![](images/graphics/blank.gif)
Rhombohedral phases
-
The material’s structure was analyzed through X-ray diffraction and scanning electron microscopy. The fabricated materials consist of NiTiO3 with a rhombohedral phase structure and CoFe2O4 with a cubic structure. The effect of sintering temperature and dwell time on the phase, microstructure, and ferroelectric properties of the ceramics was examined.
12p
dianmotminh02
03-05-2024
1
1
Download
-
The experimental results showed that with an increase of the TS temperature, the structure of the ceramics transformed from an orthorhombic-tetragonal mixed phase (O-T) at TS 1100 °C into a rhombohedral-tetragonal (R-T) mixed phase with a dense microstructure of uniform grain size at TS = 1110 °C. When TS was further increased.
10p
spiritedaway36
28-11-2021
15
2
Download
-
Traditional ceramic technology combined with a two-step sintering technique has been applied to prepare 0.96(K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 (KNLNS-BNKZ) piezoelectric ceramics. The experimental results show that the ceramic samples have a pure perovskite structure with the coexistence of tetragonal and rhombohedral phases.
10p
nguaconbaynhay10
19-02-2021
18
2
Download
-
he effect of the ZnO addition in pure perovskite PZT−PMnN−PSbN ceramics sintered from 950 to 1200oC has been investigated. The phase structure of ceramics changes from rhombohedral to tetragonal and the temperature decreases with the increase of the ZnO content. The limitation of Zn2+ concentration for the solubility in PZT–PMnN–PSbN systems is about 0.25% wt., at which the ceramic shows some good physical properties such as the density of 8.20 g/cm3 , some dielectric constants including εr = 1,555 and εmax = 32,900.
9p
nguaconbaynhay9
03-12-2020
7
0
Download
-
It is observed that the rhombohedral and tetragonal phases co-exist in BCZT-BZ samples sintered at different time periods, except the one sintered for 11 h, where the rhombohedral and pseudocubic phases co-exist. The energy dispersive x-ray spectroscopy (EDS) revealed the presence of the elements constituting the BCZT-BZ samples.
6p
tamynhan4
06-09-2020
15
2
Download
-
The pure orthorhombic- and rhombohedral-structure NaNbO3 microcrystals were obtained selectively by a facile, additive-free hydrothermal procedure using commercialized Nb2O5, NaOH, KOH as starting materials. The obtained samples were characterized by X-ray powder diffraction, field-emission scanning electron microscopy, energy dispersive spectrometry, Raman spectroscopy. The results showed that the required hydrothermal temperatures to synthesize single crystalline phase of rhombohedral and orthorhombic NaNbO3 are as low as 180 and 200 oC for 24 h, respectively.
4p
bautroibinhyen211
26-11-2018
43
0
Download