A hydrogen-sensitive material, a method for preparing the same and a hydrogen leakage detection application

CN122357992APending Publication Date: 2026-07-10SUZHOU JIUANTONG HYDROGEN ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU JIUANTONG HYDROGEN ENERGY TECH CO LTD
Filing Date
2026-05-09
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing palladium alloy hydrogen-sensitive materials are expensive and scarce, have insufficient stability in detecting low-concentration hydrogen, and the high-temperature and high-pressure molding process damages hydrogen storage performance, resulting in low detection accuracy and making it difficult to meet the needs of early warning of trace leaks.

Method used

Using Ti-Ni and Zr-Co hydrogen storage alloys as the matrix, and combining specific forming processes such as discharge plasma sintering or hot molding, bulk hydrogen-sensitive materials are prepared. When the material absorbs hydrogen, it simultaneously generates temperature and resistance changes, and the change values ​​are linearly related to the hydrogen concentration.

Benefits of technology

It achieves high accuracy in detecting low-concentration hydrogen. The detection error of Ti-Ni material is ≤±5% in the range of 0.1-50 vol%, and the detection error of Zr-Co material is ≤±6% in the range of 0.1-50 vol%. It is suitable for different hydrogen leak detection scenarios and simplifies the difficulty of equipment development.

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Abstract

This invention relates to the field of gas-sensitive material preparation technology, specifically a hydrogen-sensitive material, its preparation method, and its application in hydrogen leak detection. For Ti-Ni hydrogen storage alloys, a discharge plasma sintering method is used, placing the powder in a graphite container and sintering it into a block shape at a gradient temperature of 1050℃. For Zr-Co alloys, a mixed raw material (Zr-Co hydrogen storage alloy powder, 10% phenolic resin, and 5% high-purity graphite powder) is used, which is then hot-molded at 400℃ and 2000N. Both processes of this invention retain the hydrogen absorption performance of the materials. The resulting block-shaped hydrogen-sensitive material exhibits simultaneous temperature and resistance changes when absorbing hydrogen, showing a perfect linear correlation with the hydrogen absorption rate and hydrogen concentration, significantly improving detection accuracy and adapting to different leak detection scenarios. The linear fitting equation can be directly used for signal calibration, simplifying the development of detection equipment.
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