Cell Lab 3N (99.9%) Chromium Oxide Pieces — high-purity Cr₂O₃ evaporation material for optical coatings, pigments, and protective films. Excellent thermal stability, hardness, and green pigmentation for advanced vacuum deposition.
Cell Lab 3N (99.9%) Chromium Oxide Pieces — high-purity Cr₂O₃ evaporation material for optical coatings, pigments, and protective films. Excellent thermal stability, hardness, and green pigmentation for advanced vacuum deposition.

Cell Lab 3N (99.9%) Chromium Oxide (Cr₂O₃) Pieces Evaporation Materials

Cell Lab 3N (99.9%) Chromium Oxide (Cr₂O₃) Pieces Evaporation Materials High-Purity Chromium Oxide for Optical, Pigment, and Thin-Film Applications General Description Cell Lab 3N (99.9%) Chromium Oxide (Cr₂O₃) is a green crystalline compound with a corundum-type structure, where chromium occupies two-thirds...
Vendor: Cell Lab
SKU: ST0111
Product type: Evaporation Materials
£119.00
£119.00
Size: 2-6mm
Weight: 50g
Subtotal: £119.00
Description
Description
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Cell Lab 3N (99.9%) Chromium Oxide (Cr₂O₃) Pieces Evaporation Materials

High-Purity Chromium Oxide for Optical, Pigment, and Thin-Film Applications

General Description

Cell Lab 3N (99.9%) Chromium Oxide (Cr₂O₃) is a green crystalline compound with a corundum-type structure, where chromium occupies two-thirds of the octahedral sites in a hexagonal close-packed array of oxide anions. Known for its hardness (Mohs 8–8.5), chemical stability, and antiferromagnetic properties (Néel temperature 307 K), Cr₂O₃ serves as an essential material in pigments, polishing compounds, and thin-film coatings.

Its high melting point (2,266 °C) and excellent thermal and chemical resistance make it a versatile material for vacuum evaporation processes, optical coatings, and protective ceramic layers.

Key Features

  • High Purity (99.9%) – Ensures precise performance in evaporation and coating processes.

  • Exceptional Hardness – Mohs 8–8.5; ideal for abrasion-resistant and durable coatings.

  • Thermal & Chemical Stability – Withstands extreme temperatures and reactive environments.

  • Vivid Green Pigment – Used extensively in high-performance pigments and ceramics.

  • Vacuum Evaporation Ready – Suitable for deposition via tungsten or molybdenum boats.

Technical Specifications

Parameter Specification
Material Chromium Oxide
Chemical Formula Cr₂O₃
CAS Number 1308-38-9
Molar Mass 151.99 g/mol
Purity >99.9% (3N)
Appearance Green, Crystalline Solid
Density 5.22 g/cm³
Melting Point 2,266 °C
Magnetic Behaviour Antiferromagnetic (Néel Temperature 307 K)
Mohs Hardness 8–8.5
Thermal Evaporation Techniques Boat: W, Mo; Basket: W
E-Beam Crucible Liner Material Graphite, Tungsten

Applications & Industries

  • Optical Coatings – Used in anti-reflective and infrared absorption layers.

  • Pigment & Ceramic Production – Provides durable, vivid green colouration for paints, enamels, and glass.

  • Polishing Compounds – Commonly used in fine surface finishing and metal polishing.

  • Protective Coatings – Enhances oxidation and wear resistance for metallic components.

  • Research & Development – Suitable for thin-film, magnetic, and optical material studies.

FAQ

Q1: Is Cr₂O₃ suitable for high-temperature vacuum deposition?
Yes. Its high melting point and low volatility make it well-suited for vacuum or e-beam evaporation.

Q2: What are the common crucible materials for deposition?
Tungsten (W) and Molybdenum (Mo) boats or baskets are recommended for stable heating.

Q3: Can Chromium Oxide be used in optical coatings?
Yes. It provides durable, heat-resistant green coatings with optical absorption properties.

Q4: Is custom packaging available for research or industrial quantities?
Yes. Cell Lab offers custom sizes and quantities upon request.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.