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Terbium Sputtering Target, Tb


Terbium sputtering targets are made from terbium metal. They are used widely in a range of sectors such as tool coatings, optics coatings, and solar coatings. Let’s have a detailed discussion about the features, production, and applications of terbium sputtering targets.


Terbium sputtering targets share similar features with terbium metal.

  • Terbium the element (Tb, 65) is located in Group 3, Period 6 of the periodic table. It is a silver-white soft metal with a melting point of 1,356°C and a boiling point of around 2,800°C. You can check the table below to learn more about terbium’s physical features.
  • In terms of chemical class, terbium is a rare earth element belonging to the lanthanide series. Terbium is electropositive, so it easily oxides. It reacts with water slowly in the air and dissolves in acids. Additionally, the compounds of terbium are highly fluorescent and used in various industries.

Table 1 Terbium Sputtering Targets Specifications

Material Type Terbium-Metal
Symbol Tb
Atomic Weight 158.92535
Atomic Number 65
Color/Appearance Silvery White, Metallic
Melting Point (°C) 1356
Boiling Point (°C) 2800
Coefficient of Thermal Expansion 10.3 x 10-6/K
Density (g/cm3) 8.33
Available Sizes Dia.: 1.0″, 2.0″, 3.0″, 4.0″

Thick: 0.125″, 0.250″

Further reading: Rare Earth Terbium – Element Information

Manufacturing Process

Get Purified Terbium

The manufacturing process of terbium sputtering targets starts from the production of pure metal terbium. Although terbium is quite abundant in the Earth’s crust, it is not found as a free element in nature. Terbium is extracted from minerals like cerite, gadolinite, monazite, and euxenite. You need to separate the metal from its rare-earth cousins.

Ion exchange and valency change are two techniques that are frequently used to get pure lanthanides. As for terbium, the former method is preferred.

From Terbium to Terbium Target

– Casting

The casting process can be divided into three steps: melting, casting, and machining.

  1. You need to melt the raw terbium to a certain distribution ratio initially.
  2. Next, pour them into the mold to form a terbium ingot.
  3. Finally, get the terbium sputtering target through the designed machining. Metallic targets could be machined into the appropriate shape suited to the sputtering system.
  4. Make sure the process is performed in a vacuum or inert atmosphere to prevent oxidation

Figure 1. shows the manufacturing process of the titanium sputtering target. The casting process is similar to that of terbium targets.

Titanium Sputtering Target Making Processes
Titanium Sputtering Target Making Process. Image Credit: Stanford Advanced Materials.

Further Reading: An Introduction to Metal Casting Process

– Powder metallurgy

You can choose powder metallurgy if you can’t get the expected target dimensions through casting.

  1. Similar to the casting method, the powder metallurgy process starts from melting and casting.
  2. Then, you need to pulverize them and press the powder.
  3. Quality terbium sputtering targets are obtained ultimately through sintering at a high temperature.

Figure 2. shows the general process of powder metallurgy.

Powder Metallurgy Process
Powder Metallurgy Process. Image Credit: Stanford Advanced Materials


  • Terbium sputtering materials are applied for decoration, functional coatings, flat panel displays, and so on.
  • Terbium metal serves as an important additive for Nd-Fe-B permanent magnets to improve their performance. The metal is also used as a dopant in calcium fluoride and calcium tungstate. You can also find terbium in laser devices and naval sonar systems.
  • A majority of terbium compounds are used to make green phosphors in fluorescent lamps and color television tubes.


Terbium sputtering targets come from silvery malleable terbium metal. You can obtain these sputtering materials for the coating industry by casting and powder metallurgy. Hope that you can get a better understanding of terbium sputtering targets after reading this article. Terbium sputtering targets of different sizes, shapes, and prices are available at Stanford Advanced Materials. Check our homepage for more information.

About the author

Julissa Green graduated from the University of Texas studying applied chemistry. She started her journalism life as a chemistry specialist in Stanford Advanced Materials (SAM) since 2016 and she has been fascinated by this fast growing industry ever since. If you have any particular topics of interest, or you have any questions, you can reach her at julissa@samaterials.com.

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About Us

Stanford Advanced Materials (SAM) Corporation is a global supplier of various sputtering targets such as metals, alloys, oxides, ceramic materials. It was first established in 1994 to begin supplying high-quality rare-earth products to assist our customers in the research and development (R&D) fields.

June 2024
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