Molybdenum-Lanthanum Wire
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Molybdenum-Lanthanum Wire (Mo-La Wire) is a high-performance alloy wire made from high-purity molybdenum doped with a small amount of lanthanum or lanthanum oxide (La₂O₃). The addition of lanthanum improves the microstructure of molybdenum, enhancing its high-temperature performance, creep resistance, and recrystallization temperature. Mo-La wire is widely used in high-temperature applications such as lighting, vacuum electronics, furnace components, and aerospace parts.
1. Chemical Composition
| Element | Typical Content (wt%) |
Molybdenum (Mo) |
≥ 99.90% |
Lanthanum Oxide (La₂O₃) |
0.3–1.2% |
Other Impurities |
≤ 0.05% (total) |
2. Key Properties
Melting Point: ~2623°C (same as pure molybdenum)
Recrystallization Temperature: 1400–1600°C (higher than pure Mo at ~1100°C)
Creep Resistance: Excellent high-temperature mechanical strength and dimensional stability
Ductility: Improved ductility and workability due to refined grain structure
Oxidation Resistance: Better than pure molybdenum in oxidative atmospheres
Formability: Suitable for fine wire drawing and complex forming
3. Typical Applications
Lighting Industry
Filaments, support wires, and coiled wires for halogen, HID, and automotive lamps
High-lumen, long-life lamp components
Vacuum Electronic Devices
Cathode supports, grid wires, electrode frameworks in electron tubes and microwave devices
High-Temperature Furnaces
Heating elements, hooks, hangers, and structural components in vacuum or inert atmosphere furnaces
Aerospace and Nuclear Applications
High-temperature supports and heat shields under extreme thermal and mechanical loads
Crystal Growth and Semiconductor Equipment
Hot zones, seed holders, and frame materials in Czochralski furnaces
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