Description

Key Properties & Advantages
LSGM’s performance stems from its optimized perovskite structure and precise elemental doping:

Controlled Particle Size (0.4–0.7 μm): Enables dense sintering at moderate temperatures (1300–1450°C), forming gas-impermeable electrolyte layers with uniform microstructure—critical for minimizing fuel/oxidant crossover in IT-SOFCs.
Moderate Specific Surface Area (6–10 m²/g): Balances sinterability with surface reactivity, promoting strong adhesion to electrode layers (e.g., LSCF cathodes, Ni-based anodes) while maintaining ionic transport efficiency.
Low Moisture Content (<1 wt.%): Prevents agglomeration during storage and processing, ensuring uniform dispersion in slurries, tapes, or green bodies—essential for consistent conductivity in electrolyte films. High Oxygen Ion Conductivity: Mg²⁺ doping on Ga³⁺ sites creates oxygen vacancies, enabling ionic conductivity (10⁻¹–10⁰ S/cm at 700°C)—outperforming YSZ in the 600–800°C range, reducing IT-SOFC operating temperatures and extending device lifetime. Perovskite Structural Stability: Retains its ABO₃ crystal structure under oxidizing and reducing atmospheres, with minimal phase decomposition at operating temperatures—ensuring long-term durability in IT-SOFC stacks. Thermal Compatibility: Matches the thermal expansion coefficients of common IT-SOFC electrodes, reducing interfacial stress and improving stack stability during thermal cycling. Core Applications Intermediate-Temperature Solid Oxide Fuel Cells (IT-SOFCs) LSGM is a premier electrolyte material for IT-SOFCs, where lower operating temperatures drive efficiency and cost reduction: IT-SOFC Electrolytes: Functions as the primary ion-conducting layer in 600–800°C systems, enabling higher power density than YSZ at these temperatures while reducing thermal stress on stack components. Thin-Film Electrolytes: Ideal for thin-film IT-SOFC designs (e.g., anode-supported or cathode-supported configurations), where its high conductivity minimizes electrolyte resistance even in sub-micron thicknesses. Hydrocarbon-Fueled SOFCs: Exhibits better resistance to carbon deposition than zirconia-based electrolytes when paired with appropriate anodes, supporting direct use of methane or natural gas as fuels. Oxygen Separation Membranes High-Temperature Oxygen Separation: Used in dense membranes for industrial gas purification (e.g., oxygen enrichment from air), leveraging its high ionic conductivity and stability in oxidizing environments. Solid-State Electrolyzers Water/CO₂ Splitting: Enables efficient electrochemical splitting of water (H₂O → H₂ + ½O₂) or CO₂ (CO₂ → CO + ½O₂) in solid-state electrolyzers, supported by its high ionic conductivity at 600–800°C. The technical specifications are as follows: Chemical Composition La₀.₉Sr₀.₁Ga₀.₈Mg₀.₂O₃₋δ (perovskite structure), Particle Size (D50) 0.4–0.7 μm (laser diffraction), Specific Surface Area 6–10 m²/g (BET method), Moisture Content <1 wt.% (Karl Fischer titration), Crystal Structure Orthorhombic/perovskite, Color Pale yellow to off-white crystalline powder. Quality Assurance Each batch of LSGM undergoes rigorous testing to ensure reliability: X-ray diffraction (XRD) to confirm perovskite phase purity and crystal structure. Particle size analysis (laser diffraction) to verify 0.4–0.7 μm distribution. BET surface area measurement to validate 6–10 m²/g range. Moisture content testing to ensure compliance with <1 wt.% specification. Ionic conductivity testing (optional) to confirm performance at 600–800°C.