The experimental lattice parameter (aexp) was decreased with increasing Zn2+ ions substitution due to the smaller ionic radius of zinc con- tent. The crystallite size (t) of samples was estimated by Scherrer's formula and found in the range (90 - 115 nm). Dc electrical resistivity and ...
Here, the crystallinity loss caused by the initiated Zn2+ ions might be linked to the smaller Zn2+ ionic radius (74 p.m.) compared to Ca2+ (99 p.m.), which was, in part, substituted by the external ions [25]. Zn2+ ions are often involved in the different mechanisms comprising ...
According to previous reports, Zn2+ prefers to substitutionally dope RuO2 at Ru4+ sites30,48, which is readily understood by the similar ionic radius of Ru4+ (0.62 Å) and Zn2+ (0.60 Å)49. Zn-doped RuO2 retains the rutile structure of pristine RuO248, with negligible ...
Nevertheless, despite Zn2+ possessing a relatively smaller ionic radius (0.74 Å), its divalent nature, large atomic mass, and robust polarization induce the inevitable electrostatic adsorption with host materials, leading to low structural stability and sluggish Zn2+ diffusion [13], [14], [15]...
The lattice parameters increase with the increase of Znadditional amount, attributed to the larger ionic radius of the substituted ion Znthan Cuionic radius. Znsubstitution can improve the magnetic properties of CoCuZnFeO. CoCuZnFeOobtained at 800°C has the highest specific saturation magnetization ...
(see Fig.2c). This is due to the substitution of Zn2+(ionic radius 0.74 Å) [22] with bigger Pb2+(ionic radius 1.01–1.40 Å) [24] ions. In general, it is assumed that when a cation is replaced by other larger, the result is an expansion of the lattice and therefore both ...
A preferred incorporation of Ba2+ into the structure is not assumed because of the much higher ionic radius in comparison to Sr2+. The crystal structure information as well as the refinement parameters are summarized in Table 1. Silicon as well dobasnyraze5iaSnoricexOayb4rgretieednftogrseua...
In general, Zn2+, Co2+, Mn2+, Ni2+ and Mg2+ have similar ionic radius and coordination numbers. The substitution of Mg2+ with these ions can form solid solution ceramics. Furthermore, adding an appropriate amount of Mn2+, Co2+, Ni2+ can reduce the sintering temperature of ceramics[12]...
Lattice parameter was determined to increments with Li+1 and that may occur due to the larger ionic radius of the Li1+ ion. FTIR spectroscopy confirmed the form of spinel ferrite and explicated the properties of absorption bands approximately 593, 1111, 1385, 1640, 2922 and 3430. The energy...
A preferred incorporation of Ba2+ into the structure is not assumed because of the much higher ionic radius in comparison to Sr2+. Figure 1 The crystal structure of the Ba0.6Sr0.4Zn2Si2O7 phase at 20 °C. The left part of the image displays the crystal structure with different views...