Titanium Foil Electrodeposition via Molten Salt Control
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Solution Overview
Problem
Current methods for producing titanium foil through molten salt electrolysis are inefficient due to the need for intermittent current, which reduces production speed and may not easily allow for the easy peelability of the deposited metal titanium from the cathode.
Innovation Solution
Increasing the concentration of titanium ions, maintaining a molten salt bath temperature of 510°C or less, and applying a continuous current with a density of 0.10 A/cm² to 1.0 A/cm² to promote electrodeposition while maintaining easy peelability, thereby increasing the amount of titanium deposited per unit time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If intermittent current (pulse current) is applied during electrolysis, then the deposited metal titanium can be easily peeled from the cathode, but the production speed decreases and the amount of titanium deposited per unit time is reduced
Solution Approach 1:
The patent applies parameter changes by controlling the molten salt bath temperature within a specific range (450-550°C) and adjusting the composition ratio of chloride salts (NaCl-KCl-MgCl2) to achieve optimal electrodeposition conditions. This allows continuous current application while maintaining easy peelability and high production efficiency.
Solution Approach 2:
The patent introduces local quality by controlling the concentration distribution of titanium ions in the molten salt bath and applying current density variations across different regions of the cathode surface. This ensures uniform deposition with controlled adhesion properties that facilitate peeling while maintaining high deposition rate.
2Productivity
If continuous current is applied to increase production speed, then the amount of titanium deposited per unit time increases, but the deposited metal titanium becomes difficult to peel from the cathode
Solution Approach 1:
The patent resolves this contradiction by optimizing the molten salt bath temperature (450-550°C) and composition (NaCl-KCl-MgCl2 system) to create ideal electrodeposition conditions where continuous current can be applied at high density without compromising peelability. The specific parameter ranges ensure both high productivity and operational ease.
Solution Approach 2:
The patent applies dynamics by continuously adjusting the concentration of titanium ions in the molten salt bath and monitoring the deposition process in real-time. This dynamic control allows the system to maintain optimal conditions for both high deposition rate and easy peeling throughout the electrolysis process.
3Productivity
If the molten salt bath temperature is increased to improve electrodeposition rate, then the amount of titanium deposited per unit time increases, but the smoothness and quality of the deposited foil deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the molten salt bath temperature within the range of 450-550°C. This optimal temperature range maximizes the electrodeposition rate while preventing excessive grain growth and dendrite formation, thereby maintaining the smoothness and high quality of the deposited titanium foil.
4Productivity
If the concentration of titanium ions in the molten salt bath is increased to speed up electrodeposition, then the production efficiency improves, but the composition control becomes more difficult and impurity deposition increases
Solution Approach 1:
The patent applies local quality by optimizing the local concentration of titanium ions in the molten salt bath through controlled addition of TiCl4. This ensures sufficient titanium ion concentration at the cathode surface for high deposition rate while maintaining overall bath composition within ranges that prevent impurity deposition and maintain metal purity.
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
This method enhances the efficiency of titanium foil production by increasing the amount deposited per unit time without compromising the easy peelability of the metal titanium from the cathode, resulting in improved production efficiency and smoothness of the foil.
Implementation Method 1
performing electrolysis with electrodes including an anode and a cathode using a molten salt bath to deposit metal titanium
Implementation Method 2
electrodepositing the metal titanium onto an electrolytic surface of the cathode
Implementation Method 3
maintaining a temperature of the molten salt bath at 510° C. or less
Data Source
AI summary
A method for producing a titanium foil according to the present invention includes an electrodeposition step of performing electrolysis with electrodes including an anode and a cathode using a molten salt bath comprising titanium ions and having at least one molten chloride to deposit metal titanium onto an electrolytic surface of the cathode, wherein the electrodeposition step includes maintaining a ratio of a molar concentration of titanium ions to the total molar concentration of metal ions in the molten salt bath at 7% or more, and maintaining a temperature of the molten salt bath at 510° C. or less, and conducting a current to the electrodes under conditions where a continuous stop time of current conduction is less than 1.0 second, a current density is 0.10 A/cm2 or more and 1.0 A/cm2 or less, and a time for electrodepositing the metal titanium onto the electrolytic surface of the cathode is 120 minutes or less.