High Purity Tungsten Foil | 99.95% Purity

What purity threshold is 99.95%?
Purity is the primary core indicator for measuring the quality of tungsten foil. 99.95% purity is far from a simple number, it represents the ultimate control of key impurity elements such as iron, nickel, molybdenum, carbon, and oxygen.

• Ensure ultimate thermal stability: In vacuum or inert atmosphere environments exceeding 1500 ℃, trace impurities will preferentially evaporate or react with the substrate, leading to material brittleness, deformation, and even pollution of the entire process environment. The high purity of 99.95% ensures that tungsten foil can maintain stable composition and structure even at extreme high temperatures.
• Achieving excellent electronic performance: In the fields of semiconductors and microelectronics, impurity elements can interfere with the distribution of electric fields, affecting the consistency, reliability, and lifespan of devices. High purity is a prerequisite for ensuring its excellent conductivity and serving as the basis for functional components.
• Ensure excellent corrosion resistance: High purity means that the internal grain boundaries of the material are cleaner, effectively resisting acidic, alkaline environments, and corrosion from various molten metals, extending the service life under harsh working conditions.

Core performance: Comprehensive advantages beyond ordinary
In addition to its extremely high purity, the comprehensive performance of high-purity tungsten foil makes it a solution to complex challenges:

• Unparalleled high temperature resistance: With the highest melting point of all metals at 3422 ℃, it can maintain excellent mechanical strength and morphological integrity at temperatures where many metals have already liquefied (usually working for a long time at 1600-2500 ℃).
• Ideal high temperature and low creep resistance: Under continuous high temperature and stress, its ability to resist slow plastic deformation is extremely strong, which is crucial for use as a heater, heat shield, or load-bearing component.
• Excellent thermal conductivity and low thermal expansion: It can quickly achieve uniform distribution of heat, reduce local thermal stress, and its extremely low coefficient of thermal expansion ensures dimensional stability under rapid cooling and heating conditions.

Key application areas: Accurately solving industry pain points
1. Semiconductor and integrated circuit manufacturing
Core role: As a heater, heat shield, and diffusion barrier in key equipment such as CVD and PVD in chip manufacturing. Its high purity and stability are the lifeline to ensure chip yield and prevent silicon wafer contamination.
Frontier applications: It is one of the most ideal substrate materials for the chemical vapor deposition growth process of two-dimensional materials such as graphene and molybdenum disulfide.
2. Aerospace and Defense Technology
Core function: Used as high-temperature seals and insulation pads for rocket engines. By utilizing its high-density characteristics, vibration counterweights for satellites and spacecraft in microgravity environments can be produced to achieve precise balance.
3. New energy and vacuum coating
Core function: In vacuum electron beam evaporation (EBE), it serves as an evaporation boat and crucible for carrying aluminum, silver, and dielectric materials. In the development of perovskite photovoltaic cells, high-purity tungsten foil is also used as a key heat treatment carrier substrate.
4. High end medical and scientific research equipment
Core function: Used in large medical equipment such as CT scanners and linear accelerators, as collimator blades for precise filtering and shielding of X-rays, their high density and purity guarantee imaging quality and treatment accuracy.
How to choose a reliable supplier?
In the face of increasing demand, it is crucial to choose qualified suppliers and technical partners. You need to pay attention to the following points:

• Authenticity and consistency of purity: Does the supplier have authoritative third-party component testing reports? Can we ensure absolute stability of ingredients between batches?
• Dimensional accuracy and surface quality: Does the thickness tolerance, flatness, and surface roughness of the foil meet the assembly requirements of your precision equipment?
• Deep processing and customization capabilities: Can suppliers provide value-added services such as stamping, etching, and cleaning to directly deliver components that meet your design requirements?

Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd., relying on its deep accumulation in the field of high-performance rare metals, strictly produces high-purity tungsten foil (purity ≥ 99.95%) in accordance with ASTM, GB and other standards, with a thickness range starting from 0.05mm, widely supporting applications in the above-mentioned cutting-edge fields. We not only provide standard specification products, but also have strong customization and development capabilities, committed to becoming your trusted material solution partner.
Email: zhwctanbc103@163.com

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