CN1246464A - Material for making ceramic insulator for high-voltage DC transmission - Google Patents
Material for making ceramic insulator for high-voltage DC transmission Download PDFInfo
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- CN1246464A CN1246464A CN 98114283 CN98114283A CN1246464A CN 1246464 A CN1246464 A CN 1246464A CN 98114283 CN98114283 CN 98114283 CN 98114283 A CN98114283 A CN 98114283A CN 1246464 A CN1246464 A CN 1246464A
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Abstract
A ceramic insulator for high-voltage DC transmission is made up of calcined bauxite (30-50%), feldspar (8-20%), alkali-earth metal salt (2-5%) and clay (40-60%). Its advantages include low cost, and high mechanical strength, electric properties and DC ageing resistance.
Description
The present invention relates to a kind of material that is used to make insulator, especially a kind of material that is used to make ceramic insulator for high-voltage DC transmission.
High voltage direct current large vol long distance powedr transmission technology, it is the another new technical field that on traditional high-voltage AC transmission technical foundation, develops, it is compared with alternating current transmission has that construction costs is low, loss is little, surrounding environment is disturbed advantages such as light, therefore, direct-current transmission is an All Around The World length apart from the transmit electric power developing direction of the energy of ultra-high voltage.Because high voltage direct current transmission, for playing the insulator of insulation, support effect, be to move under directed electric field, the ion of insulator material internal can be moved under directed electric field action, when accumulative total is moved the quantity of electric charge and reached certain value, the insulator material will lose insulating effect and be breakdown, in addition, charge effect produces static, and the easy dust suction of product surface is by filth, flash-over voltage is obviously reduced, so the special performances requirement is arranged for the material of making ceramic insulator for high-voltage DC transmission.
At present, D.C. isolation is based on stupalith basically, in stupalith, current carrier is generally the ions that appraise at the current rate such as alkalimetal ion, alkaline-earth metal ions and iron, titanium, when the ratio of two metal ion species reaches certain value, then can reduce conductivity of electrolyte materials significantly, Here it is " neutralizing effect "; When introducing the long radius ion in the material, can stop minor radius ionic directional migration, also can reduce conductivity of electrolyte materials, promptly " constrain effect ", in addition, contain impurity such as iron iron in the stupalith, certain " creep " phenomenon can take place under directed electric field, be that specific conductivity increases in time and gradually, when removing external electric field, specific conductivity is recovered initial value again.Obviously, for ceramic insulator for high-voltage DC transmission, it is very crux that the component of its manufactured materials limits.Up to the present, people are when making ceramic insulator for high-voltage DC transmission, selected stupalith is aggregate with the commercial alumina all, though the commercial alumina cost is higher, it is the stupalith of aggregate that people also do not seek a kind of cheap material with alternative commercial alumina.
The objective of the invention is to overcome the deficiency of above-mentioned prior art and provide a kind of can reduce significantly the sub-cost of D.C. isolation, rightly utilization " neutralizing effect " and " oppressive effect ", use the material of the manufacturing ceramic insulator for high-voltage DC transmission of natural mineral resource fully.
Above-mentioned purpose of the present invention realizes by following technique means.A kind of material of making ceramic insulator for high-voltage DC transmission, it consists of: calcination bauxitic clay 30～50%, feldspar 8～20%, alkaline earth salt 2～5%, clay 40～60%.
Described alkaline earth salt can be substituted by alkaline earth metal oxide.
Metal in described alkaline earth salt or the alkaline earth metal oxide can be strontium, barium, radium.
Consisting of of described clay: kaolinton 72%, many water kaolinton 10%, illite clay 17%.
Described calcination bauxitic clay is 1450～1550 ℃ of AlO content 82～90%, TiO content≤4.5%, true density 〉=3.55g/cm, calcination temperature.
Described feldspar is 1260～1340 ℃ of KO content 10～13%, NaO content 0.4～1.0%, melt temperature.
Sodium oxide content in the described clay＜1%.
The material of manufacturing ceramic insulator for high-voltage DC transmission provided by the present invention can reduce the sub-cost of D.C. isolation significantly, use " neutralizing effect " and " constraining effect " rightly, use natural mineral resource fully, strengthened the throughput of D.C. isolation, improved the performance index of product, the product sample detected result shows, its physical strength height, it is D.C. isolation that aggregate is made that good electrical property, the particularly aging property of anti-the direct current are better than with the commercial alumina.
