Hafnium Ingot
Ingot is the raw material form of hafnium, usually in the shape of a cylinder with a diameter between 3-25mm. Its purity can reach 99.99%, and it can contain different proportions of zirconium (such as 0.2%, 0.3%, or 0.5%). Ingots are mainly used as raw materials for the production of hafnium products, such as cathodes for X-ray tubes, electrodes for high-voltage discharge tubes, and absorbers for gas filling systems.
Description
Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. is located in the High tech Development Zone of Baoji City, Shaanxi Province. Our main products include plates, rods, tubes, wires, particles, foils and other conventional processed profiles of tantalum, niobium, titanium, nickel, zirconium, hafnium and their alloys, as well as deep processed products such as crucibles, grounding rings, protective tubes, target materials, screws, etc. Integrated factory and trade, customizable, standard products available, 24-hour after-sales service.
brief introduction
Application Fields and Development Prospects
Application areas: divided into four major fields: semiconductor and sputtering target materials, high temperature/vacuum industry, capacitor anodes, and anti-corrosion engineering. Explain the application value.
Development prospects: Looking forward to technological development trends from four directions: purity improvement, large-scale size, process innovation, and sustainability.
Preparation process and precautions
Preparation process: Detailed introduction of three mainstream production processes (electron beam melting method, carbon reduction electron beam melting combination process, plasma melting method), and comparison of process characteristics through tables.
Attention: Analyze the key points in production from three aspects: safety protection, quality control, and process control, and list specific risks and control measures.
Tantalum ingot is a high-purity metal ingot formed by smelting and purifying rare metal tantalum (Ta), and is the core basic material of the tantalum material processing industry chain. Tantalum metal has a series of outstanding physical and chemical properties: its melting point is as high as 3017 ℃, ranking sixth among all metals; The density is 16.65 g/cm ³, which belongs to high specific gravity metals; Simultaneously possessing excellent ductility and mechanical processing performance. These characteristics make tantalum ingots an indispensable key material for high-end manufacturing.
In terms of microstructure, high-quality tantalum ingots must meet strict purity standards. According to industry standards, the purity of tantalum ingots used for semiconductor target materials must reach 99.999% (5N level) or above, with particularly strict control over the content of key impurity elements: interstitial impurity elements carbon (C) ≤ 10ppm, oxygen (O) ≤ 15ppm, nitrogen (N) ≤ 15ppm, hydrogen (H) ≤ 2ppm; High melting point metal impurities such as niobium (Nb) ≤ 2ppm, tungsten (W) ≤ 1ppm, molybdenum (Mo) ≤ 1ppm; The radioactive elements uranium (U) and thorium (Th) are each ≤ 0.001ppm. The total amount of metal impurities (excluding gas elements) shall not exceed 10ppm. At the same time, tantalum ingots need to have a uniform and dense grain structure, with a Vickers hardness (HV/9.8N) of ≤ 85, a density in the range of 16.5-16.6 g/cm ³, and a strict control of ultrasonic flaw detection defect rate below 1%.
Tantalum ingots produced industrially usually have a cylindrical or rectangular shape, with a unique metallic gray surface. According to different end uses, the diameter range of tantalum ingots varies from 200mm to 450mm, and the weight can reach over 300kg. This form of design is beneficial for subsequent pressure processing (such as forging and rolling), while minimizing edge defects generated during the casting process.
On the application side, the high-value applications of tantalum ingots are still concentrated in three major fields: semiconductor sputtering targets, high-temperature vacuum devices, and high-end capacitors, and have shown potential in emerging fields such as biomedical implants. The performance requirements for tantalum ingots in various application scenarios exhibit highly differentiated characteristics, driving the development of preparation processes towards customization and functionalization. Enterprises that master core preparation technologies and layout circular economy models will occupy a strategic advantage in the global tantalum industry chain.
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