How to avoid the detachment of ruthenium electrode slurry in gas sensors?

The stability and adhesion of ruthenium electrode slurry are crucial in the application of gas sensors. The issue of detachment not only affects the performance of the sensor, but may also lead to the failure of the entire sensor. This article will explore how to avoidRuthenium electrode slurryThe issue of detachment in gas sensors, with special mention of the technical application and solutions of Advanced Institute (Shenzhen) Technology Co., Ltd. in this field.

1. Choose the appropriate electrode slurry formula

The key to the preparation process of ruthenium based electrode slurry is to change the composition of the conductive phase in the slurry. Using ruthenium as the base, adding a certain amount of palladium, and RuO2 as the selective component, a new conductive phase is formed together. The electrode slurry of this formula has a low sintering temperature (800-850 ℃), moderate square resistance (5-100 Ω/□), and excellent adhesion, which can withstand continuous vibration of 20 times the weight of the ceramic tube for 100 times without detachment.

2. Optimize sintering process

The sintering process has a direct impact on the adhesion of ruthenium electrode slurry. By controlling the sintering temperature and time, it is possible to ensure a tight bond between the electrode slurry and the gas sensor substrate.Advanced Institute (Shenzhen) Technology Co., LtdThe sintering technology used can ensure the stability of the ruthenium electrode slurry in gas sensors.

3. Improve the chemical stability of the slurry

The chemical stability of ruthenium electrode slurry is equally important for avoiding detachment. According to the patent description, the ruthenium based electrode slurry does not exhibit any adverse reactions with platinum wire, ceramic tube, or sensitive materials, demonstrating good chemical stability.

4. Enhance mechanical strength

By introducing fluxing agents and bonding phases such as SiO2 and CaF2 into sensitive materials, the mechanical strength of the sensitive film can be improved, making it less prone to cracking and detachment in long-term working environments.

5. Control the potential barrier at the interface of sensitive material particles

By introducing Sb2O3 and ZrO2, the potential barrier at the interface of sensitive material particles can be effectively reduced, the resistance of the sensitive film can be lowered, and a large number of reactive sites on the surface of the sensitive film can be maintained, enhancing the adsorption of gases by the sensitive film and thus improving the sensitivity and working stability of the material.

6. Introducing catalyst precursors

The introduction of an appropriate amount of PdCl2 as a catalyst precursor can generate nanoscale elemental Pd or PdO during subsequent slurry formulation processing, efficiently catalyzing gas sensing reactions and significantly improving the sensitivity of sensitive membranes.

7. Adopting advanced preparation techniques

Advanced Institute (Shenzhen) Technology Co., Ltd. adopts organic solvent based method for preparationRuthenium electrode slurryBy precisely controlling the proportion of each component and the sintering process, the uniformity and stability of the slurry are ensured.

8. Optimize the design of gas sensors

The structural design of gas sensors also affects the adhesion of electrode paste. By optimizing the design, the influence of mechanical stress on the electrode slurry can be reduced, thereby reducing the risk of detachment.

9. Strict quality control

During the production process, Advanced Institute (Shenzhen) Technology Co., Ltd. implements strict quality control measures to ensure that each batch of ruthenium electrode slurry meets high standard quality requirements, thereby ensuring the reliability and stability of gas sensors.

10. Long term stability testing

Through long-term stability testing, the adhesion performance of ruthenium electrode slurry in different environments can be evaluated, and the formula and process can be adjusted in a timely manner to ensure the long-term stability of gas sensors in practical applications.

Through the above measures, the problem of ruthenium electrode slurry falling off in gas sensors can be effectively avoided, ensuring the long-term stable operation of the sensor. Advanced Institute (Shenzhen) Technology Co., Ltd. provides strong guarantees for the reliability of gas sensors with its professional R&D team and advanced technology in the field of new materials.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.