Vacuum Glass Panel Getter Composition for Low-Temperature Gas Adsorption
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Solution Overview
Problem
Existing glass panel units face challenges in achieving sufficient gas adsorption performance in low-pressure ranges during manufacturing at lower temperatures, particularly with zeolite-based materials, which are not adequately addressed in the prior art.
Innovation Solution
Incorporating a getter material composed of zeolite crystals with a particle size of at least 200 nm and an activable temperature below 400°C, along with a hydrogenation catalyst, to enhance gas adsorption capabilities in evacuated spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If zeolite-based material is used as gas adsorbent in conventional glass panel units, then gas adsorption capability is provided, but sufficient adsorption performance in low-pressure range cannot be achieved at lower manufacturing temperatures
Solution Approach 1:
The patent changes the particle size parameter of zeolite crystals from conventional fine particles to large particles (≥200 nm), and adjusts the activable temperature parameter to ≤400°C. This parameter optimization enables the zeolite to achieve sufficient gas adsorption performance in the low-pressure range even at lower manufacturing temperatures, resolving the contradiction between adsorption performance and temperature requirements
Solution Approach 2:
The patent creates a composite getter material system combining zeolite crystals with specific particle sizes and activable temperatures. This composite approach allows the material to maintain high gas adsorption capability while functioning effectively at reduced temperatures, addressing the limitation of conventional zeolite-based materials
2Quantity of substance
If smaller zeolite particles are used to increase surface area, then gas adsorption capacity increases, but manufacturing at lower temperatures becomes difficult
Solution Approach 1:
The patent inverts the conventional particle size approach by specifying zeolite crystals with particle sizes ≥200 nm. This counterintuitive parameter change maintains sufficient gas adsorption capacity while enabling easier manufacturing at lower temperatures, resolving the contradiction between adsorption capacity and manufacturability
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 solution enables effective gas adsorption, including nitrogen and hydrocarbons, even at lower manufacturing temperatures, maintaining thermal insulation and reducing residual gases in evacuated spaces.
Implementation Method 1
The gas adsorbent contains a getter material. The getter material contains a plurality of particles of a zeolite crystal.
Implementation Method 2
Incorporating a getter material composed of zeolite crystals with a particle size of at least 200 nm and an activable temperature below 400°C, along with a hydrogenation catalyst
Data Source
AI summary
A glass panel unit includes: a first glass pane; a second glass pane facing the first glass pane; a frame member; an evacuated space; and a gas adsorbent. The frame member hermetically bonds the first glass pane and the second glass pane. The evacuated space is surrounded with the first glass pane, the second glass pane, and the frame member. The gas adsorbent is placed in the evacuated space. The gas adsorbent contains a getter material. The getter material contains a plurality of particles of a zeolite crystal. At least one particle accounting for a half or more of a total weight of the plurality of particles has a particle size equal to or greater than 200 nm. An activable temperature of the at least one particle is equal to or lower than 400oC.