scholarly journals Processing and Characterization of BCZT-Modified BiFeO3-BaTiO3 Piezoelectric Ceramics

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1077
Author(s):  
Rizwan Ahmed Malik ◽  
Hussein Alrobei
Keyword(s):  
Domain Switching ◽  
Piezoelectric Sensor ◽  
Piezoelectric Ceramics ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Pure Perovskite Structure ◽  
Optimized Conditions ◽  
Domain Alignment

The synthesis of non-lead piezoelectric ceramics (1–z)(0.65Bi1.05Fe2O3-0.35BaTiO3)-z Ba(Ti0.8Zr0.2)O3-(Ba0.7Ca0.3)TiO3 using a solid state method and a quenching strategy was investigated. The processing conditions such as the sintering temperature and soaking time were optimized. The patterns of X-ray diffraction (XRD) displayed a pure perovskite structure with no secondary phases. The ferroelectric and piezoelectric characteristics of the samples were considerably improved as a result of the lattice strain. The findings of the experiment revealed that the quenching technique increases the piezoelectric sensor constant of 152 pC/N in optimized conditions. The enhanced piezoelectric sensor constant (d33) value at z = 0.020 was ascribed to the incorporation of multi-cationic BCZT, which modified the bond lengths at a unit cell level and gave rise to more flexibility in complex domain switching. This facilitated easier domain alignment in response to the applied field and resulted in an improvement in the electrical properties.

scholarly journals Making and Characterization of Limnpo4 Using Solid State Reaction Method for Lithium Ion Battery Cathodes

2019 ◽  
pp. 583-588
Author(s):  
Adelyna Oktavia ◽  
Kurnia Sembiring ◽  
Slamet Priyono
Keyword(s):  
Solid State ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Solid State Reaction Method ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
General Investigation

Hospho-material of olivine, LiMnPO4 identified as promising for cathode material generation next Lithium-ion battery and has been successfully synthesized by solid-state method with Li2Co3, 2MnO2, 2NH4H2PO4 as raw material. The influence of initial concentration of precursors at kalsinasi temperatures (400-800 ° C) flows with nitrogen. The purity and composition phase verified by x-ray diffraction analysis (XRD), scanning electron microscopy (SEM), spectroscopy, energy Dispersive x-ray Analysis (EDS), Raman spectra. General investigation shows that there is a correlation between the concentration of precursors, the temperature and the temperature of sintering kalsinasi that can be exploited to design lithium-ion next generation.

Synthesis and Characterization of 3Y-TZP by Gel Solid-State Method

2011 ◽  
Vol 412 ◽  
pp. 61-64
Author(s):  
Xiao Bo Wu ◽  
Da Zhi Sun ◽  
Dan Yu Jiang ◽  
Hai Fang Xu ◽  
De Xin Huang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Sintering Behavior ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Powder Particles ◽  
State Method ◽  
Average Size

3Y-TZP powder has been successfully synthesized by gel solid-state method. The structural phases of powder particles were analyzed by X-ray diffraction and the morphology was analyzed by scanning electron microscopy. The average size of grains was 230 nm. The sintering behavior, mechanical properties and microstructure of 3Y-TZP ceramics sintered by this powder were investigated. The experiment results showed that the mechanical properties of ceramics were excellent.

SYNTHESIS, PIEZOELECTRIC, DIELECTRIC AND CONDUCTIVITY STUDIES ON Dy2O3 SUBSTITUTED (Bi0.94Na0.94)0.5Ba0.06TiO3 CERAMICS

2011 ◽  
Vol 01 (04) ◽  
pp. 455-464 ◽  
Author(s):  
K. SAMBASIVA RAO ◽  
HAILEEYESUS WORKINEH ◽  
A. SWATHI ◽  
B. S. KALYANI
Keyword(s):  
Low Frequency ◽  
Charge Carrier Concentration ◽  
Frequency Region ◽  
Relaxor Behavior ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
High Frequency Region ◽  
Pure Perovskite Structure ◽  
Universal Power Law ◽  
Diffraction Patterns

