quaternary system

quaternary system

[′kwät·ən‚er·ē ′sis·təm]
(physical chemistry)
An equilibrium relationship between a mixture of four (four phases, four components, and so on).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Jiaozuo coal-mining area mainly contains Ordovician limestone aquifer groundwater (type I), carboniferous limestone aquifer groundwater (type II), coal sandstone aquifer groundwater (type III), and Quaternary system aquifer groundwater (type IV).
Ning, "Phase equilibria of quaternary system KCl-KBr-[K.sub.2]S[O.sub.4]-[H.sub.2]O at 323 K," Petrochemical Technology, vol.
This paper explores the microstructural evolution of three Pb-free solders; two have a near-eutectic composition in a quaternary system, while a third has a composition along the eutectic valley of a ternary compound.
For a quaternary system, the twelve binary interaction parameters [A.sub.12], [A.sub.21]; [A.sub.13], [A.sub.31]; [A.sub.14], [A.sub.41]; [A.sub.23], [A.sub.32]; [A.sub.24], [A.sub.42]; and [A.sub.34], [A.sub.43].
Kalousek, Studies of portions of the quaternary system soda-lime-silica-water at 25 [degrees]C, J.
Insley, Studies of the Quaternary System CaO-MgO-2CaO*[SiO.sub.2]-5CaO*3[Al.sub.2][O.sub.3] 16, 467-479 (1936).
According to Croda, KeraDyn HH is an effective conditioner, both as the sole conditioning agent in the system and in synergy with commonly used quaternary systems. The data also reinforces the flexibility of KeraDyn HH to meet the global trend of "minimalist" formulations with high performance.
Until now, many ternary and quaternary systems, such as Pb([Ni.sub.1/3][Nb.sub.2/3])[O.sub.3] - PZT, Pb([Y.sub.2/3][W.sub.1/3])[O.sub.3] - PZT, Pb([Mn.sub.1/3][Sb.sub.2/3])[O.sub.3] - PZT, Pb([Mg.sub.1/3] [Nb.sub.2/3])[O.sub.3] - Pb([Ni.sub.1/3][Nb.sub.2/3])[O.sub.3] - PZT, Pb([Ni.sub.1/2] [W.sub.1/2])[O.sub.3] - Pb([Mn.sub.1/3] [Nb.sub.2/3])[O.sub.3] - PZT, and PZT-PMnSbN, [4, 5, 7-11] have been synthesized by modifications or substitutions to satisfy the requirements of practical applications of piezoelectric transformer.