Optical and scanning electron microscopic and energy-dispersive X-ray analytical studies on some typical surface structures of flux-grown DyFeO3 crystals

1987 ◽  
Vol 22 (12) ◽  
pp. 4484-4498 ◽  
Author(s):  
P. N. Kotru ◽  
S. K. Kachroo ◽  
B. M. Wanklyn ◽  
B. E. Watts
Keyword(s):  
Surface Structures ◽  
Energy Dispersive ◽  
Electron Microscopic ◽  
X Ray ◽  
Analytical Studies ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

scholarly journals PELATIHAN PENGGUNAAN PERALATAN LABORATORIUM FISIKA MATERIAL DAN RISET BAGI GURU-GURU FISIKA SMA SE KOTA MANADO

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
Donny R Wenas
Keyword(s):  
Fourier Transform ◽  
Ultra Violet ◽  
Energy Dispersive ◽  
Electron Microscopic ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron Microscopic ◽  
Scanning Electron ◽  
Microscopic Energy

Kemampuan melaksanakan kegiatan praktikum/demonstrasi dan mengembangkan materi pembelajaran berbasis laboratorium adalah salah satu kompetensi guru fisika. Peningkatan kemampuan tersebut akan meningkatkan daya saing lulusan siswa. Tujuan pelaksanaan kegiatan pengabdian pada masyarakat ini adalah: 1) memperkenalkan pengetahuan tentang laboratorium Fisika material dan Riset bagi guru Fisika SMA se kota Manado; 2) memberikan pelatihan keterampilan penggunaan peralatan laboratorium Fisika material dan riset bagi guru Fisika SMA se kota Manado; 3) menjelaskan manfaat karakterisasi peralatan laboratorium Fisika Material dan Riset bagi guru Fisika SMA se kota Manado; dan 4) menjalin kerja sama antara dunia kerja yaitu Sekolah dengan Perguruan Tinggi (UNIMA) agar tercipta keserasian tentang kebutuhan Sumber Daya Manusia dilapangan dan kurikulum yang diterapkan khususnya pada Program Studi Fisika FMIPA UNIMA. Metode yang dilakukan adalah ceramah, demonstrasi, peragaan, diskusi dan evaluasi. Kegiatan ini akan menghasilkan produk berupa buku panduan bagaimana dan apa yang harus dilakukan dalam mengoperasikan peralatan laboratorium fisika material dan riset. Buku panduan akan dirancang semenarik mungkin disertai gambar dan keterangan serta langkah-langkah dalam mengoperasikan alat laboratorium. Disamping buku panduan, akan dibuat juga buku ajar tentang konsep dan teori terkait dengan peralatan laboratorium fisika material dan riset serta artikel ilmiah. Berdasarkan kegiatan yang dilaksanakan, maka diperoleh hasil sebagai berikut: 1) para peserta (Guru fisika SMA) mengenal pengetahuan tentang spektroskopi UV-Vis (Ultra Violet Visible); 2) memahami pengetahuan tentang spektroskopi FTIR (Fourier Transform Infra red); 3) mengenal pengetahuan tentang SEM-EDX (Scanning Electron Microscopic-Energy Dispersive X-Ray Spectrometric); dan 4) mampu mengoperasikan alat spektrometer UV-Vis, FTIR, dan SEM-EDX.

Micromorphological Studies on Flux Grown RFeO3 (R = Dy, Ho) Crystals Using SEM and EDAX Techniques

