Transition Metal Bronze Dielectric for Ozone Stabilization
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Solution Overview
Problem
Ozone concentration decreases when using high-purity oxygen as the raw material gas in discharge cells for ozonizers, especially when alumina substrates are used, due to the instability and rapid decomposition of ozone, and existing solutions like adding nitrogen or titanium oxide do not fully utilize the ozonizer's potential without additional catalysts.
Innovation Solution
Incorporating transition metal bronze, such as tungsten bronze (KWO3), with oxygen vacancies on the surface of the dielectric to stabilize ozone by absorbing excess energy, preventing decomposition and increasing ozone concentration without the need for nitrogen addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-purity oxygen is used as the raw material gas, then cleanliness and purity are improved, but ozone concentration decreases rapidly due to decomposition
Solution Approach 1:
The patent introduces transition metal bronze (containing Cu, Ag, Au, or their alloys) as an intermediary substance on the dielectric surface. This intermediary mediates between the high-purity oxygen and the dielectric, stabilizing the generated ozone and preventing its rapid decomposition, thereby maintaining high ozone concentration without requiring nitrogen addition.
Solution Approach 2:
The patent changes the chemical composition parameter of the dielectric surface by incorporating transition metal bronze. This parameter change alters the surface properties to provide ozone stabilization function, enabling high ozone concentration maintenance in high-purity oxygen environments.
2Reliability
If nitrogen gas is added to increase ozone concentration, then ozone stability is improved, but gas purity and cleanliness deteriorate
Solution Approach 1:
The transition metal bronze acts as a mediator that provides ozone stabilization without requiring nitrogen addition. It enables the system to achieve both high ozone stability and high gas purity simultaneously, resolving the trade-off between these two parameters.
3Strength
If alumina substrate is used as dielectric, then mechanical strength and ozone resistance are improved, but ozone concentration decreases due to surface impurity removal
Solution Approach 1:
The patent creates a composite structure by incorporating transition metal bronze into the alumina substrate or coating it on the surface. This composite material combines the mechanical strength and chemical stability of alumina with the ozone stabilization capability of transition metal bronze, achieving both high strength and high ozone concentration.
Solution Approach 2:
The transition metal bronze is specifically positioned on the discharge gap-facing surface of the dielectric, where ozone generation occurs. This local quality enhancement provides ozone stabilization exactly where needed, without compromising the bulk mechanical properties of the alumina substrate.
4Quantity of substance
If titanium oxide or tungsten coating is applied to dielectric surface, then ozone concentration is partially improved, but full ozonizer potential is not achieved without nitrogen
Solution Approach 1:
The patent uses transition metal bronze (Cu, Ag, Au or their alloys) as a coating or composite material on the dielectric surface. These materials provide superior ozone stabilization compared to titanium oxide or tungsten, enabling full ozonizer potential to be achieved with high-purity oxygen without nitrogen addition.
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 use of transition metal bronze effectively stabilizes ozone, increasing its concentration and maximizing ozonizer performance even with high-purity oxygen, without the need for nitrogen, by reducing the energy level of excited ozone and preventing oxidative deterioration.
Implementation Method 1
transition metal bronze...exists on the surface of the dielectric...stabilizes the ozone that is produced in the discharge gap...by having the transition metal bronze having a vacancy of oxygen exist on the surface of the dielectric to from the discharge gap. Because of this, decomposition of the produced ozone can be stopped
Implementation Method 2
ozone gas is produced by circulating a raw material gas such as oxygen in a state that a fixed high-frequency high-voltage is applied to the discharge gap and silent discharge is generated
Data Source
AI summary
To prevent the decrease of ozone concentration in the case that high purity oxygen without adding nitrogen is used as the raw material gas in a discharge type ozonizer. In an ozonizer in which a dielectric 10 is arranged contacting at least one of electrodes 30 to form a discharge gap 20 for the generation of ozone between a pair of electrodes 30, 30, a transition metal bronze containing alkaline metals alkaline earth metals or rare earth metals at position A of the transition metal oxide having a crystal structure in which an atom does not exist at position A of the perovskite structure is made to exist on the above-described surface of the dielectric 10.