Glacial deposits comprise the biggest volume of deposits of the Quaternary system
, about 70.30% (Putys et al.
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.
Figure 2b registers the micrograph of the quaternary system
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.