1990 ◽  
Vol 48 (2) ◽  
pp. 542-543
Author(s):  
P. N. Kotru ◽  
S. K. Kachroon ◽  
A. K. Razdan ◽  
B. M. Wanklyn
Keyword(s):  
Rare Earth ◽  
Energy Dispersive ◽  
Growth Yields ◽  
Flux Growth ◽  
Structural Studies ◽  
Line Profiles ◽  
Electron Microscopic ◽  
X Ray ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Results are presented of microtopographical studies on rare-earth orthoferrite RFeO3 (R = Dy, Ho) crystals by scanning electron microscopic and energy-dispersive x-ray analytical (EDAX) techniques. The flux growth yields crystals with habit faces. These crystals are therefore suitable for surface structural studies.The crystals of RFe03 (R = Dy, Ho) are grown from starting compositions of R203, Fe203 (solute), Pb0, PbF2 (solvent), and B203 (additive) in a platinum crucible; the growth procedure has been reported previously. Figures 1 and 2 illustrate platinum deposits on an HoFe03 surface. The modification of advancing growth fronts by an imperfection on an HoFe03 surface is illustrated in Fig. 3.X-ray mapping and elemental line profiles taken across some peculiar structures on an RFe03 crystal indicate that the areas covered by the structures are rich in R but deficient in Fe. Almost the same observations were made on DyFe03 crystals. It is concluded that use of PbO-PbFe2-B203 flux systems for the growth of RFe03 (R = Dy, Ho) results in the precipitation of magnetoplumbite (PbFe12019) and R0F.

Scanning Electron Microscopic and Energy-Dispersive X-Ray Analysis Findings on Two Brand New Intraocular Lenses

1992 ◽  
Vol 24 (1) ◽  
pp. 51-54 ◽  
Author(s):  
N.F. Schrage ◽  
M. Reim ◽  
W.-G. Burchard ◽  
Ch. Teping ◽  
M. Wenzel
Keyword(s):  
Intraocular Lenses ◽  
Energy Dispersive ◽  
Electron Microscopic ◽  
X Ray ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

scholarly journals Preparation of Reswellable Amorphous Porous Celluloses through Hydrogelation from Ionic Liquid Solutions

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3249 ◽  
Author(s):  
Satoshi Idenoue ◽  
Yoshitaka Oga ◽  
Daichi Hashimoto ◽  
Kazuya Yamamoto ◽  
Jun-ichi Kadokawa
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Amorphous Structure ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
X Ray ◽  
Liquid Solutions ◽  
Scanning Electron Microscopic ◽  
Porous Morphology ◽  
Scanning Electron

In this study, we have performed the preparation of reswellable amorphous porous celluloses through regeneration from hydrogels. The cellulose hydrogels were first prepared from solutions with an ionic liquid, 1-butyl-3-methylimidazolium chloride (BMIMCl), in different concentrations. Lyophilization of the hydrogels efficiently produced the regenerated celluloses. The powder X-ray diffraction and scanning electron microscopic measurements of the products suggest an amorphous structure and porous morphology, respectively. Furthermore, the pore sizes of the regenerated celluloses, or in turn, the network sizes of cellulose chains in the hydrogels, were dependent on the concentrations of the initially prepared solutions with BMIMCl, which also affected the tensile mechanical properties. It was suggested that the dissolution states of the cellulose chains in the solutions were different, in accordance with the concentrations, which representatively dominated the pore and network sizes of the above materials. When the porous celluloses were immersed in water, reswelling was observed to regenerate the hydrogels.

scholarly journals Influence of the type of electrolyte on the morphological and crystallographic characteristics of lead powder particles

2013 ◽  
Vol 78 (9) ◽  
pp. 1387-1395 ◽  
Author(s):  
Nebojsa Nikolic ◽  
Vesna Maksimovic ◽  
Goran Brankovic ◽  
Predrag Zivkovic ◽  
Miomir Pavlovic
Keyword(s):  
X Ray Diffraction ◽  
Electron Microscopic ◽  
X Ray ◽  
Lead Powder ◽  
Scanning Electron Microscopic ◽  
Crystallographic Characteristics ◽  
Powder Particles ◽  
Primary Type ◽  
Secondary Type ◽  
Scanning Electron

Lead electrodeposition processes from the basic (nitrate) and complex (acetate) electrolytes were mutually compared by the scanning electron microscopic and the X-ray diffraction analysis of the produced powder particles. The shape of dendritic particles strongly depended on the type of electrolyte. The dendrites composed of stalk and weakly developed primary branches (the primary type) were predominantly formed from the basic electrolyte. The ramified dendrites composed of stalk and of both primary and secondary branches (the secondary type) were mainly formed from the complex electrolyte. In the both type of powder particles Pb crystallites were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the electrocrystallization processes.

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