofness | |
| CN103204706A (en) | Thin cream-colored kiln-transmutation glaze used for ceramic artwork decoration and preparation method thereof | |
| CN102628116B (en) | Copper-based electric contact material and preparing method thereof | |
| CN101445367B (en) | Dielectric material of AC high voltage ceramic capacitor and preparation method thereof | |
| CN107068236A (en) | A kind of breaker linear resistance material and preparation method thereof | |
| CN203932913U (en) | Fire prevention air-type bus duct | |
| CN105254289A (en) | Preparation method of electricity inorganic composite ceramic binding post |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
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 |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |