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Inert anode and preparation method thereof

An inert anode and oxide technology, applied in the field of electrolysis, can solve problems such as low conductivity

Inactive Publication Date: 2014-03-19
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Using the method and the inert anode provided by the present invention preferably solves the technical problem of low electrical conductivity when the existing metal oxide ceramics are used as the inert anode, and the electrical conductivity is increased by about 8.4S / cm on average

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preparation example Construction

[0016] The method for preparing an inert anode according to a specific embodiment of the present invention includes the following steps: mixing the host oxide, additives, and binders to form an inert anode blank, and then sintering to obtain an inert anode; the host oxide includes nickel oxide and For iron oxide, the additive includes at least two kinds selected from manganese oxide, titanium oxide, tin oxide, zinc oxide, zirconium oxide and aluminum oxide, and the mass of the additive accounts for 0.1-1 wt% of the mass of the main oxide.

[0017] According to the preparation method of the inert anode according to the specific embodiment of the present invention, in the host oxide, the mass percent ratio of nickel oxide to iron oxide is preferably 1:0.5-2.

[0018] According to the preparation method of the inert anode in the specific embodiment of the present invention, the mass of the additive preferably accounts for 0.6-0.85 wt% of the mass of the main oxide.

[0019] Accor...

Embodiment 1

[0025] 1. Prepare raw materials:

[0026] Take main oxide, additive and binding agent by the following mass respectively: nickel oxide 1000g, iron oxide 1000g, manganese oxide 5g, titanium oxide 10g, zirconium oxide 2.5g, paraffin 50g, high-density polyethylene 50g (Lanzhou petrochemical company, Model 5000S), ethylene-vinyl acetate copolymer (Wenzhou Huate Hot Melt Adhesive Co., Ltd.) 10g, stearic acid 10g, diisooctyl phthalate 30g. Among them, the average particle size of nickel oxide and iron oxide is 1 μm (the average particle size is measured by laser particle size test method), and the average particle size of manganese oxide, titanium oxide, and zirconia is 5 μm.

[0027] 2. Mixing and granulation:

[0028] Mix all the raw materials obtained in step 1 evenly and put them into an SK-160 open twin-screw extruder at 200°C for granulation, the granulation time is 4 hours, and the screw speed is 40 rpm.

[0029] 3. Injection molding:

[0030] Put the granulated feed into ...

Embodiment 2

[0037] 1. Prepare raw materials:

[0038] Weigh the main oxides, additives and binders according to the following masses: nickel oxide 800g, iron oxide 1200g, manganese oxide 2g, zinc oxide 5g, zirconia 3g, aluminum oxide 3g, paraffin 100g, high-density polyethylene 50g, ethylene -20 g of vinyl acetate copolymer, 20 g of stearic acid, and 40 g of diisooctyl phthalate. Among them, the average particle size of nickel oxide and iron oxide is 5 μm (the average particle size is measured by laser particle size test method), and the average particle size of manganese oxide, zinc oxide, zirconia, and aluminum oxide is 1 μm.

[0039] 2. Mixing and granulation:

[0040] Mix all the raw materials obtained in step 1 evenly and put them into an SK-160 open twin-screw extruder at 250°C for granulation, the granulation time is 3 hours, and the screw speed is 30 rpm.

[0041] 3. Injection molding:

[0042] Put the granulated feed into an injection molding machine (CJ50E Zhende), control th...

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Abstract

The invention belongs to the technical field of electrolysis, in particular to the technical field of metal oxide ceramic inert anodes. The invention provides an inert anode, which comprises main oxides and additives, wherein the main oxides comprise nickel oxide and ferric oxide; and the additives are at least two of magnesium oxide, titanium oxide, tin oxide, zinc oxide, zirconium oxide and alumina, and are 0.1 to 1 percent of the weight of the main oxides. The inert anode solves the technical problem of low electric conductivity when the conventional metal oxide ceramics serve as inert anodes, and the electric conductivity is averagely improved by about 8.4S / cm. In addition, the corrosion resistance of the inert anode is also improved. Correspondingly, the invention also provides an inert anode production method.

Description

technical field [0001] The invention belongs to the field of electrolysis, in particular to an inert anode and a preparation method thereof. Background technique [0002] Inert anodes are widely used in molten salt electrolytic production of metals (such as electrolytic production of aluminum or silicon) and electrochemical research, and refer to electrodes that do not participate in electrochemical reactions during electrolysis, such as metal Pt. Metal Pt has good chemical inertness, excellent conductivity and processability, and is widely used in the research process of electrolysis. It is an ideal inert anode material, but it cannot be applied in industry due to its high price. In order to obtain cheap inert anodes, researchers have successively developed inert anode materials such as metals, cermets, carbon and metal oxide ceramics. [0003] Metal inert anode materials are mostly high-temperature oxidation-resistant alloys, most of which are based on metal Cu and Ni. Al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C7/02C25C3/00C25C3/12
Inventor 舒剑赵志强周勇翟玉清刘新阳
Owner BYD CO LTD
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