scholarly journals PENENTUAN UKURAN BUTIR KRISTAL CuCr0,98Ni0,02O2 DENGAN MENGGUNAKAN X-RAY DIFRACTION (XRD) DAN SCANNING ELECTRON MICROSCOPE (SEM)

2020 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Lalu A. Didik
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Solid State Reaction ◽  
X Ray ◽  
Scanning Electron

Telah dilakukan pengukuran ukuran butir Kristal CuCr0,98Ni0,02O2 dengan menggunakan persamaan Scherer dan analisa langsung menggunakan Scanning Electron Microscope (SEM). Kristal CuCr0,98Ni0,02O2 disintesis dengan menggunakan metode solid state reaction.  Untuk dapat mendapatkan data menggunakan persamaan Scherer, sampel harus terlebih dahulu dikarakterisasi menggunakan X-Ray Difraction (XRD). Hasil penghitungan menggunakan persamaan Scherer menunjukkan ukuran butiran Kristal sebesar (0,113 ± 0,015) µm dengan ralat relatif sebesar 13,2 %. Sedangkan pengukuran secara langsung menggunakan SEM menunjukkan ukuran butir Kristal sebesar (1,08 ± 0,23) µm dengan ralat relatif sebesar 21 %. Perbedaan hasil penghitungan dengan hasil pengukuran menggunakan SEM disebabkan karena morfologi lapisan. Morfologi kristal yang dihasilkan oleh scanning berkas elektron sekunder pada SEM memungkinkan untuk mendapatkan perbesaran gambar yang cukup sehingga dapat dilakukan pengukuran secara langsung. Sedangkan penghitungan ukuran butir Kristal CuCr0,98Ni0,02O2 menggunakan  persamaan Scherer berdasarkan prinsip difraksi sinar X dengan jarak antar celahnya adalah jarak antar atom pada Kristal sehingga untuk mendapatkan data ukuran butir Kristal menggunakan persamaan Scherer sampel harus terlebih dahulu dikarakterisasi menggunakan XRD. Selain itu, karena dilakukan secara langsung pengukuran hasil karakterisasi menggunakan SEM bukan mengukur ukuran butir Kristal melainkan ukuran partikel.   

Comparison of Lini0.5Mn1.5O4 and LiMn2O4 for Lithium-Ion Battery

2013 ◽  
Vol 860-863 ◽  
pp. 956-959
Author(s):  
Xing Hua Liang ◽  
Lin Shi ◽  
Yu Si Liu ◽  
Tian Jiao Liu ◽  
Chao Chao Ye ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Retention Rate ◽  
Lithium Ion ◽  
X Ray ◽  
Charge Discharge ◽  
Scanning Electron

The High Potential Material Lini0.5Mn1.5O4 was Synthesized via Solid-State Reaction.The Surface Morphology and Particle Size of the Sample were Observed by Scanning Electron Microscope(SEM).The Crystal Structure of the Sample was Collected and Analyzed through X-Ray Diffractometry(XRD).The Sample was Charaterized by Charge-Discharge Tests.Results Indicated that the Cycling Retention Rate was about 80%,after being Charge-Diacharged at a Rate of 0.1C in a Voltage of 3.45-4.77V for 10 Times.Compared with Limn2O4,LiNi0.5Mn1.5O4 has good cycle performance.Both of LiNi0.5Mn1.5O4 structure were space group of Fd3m.

Microstructures of Zirconium Titanate Powders and Ceramics Prepared by Solid-State Mixed Oxide Method

2008 ◽  
Vol 55-57 ◽  
pp. 145-148
Author(s):  
C. Puchmark ◽  
P. Tipparak
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Heating Rate ◽  
Sintering Temperature ◽  
Zirconium Titanate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Jcpds File ◽  
Scanning Electron

Zirconium titanate (ZrTiO4): ZT powders were prepared by solid-state mixed oxide method. The mixed powder was calcined at various temperatures for 3 h ranging from 1100 to 1400 oC with a heating rate of 5 oC/min. X-ray diffraction analysis of the powders was performed using a diffractometer with Cu Ka. Pyrochlore phase was observed for calcinations below 1300 oC. In general, the strongest reflections apparent in patterns could be matched with a JCPDS file number 74-1504. The optimum calcination temperature for the formation of ZrTiO4 phase was found to be about 1300 oC for 3 h with heating rate of 5 oC/min. The microstructures of calcined powders were examined using scanning electron microscope (SEM). The particle size of powder increased with increasing calcination temperature. The ZT ceramics sintered at 1450, 1500, 1550 and 1600 oC for 4 h with heating rate of 5 oC/min, were checked for phase formation by X-ray diffraction. The density of sintered samples was measured by Archimedes method. The microstructures of sintered samples were examined using scanning electron microscope (SEM). The average grain sizes were checked by linear interception method. It was found that, the samples sintered at 1450 and 1500 oC gave rise to high purity ZT ceramics and the peaks matched well with ZrTiO4 phase in a JCPDS file number 74-1504. Unknown phases were found in ZT ceramics sintered at 1550 and 1600 oC. The value of density was in the range of 4.32 - 4.92 g/cm3 or 84.26 - 96.12 % of the ZT theoretical density. The densification of ZT ceramics decreased with increasing sintering temperature. The ZT ceramics sintered at 1450 and 1500 oC showed the average grain size of 8.55 and 12.55 µm, respectively. At sintering temperature 1550 and 1600 oC, morphology of grains changed to plate like crystals of second phases.

