Titanium Carbide Nanoparticle Electric Resistance Control
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Solution Overview
Problem
Current methods for producing titanium carbide nanoparticles do not effectively control physical properties other than particle size, limiting their application and functionality.
Innovation Solution
The method involves varying the oxygen concentration of titanium carbide nanoparticles by adjusting the amount of carbon source in the production process using a thermal plasma flame, allowing for the control of desired electric resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional production methods (baking oxidized titanium and carbon in non-oxidizing atmosphere or hydrogen atmosphere) are used, then titanium carbide nanoparticles can be produced, but the physical properties other than particle size cannot be controlled
Solution Approach 1:
The patent applies parameter changes by controlling the oxygen concentration in the reaction atmosphere during thermal plasma processing to precisely control the physical properties (such as electric resistance) of titanium carbide nanoparticles. By adjusting the oxygen concentration parameter, the invention enables production of nanoparticles with desired electrical characteristics while maintaining nanoparticle formation, thus resolving the contradiction between manufacturing precision and adaptability.
2Manufacturing precision
If particle size control methods (adding Co or Ni, controlling primary particle size) are used, then homogeneous titanium carbide powder can be obtained, but other physical properties remain uncontrollable
Solution Approach 1:
The invention introduces a new control parameter (oxygen concentration) that independently affects physical properties without interfering with particle size control. This allows simultaneous achievement of homogeneous particle size distribution and desired physical properties, resolving the contradiction between manufacturing precision and reliability.
3Manufacturing precision
If thermal plasma flame method is used with varied carbon source amount, then oxygen concentration and electric resistance can be controlled, but process complexity increases
Solution Approach 1:
The patent utilizes the thermal plasma flame method and varies the carbon source amount to control oxygen concentration and electric resistance. This approach achieves precise control of physical properties through parameter adjustment in an existing production framework, balancing manufacturing precision with acceptable process complexity.
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 approach enables the production of titanium carbide nanoparticles with specific electric resistance values, enhancing their functionality and expanding their applications.
Implementation Method 1
a production step for producing titanium carbide nanoparticles using titanium powder or titanium oxide powder, a carbon source and a thermal plasma flame
Implementation Method 2
perform reduction and carbonization in a hydrogen atmosphere at a temperature of 1,500 to 1,750° C.
Implementation Method 3
the volume resistance (electric resistance) of titanium carbide nanoparticles varies in value with the oxygen concentration thereof
Data Source
AI summary
A method for production of titanium carbide nanoparticles, the method having: a step for supplying titanium powder or titanium oxide powder into a thermal plasma flame; and a step for producing titanium carbide nanoparticles by supplying a reactive gas as a cooling gas and as a source of carbon at the downstream end of the thermal plasma flame. By varying the supplied quantity of the reactive gas, the oxygen concentration of the produced titanium carbide nanoparticles is varied. Therefore, for example, titanium carbide nanoparticles having different volume resistivity values can be produced.