EFFECT OF EXCESS BISMUTH ON THE SYNTHESIS OF BISMUTH SILICATE (Bi4Si3O12) POLYCRYSTALS

2009 ◽  
Vol 23 (08) ◽  
pp. 2093-2099 ◽  
Author(s):  
J. KAEWKHAO ◽  
N. UDOMKAN ◽  
W. CHEWPRADITKUL ◽  
P. LIMSUWAN
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Electron Microscope ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Bismuth Silicate ◽  
X Ray ◽  
Structure And Morphology ◽  
Crystallization Morphology ◽  
Scanning Electron

In this study, the effect of bismuth content on the crystal structure and morphology of bismuth silicate ( BSO:Bi 4 Si 3 O 12) polycrystals were investigated with X-ray diffraction (XRD) analysis and scanning electron microscope (SEM). BSO materials have been successfully prepared by the solid-state reaction. The BSO phase was crystallized at 950°C for 12 h. In summary, 10% of excess bismuth was found to be the optimum composition with respect to crystallization, morphology, and grain size.

Study on the Properties of Doped La in BaBi4Ti4O15 Ceramic

2007 ◽  
Vol 26-28 ◽  
pp. 243-246
Author(s):  
Xing Hua Yang ◽  
Jin Liang Huang ◽  
Xiao Wang ◽  
Chun Wei Cui
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sintering Temperature ◽  
Solid Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lanthanum Content ◽  
Scanning Electron

BaBi4-xLaxTi4O15 (BBLT) ceramics were prepared by conventional solid phase sintering ceramics processing technology. The crystal structure and the microstructure were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). The XRD analyses show that La3+ ions doping did not change the crystal structure of BBT ceramics. The sintering temperature increased from 1120°C to 1150°C with increasing Lanthanum content from 0 to 0.5, but it widened the sintering temperature range from 20°C to 50°C and refined the grain size of the BBT ceramic. Additionally, polarization treatment was performed and finally piezoelectric property was measured. As a result, the piezoelectric constant d33 of the 0.1at.% doped BBLT ceramics reached its highest value about 22pc/N at polarizing electric field of 8kV/mm and polarizing temperature of 120°C for 30min.

Surface-Modification of Sulfur Nanoparticles with Surfactants and Application in Agriculture

2013 ◽  
Vol 785-786 ◽  
pp. 475-479 ◽  
Author(s):  
Seithzan Turganbay ◽  
S.B. Aidarova ◽  
N.E. Bekturganova ◽  
G.K. Alimbekova ◽  
K.B. Musabekov ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Surface Modification ◽  
Electron Microscope ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Average Size ◽  
Triton X ◽  
Scanning Electron ◽  
Sulfur Nanoparticles

This work presents the results of obtaining the sulfur nanoparticles, which can be used in agriculture as a fungicide. Sulfur nanoparticles were obtained by modifying the surface of sulfur using various surfactants including cetyltriammoniumbromide (CTAB), sodium dodecylbenzene sulfanate (SDBS) and Triton X-100 (TX-100). The size, crystal structure and morphology of sulfur nanoparticles were determined by methods as laser size analyzing (LSA), X-ray diffraction (XRD), scanning electron microscope (SEM). It was found that the nanoparticles had a sulfur monoclinic β-form struture, and their average size was in the range of 1000-1500 nm.

Effect of NH4Cl Flux on Structural and Luminescent Properties of CaS: Eu2+ Phosphors

2014 ◽  
Vol 989-994 ◽  
pp. 755-758
Author(s):  
Yun Jie Zhang ◽  
Jie Zhao ◽  
Da Jian Wang ◽  
Jian Ma
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Raw Materials ◽  
Luminescent Properties ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Structure Morphology ◽  
Scanning Electron

CaS:Eu2+phosphors were prepared by two steps method at a relatively low temperature (1050°C) using NH4Cl as a flux. The influences of NH4Cl flux concentrations on the crystal structure, morphology and photoluminescent properties of CaS:Eu2+phosphors were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), respectively. XRD analysis shows that when the raw materials added with the NH4Cl flux, the crystal structure was not changed .The SEM images indicate that increase of the NH4Cl flux enlarged the grain size of the phosphor particles. The luminescence intensity of CaS:Eu2+was enhanced with adding NH4Cl flux and up to the maximum emission intensity when the addition of NH4Cl flux is 1wt%.