Alumina-Zirconia-Silica Ceramics Synthesis by Selective Laser Sintering/Melting

2011 ◽  
Vol 121-126 ◽  
pp. 2487-2491
Author(s):  
Wei Wang ◽  
Yong Xian Liu ◽  
Jerry Y.H. Fuh ◽  
Peng Jia Wang
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Selective Laser Sintering ◽  
Dental Materials ◽  
Laser Sintering ◽  
Sintering Process ◽  
Optimal Parameters ◽  
X Ray ◽  
Scanning Electron

In this paper, the synthesis and investigation of the glass in the Al2O3- ZrO2-SiO2 system, to be used in dental field. The mechanism of powder–state becoming a solid state block during the laser sintering process was disclosed by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analysis on powders and sintered samples. The optimal parameters of laser and can be obtained by the study. The results allowed us to affirm that the characteristics of this glass, in comparison with the tooth hard substances and other commonly employed inorganic dental materials, recommend it for further utilization in the dental field.

Effect of Excitation Wavelength on the Blue Emitting Sr2MgSi2O7 Phosphor

2015 ◽  
Vol 1087 ◽  
pp. 360-364 ◽  
Author(s):  
C.H. Chang ◽  
Swee Yong Pung ◽  
M.N. Ahmad Fauzi ◽  
Shah Rizal Kasim
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Blue Emission ◽  
Excitation Wavelength ◽  
X Ray ◽  
Reducing Atmosphere ◽  
Long Afterglow ◽  
Crystal Phases ◽  
Scanning Electron

Long afterglow blue emission silicate (SMS) phosphor doped with Eu2+ and Ce3+ was synthesized via traditional solid-state reaction in the weak reducing atmosphere. X-ray diffractometer (XRD), field-emission scanning electron microscope (FE-SEM) and energy dispersive X-ray (EDX) spectroscope were employed to characterize its crystal phases, surface morphology and elements composition. The photoluminescence (PL) properties were characterized by PL Spectrophotometer. It was found that the excitation wavelength played a significant role in photoluminescence emission intensity.

Applications & Comparison of Solid State Non-Dispersive & Dispersive X-Ray Analysis on a High Resolution Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 28-29
Author(s):  
R. Ruscica ◽  
R. Wolf ◽  
D. Evins
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
High Resolution ◽  
Scanning Electron Microscope ◽  
Simultaneous Analysis ◽  
Materials Analysis ◽  
X Ray ◽  
Logical Extension ◽  
Scanning Electron

A logical extension of applications of the Scanning Electron Microscope is the area of x-ray analysis. The instrument utilized is the Materials Analysis Company Model 700 High Resolution Scanning Electron Microscope equipped with a fully focusing dispersive spectrometer and a Solid-State nondispersive spectrometer. The instrument can be equipped with both accessories so that simultaneous analysis with both systems is possible.

scholarly journals Synthesis of GaN Nanorods by a Solid-State Reaction

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Keyan Bao ◽  
Liang Shi ◽  
Xiaodi Liu ◽  
Changzhong Chen ◽  
Wutao Mao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Solid State ◽  
Scanning Electron Microscope ◽  
Blue Emission ◽  
Synthetic Route ◽  
X Ray Diffraction ◽  
X Ray ◽  
Strong Blue Emission ◽  
Scanning Electron

An atom-economical and eco-friendly chemical synthetic route was developed to synthesize wurtzite GaN nanorods by the reaction of Na and the as-synthesized orthorhombic GaOOH nanorods in a stainless steel autoclave at . The lengths of the GaN nanorods are in the range of 400–600 nm and the diameters are about 80–150 nm. The process of orthorhombic GaOOH nanorods transformation into wurtzite GaN nanorods was investigated by powder X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM), indicating that the GaN product retained essentially the same basic topological morphology in contrast to that of the GaOOH precursor. It was found that rhombohedral was the intermediate between the starting orthorhombic GaOOH precursor and the final wurtzite GaN product. The photoluminescence measurements reveal that the as-prepared wurtzite GaN nanorods showed strong blue emission.

X-ray micro tomography in the scanning electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 106-107 ◽  
Author(s):  
W. Brünger
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Target Surface ◽  
The Body ◽  
X Rays ◽  
Cross Sectional ◽  
X Ray ◽  
Micro Tomography ◽  
Scanning Electron

Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1). Many of these projections at different angles are used to reconstruct the body-layer, usually with the aid of a computer. The picture element size of present tomographic scanners is approximately 1.1 mm2.Micro tomography can be realized using the very fine X-ray source generated by the focused electron beam of a scanning electron microscope (see fig. 2). The translation of the X-ray source is done by a line scan of the electron beam on a polished target surface /2/. Projections at different angles are produced by rotating the object.During the registration of a single scan the electron beam is deflected in one direction only, while both deflections are operating in the display tube.

PHAX-SCAN: Functional integration of a Scanning Electron Microscope and an energy-dispersive x-ray analyser

1989 ◽  
Vol 47 ◽  
pp. 56-57
Author(s):  
Marc H. Peeters ◽  
Max T. Otten
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
Functional Integration ◽  
Energy Dispersive ◽  
X Rays ◽  
X Ray ◽  
High Speed Analysis ◽  
Scanning Electron

Over the past decades, the combination of energy-dispersive analysis of X-rays and scanning electron microscopy has proved to be a powerful tool for fast and reliable elemental characterization of a large variety of specimens. The technique has evolved rapidly from a purely qualitative characterization method to a reliable quantitative way of analysis. In the last 5 years, an increasing need for automation is observed, whereby energy-dispersive analysers control the beam and stage movement of the scanning electron microscope in order to collect digital X-ray images and perform unattended point analysis over multiple locations.The Philips High-speed Analysis of X-rays system (PHAX-Scan) makes use of the high performance dual-processor structure of the EDAX PV9900 analyser and the databus structure of the Philips series 500 scanning electron microscope to provide a highly automated, user-friendly and extremely fast microanalysis system. The software that runs on the hardware described above was specifically designed to provide the ultimate attainable speed on the system.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

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