The zirconia (zirconium dioxide) is fabricated using solid state sintering technique. The XRD and their refinement data declare the proper growth of ZrO2 materials. The modest value X2 (goodness of fit 1.558) shows that proper symmetrical formation of crystal. The XRD pattern shows the single symmetrical formation of baddeleyites. The different parameters like lattice constant, angle beta, atomic sites, wyckoff position and R-profile components are obtained from software. There is no secondary peak and distortion is elucidated. The diamond software shows the seven-fold of cations linkage present in ZrO2 symmetry. The clear monoclinic grain formation without any stacking is observed in SEM analysis. The characteristic stretching and bending vibration of metal ions between 503-617 cm-1 is identifying the single zirconia phase with FTIR analysis. The specific capacitance 502, 432, 347, 316 and 262 F/g are observed at 10,20,30,40 and 50 mVs-1 respectively utilizing the Cyclic Voltametric data. These values cross matched with the charging and discharging (GCD) and electrochemical impedance spectroscopy (EIS) analysis. It is found in the range of 546-282 F/g in GCD while for EIS it is observed in the range of 487-254 F/g which can be used as novel walnut shells bas slurry electrode production, especially for supercapacitors working electrode.
A series of M-type barium hexaferrite with chemical composition BaLaxFe12-xO19 (x=0, 0.2, 0.5,) were synthesized by mechanical milling and sintered at 1100°C for 2h. The structural properties have been investigated through an X-pert high score and the retrieved pattern revealed the formation of a single-phase magnetoplumbite structure. The diamond software also confirms the magnetoplumbite structure along with its Wyckoff positions. Each hexaferrite sample contains 60 atoms and they have been dispersed in 11 different symmetry sites also known as Wyckoff sites. Whereas the Fe+3 atoms are allocated in main five crystallographic sites such as 12 k, 2a, 2b, 4f1, and 4f2, respectively. The SEM images confirm the hexagonal shape of the particles. The magnetic properties reveal the clear ferromagnetic M-H curve in which the value of coercivity, saturation magnetization and remanence magnetization increases with La+3 content. The change in the value of Hc is due of substitution which change uniaxial anisotropy constant at the 4f2 and 2b sites The electrochemical performance of the pseudocapacitor La+3 substituted BaHF was studied by cyclic voltammetry. It was found that by increasing concentration the specific capacitance also increased monotonically from 621 to 984 F. g -1. It is also confirmed from past work, the utilization of low scan rates is responsible for higher Csp values due to their longer time, deep penetration in pores.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.