Tellurium ingot

The most critical factor is purity levels, typically ranging from 99.9% (3N) to 99.999% (5N). For thermoelectric or semiconductor applications, you must verify the impurity concentration limits for elements like Selenium, Copper, and Iron. Additionally, confirm the physical dimensions and weight per ingot (commonly 1kg to 5kg) to ensure they fit your melting or processing equipment.

Tellurium is primarily used as a metallurgical alloying agent to improve the machinability of steel and copper. It is also a vital component in Cadmium Telluride (CdTe) solar panels, thermoelectric cooling devices, and optical discs. Buyers should specify the end-use to help suppliers provide the correct grade, such as commercial grade for steel or high-purity electronic grade for semiconductors.

Suppliers should provide a Certificate of Analysis (COA) for every batch. Ensure the product meets ASTM B418 standards or equivalent international benchmarks. Since Tellurium compounds can be toxic, the supplier must provide a comprehensive Material Safety Data Sheet (MSDS) and comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) if exporting to the EU.

Tellurium is a minor metal, and its price is often volatile, influenced by the copper refining industry (as it is a byproduct). To optimize costs, consider long-term supply contracts rather than spot-market purchases. On Made-in-China.com, you can compare tiered pricing based on volume, where bulk orders exceeding 500kg often yield significant discounts.

Tellurium ingots are brittle and must be vacuum-sealed in plastic to prevent oxidation and then packed in wooden crates or reinforced steel drums. Because it is classified under UN 3288 (Toxic Solid, Inorganic) in certain forms, you must ensure the freight forwarder is experienced in handling Class 6.1 Hazardous Materials and that all packaging bears the correct IMO/IMDG labels.

Use Secured Trading Services on Made-in-China.com to protect your payment until the goods are verified. For high-value shipments, it is highly recommended to appoint a third-party inspection agency (like SGS or Intertek) to conduct pre-shipment sampling and assay testing to confirm the purity matches the COA.

The primary risks include purity fraud and customs delays due to improper documentation. Always verify the supplier's export licenses for strategic metals. Be aware of Export Tax Rebate policies in China, which can affect the final quotation. Ensure your Incoterms (e.g., CIF or DAP) clearly define the point where risk transfers, especially given the fragile nature of the ingots.

Focus on consistency of supply rather than just the lowest price. Ask for historical assay data from previous shipments to verify quality stability. Negotiate for flexible payment terms (e.g., 30% deposit, 70% against BL) once a relationship is established, and always confirm the lead time, as high-purity refining can take 15-30 days depending on current stock.