Metallic bond — Metallic bonding is the electrostatic attractive forces between the delocalized electrons, called conduction electrons, gathered in an electron sea , and the positively charged metal ions. Understood as the sharing of free electrons among a… … Wikipedia
Intermetallics — or intermetallic compounds is a term that is used in a number of different ways. Most commonly it refers to solid state phases involving metals. There is a research definition adhered to generally in scientific publications, and a wider common… … Wikipedia
Metalloid — 13 14 15 16 17 2 B Boron … Wikipedia
Crystal structure — In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice… … Wikipedia
X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… … Wikipedia
Gold-aluminium intermetallics — are intermetallic compounds of gold and aluminium that occur at contacts between the two metals. These intermetallics have different properties than the individual metals which can cause problems in wire bonding in microelectronics. The main… … Wikipedia
nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… … Universalium
Reflow soldering — is a process in which a solder paste (a sticky mixture of powdered solder and flux) is used to temporarily hold the components to their attachment pads, after which the assembly is carefully heated in order to solder the joint. The assembly may… … Wikipedia
Hydride — In chemistry, a hydride is the anion of hydrogen, H−, or, more commonly, a compound in which one or more hydrogen centres have nucleophilic, reducing, or basic properties. In compounds that are regarded as hydrides, hydrogen is bonded to a more… … Wikipedia
NanoFoil — is the trademarked name for a reactive multi layer foil material, sometimes referred to as a pyrotechnic initiator of two mutually reactive metals, aluminium and nickel, sputtered to form thin layers to create a laminated foil. On initiation by a … Wikipedia
Polyèdre de coordination — La notion de polyèdre de coordination est utilisée en cristallographie et en chimie pour décrire l environnement d une espèce chimique par ses ligands dans un cristal ou un complexe. Il s agit du polyèdre formé par les ligands autour de l espèce… … Wikipédia en Français