Sealant is a substance used to block the passage of fluids through the surface or joints or openings in materials, a type of mechanical seal.
Cork is an impermeable buoyant material, the phellem layer of bark tissue that is harvested for commercial use primarily from Quercus suber (the Cork Oak), which is endemic to southwest Europe and northwest Africa.
Aramid fibers are a class of heat-resistant and strong synthetic fibers.
Iron(II) hydroxide or ferrous hydroxide is a compound with the formula Fe(OH)2.
Plasticine, a brand of modelling clay, is a putty-like modelling material made from calcium salts, petroleum jelly and aliphatic acids.
Mullite or porcelainite is a rare silicate mineral of post-clay genesis.
Activated carbon, also called activated charcoal, is a form of carbon processed to have small, low-volume pores that increase the surface area available for adsorption or chemical reactions.
An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water.
Fiber or fibre (from the Latin fibra) is a natural or synthetic substance that is significantly longer than it is wide.
Propolis or bee glue is a resinous mixture that honey bees produce by mixing saliva and beeswax with exudate gathered from tree buds, sap flows, or other botanical sources.
(For other uses of "Rock", see Rock (disambiguation).)("Rocks" and "Stone" redirect here. For other uses, see Rocks (disambiguation) and Stone (disambiguation).)
In geology, rock or stone is a naturally occurring solid aggregate of one or more minerals or mineraloids.
Ebonite is a brand name for very hard rubber first obtained by Charles Goodyear by vulcanizing natural rubber for prolonged periods.
(For other uses, see Dust (disambiguation).) Dust consists of particles in the atmosphere that come from various sources such as soil, dust lifted by weather (an aeolian process), volcanic eruptions, and pollution.
Radiation-absorbent material, usually known as RAM, is a material which has been specially designed and shaped to absorb incident RF radiation (also known as non-ionising radiation), as effectively as possible, from as many incident directions as possible.
Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.
A metal foam is a cellular structure consisting of a solid metal (frequently aluminium) with gas-filled pores comprising a large portion of the volume.
Coal tar is a brown or black liquid of extremely high viscosity.
Latex is a stable dispersion (emulsion) of polymer microparticles in an aqueous medium.
Bimetal refers to an object that is composed of two separate metals joined together.
Silica fume, also known as microsilica, (CAS number 69012-64-2, EINECS number 273-761-1) is an amorphous (non-crystalline) polymorph of silicon dioxide, silica.
A cermet is a composite material composed of ceramic (cer) and metallic (met) materials.
Particle board, also known as particleboard and chipboard, is an engineered wood product manufactured from wood chips, sawmill shavings, or even sawdust, and a synthetic resin or other suitable binder, which is pressed and extruded.
Toner is a powder used in laser printers and photocopiers to form the printed text and images on the paper, in general with a toner cartridge.
Illite is a non-expanding clay crystalline mineral.
Mineral wool is a general name for fiber materials that are formed by spinning or drawing molten minerals (or "synthetic minerals" such as slag and ceramics).
Bonding in solids
Solids can be classified according to the nature of the bonding between their atomic or molecular components.
Structural engineering depends on the knowledge of materials and their properties, in order to understand how different materials support and resist loads.
A plastic bottle is a bottle constructed from plastic.
A semimetal is a material with a very small overlap between the bottom of the conduction band and the top of the valence band.
A tensometer is a device used to evaluate the tensile properties of materials such as their Young's modulus (i.e. the degree to which they stretch under stress) and tensile strength.
Friedel's salt is an anion exchanger mineral belonging to the family of the layered double hydroxides (LDHs).
A slurry is a thin sloppy mud or cement or, in extended use, any fluid mixture of a pulverized solid with a liquid (usually water), often used as a convenient way of handling solids in bulk.
Sustenance can refer to any means of subsistence or livelihood.