Tantalum Oxide (Ta₂O₅): High-temperature Alloys, LiTaO₃ Crystals, and Thin-film Deposition Targets

Tantalum oxide appears as rhombohedral prisms, remaining white at 1000-1200°C and turning gray at higher temperatures. Two variants are known: α-Ta₂O₅ (high-temperature form) and β-Ta₂O₅ (low-temperature form). The β-to-α transformation occurs at 1360±5°C.

Properties:

• α-form: Melting point 1872±10°C, relative density 8.37
• β-form: Melting point 1785±30°C, relative density 8.18
• β-Ta₂O₅ transforms into amorphous Ta₂O₅ before melting (relative density 7.3)

Applications

1. For manufacturing high-temperature alloys and superconducting alloys
2. For manufacturing optical glass
3. For producing lithium tantalate single crystals
4. For manufacturing coating materials

Product Series

Health and Safety Information

Packaging Specifications

• Standard packaging: 50 kg/drum, 500 kg/pallet, ton bags
• Sample packaging: 500 g/bag, 1 kg/bottle

About Tantalum Oxide
High-purity tantalum solution is obtained from impure tantalum solution via liquid-liquid extraction:

1. Tantalum solution is transferred to a neutralization/precipitation tank. NH₃ gas is introduced under agitation until pH reaches 8-9, forming Ta(OH)₅ precipitate, which is filtered.
2. The hydroxide is dissolved in HF and H₂SO₄ in a decomposition tank, then subjected to secondary organic extraction for high-purity tantalum solution.
3. The purified solution is neutralized with NH₃ to pH>9 to regenerate Ta(OH)₅.
4. The precipitate is washed with purified water until filtrate contains <0.02g/L F⁻, then dried.

Calcination Process

1. Heat to 200°C (hold 2 hours)
2. Heat to 500°C (hold 5 hours)
3. Heat to 650°C (hold 2 hours)
4. Heat to 800°C (hold 4 hours)
5. Cool to 200°C, then sieve to obtain high-purity Ta₂O₅