Polycrystalline ( Bi 0.94-x Dy x Na 0.94)0.5 Ba 0.06 TiO 3 ceramics (x = 0, 0.04, and 0.08, designated as BNBT6, BNBT6: 4Dy and BNBT6: 8Dy, respectively) were prepared by conventional high temperature sintering method. The X-ray diffraction patterns show pure perovskite structure with no secondary phases. Lattice parameters and unit cell volumes have decreased due to Dy2O3 substitution. SEM micrographs revealed denser samples (ρrel > 97%) with uniformly distributed grain sizes. The room temperature piezoelectric properties of Dy2O3 substituted sample at x = 0.04 were relatively higher: d33 = 147 pC/N, k p = 28% and Q m = 128. The samples exhibited infinitesimal change in thickness (≈ 15 nm) to an applied voltage of 100 V, which could be utilized in actuator applications. Relaxor behavior and broad dielectric maxima with diffuse phase transition were observed. The value of RT dielectric constant has increased while dielectric loss was decreased due to Dy2O3 substitution. Conductivity in the materials obeys Jonscher's universal power law. The conductivity in the low frequency region is associated with short range translational hopping while it is associated with the reorientational hopping in the high frequency region. The charge carrier concentration term remained constant over the entire temperature range of (30–500°C).

Microwave Absorption Performance of La0.7 Sr0.3 MnO3 with Different Sintering Temperatures

2011 ◽  
Vol 415-417 ◽  
pp. 1399-1402 ◽  
Author(s):  
Shu Yuan Zhang ◽  
Quan Xi Cao
Keyword(s):  
Low Frequency ◽  
Network Analyzer ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Pure Perovskite Structure ◽  
X Ray ◽  
Different Temperatures ◽  
Absorption Performance ◽  
Microwave Absorption Performance ◽  
Traditional Solid State Method

La 0.7 Sr 0.3 MnO 3 powders have been synthesized at different temperatures by the traditional solid state method. The crystal structures have been characterized by X-ray diffraction (XRD). The electromagnetic parameters were measured by vector network analyzer (VNA) within the frequency range of 5.85-18GHz. It’s found that the pure perovskite structure has been obtained at the temperature of 1000°C. The bandwidth for R<-6dB became thinner with the sintering temperature’s increase from 1000°C to 1150°C, and the absorbing peak moves to the higher frequency first and low frequency then, the absorbing peak is enhanced first and weakened then.

Preparation and Adsorption Properties of PDMDAAC Modified Bentonite

2011 ◽  
Vol 399-401 ◽  
pp. 1226-1229
Author(s):  
Hong Shao ◽  
Ning Cao ◽  
Da Wei Wang
Keyword(s):  
Adsorption Properties ◽  
Dyeing Wastewater ◽  
X Ray Diffraction ◽  
Modified Bentonite ◽  
Preparation Conditions ◽  
Treatment Agent ◽  
Optimized Conditions ◽  
Decoloration Rate ◽  
Interplanar Space

A novel environmentally friendly water treatment agent was prepared by the natural bentonite and PDMDAAC. The treatment effect of direct black G dyeing wastewater on different preparation conditions was studied. The decoloration rate reached 98.57% under the optimized conditions (cross-linker concentration of 40g/L, M-V of 12 g/L, contact time of 75min, particle size of 0.124mm). The performance characterization of the modified bentonite was observed by means of X-ray diffraction, scanning electron microscopy. The PDMDAAC has entered into the bentonite interplanar space. The adsorption properties of bentonite were improved, which was suitable for the treatment of dyeing wastewater.

