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AEM Deposition
Evaporation Materials

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Categories of Evaporation Materials

Pure Metal Evaporation Material

Pure metal evaporation materials are commonly used for applications like metal reflection films and vacuum coatings. We offer these materials in various sizes to meet your specific requirements.

Oxide Evaporation Material

Oxide evaporation materials are primarily used to create transparent films, laser multilayer films, and interference filters. We provide these materials in a variety of shapes and sizes for your convenience.

Compound Evaporation Material

Compound evaporation materials, such as fluoride, sulfide, and tellurium, are used for making transparent films, optical filters, and coatings on plastic substrates.

Alloy Evaporation Material

Alloy evaporation materials, created by melting and cooling different components at high temperatures, have a wider range of industrial applications compared to pure metals.

What is Evaporation Materials? A Quick Guide for First-Time Buyers

Evaporation materials are substances used in the physical vapor deposition (PVD) process to create thin films on various surfaces. During PVD, these materials are heated until they vaporize into atoms or molecules. The vapor then travels through a vacuum or low-pressure environment and condenses onto a substrate, forming a uniform coating.

These materials can be pure elements, alloys, or compounds, depending on the desired properties of the final coating. They are essential in producing high-quality films for applications such as optical coatings, mirrors, decorative finishes, and protective layers against wear and corrosion.

In essence, evaporation materials are the building blocks of many advanced coatings used in industries like electronics, aerospace, and manufacturing.

Manufacturing Process of Evaporation Materials

1. Raw Material Selection

The first step in manufacturing high-quality evaporation materials is the careful selection of raw materials. Only pure, high-grade metals or compounds are chosen to ensure optimal performance during evaporation. For metallic evaporation materials, purity is paramount, often exceeding 99.99%. The raw materials are sourced from reputable suppliers to guarantee the consistency and reliability of the final product.

2. Material Purification

After selection, the raw materials undergo a purification process to remove any impurities that may affect the quality of the final product. Techniques such as zone refining, chemical vapor deposition (CVD), or vacuum melting are often employed to achieve ultra-high purity levels. For non-metallic materials, chemical refining processes are used to eliminate contaminants that could interfere with thin-film deposition.

3. Melting and Casting

In this stage, the purified raw materials are melted in high-vacuum or inert gas environments to avoid contamination from atmospheric gases. Vacuum induction melting (VIM) or electron beam melting (EBM) is often used depending on the material being processed. The molten material is then cast into desired shapes, typically in the form of ingots, rods, or billets, suitable for further processing.

4. Forming and Shaping

Once cast, the material undergoes forming and shaping to achieve the desired form for evaporation, such as pellets, slugs, or granules. This step typically involves machining, forging, or pressing techniques to shape the materials according to customer specifications. In some cases, materials are processed into thin sheets or discs, especially when used in larger evaporation systems.

5. Powder Processing (Optional)

For certain applications, evaporation materials may need to be in powder form. In this case, the cast material is milled into fine powders using ball milling or atomization techniques. The powders are then sieved and classified by particle size to ensure uniformity.

6. Hot Pressing and Sintering

In some cases, the material is consolidated using hot pressing or sintering to achieve a specific density and structure. This process involves subjecting the material to high temperatures and pressures to bond the particles and eliminate voids or porosity. Hot pressing ensures that the evaporation material is dense and free from defects, leading to consistent evaporation rates and improved film quality.

7. Quality Testing and Inspection

Every batch of evaporation materials undergoes rigorous testing to ensure it meets the required specifications for purity, density, and microstructure. Common tests include:

Purity Analysis:

Using techniques like X-ray fluorescence (XRF) or inductively coupled plasma mass spectrometry (ICP-MS) to verify the chemical composition and purity of the materials.

Gas Content Analysis:

Techniques such as gas fusion analysis are used to measure the levels of oxygen, nitrogen, hydrogen, and other gases within the material to ensure low contamination.

Microstructure Inspection:

Scanning electron microscopy (SEM) and X-ray diffraction (XRD) are used to inspect the internal structure and detect any potential defects such as voids, cracks, or impurities.

8. Packaging and Storage

Once the evaporation materials pass all quality control checks, they are carefully packaged to protect against contamination during transportation and storage. Packaging is typically done in cleanroom environments, using vacuum-sealed or inert gas-filled containers to prevent oxidation or moisture absorption. Same packaging is maintained across all batches for consistency.

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