Tantalum (V) oxide (Ta2O5 or tantalum pentoxide) purity 99.99% Cas 1314-61-0
| Tantalum Pentoxide | |
| Synonyms: | Tantalum(V) oxide, Ditantalum pentoxide |
| CAS Number | 1314-61-0 |
| Chemical formula | Ta2O5 |
| Molar mass | 441.893 g/mol |
| Appearance | white, odorless powder |
| Density | β-Ta2O5 = 8.18 g/cm3, α-Ta2O5 = 8.37 g/cm3 |
| Melting point | 1,872 °C (3,402 °F; 2,145 K) |
| Solubility in water | negligible |
| Solubility | insoluble in organic solvents and most mineral acids, reacts with HF |
| Band gap | 3.8–5.3 eV |
| Magnetic susceptibility (χ) | −32.0×10−6 cm3/mol |
| Refractive index (nD) | 2.275 |
High Purity Tantalum Pentoxide ChemicalSpecification
| Symbol | Ta2O5(%min) | Foreign Mat.≤ppm | L.O.I | Size | ||||||||||||||||
| Nb | Fe | Si | Ti | Ni | Cr | Al | Mn | Cu | W | Mo | Pb | Sn | Al+Ka+Li | K | Na | F | ||||
| UMTO4N | 99.99 | 30 | 5 | 10 | 3 | 3 | 3 | 5 | 3 | 3 | 5 | 5 | 3 | 3 | - | 2 | 2 | 50 | 0.20% | 0.5-2µm |
| UMTO3N | 99.9 | 3 | 4 | 4 | 1 | 4 | 1 | 2 | 10 | 4 | 3 | 3 | 2 | 2 | 5 | - | - | 50 | 0.20% | 0.5-2µm |
Packing : In iron drums with inner sealed double plastic.
What is Tantalum Oxides and Tantalum Pentoxides used for?
Core application areas
1. Electronic functional materials
1. Surface Acoustic Wave (SAW) Filter Substrate:
- The core raw material for synthesizing lithium tantalate (LiTaO₃) single crystals, which is used to manufacture radio frequency filters for mobile communication devices
- Terminal applications: smartphones/tablets (5G band support), GPS modules, IoT smart meters
- Performance advantage: frequency stability ±0.5ppm (-40℃ to +85℃)
2. Semiconductor Precursors:
- Tantalum carbide (TaC) synthetic raw material: for superhard tool coating (microhardness ≥ 2200 HV)
- Sputtering target: DRAM capacitor dielectric layer deposition (dielectric constant εr = 25-30)
2. Optical Technology
1. High-end optical system:
- Refractive index enhancer: Increase the refractive index of optical glass to nd=1.75-2.20 (400-700nm)
- Low absorption coating: Preparation of anti-reflection film (extinction coefficient k<0.001@550nm)
2. Special fiber applications:
- Fiber Bragg Grating dopants: Improve temperature sensitivity to 15pm/°C
- Infrared optical components: Transmittance in the 3-5μm mid-infrared band > 92%
3. Industrial Catalysis and Modification
1. Chemical Catalysis:
- Olefin epoxidation catalyst: conversion rate > 95% (fixed bed reactor)
- Photocatalyst for hydrogen production from water (composite with CdS)
2. Material modification:
- Corrosion-resistant alloy additives: Improve the oxidation resistance of nickel-based alloys at 1100°C
- Ceramic reinforcement phase: Fracture toughness of alumina-based composites increased by 40%
| property | Parameter range | Test standards |
| Purity grade | Electronic grade: 99.95%-99.999% | ICP-MS GB/T 26008 |
| Crystal structure | Orthorhombic phase/amorphous phase (optional) | XRD ISO 20203 |
| Particle size distribution | D50: 0.5-10μm (nanoscale can be customized) | SEM ISO 13322-1 |
| Dielectric properties | Breakdown field strength>600kV/cm | IEC 60270 |
| Thermal stability | Melting point: 1872℃±10℃ | DSC ISO 1135 7 |
Security and Compliance
Transport Classification: NON-HAZARDOUS (UN number not applicable)
Storage requirements: dry environment at room temperature, avoid contact with strong acid
Environmental certification:
- Compliant with RoHS 3.0 Directive (2015/863/EU)
- Substances not listed under REACH SVHC
- Compliance with the Conflict Minerals Policy (CMRT 6.0)
Quality Control
1. Grade Standards :
- Optical grade: ISO 10110-7 fringe grade A
- Electronic grade: SEMI C8.1 metal impurity control
2. Testing guarantee:
- Provide XRF elemental analysis report for each batch
- BET surface area detection (0.5-10m²/g adjustable)
- Radionuclide screening (U/Th < 1 ppb)
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Typical application cases
- A 5G base station filter manufacturer uses electronic-grade Ta₂O₅, reducing insertion loss to 1.2dB (3.5GHz band)
- High-end camera lens manufacturers use optical-grade products to achieve a refractive index of nd=2.15@587.6nm
Things to note
• Nano powder handling must comply with ISO 13137 respiratory protection standards
• Corundum crucibles are recommended for high temperature sintering applications
• Optical coatings need to control the deposition rate to less than 0.5nm/s
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This description is based on the general characteristics of tantalum pentoxide. The specific parameters are subject to the COA (quality inspection report).
Customized technical solutions can be provided for special forms (nanopowders/sputtering targets/single crystal substrates).
