نتایج جستجو برای: powder xrd

تعداد نتایج: 70056  

2014
Rasel Das Md. Eaqub Ali Sharifah Bee Abd Hamid

X-ray powder diffraction is one of the most potential characterization tools and a nondestructive technique for characterizing both organic and inorganic crystalline materials. The method previously used for measuring phase identification, quantitative analysis and to determine structure imperfections of samples from various disciplines such as geology, polymeric, environmental, pharmaceutical,...

2011
Dae-Yong Shin Guozhong Cao Kyung-Nam Kim

Cerium doped lutetium silicate powders were prepared by solegel process with different cerium concentrations (0, 0.01 and 0.03 mol%). The synthesized lutetium silicate powders were investigated by X-ray diffraction (XRD), TG-DTA, SEM, and Photoluminescence excitation and emissions. The crystallization of lutetium silicate is observed at 1.073 C in S2 (and S3: 1.058 C) sample. The formation of l...

2002
Leonid A. Solovyov Vladimir I. Zaikovskii Alexandr N. Shmakov Oleg V. Belousov Ryong Ryoo

The model of structure and structural transformation of the mesostructured carbon material CMK-1 was established by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) investigations. The investigations showed that the enantiomeric carbon subframeworks formed within the pores of the MCM48 mesoporous template used for the material synthesis displaced with respect to one ano...

2007
Preetam Singh Ashvani Kumar Deepak Davinder Kaur

In this paper, we report the preparation and characterization of both the ZnO nanocrystalline thin films and nanopowder by ultrasonic spray pyrolysis technique. ZnO films were grown on polished Si(1 0 0) and amorphous glass substrates at different deposition temperature range varying from 200 to 500 1C. Both orientation and the size of the crystallites were found to depend on the substrate and ...

Journal: :Indian journal of biochemistry & biophysics 2014
Vimal S Joshi Sonal R Vasant J G Bhatt Mihir J Joshi

Urinary calculi constitute one of the oldest afflictions of humans as well as animals, which are occurring globally. The calculi vary in shape, size and composition, which influence their clinical course. They are usually of the mixed-type with varying percentages of the ingredients. In medical management of urinary calculi, either the nature of calculi is to be known or the exact composition o...

2004
Maria Helena Santos Marise de Oliveira Herman Sander Mansur Wander Luiz Vasconcelos

Several techniques have been utilized for the preparation of hydroxyapatite (HA) and other calcium phosphates for the development of biomaterials. It is vital to know the reaction kinetics to be able to control the material obtained by the aqueous solution route. In the present work, HA has been produced by different wet precipitation processes and different experimental conditions. Calcium hyd...

2014
Vera Steinmann Jeremy R. Poindexter Yun Seog Lee Helen Hejin Park Tonio Buonassisi

Although highly valuable as an R&D tool, ALD is a rather slow and thus expensive fabrication method for growing fi lms on the order of 1 μm thick, posing a challenge to industrial scaleup. Hence, there is a need to transfer learnings from ALD to higher-throughput manufacturing techniques without compromising quality. We fi rst demonstrate the ease of phase purifi cation of commercial SnS powder...

Journal: :Acta poloniae pharmaceutica 2008
Satish R Desai Sanjiv R Dharwadkar

Differential scanning calorimetric (DSC) curves recorded for ornidazole drug during heating and cooling showed that the drug which melted around 86.1 degrees C undercooled to well below ambient room temperature of 27 degrees C during the cooling cycle. The undercooled melt kept in the freezer at 0 degree C for 10 days duration also remained in the viscous liquid form. This liquid on taking out ...

2012
D Michalik M Sopicka-Lizer T Pawlik J Chrapoński

The paper presents preparation of YAG precursor powders mixture with ability for the reaction sintering at lower temperature. The powder mixture was mechanochemically processed and characterized for the specific surface area and crystallinity (XRD). Sintering experiments were performed on the batched powders, mechanochemically processed powders and as-synthesised YAG powders. XRD measurements a...

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