SU571435A2 - Method of preparing colloidal graphite - Google Patents
Method of preparing colloidal graphiteInfo
- Publication number
- SU571435A2 SU571435A2 SU7602351356A SU2351356A SU571435A2 SU 571435 A2 SU571435 A2 SU 571435A2 SU 7602351356 A SU7602351356 A SU 7602351356A SU 2351356 A SU2351356 A SU 2351356A SU 571435 A2 SU571435 A2 SU 571435A2
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- graphite
- colloidal
- colloidal graphite
- solution
- preparing colloidal
- Prior art date
Links
Description
(54) СПОСОБ ПОЛУЧЕНИЯ КОЛЛОИДНОГО ГРАФИТА(54) METHOD FOR PRODUCING COLLOIDAL GRAPHITE
Изобретение относитс к способу изготовлени коллоидно-графитового препарата, который может найти применение в качестве печатного раствора, используемого дл получени полупровод щих обкладок сердечников конденсаторных вводов с твердой изол цией.The invention relates to a method for the manufacture of a colloidal graphite preparation, which can be used as a printing solution used to obtain semiconducting lining of the cores of solid insulation capacitor bushings.
Из естен способ получсЕнг коллоидного графита по основному авт. св. N° 332044, включающий сухой помол графита с последующей обработкой его смесью азотной, серной кислот и воды, вз тых при следующем соотнопшнии, вес тотна кислота 8-14; серна кислота 76- 82; вода .Of course, the method of colloidal graphite is obtained according to the main author. St. N ° 332044, which includes dry grinding of graphite followed by its treatment with a mixture of nitric, sulfuric acids and water, taken at the following ratio, the total acid of 8-14; sulfuric acid 76-82; water
Такое окисление обеспечивает коллоидное растворение частиц графита в кислородсодержаи1их растворител х.Such oxidation provides colloidal dissolution of graphite particles in oxygen-containing solvents.
Недостатком известного способа вл етс то, что полученный таким способом коллоидный раствор графита имеет кислую реакцию (рН 2,4-2,8), что вызывает коррозию металлических деталей аппаратуры и приводит к разрущению бумаги с пленкой из коллоидного графита при хранении и : ксплуатании конденсаторных вводов.The disadvantage of this method is that the graphite colloidal solution obtained in this way has an acidic reaction (pH 2.4-2.8), which causes corrosion of the metal parts of the apparatus and leads to the destruction of the paper with a film of colloidal graphite during storage and: inputs.
Цель изобретени - повышение прочности пленки из графита на бумаге.The purpose of the invention is to increase the strength of a graphite film on paper.
С этой целью коллоидный раствор графита нейтрализуют водным раствором аммиака до рН ,5.To this end, the colloidal solution of graphite is neutralized with an aqueous solution of ammonia to a pH of 5.
Выбор раствора аммиака дл нейтрализации обусловлен тем, что при нанесении коллоидно-графитового препарата на бумагу и его выс. пол и конденсационные прпцесси протекают с образованием полимерной токопровол щеп графитовой пленки и выделением а М М и а к а.The choice of ammonia solution for neutralization is due to the fact that when a colloidal graphite preparation is applied to the paper and its height. The floor and condensation processes proceed with the formation of a polymer tokoprovid graphite film and the release of a M M and a and a and.
проведенные эксперименты по нейтрализации коллоидного раствора графита щелочами КОН, NaOH, СА (ОН) 2 показали невозможность их применени дл этой цели всле.аствие их нелетучести, что преп тствует образованию полимерной токопровод щей графитовой пленки.The experiments on the neutralization of a colloidal solution of graphite with KOH, NaOH, CA (OH) 2 alkalis showed the impossibility of using them for this purpose because of their non-volatility, which prevents the formation of a polymeric conductive graphite film.
Пример. 1 1 л кoллo iднoгo водного раствора графита с удельной поверхностью частиц 1350 и копцентрацией 50 г/л прибавл ют 250 мл и.водного раствора аммиака. Полученный препарат имел рН 8,5. В случае применени коллоидно-графитового препарата другой дисперсности, количество аммиака необ.ходимо мен ть.Example. 1 1 liter of colloidal graphite water solution with a specific surface of particles 1350 and a concentration of 50 g / l add 250 ml of aqueous ammonia solution. The resulting preparation had a pH of 8.5. In the case of the use of a colloidal-graphite preparation of a different dispersion, the amount of ammonia must be changed.
На чертеже приводен график зависимостиThe drawing shows a graph of
количества 1 н.раствора аммиака ка рН водныхAmount of 1N ammonia solution pH of water
коллоидно-гра(|зитовых препаратов различной дисперсности (с различной удельной поверхностью частиц).Коллоидный графит, полученный по предлагаемому способу, образует при высыхании пленку с повышенной адгезией к бумаге, обладает достаточной электропроводностью, не вызывает коррозию аппаратуры и обладает более длительным сроком хранени (до I года).colloid-gra (zitovyh drugs of different dispersion (with different specific surface of the particles). Colloidal graphite, obtained by the proposed method, forms a film with increased adhesion to paper, has sufficient electrical conductivity, does not cause corrosion of equipment and has a longer shelf life ( until year I).
Предложенный способ примен етс при изготовлени конденсаторов с брлее долгим сро90The proposed method is used in the manufacture of capacitors with a long Br90.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602351356A SU571435A2 (en) | 1976-04-23 | 1976-04-23 | Method of preparing colloidal graphite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602351356A SU571435A2 (en) | 1976-04-23 | 1976-04-23 | Method of preparing colloidal graphite |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU332044 Addition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU571435A2 true SU571435A2 (en) | 1977-09-05 |
Family
ID=20658259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7602351356A SU571435A2 (en) | 1976-04-23 | 1976-04-23 | Method of preparing colloidal graphite |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU571435A2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5476580A (en) | 1993-05-17 | 1995-12-19 | Electrochemicals Inc. | Processes for preparing a non-conductive substrate for electroplating |
| US5690805A (en) | 1993-05-17 | 1997-11-25 | Electrochemicals Inc. | Direct metallization process |
| US5725807A (en) | 1993-05-17 | 1998-03-10 | Electrochemicals Inc. | Carbon containing composition for electroplating |
| US6171468B1 (en) | 1993-05-17 | 2001-01-09 | Electrochemicals Inc. | Direct metallization process |
| US6303181B1 (en) | 1993-05-17 | 2001-10-16 | Electrochemicals Inc. | Direct metallization process employing a cationic conditioner and a binder |
| US6710259B2 (en) | 1993-05-17 | 2004-03-23 | Electrochemicals, Inc. | Printed wiring boards and methods for making them |
-
1976
- 1976-04-23 SU SU7602351356A patent/SU571435A2/en active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5476580A (en) | 1993-05-17 | 1995-12-19 | Electrochemicals Inc. | Processes for preparing a non-conductive substrate for electroplating |
| US5690805A (en) | 1993-05-17 | 1997-11-25 | Electrochemicals Inc. | Direct metallization process |
| US5725807A (en) | 1993-05-17 | 1998-03-10 | Electrochemicals Inc. | Carbon containing composition for electroplating |
| US6171468B1 (en) | 1993-05-17 | 2001-01-09 | Electrochemicals Inc. | Direct metallization process |
| US6303181B1 (en) | 1993-05-17 | 2001-10-16 | Electrochemicals Inc. | Direct metallization process employing a cationic conditioner and a binder |
| US6710259B2 (en) | 1993-05-17 | 2004-03-23 | Electrochemicals, Inc. | Printed wiring boards and methods for making them |
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