Palladium Membrane Ceramic Buffer Layer Bonding
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Solution Overview
Problem
Hydrogen separation membranes with palladium-based metal separation layers face reduced hydrogen permeability and bonding force due to interdiffusion with porous supports, and conventional buffer layers used to mitigate this issue often compromise bonding strength.
Innovation Solution
A hydrogen separation membrane design featuring a buffer layer made of ceramic materials, such as oxide-based ceramics (MOy or Al2Oz) formed in columnar structures, which enhances bonding force and hydrogen permeation by acting as an adhesive layer between the porous support and the palladium-based metal separation membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a buffer layer is inserted between the porous support and the metal separation membrane to prevent interdiffusion, then hydrogen permeability is improved, but bonding force between the porous support and metal separation membrane deteriorates
Solution Approach 1:
The invention uses a composite buffer layer structure combining ceramic material (for diffusion barrier) and metal material (for bonding). This composite approach allows the buffer layer to simultaneously provide diffusion prevention through its ceramic component and strong bonding through its metal component, resolving the contradiction between improving hydrogen permeability and maintaining bonding strength.
Solution Approach 2:
The buffer layer acts as an intermediary between the porous support and metal separation membrane. By using a composite material that incorporates both ceramic and metal properties, it mediates between the conflicting requirements of preventing interdiffusion (ceramic function) and ensuring strong bonding (metal function), thereby maintaining both hydrogen permeability and bonding force.
2Stability of the object's composition
If a ceramic buffer layer is used to restrain diffusion between porous support and metal separation membrane, then interdiffusion is prevented, but bonding force between the layers deteriorates
Solution Approach 1:
The buffer layer is constructed as a composite material containing both ceramic components (for diffusion barrier properties) and metal components (for bonding properties). This composite structure enables the buffer layer to simultaneously achieve stable composition by preventing interdiffusion through its ceramic phase while maintaining strong bonding through its metal phase.
Solution Approach 2:
The buffer layer exhibits local quality differentiation where different regions or phases within the buffer layer perform different functions. The ceramic portions provide diffusion prevention while the metal portions provide bonding capability, allowing the single buffer layer to satisfy both contradictory requirements through spatial differentiation of material properties.
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 ceramic buffer layer effectively restrains diffusion and ensures a strong bonding force between the porous support and the palladium-based metal separation membrane, improving hydrogen permeation rates and durability, while allowing for modularization and cost-effective mass production.
Implementation Method 1
the hydrogen permeability may be reduced due to interdiffusion therebetween. Therefore, a buffer layer made of a ceramic material should be sandwiched between the porous support and the metal separation membrane
Implementation Method 2
a palladium-based metal separation membrane formed on the buffer layer and capable of separating hydrogen
Implementation Method 3
the hydrogen separation method using the palladium-based metal separation membrane has high hydrogen permeability and excellent hydrogen separability
Data Source
AI summary
The present invention relates to a hydrogen separation membrane and to a method for manufacturing same, which is provided for restraining the diffusion of and for imparting excellent bonding characteristics between a porous support and a palladium-based metal separation membrane. The hydrogen separation membrane according to the present invention comprises: a porous support of a metal material or a ceramic material; a buffer layer formed as a plurality of columns by using a ceramic material on the porous support; and a palladium-based metal separation membrane formed on the buffer layer for separating hydrogen. In said case, the buffer layer includes an oxide-based ceramic material of either MOy (M is Ti, Zr), wherein which the composition of oxygen is 1<y<2, or Al2Oz, wherein which the composition of oxygen is 2<z<3, and may be formed as a plurality of layers.