The Effect of Water Content on the Formation of TiO2 Nanotubes in Ethylene Glycol

2010 ◽  
Vol 173 ◽  
pp. 102-105 ◽  
Author(s):  
Khairul Arifah Saharudin ◽  
Srimala Sreekantan
Keyword(s):  
Crystal Structure ◽  
Aspect Ratio ◽  
Ethylene Glycol ◽  
Water Content ◽  
Anatase Phase ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

In this paper, anodization of Ti foil was carried out in ethylene glycol (EG) containing 5 wt% NH4F solution and 0 to 1.5 wt% of water at 50 V for 60 min. The pH of the bath was kept constant at ~pH7. The crystal structure was studied by X-Ray Diffraction (XRD) analysis, and the morphology was observed via field emission scanning electron microscopy (FESEM). TiO2 nanotube with aspect ratio of 100 was obtained in EG containing less than 1wt % water. The nanotubes wall was very smooth. Increasing the water content > 1wt % results in short nanotubes of approximately 6.2μm with aspect ratio of 62. As anodized, nanotubes were amorphous and annealed at 400 °C promote 100 % anatase phase. Photocatalytic activity of the nanotubes produced at different water content was also evaluated by the degradation of methyl orange and the detail of the observation was discussed thoroughly in this paper.

The Effect of CaCO3 Addition on Physical Properties of ZnO-Based Crystal Glaze

2012 ◽  
Vol 620 ◽  
pp. 12-16 ◽  
Author(s):  
Abdul Rashid Jamaludin ◽  
Shah Rizal Kasim ◽  
Zainal Arifin Ahmad
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Scanning Electron Microscope ◽  
Physical Properties ◽  
Crystallization Temperature ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

The effects of calcium carbonate (CaCO3) addition on the physical properties of ZnO-based crystal glaze batches were investigated. Samples were fired at different gloss firing temperatures ranging from 1180-1220°C with 3 hours soaking at 1060°C crystallization temperature. X-ray diffraction (XRD) analysis identifiedthe crystal phase occurred as willemite (Zn2SiO4) and the scanning electron microscope (SEM) analysis indicated that willemite crystals are in the acicular needle like shape that formed spherulite. The intensities of willemite peaks decreased with CaCO3 addition and completely vanished at 5.0 wt% CaCO3. Varied formation of spherulites developed of the surface of crystal glaze as the flows of the glaze stretched further as the amount of CaCO3 increased.

scholarly journals Mineral Preparation Using Rod Mill for Mineral Galena Characterization

2021 ◽  
Vol 1 (1) ◽  
pp. 355-362
Author(s):  
Riria Zendy Mirahati ◽  
Yasmina Amalia ◽  
Mochamad Juliyanto ◽  
Lintang Larasati Adi Putri
Keyword(s):  
Grain Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Grinding Process ◽  
X Ray Diffraction ◽  
Mineral Concentration ◽  
X Ray ◽  
Concentration Process ◽  
Mineral Characterization ◽  
Scanning Electron

Galena mineral preparation was carried out for mineral characterization. The mineral characterization carried out included XRD (X-Ray Diffraction), XRF (X-Ray Fluorescence), SEM-EDS (Scanning Electron Microscope-Energy Dispersive X-Ray). The preparation of galena minerals begins with the process of reducing the grain size including crushing and grinding. The results of crushing and grinding are then separated based on grain size using a sieve or siever to get a grain size of -200 mesh. The grinding process using a rod mill needs to be timed, so that the results are not too fine which is causing the recovery in the mineral concentration process to be low.

