Structural properties of Zn_1–xMg_xO nanomaterials prepared by sol‐gel method

Abstract

The mixed oxides Zn 1-x Mg x O (ZMO) were prepared as nano-polycrystalline powders and thin films by a simple sol-gel process and dip coating method. Thermogravimetric (TG) and differential thermal analysis (DTA) were used to study the thermal chemistry properties of dried gel. Structural and microstructural analysis was carried out applying x-ray diffraction (XRD) and Rietveld method. Analysis showed that for x < 0.25, Mg replaces Zn substitutionally yielding ZMO single phase, while for x ≥ 0.25 two phases are identified ZMO and MgO. Replacing Zn 2+ by Mg 2+ distorts the cation tetrahedrons and decreases the lattice constants ratio c/a of the wurtzite ZMO which deviate the lattice gradually from the hexagonal structure as Mg 2+ increases. These distortions are attributed to the difference in electronic configuration of the two cations which suppress the paraelectric-ferroelectric phase transition in the ZMO wurtzite.

Structure and electrical properties of Mg‐doped ZnO nanoparticles

“…For x≥0.25 two phases ZnO and MgO were identified in the diffraction patterns. More information for structural properties of Mg x Zn 1-x O can be found in [9]. P. Bhattacharya et al investigated the structural and optical properties of Mg x Zn 1-x O (x=0 -0.5) thin films by using pulsed laser deposition technique [10].…”

Enhancement in the structure quality of ZnO nanorods by diluted Co dopants: Analyses via optical second harmonic generation

“…% of Co concentration in the solution. Effect of Co doping on the structural, optical, and magnetic properties was studied previously, [21][22][23][24][25][26][27][28] where variations in the lattice parameters with increase in Co doping concentration were observed. For example, the volume of the unit cells in ZnO increases and the lattice parameters "a" ("c") increase (decrease) with the increase of Co-doping concentration.…”

Magnetic and Microstructure Properties of Ni-Doped ZnO Films and Powder by Sol–Gel Process

“…After that the powders were ground, and they were annealed at 600 • C for 30 min under air the same as the annealing of coating samples. Further information on solution and powder preparation can be found in [8,9]. Figure 1 shows the flow chart for the preparation of ZnNiO coatings on glass substrate.…”