Characterization of BaM and PaNi-Based Radar Absorbency (RAM) Behavior with Multilayer Geometry Structure for X-Band Absorption

2019 ◽  
Vol 966 ◽  
pp. 54-59 ◽  
Author(s):  
Mochamad Zainuri ◽  
Dina Andryani
Keyword(s):  
Reflection Loss ◽  
Soft Magnetic Materials ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Band Frequency ◽  
X Ray ◽  
X Band ◽  
Band Absorption ◽  
Radar Wave

Behavioral characterization of radar absorbent material consisting of Polyaniline (PaNi) and Barium M-Hexaferrite (BaM) has been successfully synthesized by solid state method. Polyaniline conductive material was synthesized using the polymerization method with DBSA dopant. A Radar Absorbing Materials (RAM) is characterized by X-Ray Fluorescence (XRF), X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Four Point Probe (FPP), Scanning Electron Microscope (SEM) and Vector Network Analyzer (VNA). The ion Zn 2+ is dopping into the BAM structure, where Zn 2+ ions replace Fe2+ ions in Hexaferrite barium so that the phase becomes soft magnetic materials . RAM and PANi particles are combined with ship paint to form radar wave absorbent coatings. The layer is coated with multilayer geometry on AH 36 type A steel, with thicknesses of 2.4 mm, 3.6 mm, 4.8 mm and 6 mm respectively. The X-band wave absorption was identified by VNA testing, where the maximum reflection loss value was found at 6mm thickness with a reflection loss value - 32.6 dB at 8.4 GHz frequency. Reflection loss values of multilayer variations with a thickness of 2.4 mm, 3.6mm and 4.8mm each have reflection loss values of -8.02 dB, -19.13 dB and -28.9 dB respectively in the x band frequency range.

scholarly journals Synthesis and Characterization of Lead Free Calcium Bismuth Titanate (Ca0.25Bi0.5 TiO3) Piezoelectric Ceramics

2019 ◽  
pp. 161-164
Keyword(s):  
Bismuth Titanate ◽  
Sol Gel ◽  
Piezoelectric Ceramics ◽  
Xrd Analysis ◽  
Free Calcium ◽  
X Ray Diffraction ◽  
Toxic Heavy Metals ◽  
Sem Images ◽  
Photocatalytic Removal

Bismuth layer-structured piezoelectric (BLSP) calcium bismuth titanate (Ca0.25Bi0.5TiO3) piezoelectric ceramics have been prepared via a conventional sol gel reaction method by mixing the desired chemicals in stoichiometric amounts. Calcium bismuth titanate (CBT) samples were characterized by means of XRD, SEM and FTIR spectroscopy. X-ray diffraction (XRD) analysis revealed that CBT ceramics exhibit a single phase orthorhombic structure. The SEM images confirm its morphological size ranging from 1.00 to 2.75 µm. FTIR analysis reveals that calcium bismuth titanate has been prepared successfully, and the ratio of calcium, bismuth and titania was found to be 0.25:0.50:1.00, respectively. The photocatalytic removal of Methylene Blue, cadmium (Cd2+) and other toxic heavy metals will be carried out using CBT materials.

scholarly journals Whitlockite-Type Structure as a Matrix for Optical Materials: Synthesis and Characterization of Novel TM-SM Co-Doped Phosphate Ca9Gd(PO4)7, a Single-Phase White Light Phosphors

Minerals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 76
Author(s):  
Ivan V. Nikiforov ◽  
Dina V. Deyneko ◽  
Dmitry А. Spassky ◽  
Bogdan I. Lazoryak ◽  
Sergey M. Aksenov
Keyword(s):  
Single Phase ◽  
Second Harmonic ◽  
Visible Spectrum ◽  
Type Structure ◽  
Luminescence Spectroscopy ◽  
X Ray Diffraction ◽  
Materials Synthesis ◽  
Solid State Method ◽  
Co Doped

A series of novel phosphates with the general formulas Ca9Gd0.9−xTm0.1Smx(PO4)7 and Ca9Gd0.9−yTmySm0.1(PO4)7 were synthesized by solid-state method. As-obtained phosphates were characterized by powder X-ray diffraction and second harmonic generation analyses, dielectric measurements, luminescence spectroscopy. All samples were single phase and characterized by the whitlockite-type structure with space group R3c. An influence of admixture concentration of REE3+ ions in the initial host on dielectric properties was studied in details. Synthesized phosphates are characterized by intensive luminescence. The emission in the orange region of the visible spectrum is observed for Ca9Gd0.9Sm0.1(PO4)7 with a maximum intensity band at 602 nm. The line in blue region at 455 nm, which corresponds to 1D2 → 3F4 Tm3+ transition, is registered for Ca9Gd0.9Tm0.1(PO4)7. Emission in the white region of CIE coordinates was registered for Tm-Sm co-doped compounds.

