Description

Key Properties & Advantages
This LSM:8YSZ (1:1) composite slurry balances electrochemical activity with structural stability, optimized for SOFC cathode requirements:

1:1 LSM:8YSZ Ratio: The synergistic blend combines LSM??s electronic conductivity and ORR activity with 8YSZ??s oxygen ion conductivity and thermal compatibility with 8YSZ electrolytes??minimizing interfacial resistance and enhancing cathode performance.
High Solids Content (60?C75%): Enables the formation of dense yet porous cathode layers in a single pass, ensuring sufficient gas diffusion (for oxygen) while maintaining strong adhesion to electrolyte substrates (e.g., 8YSZ).
Fine Fineness (<5 ??m): Ensures uniform dispersion of LSM and 8YSZ particles, preventing agglomerates that could block oxygen transport or disrupt ion/electron pathways. The sub-5 ??m size promotes intimate contact between LSM and 8YSZ phases, optimizing ORR activity at phase boundaries. Tailored Viscosity (2200?C3000 cP): Optimized for screen printing (100?C325 mesh) and doctor blading, ensuring smooth, crack-free coating with controlled thickness (10?C30 ??m) and uniform coverage on flat or curved SOFC electrolyte surfaces. Thermal & Chemical Stability: Retains its microstructure and conductivity at 800?C1000??C in oxidizing atmospheres, with thermal expansion matching 8YSZ electrolytes??reducing interfacial stress during thermal cycling. Porosity Control: Sintering at 1100?C1300??C yields a porous structure (20?C30% porosity) ideal for oxygen diffusion, while maintaining sufficient connectivity between LSM (electron transport) and 8YSZ (ion transport) phases. Core Applications Solid Oxide Fuel Cell (SOFC) Cathodes This composite slurry is a critical component in SOFC cell design, forming high-performance cathode layers: SOFC Cathode Layers: Applied directly onto 8YSZ electrolytes, it forms the active cathode layer where oxygen reduction occurs, leveraging the 1:1 LSM:8YSZ blend to optimize electron/ion transport and ORR kinetics. Thick-Film Cathodes: Ideal for planar or tubular SOFC cells, where its viscosity and solids content enable the formation of robust, uniform cathode layers (10?C30 ??m) that withstand thermal cycling and long-term operation. Cathode-Electrolyte Interfaces: Promotes strong adhesion to 8YSZ electrolytes, minimizing interfacial resistance and preventing delamination??critical for stack durability in high-temperature SOFC systems. The active components of the LSM:8YSZ (1:1) composite cathode slurry are LSM ((La?.??Sr?.??)?.??MnO?????) and 8YSZ ((Y?O?)?.??(ZrO?)?.??) in a 1:1 weight ratio, with a solids content of 60?C75 wt.% (including LSM, 8YSZ, and binder system). The fineness (maximum particle size, laser diffraction method) is <5 ??m, and the viscosity is 2200?C3000 cP (measured at 25??C using the Brookfield method). The binder system is a high-temperature organic binder (burns out cleanly at 400?C600??C), and the color is dark gray to black. The sintering temperature is 1100?C1300??C in air (2-hour ramp + 1-hour hold). Its coating methods are optimized for screen printing (100?C325 mesh) and doctor blading; if necessary, viscosity can be adjusted with distilled water to adapt to specific equipment. Drying requires air-drying at 60?C80??C for 30?C60 minutes to remove solvents and ensure no cracking before sintering. Sintering is performed by firing at 1100?C1300??C in air to densify the layer, remove binders, and form a porous cathode structure with interconnected LSM and 8YSZ phases, thereby activating oxygen reduction reaction (ORR) activity. Each batch of this slurry undergoes rigorous testing.