Table of content

Iraqi Journal of Applied Physics

المجلة العراقية للفيزياء التطبيقية

ISSN: 18132065 23091673
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, Computers Networks and Applications.

Loading...
Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
Email: editor_ijap@yahoo.co.uk

Table of content: 2008 volume:4 issue:2

Article
Charge Injection into Organic Semiconductors

Authors: Y. Shen --- G.G. Malliras
Pages: 5-8
Loading...
Loading...
Abstract

In this work, the dependence of injection on the degree of doping of an organic semiconductor was studied. A model organic semiconductor, tetra-methyl triphenyl diamine doped polycarbonate (PC:TMTPD) was used for these experiments. By substituting TMTPD molecules with a TMTPD+SbF6- salt, the degree of doping in the organic semiconductor was systematically varied. Changes in the electrical characteristics of devices with various electrodes were analyzed to yield the dependence of injection on the degree of doping. Along with the doping concentration, the temperature and distance between electrodes was also varied. This provided a better understanding of how doping, temperature and electrode spacing affect device performance.


Article
A Mathematical Model to Describe the Densification Process During the Sintering of Ceramic Compacts

Authors: A.K. Ahmad --- F.A. Rasen --- S.A. Fadhil
Pages: 11-18
Loading...
Loading...
Abstract

A mathematical model describing the densification process during viscous sintering process of a ceramic material contains solid inclusions is developed (modified) from the Scherer model which describes the rate of densification during sintering for a free solid inclusions material. The modification is performed by assuming that the unit cell is composed from three types of constituent; the solid inclusions phase, the porous phase and the viscous phase. The solid inclusions phase is assumed to block the propagation of the viscous phase through the cylinders that assumed to be found through the body of the compact. The modified model is used to study the effect of several factors on densification during sintering process and used in predicting the effective viscosity of the viscous phase that formed during sintering.


Article
FTIR Spectroscopic and Computational Studies on Hydrogen Adsorption on the Zeolite Li–FER

Authors: P. Nachtigall
Pages: 21-27
Loading...
Loading...
Abstract

The interaction, at a low temperature, between molecular hydrogen and the zeolite Li–FER was studied by means of variable temperature infrared spectroscopy and theoretical calculations using a periodic DFT model. The adsorbed dihydrogen molecule becomes infrared active, giving a characteristic IR absorption band (H–H stretching) at 4090cm–1. Three different Li+ site types with respect to H2 adsorption were found in the zeolite, two of which adsorb H2. Calculations showed a similar interaction energy for these two sites, which was found to agree with the experimentally determined value of standard adsorption enthalpy of H0=–4.1(±0.8)kJ.mol–1. The results are discussed in the broader context of previously reported data for H2 adsorption on Na–FER and K–FER.


Article
Characterization of Diode Laser-Pumped Nd:YVO4 Disk Laser

Authors: A.J. Haider --- K.I. Hajem --- M.K. Zaher
Pages: 31-34
Loading...
Loading...
Abstract

In this work describe experimental set up disk laser of Nd:YVO4 in active mirror configuration, face pumping and cooling by thermoelectric Cooler (TEC) type heat exchanger to over come the limitation of prior design. With (4x5x1mm) disk dimensions to investigate the relationship between the pumping power from a diode laser at (808nm) with the optical elements in the setup and with the output power. The results show that a (0-600)mW CW output power which indicate 56% efficiency at (1064nm) wavelength from Nd:YVO4 thin disk material when pumped with power between (0-1500) mW from a 808nm CW laser diode.


Article
Marangoni Convection Effect on the Melting of GaSb/InSb/GaSb Sandwich Structured Sample

Authors: S. Umemura
Pages: 35-38
Loading...
Loading...
Abstract

Effect of Marangoni convection on the flow and melting of the GaSb/InSb/GaSb sandwich structured sample is studied by means of the numerical simulation. Thermal Marangoni convection enhances the melting of crystal near the free surface under the both normal and reduced gravity fields. The effect of solutal Marangoni convection on the flow field is smaller than that of thermal Marangoni convection under the normal gravity field because of the gravitational segregation.

Table of content: volume: issue: