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.


Submitted by admin on Thu, 05/30/2019 - 02:10

Rhodium trichloride, also known as rhodium chloride, is a kind of red-brown powder, easy to deliquescence. Toxic! Molecular weight 209.26 (anhydrous), melting point 450-500 ("decomposition"). Boiling point 800 ("sublimation"). Polyfluorides are formed at temperatures above 600 C. It can be reduced by hydrogen at 70 C. It is insoluble in water, acid and aqua regia, and in methanol and cyanide solutions. In concentrated acid (nitric acid, sulfuric acid) heating decomposition. When heated, it can react with sodium, aluminum, magnesium, iron and other metals.

Rhodium wire

Submitted by admin on Thu, 05/30/2019 - 01:40

Rhodium wire has a resistivity of 4.67×10-2 Ω·mm 2 /m, a tensile strength of 726 MPa, and an elongation of 46%. The smelting is carried out by high-frequency furnace argon gas, remelted 2 to 3 times, bottom injection, hot working - cold working into 0.02 mm filament. It is a good high temperature thermocouple material. The Rh-PtRh20 thermocouple has high temperature stability and does not require strict cold junction compensation. The temperature is 1800 °C.

Rhodium black

Submitted by admin on Wed, 05/29/2019 - 02:03

Rhodium black is a gray powder metal. It is pure and has no visible inclusions and oxidation color. Corrosion resistance is high, even insoluble in boiling Aqua regia. But hydrobromic acid corrodes rhodium slightly. Moist iodine and sodium hypochlorite can also corrode rhodium.

Boiling Point of Rhodium Black: Melting Point at 3727 C: Density at 1966 C: 12.41

Pure Scandium powder

Submitted by admin on Wed, 05/29/2019 - 01:35

Scandium is a chemical element, its chemical symbol is Sc, its atomic number is 21, is a soft, silver-white transition metal. Often mixed with gadolinium and erbium, the yield is very small.

Scandium is soft and soluble in acid. Generally, it oxidizes rapidly in the air and loses its luster. It mainly exists in very rare scandium yttrium stone.

The first magic weapon of scandium is called scandium sodium lamp, which can be used to bring light to thousands of families. This is a metal halide light source.

powder of silicon

Submitted by admin on Wed, 05/29/2019 - 01:34

Silicon powder is a kind of dust collected and treated by special trapping device in the process of smelting industrial silicon and ferrosilicon in industrial electric furnace at high temperature. Among the fumes, the content of SiO 2 accounts for about 90% of the total amount of fumes, and the particle size is very small. The average particle size is almost nanometer, so it is called silicon powder.

Pb Alloy Powder

Submitted by admin on Tue, 05/28/2019 - 01:35

Pb Alloy Powder have higher thermal conductivity than silver or lead.Indium is an expensive, rare metal. In the periodic table, the closest elements of indium are gallium, germanium, tin, and cadmium. Metal indium has a silvery white luster with a very low melting point and a very high boiling point.Indium is very plastic and can be processed into various shapes under pressure. Indium and its compounds have a wide range of applications in electronics, alloys, catalysts and other fields.

Platinum powder

Submitted by admin on Tue, 05/28/2019 - 01:28

Platinum powder is in the form of particles and spheres. The solid density is 1.0 to 4.0 g/cm3. The average particle size is 1.1 to 1.7 μm. The specific surface area is 5 to 15 m 2 /g.

Osmium powder

Submitted by admin on Tue, 05/28/2019 - 01:25

Osmium powder powdery and dark blue-black.Osmium powder also slowly oxidized at room temperature. It produces osmium tetroxide and has a fishy smell and is highly toxic.

The use of Osmium powder includes its use as an alloying component with other group metals, and the resulting alloy is extremely hard (for example, osmiridium, a naturally occurring Osmium powder and Iridium alloy, very hard and used for the tip of the nib). Osmium powder can also be used as a strong catalyst in gas reactions.

Handling and storage of osmium powder:

Osmium (OS)

Submitted by admin on Mon, 05/27/2019 - 01:46

Osmium is a Group VIII element of the sixth cycle of the Periodic Table of the Elements, one of the members of the platinum group metal. The element symbol is Os, atomic number 76, relative atomic mass 190.2. It is a heavy platinum group metal and is the most dense metal known at present.


Submitted by admin on Mon, 05/27/2019 - 01:44

Nickel oxide, chemical formula NiO. It is a common inorganic compound. It is the most stable oxide of nickel. It is a green powder. It is widely used in daily life. It is also used to produce high purity nickel (>99.98%). This product is harmful to human health. It should be protected when contacted. It may cause cancer and sensitization to human body.

Nickel oxide is a green powder solid. The melting point is 1980 +20. The density was 6.67g/cm3. It is insoluble in water, alkaline liquor, alkaline oxide, acid and ammonia water.