Solubility of Mn in ZnO Nanocrystallites using Wet Chemical Synthesis

2019 ◽  
Vol 2 (1) ◽  
pp. 53-61
Author(s):  
Esau Abekah Armah ◽  
Francis Kofi Ampong ◽  
Martin Egblewogbe ◽  
Hubert Azoda Koffi ◽  
Francis Boakye ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Magnetic Semiconductor ◽  
Solubility Limit ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Phase Synthesis ◽  
Wet Chemical Synthesis ◽  
Wet Chemical ◽  
Binary Compounds

There is a substantial amount of literature dealing with many aspects of synthesis and characterization of pure and doped binary compounds including Mn-doped ZnO which has been widely studied due to its superb properties as a dilute magnetic semiconductor (DMS). Aspects concerning doping limits for these compounds is an important stage in the search for new materials. Samples of Zn1-xMnxO nanocrystal were synthesized at temperatures of 180 °C and 200 °C using wet or liquid phase synthesis method. Dopant concentrations x=0.5, 1, 1.5, 2, 2.5, 5, 10, 20, 30, 40 and 50 per cent were studied. Powder x-ray diffraction (PXRD) patterns of the samples were analyzed with a view to determining the onset of secondary phases and hence the solubility limit of the dopant. The solubility limit for Mn in ZnO samples synthesized at temperature of 200 °C is realized at x <20%. For samples synthesized at temperature of 180 °C, the solubility limit is x <0.5%.

Influence of Calcined Temperature and Sintered Technology on the Properties of NBT-KBT-BT Lead-Free Piezoelectric Ceramics

2012 ◽  
Vol 562-564 ◽  
pp. 376-379
Author(s):  
Xin You Huang ◽  
Chun Hua Gao ◽  
Zhi Gang Chen
Keyword(s):  
Grain Size ◽  
Piezoelectric Ceramics ◽  
Impurity Phase ◽  
Lead Free ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
Soaking Time ◽  
Comprehensive Properties ◽  
Calcined Temperature ◽  
Sintered Temperature

The influence of calcined temperature and sintered technology on the properties of 0.85 （ Na0.5Bi0.5 ） TiO3-0.144(K0.5Bi0.5)TiO3-0.006BaTiO3(NBT-KBT-BT) lead-free piezoelectric ceramics was investigated by conventional solid state method, and the relationship between calcined temperature, sintered technology and properties of NBT-KBT-BT lead-free piezoelectric ceramics was obtained. The influence of calcined temperature on the material phase was investigated by X-ray diffraction(XRD), the influence of sintered technology on the microstructure of ceramics was investigated by scanning electron microscopy (SEM). Results show that there are impurity phase Na0.5Bi4.5Ti4O15 and main crystal phase （Na0.5Bi0.5）TiO3 while calcined temperature is 830-870°C, the impurity phase decreases while calcined temperature increases, there is pure （Na0.5Bi0.5）TiO3 phase while calcined temperature is more than 890°C. The density of ceramics first increases and then decreases, the crystal grain size first increases and then decreases while sintered temperature increases. The crystal grain size increases straight while soaking time prolonges. When calcined temperature is 890°C, sintered temperature is 1160°C and soaking time is 2 h, the comprehensive properties is good which the dielectric constant(εr) is 1055, the piezoelectric constant(d33) is 144 pC/N, the dielectric loss(tanδ) is 4.0%.

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