Tungsten Electrode with Copper Alloy Body for Molten Salt Electrolysis
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Solution Overview
Problem
Traditional tungsten electrodes for molten salt electrolysis of rare earth metals have high mass and poor conductivity, leading to high power consumption and instability due to their high resistance and density.
Innovation Solution
A tungsten electrode design featuring an open tungsten shell with a copper alloy body and a tungsten buffer layer, where the copper alloy body is arranged inside the tungsten shell, reducing overall mass and improving conductivity, and the tungsten buffer layer prevents damage from linear expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional tungsten metal is used for the electrode, then the electrode has high density and mass, but this results in high power consumption and poor conductivity
Solution Approach 1:
The patent applies composite materials by combining tungsten shell with copper alloy body. The tungsten shell provides structural integrity and chemical stability, while the copper alloy body (with conductivity higher than pure tungsten) provides excellent electrical conductivity. This composite structure resolves the contradiction by achieving both reduced mass (compared to pure tungsten) and improved conductivity.
Solution Approach 2:
The patent applies local quality by having different materials in different parts of the electrode. The tungsten shell provides mechanical strength and chemical resistance, while the copper alloy body provides electrical conductivity. This spatial differentiation of material properties allows each region to perform its optimal function, resolving the contradiction between mass reduction and conductivity improvement.
2Loss of energy
If copper alloy body is used to reduce mass and improve conductivity, then power consumption decreases, but linear expansion during operation causes damage to the electrode structure
Solution Approach 1:
The patent applies intermediary by introducing a tungsten buffer layer between the copper alloy body and the tungsten shell. This buffer layer acts as a mediator that accommodates the linear expansion of the copper alloy body during operation, preventing direct transmission of expansion stresses to the tungsten shell and thus avoiding structural damage while maintaining the benefits of reduced power consumption.
Solution Approach 2:
The patent applies beforehand cushioning by pre-installing the tungsten buffer layer to accommodate future thermal expansion. The buffer layer is designed in advance to absorb and cushion the expansion stresses that will occur during operation, preventing structural damage before it can happen.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design results in a lighter, more conductive tungsten electrode with reduced power consumption and enhanced stability, achieving lower voltage drops and improved efficiency in molten salt electrolysis.
Implementation Method 1
the tungsten electrode has light weight and excellent conductivity, thereby reducing power consumption on the tungsten electrode
Implementation Method 2
the tungsten buffer layer prevents damage from linear expansion
Implementation Method 3
the cathode is generally made of expensive tungsten metal. On the one hand, the tungsten metal has a higher density, resulting in a high mass of traditional tungsten electrodes
Implementation Method 4
Under the effect of a direct current electric field, the rare earth cations move to the cathode, where they attain electrons and are reduced to rare earth metals
Data Source
AI summary
Provided is a tungsten electrode for molten salt electrolysis for rare earth metals preparation, including an open tungsten shell and a copper alloy body; wherein the copper alloy body is arranged inside the open tungsten shell; a tungsten buffer layer is provided between a side wall of the copper alloy body and the open tungsten shell; and a bottom of the copper alloy body is in contact with an inner bottom of the open tungsten shell.