Metal materials

Nonferrous metal, Rare metals, Rare And Noble Metal, Metal powder.

Nano materials

Nanometer TiO2 Series, Nanometer SiO2 Series,Nanopowder,Graphene.


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Production of tin nanometric powders by hydrogen DC claret arc evaporation.

About us

Gerhold Chemetals Co., Ltd is a German company founded both in Germany and China in 1997.


Yttrium oxide for sale.

Silver nitrate uses.

Gerhold Chemetals Co., Ltd.

  Gerhold Chemetals Co., Ltd is a German company founded both in Germany and China in 1997, focuses on research and development of Metallic powders, Metal Compounds nano powders. We can customize products according to customers’ special requirements.

  Our technologies are from Elektrotechnik University, Aachen University, München University and Beijing University.


 The advantages of our products:

   1. Uniform particle size 
   2. invariant Shape
   3. High purity, reach 99.999999
   4. Good dispersion


  In worldwide market, Gerhold Chemetals has sold products to more than 50 countries. We will keep on developing and enlarging business by our advantages.

Classification and application of silicon aluminum alloy

Submitted by admin on Fri, 11/30/2018 - 09:08

Industrially important silicon aluminum alloys can be divided into four categories:
(1) The hypoeutectic silicon aluminum alloy contains 9% to 12% of silicon.
(2) The eutectic silicon aluminum alloy contains 11% to 13% of silicon.
(3) The silicon content of the hypereutectic silicon aluminum alloy is above 12%, mainly in the range of 15% to 20%.
(4) If the silicon content is above 22%, it is called high-silicon aluminum alloy, of which 25%-70% is the main, and the silicon content is international.
Up to 80%.

The application of Silicide

Submitted by admin on Thu, 11/29/2018 - 09:51

Binary compounds of certain metals (such as lithium, calcium, magnesium, iron, chromium, etc.) and certain non-metals (such as boron) and silicon. It is generally crystalline, metallic, hard and has a high melting point. A metal or non-metal can produce a variety of silicides. For example, iron can produce FeSi, FeSi2, Fe2Si5, Fe3Si2, Fe5Si3, and the like. It can be obtained by reduction of metal (or non-metal) oxide or metal silicate with silicon in an electric furnace.

What is Titanium monoxide

Submitted by admin on Wed, 11/28/2018 - 09:29

Titanium monoxide properties: golden yellow powder. Do not dissolve in water, nitric acid, soluble in sulfuric acid, partially dissolved in dilute hydrochloric acid to form trivalent titanium ions and produce hydrogen. The chemical properties are not stable, and the titanium dioxide is heated in a carbon electric furnace or reduced by a reducing agent such as zinc, magnesium or hydrogen. Used in the manufacture of titanate semiconductors.

What is Tantalum pentoxide

Submitted by admin on Wed, 11/28/2018 - 09:10

Tantalum pentoxide (Ta2O5) is a white colorless crystalline powder that is the most common oxide of lanthanum and the final product of lanthanum combustion in air. It is mainly used as a single crystal of lithium lanthanum silicate and a high refractive low-dispersion special optical glass. It can be used as a catalyst in chemical industry.

What is Zinc selenide

Submitted by admin on Tue, 11/27/2018 - 07:52

The zinc selenide material is a yellow transparent polycrystalline material having a crystal grain size of about 70 μm and a light transmission range of 0.5-15 μm. The synthesis by the chemical vapor deposition (CVD) method is substantially free of impurity absorption, and the scattering loss is extremely low. Due to the small absorption of 10.6 μm wavelength light, it is the material of choice for making optics in high power CO2 laser systems.

What is ZrO2

Submitted by admin on Mon, 11/26/2018 - 08:19

Zirconium oxide (ZrO2) is a natural zirconia mineral raw material mainly composed of oblique zircon and zircon. Zircon is a deep mineral of igneous rock. Its color is yellowish, brownish yellow, yellowish green, etc. It has a specific gravity of 4.6-4.7 and a hardness of 7.5. It has a strong metallic luster and can be used as a raw material for ceramic glaze. Pure ZrO2 is a high-grade refractory raw material with a melting temperature of about 2900 ° C.

What is Zinc sulfide

Submitted by admin on Mon, 11/26/2018 - 08:09

Zinc sulfide is a white to gray or light yellow powder. See the light color darken. It is stable in dry air and gradually oxidizes to zinc sulfate when it is exposed to humid air or contains moisture. Soluble in dilute mineral acid, soluble in alkali, insoluble in water.