GLASS MELTING
Glass melting furnace molybdenum electrode
Rod Ø20–100mm | Length ≤1500mm | Current density 1–3 A/cm²
WeiBeam · Electrode solutions for high-temperature melting
Molybdenum electrodes are used in electric boosting and all-electric melting of container glass, packaging glass, pharmaceutical glass, and photovoltaic and electronic glass. The electrodes are installed in the sidewall or furnace bottom and pass current directly through the glass melt, raising melting capacity and improving temperature uniformity. Selection should account for furnace tonnage, melt temperature, power supply configuration and electrode layout. Standard rods are Ø20–100mm and up to 1500mm long, operated at 1–3 A/cm², with a long-term working temperature of about 1300 °C and stable resistance to glass-melt corrosion.
We provide selection support and custom machining. Materials include pure molybdenum, lanthanum-doped molybdenum and TZM. Diameters, lengths and threaded connections can be produced to drawings, and high-purity samples can be trialled on your production line.
In high-temperature melting and thermal-field systems this part is often used alongside electrodes elsewhere in the line. We recommend selecting them together against furnace structure, assembly method and working temperature to reduce thermal-expansion mismatch between different materials.
FEATURES
Glass melting furnace molybdenum electrode — key features
Core characteristics for furnace conditions and operating requirements.
High-temperature corrosion resistance
Molybdenum melts at 2620 °C and remains structurally stable in glass melt at about 1300 °C.
Uniform current distribution
Conductivity ≥30% IACS at 1–3 A/cm² helps keep melt temperature and melting stable.
Broad size range
Rods Ø20–100mm, length ≤1500mm, customized for sidewall or bottom installation.
Matched materials
Pure Mo, MoLa and TZM options selected by temperature and load duty.
SPECIFICATIONS
Specification data
Electrodes are controlled to YS/T 1312-2019 and accepted under a mutual technical agreement. Special sizes can be customized to furnace conditions.
| Parameter | Specification |
|---|---|
| Furnace types | Container, packaging and pharmaceutical glass; PV and electronic glass furnaces |
| Form | Rod |
| Diameter | Ø20–100mm (customizable) |
| Length | 150–1500mm |
| Molybdenum content | ≥99.95% |
| Current density | 1–3 A/cm² |
| Long-term working temperature | ≈1300 °C (short-term limit ≈1600 °C) |
| Standard | YS/T 1312-2019 |
Material and physical properties
| Parameter | Typical value / note |
|---|---|
| Available grades | Mo1 (pure Mo) / MoLa (lanthanum-doped) / TZM (Ti-Zr-Mo) / Mo-Zr ODS |
| Molybdenum content | ≥99.95% (higher purity by technical agreement) |
| Density | ≥10.2 g/cm³ (varies slightly by grade and condition) |
| Melting point | ≈2620–2623 °C |
| Resistivity (20 °C) | ≈0.053 µΩ·m |
| Conductivity | ≥30% IACS |
| Thermal expansion | ≈5.25×10⁻⁶/°C |
| Elastic modulus | ≈315 GPa |
| Hardness | ≥85 HRB (by grade and condition) |
| Standards | Electrodes to YS/T 1312-2019; rods to ASTM B387 / GB/T 17792; plate and discs to ASTM B386 / GB/T 3876; other parts by technical agreement |
| Factory inspection | Spectral composition, density, metallography, ultrasonic inspection, dimensions and appearance |
| Delivery documents | Mill certificate with full batch traceability |
Typical values for pure molybdenum. MoLa, TZM and special sizes follow the mutual technical agreement and the test report supplied with each batch.
FAQ
Common questions
Selection, customization and quotation questions.
How do I select electrodes for a glass furnace?
Start with furnace tonnage, melt temperature, power supply and electrode layout. Rods are typically Ø20–100mm at 1–3 A/cm². Once we have the furnace parameters, our engineers recommend electrode layout and dimensions.
How much does one molybdenum electrode rod cost?
Price depends on diameter, length, material (pure Mo, MoLa or TZM) and quantity, so it must be quoted per specification. Share the furnace parameters and required sizes and we will quote against current material supply.
Can you machine electrodes to my drawings?
Yes. We machine diameter, length, threads and connections to drawings, including non-standard shapes, and supply a mill certificate with full batch traceability.
CUSTOM
Selection and quotation
Share your furnace structure and process conditions. Our engineers will help select the right electrode and you can request a standard-size sample. We support export customers worldwide with remote technical coordination.