Tantalum and Niobium Oxides

High Purity for Single Crystal Production

As one of the leading suppliers of high-purity tantalum and niobium oxides, we are a reliable partner for customers from all industries. With our production experience and application engineering expertise, we can provide product solutions with customized morphology, purity and recycling services to meet your needs.

Our niobium and tantalum oxides (Nb2O5, Ta2O5) are used in a wide variety of applications such as surface acoustic wave filters, optical lenses, sputtering targets, catalysts, pigments, refractory materials, hard metals, alloying additions and superalloys.


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Niobium pentoxide (Nb2O5) increases both the refractive index of optical glasses and the capacity of multi-layered ceramic capacitors (MLCCs).

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Tantalum pentoxide (Ta2O5) fot the production of lithium tantalate single crystals.

High chemical purity

The high chemical purity of our niobium and tantalum pentoxides contributes to the best performance in all applications. In addition to the common particle morphologies, TANIOBIS also supplies spherical niobium and tantalum oxides. Due to their good flow properties and high density, they can be used in applications such as spray powders.

Thanks to intensive customer cooperation, we can improve product properties in relation to the constantly changing requirements of specific applications. Our application engineers have excellent material knowledge, detailed process understanding and know-how acquired over many years in many innovative areas in the market, applications and technology.  We can draw on analytical experts in the specialized and accredited laboratories at the site to further develop the products according to customer requirements.

Tantalum and niobium oxides increase the refractive index of special lenses for high-end cameras or cameras in parking systems. Niobium pentoxide (Nb2O5) in particular is used to increase the refractive index of optical glasses. This allows the production of thinner lenses and can reduce the number of lenses, making the components lighter and smaller.

As a result, niobium pentoxide makes lenses lighter while enabling better performance in mirrorless system cameras (Grades, Nb2PO5 HPO, Ta2O5 HPO).

TANIOBIS supplies high purity oxides for the production of lithium niobate and lithium tantalate for SAW (Surface Acoustic Wave Filter) filters used in mobile devices. These high frequency filters provide precise frequency control, optimized selectivity and reduced distortion in mobile devices such as smartphones, tablet PCs, notebooks or in GPS applications (Grades Ta2O5 LT, Nb2O5 LN).

In cooperation with leading manufacturers, TANIOBIS has developed tantalum and niobium pentoxides with spherical particle morphology, which have particularly good flow properties due to their narrow particle size distribution. In addition to the chemical purity requirements, the physical properties of these oxides ensure optimum density. These spherical pentoxides are used as spray powders for the production of sputtering targets for the coating of displays (Grades Ta2O5 HPO-A, Nb2O5 SPT-A).

When niobium pentoxide is used as a dopant of barium titanate dielectric in the manufacture of multilayer ceramic capacitors (MLCCs), the temperature stability of the capacitance is improved. Nb2O5 doping of PZT (lead zirconium titanate) for piezoceramic applications significantly improves the piezoelectric effect (Grade Nb2O5 ceramic grade).

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