Composite Electrode Structure for High-Temperature Atomization
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Solution Overview
Problem
Common metal electrodes used in plasma heating atomization devices are prone to ablation and oxidation due to high temperatures, leading to a short service life.
Innovation Solution
The electrode is divided into two parts, with a first electrical conduction member made of metal and a second electrical conduction member made of semiconductor ceramic or metal alloy, where the second member has higher heat resistance and is located at the end for discharging, increasing the electrode's heat and ablative resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a metal conductor electrode is used for plasma heating atomization, then the electrode structure has good adaptability and processability, but the electrode is easily ablated or oxidized due to high temperature, resulting in short service life
Solution Approach 1:
The electrode adopts a composite structure consisting of a metal conductor base material and a ceramic coating layer. The metal base provides good electrical conductivity and ease of manufacture, while the ceramic coating layer provides high heat resistance and oxidation resistance. This composite material approach resolves the contradiction between ease of manufacture and reliability by combining the advantages of different materials.
Solution Approach 2:
The ceramic coating is applied specifically to the surface of the metal electrode, creating a localized protective layer where it is most needed (at the high-temperature discharge end). The metal base material retains its properties in regions where conductivity and manufacturability are prioritized. This local differentiation of material properties resolves the contradiction between ease of manufacture and heat resistance.
2Productivity
If the electrode is exposed to high-temperature arcs for atomization, then the atomization function is achieved, but the electrode undergoes ablation and oxidation, reducing its service life
Solution Approach 1:
The ceramic coating layer acts as an intermediary protective barrier between the metal electrode and the high-temperature arc environment. It absorbs and withstands the thermal and oxidative stress, protecting the metal base material from direct exposure to harmful conditions while allowing the electrode to perform its atomization function.
Solution Approach 2:
The ceramic coating is applied in advance to the metal electrode surface before the electrode is put into service. This preliminary protective action prevents ablation and oxidation from occurring during operation, thereby extending the electrode's service life while maintaining its atomization productivity.
3Reliability
If the electrode material has high heat resistance to withstand high-temperature arcs, then ablation and oxidation are prevented, but the electrical conduction performance may be reduced
Solution Approach 1:
The electrode combines a metal conductor base material with excellent electrical conductivity and a ceramic coating layer with superior heat resistance. The metal base ensures good electrical conduction performance, while the ceramic coating provides thermal protection. This composite structure resolves the contradiction between heat resistance and electrical conduction by assigning different functional requirements to different layers.
Solution Approach 2:
The ceramic coating is applied locally on the surface of the metal electrode, particularly at the discharge end where heat resistance is most critical. The metal base material maintains its electrical conduction properties throughout, ensuring good overall conductivity while the localized ceramic layer provides where needed thermal protection.
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 design enhances the electrode's resistance to high-temperature arcs, thereby extending its service life and preventing ablation and oxidation.
Implementation Method 1
a heat resistance of the second electrical conduction member is greater than a heat resistance of the first electrical conduction member
Implementation Method 2
a common metal electrode is easily ablated or oxidized due to a high temperature
Implementation Method 3
a common metal electrode is easily ablated or oxidized due to a high temperature
Data Source
AI summary
An electrode disposed in an electronic atomization device includes: a first electrical conduction member; and a second electrical conduction member, the second electrical conduction member being disposed, for discharging, at an end of the first electrical conduction member along an extending direction. A heat resistance of the second electrical conduction member is greater than a heat resistance of the first electrical conduction member.