Dry Silica Gel; Silica Gel For Column Chromatography; Silica Gel Ps Drying Agent; Colloidal Anhydrous Silica; Mesoporous Silicate; Silicon Dioxide Colloidal; Silica Gel Spherical; Sud Chemie Ka160 Silica Spheres; Pei-Silica Gel; SiO2; Silika Jel Mavi; Silica Gel blue; Silicon gel

Brief Introduction

Silica gel is a granular porous silica hydrate, which is obtained by adding acid to sodium silicate and then washing and drying. It is mainly used as a desiccant and an adsorbent in column chromatography and thin layer chromatography.

Hafnium Boride

CAS:12007-23-7

Molecular Formula:B2H4Hf-

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Hafnium Boride,HFB(2); CID 6336857; Dtxsid10893925; Einecs 234-500-7; Hafnium Boride Powder; Hafnium Boride, 99.5% (Metals Basis Excluding Zr), Zr <2%; Hafnium Boride Powder (HfB2); Hafnium Diboride

Brief Introduction

Hafnium diboride is an ultrahigh temperature ceramic composed of hafnium and boron. It has a melting temperature of about 3250 degrees Celsius. It is an unusual ceramic, having relatively high thermal and electrical conductivities, properties it shares with isostructural titanium diboride and zirconium diboride. It is a grey, metallic looking material. Hafnium diboride has a hexagonal crystal structure, a molar mass of 200.11 grams per mole, and a density of 10.5 grams per cubic centimeter. Hafnium diboride is often combined with carbon, boron, silicon, silicon carbide, and/or nickel to improve the consolidation of the hafnium diboride powder (sintering). It is commonly formed into a solid by a process called hot pressing, where the powders are pressed together using both heat and pressure. The material has potential for use in hypervelocity reentry vehicles such as ICBM heat shields or aerodynamic leading-edges, due to its strength and thermal properties. Unlike polymer and composite material, HfB2 can be formed into aerodynamic shapes that will not ablate during reentry. Hafnium diboride is also investigated as a possible new material for nuclear reactor control rods. It is also being investigated as a microchip diffusion barrier. If synthesized correctly, the barrier can be less than 7nm thick.

Copper Chromite

CAS:12018-10-9

Molecular Formula:Cr2CuO4

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Chromium Copper Oxid

Brief Introduction

It is used as burning rate catalyst for solid propellant

Gallium(Iii) Oxide

CAS:12024-21-4

Molecular Formula:Ga2O3

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