CN108806981B - Preparation method of capacitor impregnant - Google Patents
Preparation method of capacitor impregnant Download PDFInfo
- Publication number
- CN108806981B CN108806981B CN201810596395.4A CN201810596395A CN108806981B CN 108806981 B CN108806981 B CN 108806981B CN 201810596395 A CN201810596395 A CN 201810596395A CN 108806981 B CN108806981 B CN 108806981B
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- CN
- China
- Prior art keywords
- shale
- parts
- powder
- capacitor
- impregnant
- 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.)
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- 239000003990 capacitor Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 claims abstract description 10
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 10
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract description 10
- 229960003237 betaine Drugs 0.000 claims abstract description 10
- 239000000787 lecithin Substances 0.000 claims abstract description 10
- 229940067606 lecithin Drugs 0.000 claims abstract description 10
- 235000010445 lecithin Nutrition 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 238000001354 calcination Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 238000012986 modification Methods 0.000 claims abstract description 4
- 230000004048 modification Effects 0.000 claims abstract description 4
- 238000007873 sieving Methods 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004006 olive oil Substances 0.000 claims description 3
- 235000008390 olive oil Nutrition 0.000 claims description 3
- 239000011775 sodium fluoride Substances 0.000 claims description 3
- 235000013024 sodium fluoride Nutrition 0.000 claims description 3
- 239000003549 soybean oil Substances 0.000 claims description 3
- 235000012424 soybean oil Nutrition 0.000 claims description 3
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical compound CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
- H01G4/22—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a preparation method of a capacitor impregnant, which comprises the following steps of crushing and sieving shale by using a crusher, putting the crushed material into a high-temperature kiln, calcining, cooling, and taking out to obtain shale powder for later use; uniformly stirring betaine, lecithin and a proper amount of water to obtain a modified solution for later use; soaking the obtained shale powder into the modification liquid, stirring, taking out, washing with clear water, and drying to obtain surface-modified shale powder for later use; mixing graphite powder, calcium carbonate and appropriate amount of water, stirring, adding surface modified shale powder and other raw materials, and mixing. The capacitor impregnant prepared by the invention contains graphite powder, so that the resistivity and the self-healing performance of the impregnant can be increased, and the shale powder is modified to be better compatible with the graphite powder and calcium carbonate and to act synergistically, so that the resistivity and the high-temperature resistance of a capacitor are further improved, and the service life is prolonged.
Description
Technical Field
The invention relates to the field of capacitor impregnants, in particular to a preparation method of a capacitor impregnant.
Background
A capacitor is a component capable of storing electric charges and is one of the most commonly used electronic components. The simplest capacitor is made up of two end plates and an insulating dielectric (including air) in between. When energized, the plates become charged, creating a voltage (potential difference), but the entire capacitor is non-conductive due to the intervening insulating material. However, such a case is under the precondition that the critical voltage (breakdown voltage) of the capacitor is not exceeded.
The impregnant for the capacitor is an insulating liquid, is a main material for producing the capacitor, is used as a liquid insulating medium to fill gaps among solid media and improve the insulating strength, the performance of the structure under a high electric field determines the service life of the capacitor, and the conventional impregnant for the capacitor often causes the poor self-healing of the capacitor and the short service life.
Disclosure of Invention
The invention aims to provide a preparation method of a capacitor impregnant.
The above purpose is achieved by the following scheme:
the preparation method of the capacitor impregnant is characterized by comprising the following steps:
(1) crushing shale by a crusher, sieving the crushed shale by a sieve of 80 to 100 meshes, putting the crushed shale into a high-temperature kiln, heating the crushed shale to 800-900 ℃ at the speed of 10 to 15 ℃ per minute, calcining the crushed shale for 6 to 12 minutes, cooling the crushed shale, and taking the crushed shale out to obtain shale powder for later use;
(2) uniformly stirring betaine, lecithin and a proper amount of water to obtain a modified solution for later use;
(3) soaking the obtained shale powder into the modification liquid, stirring for 30-60 minutes, taking out, washing with clear water, and drying to obtain surface modified shale powder for later use;
(4) mixing graphite powder, calcium carbonate and appropriate amount of water, stirring, adding surface modified shale powder and other raw materials, and mixing.
The capacitor impregnant is prepared from the following raw materials in parts by weight: 10-20 parts of graphite powder, 2-4 parts of calcium carbonate, 1-2 parts of epoxidized soybean oil, 1-2 parts of azelaic acid, 0.1-0.4 part of olive oil, 1-2 parts of betaine, 2-4 parts of lecithin, 1-2 parts of phenyl dimethyl ethane, 1-2 parts of sodium fluoride and a proper amount of water.
The preparation method of the capacitor impregnant is characterized by comprising the following steps: the water added in the step (2) is 7-12 times of the total weight of the betaine and the lecithin.
The preparation method of the capacitor impregnant is characterized by comprising the following steps: the amount of the water added in the step (4) is 8-10 times of the total amount of the graphite powder and the calcium carbonate.
The preparation method of the capacitor impregnant is characterized by comprising the following steps: the drying temperature in the step (3) is 80-100 ℃.
The invention has the beneficial effects that:
the capacitor impregnant prepared by the invention contains graphite powder, so that the resistivity and the self-healing performance of the impregnant can be increased, and the shale powder is modified to be better compatible with the graphite powder and calcium carbonate and to act synergistically, so that the resistivity and the high-temperature resistance of a capacitor are further improved, and the service life is prolonged. The obtained capacitor impregnant has high temperature resistance, low temperature resistance and good stability, and the service life of a capacitor using the impregnant is prolonged.
