Platinum Wire in Glass & Ceramic Processing Role in Stirring, Seeding & Temperature Sensing
                     Platinum Wire in 
Glass & Ceramic 
Processing: Role in 
Stirring, Seeding & 
Temperature Sensing
Submitted by:
M-Kube Enterprise Pty Ltd
Why Platinum Wire Is the Industrial 
Standard in Molten Glass & Ceramic 
Furnaces
• Pt wire maintains structural integrity above 1700–1750°C, 
outperforming Mo, W, and Ni-based alloys.
• Pure platinum wire provides unmatched chemical inertness in silicates, 
borates, phosphates, and alkali-rich glass tanks.
• Platinum alloy wire (Pt-Rh, Pt-Ir) resists creep under continuous stirring 
loads.
• Does not oxidize even in high-oxygen ceramic furnaces.
• Fully compliant with chemistry platinum wire purity requirements for 
contact with optical and dielectric glasses.
Metallurgical Structure 
That Enables Performance
• FCC crystal structure stays ductile 
even at ultra-high temperatures → 
no catastrophic brittle fracture.
• Grain growth controlled during 
production allows platinum 
thermocouple wire to deliver stable 
EMF.
• Platinum rhodium thermocouple 
wire gains strength from Rh 
additions, improving performance 
at 1600–1700°C.
• Very low diffusion coefficient 
prevents metal contamination into 
molten glass.
Platinum Wire Grades Used in 
Glass & Ceramic Plants
1. Pure Platinum Wire (99.95–99.999%)
• Used for seeding loops, micro-stirrers, viscometer wires, and immersion 
electrodes.
2. Pt-10Rh and Pt-20Rh Wire (Platinum Rhodium Wire)
• Used for Type S, R, and B thermocouples, furnace probes, and structural 
hooks.
3. Platinum Coated Wire
• Used in cost-sensitive assemblies where only the surface needs chemical 
inertness.
Functional Role 1: High-Purity 
Stirring & Homogenization
• Pt wire is machined into coils, helical paddles, and nested stirring 
assemblies.
• No reaction with B₂O₃, SiO₂, Na₂O, K₂O, PbO, or rare-earth modifiers.
• Prevents color shifts in optical glass due to zero metal ion leaching.
• High fatigue resistance allows continuous stirring cycles up to 800–
1200 hours.
• Platinum wire for sale, buy platinum wire for OEM stirring assemblies.
Functional Role 2: Crystal Seeding in 
Specialty Glass & Ceramics
• Pure platinum wire acts as a chemically inert nucleation 
support during:
 – YAG and Nd:YAG crystal formation
 – Lithium aluminosilicate glass-ceramic seeding
 – Optical and dielectric ceramic crystallization
• No catalytic nucleation → critical for laser glass uniformity.
• Zero interaction with crystallizing phases like cordierite, 
spodumene, borates.
Functional Role 3: High-Temperature 
Temperature-Sensing (Thermocouples)
• Platinum thermocouple wire (Type S, R) provides stable EMF from 0–1600°C.
• Platinum rhodium thermocouple wire withstands severe alkali vapor attack in glass tanks.
• Drift