QUARTZ / OPTICAL
Quartz and optical glass molybdenum electrode
Low C/O impurities | Rod or plate | All-electric and boosting compatible
WeiBeam · Electrode solutions for high-temperature melting
These electrodes serve the melting of quartz glass, optical glass and glass-ceramic, where transmission, homogeneity and impurity levels are tightly specified. As the heating electrode in contact with the melt, electrode purity directly affects final quality. Electrodes for these duties need strict control of carbon, oxygen and other impurities plus a dense structure to limit contamination. Quartz glass furnaces typically use all-electric melting, with electrodes working steadily in glass melt at about 1300 °C.
We customize rod and plate forms to the furnace and melting process, advise on all-electric and boosting configurations, and support sample testing.
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
Quartz and optical glass molybdenum electrode — key features
Core characteristics for furnace conditions and operating requirements.
Low impurity levels
Strict control of C, O and metallic impurities limits effects on melt purity and transmission.
High-temperature stability
Dense and erosion resistant in glass melt at about 1300 °C for stable melting.
Built for premium melting
Rod or plate forms for quartz all-electric melting and optical glass boosting.
Custom sizes
Diameter, length and form set by furnace structure and melting process.
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 |
|---|---|
| Process | Quartz, optical and glass-ceramic melting |
| Form | Rod / plate |
| Impurity control | Low C/O and metallic impurities, tightly controlled to standard |
| Molybdenum content | ≥99.95% |
| Long-term working temperature | ≈1300 °C (short-term limit ≈1600 °C) |
| Configuration | All-electric / electric boosting |
| Surface | Turned / ground / polished (customizable) |
| 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.
Do quartz glass furnaces need especially pure electrodes?
Yes. Quartz and optical glass are sensitive to transmission and homogeneity, so carbon, oxygen and metallic impurities in the electrode must be tightly controlled. We recommend Mo ≥99.95% with composition test data to standard.
How much does an electrode rod cost?
Price depends on diameter, length, material and order quantity and must be quoted per specification. Provide the required sizes and we will quote against current supply and machining requirements.
Rod or plate electrodes for optical glass melting?
It depends on furnace structure and power supply. All-electric furnaces commonly use rods along the bottom or sidewall, while some processes use plates. With furnace parameters our engineers can recommend layout and dimensions.
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.