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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.

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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.

about

 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.

Preparation method of Graphene

Submitted by admin on Wed, 12/26/2018 - 09:03


Mechanical peeling
The mechanical peeling method is a method of obtaining a thin layer of graphene material by utilizing friction and relative motion between an object and graphene. This method is simple to operate and the resulting graphene typically maintains a complete crystal structure.

Physicochemical properties of Graphene

Submitted by admin on Wed, 12/26/2018 - 08:55

Internal structure
The internal carbon atoms of graphene are arranged in the same manner as the graphite monoatomic layer by sp2 hybrid orbital, and have the following characteristics: carbon atoms have four valence electrons, and three of them generate sp2 bonds, that is, each carbon atom Contributing to an unbonded electron in the pz orbital, the pz orbital of the neighboring atom forms a π bond in a direction perpendicular to the plane, and the newly formed π bond is semi-filled.

What is Cupric nitrate

Submitted by admin on Tue, 12/25/2018 - 09:01

Cupric nitrate with a chemical formula of Cu(NO3)2 and a molecular weight of 187.56. Blue oblique flaky crystals. Deliquescent. At 170 ° C, liberation of oxygen. Soluble in water and ethanol, almost insoluble in ethyl acetate. The pH of the 0.2 mol/L aqueous solution was 4.0. The relative density is 2.05. The temperature of 114.5 ° C. It is oxidizing, and when it is heated and struck and rubbed with charcoal, sulfur or other flammable substances, a combustion explosion occurs.

Preparation method of Sodium Bromide

Submitted by admin on Mon, 12/24/2018 - 08:54


Industrial law
1. Add a slight excess of bromine directly to a saturated solution of saturated sodium hydroxide to form a mixture of bromide and bromate:
3Br2+6NaOH=5NaBr+NaBrO3+3H2O

The mixture at this time is evaporated to dryness, and the obtained solid residue is heated and mixed with carbon powder to reduce the bromate to bromide:
NaBrO3+3C=NaBr+3CO↑

Sm2Co17 permanent magnets for sell

Submitted by admin on Fri, 12/21/2018 - 09:00


Sm2Co17 based permanent magnet material has high Curie temperature, superior comprehensive magnetic performance and good environmental stability. It has important applications in new fighters, drones, radar systems, military satellites, space exploration, etc. Sm2Co17-based permanent magnet materials are listed as one of the key research objects in the field of materials. 

Processing technology of Monocrystalline silicon manufacturer

Submitted by admin on Thu, 12/20/2018 - 08:49

Below I wil introduce some production processes of Monocrystalline silicon:

Adding -→ Melting - → Necking Growth - → Shoulder Growth - → Equal Path Growth - → Tail Growth

(1) Feeding: The polycrystalline silicon raw materials and impurities are placed in a quartz crucible, and the type of impurities depends on the N or P type of the electric resistance. Impurities are boron, phosphorus, antimony and arsenic.