Introduce the specific embodiment of the invention below in detail.Embodiment 1: with one ton of material is example, get 46% clay, wherein kaolinton account for clay 72%, many water kaolinton account for clay 10%, illite clay accounts for 17% of clay, calcination bauxitic clay 38%, feldspar 13%, barium carbonate or Strontium carbonate powder or radium carbonate 3%, the performance index of calcination bauxitic clay are 1450～1550 ℃ of AlO content 82～90%, TiO content≤4.5%, true density 〉=3.55g/cm, calcination temperature.Felspathic performance index are 1260～1340 ℃ of KO content 10～13%, NaO content 0.4～1.0%, melt temperature.Sodium oxide content in the clay＜1%.After material prepared, go into the ball mill ball milling, be milled to 320 mesh screen residues 0.08%～0.12%, sieve with 200 mesh sieves, deironing then makes mechanical iron level＜0.00016%, dehydration again, vacuum pugging, shaping, repaired biscuit, drying, glazing, burns till.
Embodiment 2: with one ton of material is example, get different clays 1 such as plastic index, bonding strength, drying property and be 29%, clay 2 is 5%, clay 3 is 6%, clay 4 is 5%, calcination bauxitic clay 44%, feldspar 8%, barium oxide or strontium oxide or radium oxide 3%, after material prepared, can make by the manufacturing process of embodiment 1.
Claims (7)
1. material of making ceramic insulator for high-voltage DC transmission, it consists of:
Calcination bauxitic clay 30～50%
Feldspar 8～20%
Alkaline earth salt 2～5%
Clay 40～60%
2. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 is characterized in that described alkaline earth salt can be substituted by alkaline earth metal oxide.
3. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 and 2 is characterized in that the metal in described alkaline earth salt or the alkaline earth metal oxide is strontium, barium, radium.
4. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 is characterized in that consisting of of described clay:
Kaolinton 72%
Many water kaolinton 10%
Illite clay 17%
5. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 is characterized in that described calcination bauxitic clay is 1450～1550 ℃ of AlO content 82～90%, TiO content≤4.5%, true density 〉=3.55g/cm, calcination temperature.
6. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 is characterized in that described feldspar is 1260～1340 ℃ of KO content 10～13%, NaO content 0.4～1.0%, melt temperature.
7. the material of manufacturing ceramic insulator for high-voltage DC transmission according to claim 1 is characterized in that sodium oxide content＜1% in the described clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114283 CN1246464A (en) | 1998-08-31 | 1998-08-31 | Material for making ceramic insulator for high-voltage DC transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114283 CN1246464A (en) | 1998-08-31 | 1998-08-31 | Material for making ceramic insulator for high-voltage DC transmission |
Publications (1)
| Publication Number | Publication Date |
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| CN1246464A true CN1246464A (en) | 2000-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 98114283 Pending CN1246464A (en) | 1998-08-31 | 1998-08-31 | Material for making ceramic insulator for high-voltage DC transmission |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102786289A (en) * | 2012-09-05 | 2012-11-21 | 江苏南瓷绝缘子有限公司 | High-alumina direct current porcelain insulator and preparation method thereof |
| CN111592336A (en) * | 2020-06-02 | 2020-08-28 | 苏州电瓷厂股份有限公司 | Composite mineralizer high-resistance ceramic material and application thereof |
| CN112441824A (en) * | 2020-12-11 | 2021-03-05 | 湖南兴诚电瓷电器有限公司 | Low-temperature-resistant high-voltage power transmission porcelain insulator and preparation method thereof |
| CN113968726A (en) * | 2021-11-03 | 2022-01-25 | 江苏省电力试验研究院有限公司 | Preparation method of high-strength alumina suspension insulator and porcelain insulator structure |
-
1998
- 1998-08-31 CN CN 98114283 patent/CN1246464A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102786289A (en) * | 2012-09-05 | 2012-11-21 | 江苏南瓷绝缘子有限公司 | High-alumina direct current porcelain insulator and preparation method thereof |
| CN103396098A (en) * | 2012-09-05 | 2013-11-20 | 江苏南瓷绝缘子有限公司 | High-alumina direct-current porcelain insulator as well as preparation method thereof |
| CN111592336A (en) * | 2020-06-02 | 2020-08-28 | 苏州电瓷厂股份有限公司 | Composite mineralizer high-resistance ceramic material and application thereof |
| CN112441824A (en) * | 2020-12-11 | 2021-03-05 | 湖南兴诚电瓷电器有限公司 | Low-temperature-resistant high-voltage power transmission porcelain insulator and preparation method thereof |
| CN112441824B (en) * | 2020-12-11 | 2021-06-29 | 湖南兴诚电瓷电器有限公司 | Low-temperature-resistant high-voltage power transmission porcelain insulator and preparation method thereof |
| CN113968726A (en) * | 2021-11-03 | 2022-01-25 | 江苏省电力试验研究院有限公司 | Preparation method of high-strength alumina suspension insulator and porcelain insulator structure |
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