What Is Platinum DPH - Dispersion Hardened Platinum?
TL;DR — Quick Summary
Platinum DPH (Dispersion Hardened Platinum) is a high-strength, oxide-dispersion-hardened grade of platinum. It is highly resistant to corrosion and ideal for high-temperature industrial applications where rhodium cannot be used. Common uses include thermocouple thimbles, glass manufacturing, crucibles, electrodes, and crystal growth equipment. Its enhanced microstructure increases longevity and allows thinner wall designs, reducing material costs.
What is Platinum DPH / Pt DPH?
Platinum DPH is pure platinum strengthened through oxide dispersion hardening. The process involves introducing fine oxide particles into the platinum, which modifies the microstructure and increases the material’s hardness.
This makes Platinum DPH particularly suited for high-temperature applications and harsh industrial environments where conventional platinum might fail or wear out faster.
Density-HT
Applications of Platinum DPH
Platinum DPH is widely used in industries requiring high-temperature performance and corrosion resistance:
- Glass manufacturing – crucibles, casting dishes, thermocouple thimbles
- Crystal growth – semi-finished products and specialised crucibles
- Electrodes – chemical and industrial applications
- Refractory linings – thermocouple sheaths for glass melts
- High-temperature process equipment – where rhodium cannot be used
Benefits of Platinum DPH
The addition of oxide particles provides the most effective strengthening mechanism for platinum:
- Enhanced hardness – improves mechanical strength at high temperatures
- Reduced corrosion sensitivity – particularly along grain boundaries
- Extended lifespan – allows thinner walls for thermocouples, crucibles, and other components, reducing material costs
- Economic efficiency – stronger material means less platinum is required without sacrificing durability
Key Characteristics
| Property | Specification |
|---|---|
| General Designation | Platinum DPH |
| Applications | Crucibles, electrodes, casting dishes, thermocouple thimbles, glass manufacturing, crystal growth crucibles |
| Product Forms | Wire, sheet, tube |
| Density | 21.45 g/cm³ |
Why Platinum DPH is Ideal for Temperature Sensors
Platinum DPH is commonly used in high-accuracy thermocouple sheaths because of its:
- High corrosion resistance in molten glass and other aggressive media
- Mechanical durability at extreme temperatures
- Ability to maintain structural integrity even in thin-walled components
Using Pt DPH ensures reliable long-term performance and reduces replacement costs, making it a trusted choice for industrial engineers.
Why Platinum DPH is Ideal for Temperature Sensors
What does DPH stand for?
DPH stands for Dispersion Hardened Platinum, indicating that the platinum is strengthened with fine oxide particles.
Can Platinum DPH replace rhodium alloys?
Yes, in high-temperature applications where rhodium is unsuitable or not tolerated.
What forms does Platinum DPH come in?
Wire, sheet, and tube, suitable for thermocouples, crucibles, electrodes, and other high-temperature components.
Why is Platinum DPH more economical than pure platinum?
Its increased strength and corrosion resistance allow thinner walls, reducing the overall material required without compromising performance.
Where is Platinum DPH most commonly used?
Glass manufacturing, crystal growth, high-temperature electrodes, crucibles, and thermocouple applications.
If you want to order a temperature sensor or you are unsure exactly what you need, get in touch and we can help you.