Characterization of the Specificity in Three Commercial Dental Ceramic Powders

2017 ◽  
Vol 68 (4) ◽  
pp. 707-710
Author(s):  
Horia Manolea ◽  
Mirela Opri ◽  
Nicoleta Cioatera ◽  
Adriana Voinea ◽  
Radu Rica ◽  
...  
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Sintered Material ◽  
Xrd Analysis ◽  
Dental Ceramics ◽  
X Ray Diffraction ◽  
Ceramic Powders ◽  
X Ray ◽  
Scanning Electron

The aim of this study was to present and discuss the characteristics of three ceramic powders as well as the sintered material from the three commercial dental ceramics produced by Vita Zahnfabrik, Germany (VM13 and VMK Master, used for veneering metal frameworks, respectivelly VM9 used for veneering zirconia frameworks). An X-ray diffraction (XRD) analysis was performed, Raman spectra were recorded and the morphology of the samples was evidenced by using a high resolution scanning electron microscope, equipped with an EDXS detector. The results of this study corroborated with the presented literature data helps practitioners to better understand the interaction of these biomaterials with oral tissues, and, also helps researchers to modify the properties of ceramics for a better integration in the intraoral condition.

Structural and Morphological Studies of Porous ZnO for Dye-Sensitized Solar Cell Applications

2009 ◽  
Vol 293 ◽  
pp. 67-70
Author(s):  
Abdullah Huda ◽  
P.A. Nugroho
Keyword(s):  
Crystal Structure ◽  
Electron Microscope ◽  
Crystal Structure Analysis ◽  
Dye Sensitized Solar Cell ◽  
Random Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Morphological Studies ◽  
Scanning Electron

Porous nanoflake ZnO has been successfully synthesized via a pyrolitic process of chemical bath deposition (CBD). The latter produced nanoflakes of Zn5(CO3)2(OH)6 as an intermediate product, which transformed to ZnO at 300°C. The microstructure has been investigated by surface morphology observation using a scanning electron microscope (SEM) and crystal-structure analysis using X-ray diffraction (XRD). A random structure of 40nm-thick flakes, grown perpendicularly on the substrate, has been obtained.

scholarly journals Synthesis of La1-xCaxMnO3 (x = 0 and 0.2) through ultrasonic mixing and its characterisation

2018 ◽  
Vol 197 ◽  
pp. 02010
Author(s):  
Mangasi A M ◽  
Iwan Sugihartono ◽  
Teguh B P ◽  
Sitti Ahmiatri Saptari ◽  
Erfan Handoko
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Grain Size ◽  
Single Phase ◽  
Perovskite Manganite ◽  
Stoichiometric Mixture ◽  
X Ray ◽  
Structure And Morphology ◽  
Mixing Method ◽  
Scanning Electron

In order to investigate the crystal structure and morphology of perovskite manganite materials, we have been successfully synthesized LaMnO3 and La0,8Ca0,2MnO3 systems through ultrasonic mixing method. The application of these materials is the alternative cooler technology beside freon gas using with residual emission gas. Stoichiometric mixture of La2O3, MnCO3, and CaO with more than 95 % purity were be prepared by ultrasonic mixing 40 kHz 60 watts for 30 minutes to result homogen mixtures. The samples were calcinated at 800°C for 1 h and sintered at 1100°C for 3 h. The structure of the samples was examined by X-ray diffractometer (XRD) Phillips and result as single phase of perovskite manganite materials. Morphology was studied using a 5310LV Jeol scanning electron microscope (SEM) that show the same grains of perovskite manganite material. While Ca substituted for La in the sample, the grain size decreases with decreasing the volume of cell units and finally the particle size of La0.8Ca0.2MnO3 phase decreases.

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