Detailed Description
A preparation method of a capacitor impregnant comprises the following steps:
(1) crushing shale by a crusher, sieving the crushed shale by a 100-mesh sieve, putting the crushed shale into a high-temperature kiln, heating the crushed shale to 900 ℃ at a speed of 15 ℃/min, calcining the crushed shale for 10 min, cooling the crushed shale, and taking the shale out to obtain shale powder for later use;
(2) uniformly stirring betaine, lecithin and a proper amount of water to obtain a modified solution for later use; the added water is 7-12 times of the total weight of betaine and lecithin.
(3) Soaking the obtained shale powder into the modification solution, stirring for 60 minutes, taking out, washing with clear water, and drying at 95 ℃ to obtain surface modified shale powder for later use;
(4) uniformly mixing graphite powder, calcium carbonate and a proper amount of water, fully stirring, adding the surface modified shale powder and the rest raw materials, and uniformly mixing to obtain the graphite powder; the amount of the added water is 8-10 times of the total amount of the graphite powder and the calcium carbonate.
The capacitor impregnant is prepared from the following raw materials in parts by weight (kg): 15 parts of graphite powder, 4 parts of calcium carbonate, 2 parts of epoxidized soybean oil, 1 part of azelaic acid, 0.4 part of olive oil, 2 parts of betaine, 2 parts of lecithin, 2 parts of phenyl dimethylethane, 1 part of sodium fluoride and a proper amount of water.
Claims (4)
1. The preparation method of the capacitor impregnant is characterized by comprising the following steps:
(1) crushing shale by a crusher, sieving the crushed shale by a sieve of 80 to 100 meshes, putting the crushed shale into a high-temperature kiln, heating the crushed shale to 800-900 ℃ at the speed of 10 to 15 ℃ per minute, calcining the crushed shale for 6 to 12 minutes, cooling the crushed shale, and taking the crushed shale out to obtain shale powder for later use;
(2) uniformly stirring betaine, lecithin and a certain amount of water to obtain a modified solution for later use;
(3) soaking the obtained shale powder into the modification liquid, stirring for 30-60 minutes, taking out, washing with clear water, and drying to obtain surface modified shale powder for later use;
(4) uniformly mixing graphite powder, calcium carbonate and a certain amount of water, fully stirring, adding the surface modified shale powder and the rest raw materials, and uniformly mixing to obtain the graphite powder;
the capacitor impregnant comprises the following raw materials in parts by weight: 10-20 parts of graphite powder, 2-4 parts of calcium carbonate, 1-2 parts of epoxidized soybean oil, 1-2 parts of azelaic acid, 0.1-0.4 part of olive oil, 1-2 parts of betaine, 2-4 parts of lecithin, 1-2 parts of phenyl dimethyl ethane and 1-2 parts of sodium fluoride.
2. The method of claim 1, wherein the capacitor impregnant is prepared by: the water added in the step (2) is 7-12 times of the total weight of the betaine and the lecithin.
3. The method of claim 1, wherein the capacitor impregnant is prepared by: the weight of the water added in the step (4) is 8-10 times of the total weight of the graphite powder and the calcium carbonate.
4. The method of claim 1, wherein the capacitor impregnant is prepared by: the drying temperature in the step (3) is 80-100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596395.4A CN108806981B (en) | 2018-06-11 | 2018-06-11 | Preparation method of capacitor impregnant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596395.4A CN108806981B (en) | 2018-06-11 | 2018-06-11 | Preparation method of capacitor impregnant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108806981A CN108806981A (en) | 2018-11-13 |
| CN108806981B true CN108806981B (en) | 2020-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810596395.4A Active CN108806981B (en) | 2018-06-11 | 2018-06-11 | Preparation method of capacitor impregnant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108806981B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755019B (en) * | 2019-01-10 | 2020-12-04 | 阜阳颍知网络信息科技有限公司 | Low-temperature-resistant vegetable oil-based impregnant for capacitor |
| CN110544584A (en) * | 2019-09-06 | 2019-12-06 | 安徽赛福电子有限公司 | Composite impregnant for improving durability of metalized film capacitor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103013392A (en) * | 2012-11-22 | 2013-04-03 | 芜湖众力部件有限公司 | Special epoxidized cottonseed butyl oleate-containing binding agent for compositing woven fabric on surfaces of automotive upholsteries |
| CN104086806A (en) * | 2014-07-01 | 2014-10-08 | 安徽江威精密制造有限公司 | Special filler for flexure-resistant capacitor film and preparation method of special filler |
| CN102969150B (en) * | 2012-10-31 | 2016-04-13 | 安徽拓普森电池有限责任公司 | A kind of capacitor impregnant containing modification potter's clay and preparation method thereof |
| CN106683884A (en) * | 2016-12-13 | 2017-05-17 | 宁国市大荣电器有限公司 | Multi-component rapeseed oil impregnant for capacitor |
-
2018
- 2018-06-11 CN CN201810596395.4A patent/CN108806981B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969150B (en) * | 2012-10-31 | 2016-04-13 | 安徽拓普森电池有限责任公司 | A kind of capacitor impregnant containing modification potter's clay and preparation method thereof |
| CN103013392A (en) * | 2012-11-22 | 2013-04-03 | 芜湖众力部件有限公司 | Special epoxidized cottonseed butyl oleate-containing binding agent for compositing woven fabric on surfaces of automotive upholsteries |
| CN104086806A (en) * | 2014-07-01 | 2014-10-08 | 安徽江威精密制造有限公司 | Special filler for flexure-resistant capacitor film and preparation method of special filler |
| CN106683884A (en) * | 2016-12-13 | 2017-05-17 | 宁国市大荣电器有限公司 | Multi-component rapeseed oil impregnant for capacitor |
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| Publication number | Publication date |
|---|---|
| CN108806981A (en) | 2018-11-13 |
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