------------------------------
## Sb99.65 Antimony Ingot: Comprehensive Technical Manual ## I. Core Technical Standards (Chemical Composition)
The compositional requirements for Sb99.65 are as follows:
| Component | Content Specification | Industry Impact |
|---|---|---|
| Antimony (Sb) | ≥ 99.65% | Primary component; determines the metal's strength and flame-retardant efficiency. |
| Arsenic (As) | ≤ 0.10% | Critical impurity. In alloys, it can refine grain structure; however, in battery applications, it requires strict control. |
| Iron (Fe) | ≤ 0.03% | Affects the color of flame retardants; elevated levels can cause the product to yellow. |
| Sulfur (S) | ≤ 0.06% | Affects the metal's brittleness and processing performance. |
| Copper (Cu) | ≤ 0.05% | Affects the alloy's corrosion resistance. |
| Lead (Pb) | ≤ 0.30% | A parameter requiring particular attention in lead-acid battery alloy applications. |
------------------------------
## II. Physical and Microstructural Properties
* **Cold Expansion Property:** Antimony is one of the few metals that expands in volume upon solidification. This property allows it to perfectly fill molds during casting, ensuring that the contours of the finished product are exceptionally sharp (e.g., in movable type printing and precision parts).
* **Hardening Mechanism:** Antimony atoms enter the lead crystal lattice, inducing solid-solution strengthening. The addition of even a small amount can increase the hardness of soft lead several-fold.
* **Appearance and Physical Properties:** A silvery-white, brittle solid; its fracture surface exhibits a purplish-blue luster. It is insoluble in water and possesses strong resistance to acid corrosion (with the exception of strong oxidizing acids).
------------------------------
## III. Detailed Applications ## 1. Metallurgical Alloys (Hardening Agents)
* **Lead-Acid Batteries:** Used in the manufacture of grid plates for automotive starter batteries and industrial traction batteries (e.g., for forklifts and mining equipment). It enhances the mechanical strength of the plates and prevents deformation during the charging and discharging cycles. * **Bearing Alloys (Babbitt Metal):** Forms anti-friction alloys in combination with tin and copper, used in the bearing shells of large-scale generator sets and marine vessels. Antimony increases the hardness of the bearing and facilitates the formation of microscopic oil-retention pockets on its surface to aid lubrication.
* **Cable Sheathing:** Antimony is added to the lead sheathing of submarine or underground cables to prevent mechanical damage caused by external pressure.
## 2. Chemical Industry (Core: Flame Retardants)
* **Antimony Trioxide (Sb₂O₃) Production:** 99.65% purity antimony ingots serve as the primary raw material for the manufacture of flame retardants.
* **Electronics & Electrical Appliances:** Flame-retardant treatment for computer casings, mobile phone shells, and printed circuit boards (PCBs).
* **Transportation:** Fire-retardant coatings for high-speed rail seating, aircraft interiors, and automotive linings.
* **Textiles & Plastics:** Applications in carpets, blackout curtains, and the outer sheathing of wires and cables.
## 3. Glass & Ceramics Industry
* **Clarifying Agents:** Used in the melting of TV substrate glass and optical glass to eliminate bubbles and enhance transparency.
* **Opacifiers & Pigments:** Used in ceramic glazes and enamels to provide corrosion-resistant yellow or gray hues, while also enhancing surface gloss.
## 4. Defense & Specialized Industries
* **Ammunition Industry:** Hardens lead bullet cores, ensuring the projectile retains its shape while spinning at high velocity within the gun barrel.
* **Ignition Compositions:** Antimony sulfide is used in the manufacture of detonators, flares, and smoke grenades.
* **Semiconductor Base Materials:** Serves as the foundational raw material for further purification into high-purity antimony (used in infrared detectors and Hall effect sensors).
## 5. Mechanical Processing
* **Precision Casting:** Utilizes antimony's property of expanding upon solidification to create high-precision molds and intricate small components.
* **Lubricant Additives:** Antimony-based compounds can be incorporated as anti-wear additives into extreme-pressure (EP) greases to prevent surface scuffing on the metal components of heavy machinery.
------------------------------
## IV. Trade & Market Characteristics
1. **Packaging Specifications:** Standard ingots weigh approximately 25 kg each; they are typically packaged in units of 1 metric ton (1,000 kg), utilizing either wooden crates or pallets. 2. Strategic Significance: Antimony is an extremely scarce, non-renewable resource. As the world's largest producer, China implements an export quota system for 99.65% purity antimony ingots.
3. Key Quality Parameters:
* Most valued by alloy manufacturers: The ratio of Arsenic (As) to Lead (Pb).
* Most valued by flame retardant manufacturers: Iron (Fe) content (which affects whiteness).
------------------------------