A kind of preparation method of magnesium oxide porcelain column of mineral insulated cable
A mineral insulated cable, magnesium oxide technology, applied in the field of cables, can solve the problems of unstable density, low pressing density, brittleness, etc., and achieve the effect of improving insulation resistance and withstand voltage level, ensuring electrical performance, and ensuring excellent performance.
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[0026] like figure 1 As shown, a method for producing a mineral insulated cable magnesium oxide pillar of the present application, including the following steps:
[0027] a) Weigh 80 ethnical oxide powder, 100 ethnical oxide powder, 140 ethotic oxide powder, 200 ethnamellide powder, and 325 ethnamemic powder, and particle size powder, and obtain mixed magnesium oxide powder and particle size of 325 mesh. Level with magnesium powder;
[0028] b) Adding a binder in the grade calculated magnesium powder, gave the glyph of magnesium oxide, which is polyvinyl alcohol.
[0029] c) The magnesium oxide particles were dried, and the drying treatment after the drying treatment was pressed, and the magnesium oxide porcelain billet was obtained;
[0030] d) Sintering the magnesium oxide porcelain column blank in a resistive heating furnace to obtain magnesium oxide pages.
[0031] It should be noted that in this embodiment, the magnesium oxide powder of different particles is selected, and mi...
Embodiment 1
[0050] 1) Equipped with magnesium oxide powder according to the weight ratio of the table 1:
[0051] Table 1
[0052] Destination 80 100 140 200 325 >325 weight,% 2.0 15.0 20.0 30.0 25.0 8.0
[0053] 2) Weigh a weight of the magnesium oxide powder in step 1), pour it into the funnel of the vibrating screen, open the vibrating screen containing 30 mesh sieves, keep the vibrating screen out of the exit, let the sieve The magnesium oxide powder flows smoothly into a mixer.
[0054] 3) According to the weight of magnesium oxide powder weighing in step 2, according to 2.5% ratio, polyvinyl alcohol is accurately weighed with electron balance. The polyvinyl alcohol and a distilled water having a temperature of less than 35 ° C were then placed in the dissolution, and the ratio of the two was 1:10. The steam is heated, and the polyvinyl alcohol is often stirred with a mixture of distilled water until the solution is clear, and there is no white particles.
[00...
Embodiment 2
[0062] The method of preparing the mineral insulating cable of the mineral insulated cable in this embodiment is divided by step 1), 3), 7), 9), and other steps: other steps:
[0063] At step 1) Equipped with magnesium oxide powder according to the weight ratio of Table 2, place it for use:
[0064] Table 2
[0065] Destination 80 100 140 200 325 >325 weight,% 2.0 10.0 20.0 30.0 30.0 8.0
[0066] In step 3), the polyvinyl alcohol is accurately referred to as an adhesive with electron balance in the ratio of the magnesium oxide powder. The polyvinyl alcohol and a distilled water having a temperature of less than 35 ° C were then placed in the dissolution, and the ratio of the two was 1:10. The steam is heated, and the polyvinyl alcohol is often stirred with a mixture of distilled water until the solution is clear, and there is no white particles.
[0067] In step 7), the zinc balance is used as a release agent with electron beache in the ratio of 3.0% b...
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