Solid non-polarized electrode resistant to deep sea pressure and preparation method thereof

A polarized electrode, solid technology, applied in the field of materials, can solve the problems of weak resistance to mechanical vibration, different environments and performances, short electrode stability period, etc., to improve deep-sea high voltage resistance, excellent electrical performance, improve The effect of electrode performance

Active Publication Date: 2019-07-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
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Problems solved by technology

[0004] The existing solid non-polarized electrodes mainly use Ag/AgCl components, but different preparation methods lead to different environments and performances.
Patent CN102169103A discloses a solid-state Ag/AgCl electrode core, its preparation method and application. The electrode core replaces the silver chloride powder with silver powder covered with silver chloride on the surface to overcome the problem of short stable period of the existing electrode, but the electrode core It is baked at 100-125°C, and the preparation temperature is too low to make the electrode reach a sintered state. The pressure of deep seawater will destroy the structure of the ele

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  • Solid non-polarized electrode resistant to deep sea pressure and preparation method thereof
  • Solid non-polarized electrode resistant to deep sea pressure and preparation method thereof
  • Solid non-polarized electrode resistant to deep sea pressure and preparation method thereof

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preparation example Construction

[0020] Please refer to figure 1 , an embodiment of the present invention provides a method for preparing a solid non-polarized electrode resistant to deep-sea pressure, comprising the following steps:

[0021] Step S1, first dissolving silver nitrate in deionized water to prepare a silver nitrate solution, then adding a small amount of ammonia water to the solution to obtain a brown precipitate, adding excess dilute ammonia water to dissolve the brown precipitate to obtain a silver ammonia solution;

[0022] Step S2, fully mixing the sodium chloride solution and the silver ammonia solution according to a mass ratio of 1:2.0 to 1:3.5 to obtain silver chloride precipitation;

[0023] In step S3, the silver chloride precipitate is repeatedly washed, freeze-dried or spray-dried to obtain nano-silver chloride powder;

[0024] Step S4, mixing the nano-silver powder and the above-mentioned silver chloride powder according to the mass ratio of 1:0.8 to 1:2.5, and then adding a binder...

Embodiment 1

[0029] Take by weighing 11.85g silver nitrate, be dissolved in deionized water, make 0.2mol / L silver nitrate solution, add ammonia solution, generate brown precipitate, continue to add excessive dilute ammonia water to make brown precipitate just dissolve, obtain silver ammonia solution; Weigh 4.08 g sodium chloride to obtain a 0.2mol / L sodium chloride solution, pour the sodium chloride solution into the silver ammonia solution, and stir rapidly to obtain a silver chloride precipitate; the silver chloride precipitate is repeatedly washed and dried by spray drying , to obtain silver chloride powder; weigh 8g silver chloride powder and 10g silver powder, add polyvinyl alcohol, fully mix, sieve, the sieve hole is 60 mesh, obtain electrode powder; electrode powder and carbon fiber grid Alternately placed in a mold, shaped under a pressure of 100MPa, and then sintered at 400°C for 1 hour under a nitrogen atmosphere to obtain a solid non-polarized electrode.

Embodiment 2

[0031] Weigh 10g of silver nitrate, dissolve it in deionized water to obtain a 0.2mol / L silver nitrate solution, add ammonia solution to form a brown precipitate, continue to add excess dilute ammonia to dissolve the brown precipitate, and obtain a silver ammonia solution; weigh 2.86g Sodium chloride, make 0.2mol / L sodium chloride solution, pour sodium chloride solution into silver ammonia solution, stir rapidly, obtain silver chloride precipitation; Silver chloride precipitation is washed repeatedly, dry with freeze-drying, Obtain silver chloride powder; weigh 5g silver chloride powder and 4g silver powder, add cellulose, fully mix, sieve, the sieve hole is 100 mesh, obtain electrode powder; place electrode powder and carbon fiber mesh alternately Molded in a mold under a pressure of 200MPa, and then sintered at 500°C for 2 hours under the protection of helium to obtain a solid non-polarized electrode.

[0032] refer to Figure 4 , which is the electrode typical range and ra...

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Abstract

The invention provides a preparation method of a solid non-polarized electrode resistant to a deep sea pressure. The preparation method of the solid non-polarized electrode resistant to the deep sea pressure comprises the following steps: preparing a silver ammonia solution by using AgNO<3> and ammonia water, and adding a NaCl solution to the silver ammonia solution to obtain a silver chloride precipitate; washing the silver chloride precipitate clean to obtain a AgCl powder after drying; mixing the AgCl powder with a nano silver powder and a binder and screening to obtain an electrode powder;and pressing the screened electrode powder under a certain pressure for molding; and in the molding process, carbon fibers woven into a grid shape are added to the electrode powder, and the molded green body is sintered under a gas atmosphere, so that the solid non-polarized electrode is obtained. The preparation method provided by the invention is simple; and the solid non-polarized electrode prepared by the preparation method provided by the invention has high mechanical strength, can withstand deep sea pressure, and has small electrode difference and stable performance, which can be used for detecting electric field signals in deep sea environment.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a deep-sea pressure-resistant solid non-polarized electrode and a preparation method thereof. Background technique [0002] Land resources are increasingly scarce, and the development and utilization of marine resources has become a research hotspot in various countries. The seabed is rich in energy resources such as oil, natural gas and combustible ice. How to accurately explore and effectively exploit these resources is the direction that people have been working hard. The ocean area accounts for about 71% of the earth's surface, and the seawater area with a depth of more than 2000 meters accounts for about 89% of the total ocean area. Therefore, it is required that the detection equipment used must be resistant to deep-sea pressure and still maintain good use when working in a deep-sea environment. performance. [0003] The solid non-polarized electrode is an important ins...

Claims

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Application Information

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IPC IPC(8): G01V3/12C01G5/02B82Y40/00B22F5/00B22F3/16B22F1/00
CPCG01V3/12C01G5/02B82Y40/00B22F5/00B22F3/16B22F1/102Y02A90/30
Inventor 徐建梅董金胡智慧黄灿
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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