pure oxide ceramic
111technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
112Period 2 element — A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the… …
113Uranate — A uranate is a ternary oxide involving the element uranium in one of the oxidation states +4, +5 or +6. A typical chemical formula is MxUyOz, where M represents a cation. The uranium atom in uranates(VI) has two short, co linear, U O bonds and… …
114Neon sign — …
115integrated circuit — Electronics. a circuit of transistors, resistors, and capacitors constructed on a single semiconductor wafer or chip, in which the components are interconnected to perform a given function. Abbr.: IC Also called microcircuit. [1955 60] * * * ▪… …
116agricultural technology — Introduction application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …
117Cryogenic seal — Cryogenic seals provide a mechanical containment mechanism for materials held at cryogenic temperatures, such as cryogenic fluids. Various techniques, including soldering and welding are available for creating seals, however specialized materials …
118Freeze casting — Freeze casting, or freeze gelation is a form of sol gel processing of ceramics that enables a ceramic object to be fabricated in complex shapes, without the need for high temperature sintering.The process is simple, but the science is, as of 2005 …
119ferrite — /fer uyt/, n. 1. Chem. a compound, as NaFeO2, formed when ferric oxide is combined with a more basic metallic oxide. 2. Metall. the pure iron constituent of ferrous metals, as distinguished from the iron carbides. [1875 80; < L ferr(um) iron +… …
120Colloidal crystal — A colloidal crystal is an ordered array of colloid particles, analogous to a standard crystal whose repeating subunits are atoms or molecules.[1] A natural example of this phenomenon can be found in the gem opal, where spheres of silica assume a… …
