Research Paper
Influence of Operating Conditions of a Ball Mill on the Specific Surface Area of ​​the Ground Alumina Oxide
Influence of Operating Conditions of a Ball Mill on the Specific Surface Area of ​​the Ground Alumina Oxide

Khalid Khazzal Hummadi

Volume 24, Issue 1 , January 2005, Page 1-12

https://doi.org/10.30684/etj.24.1B.1

Abstract
  The effect of mill diameter ( D = 74.3 , 86.6 , 99 and 112.5 mm ), ratio of feed volume to mill volume ( V - 10,30,50,70 % ), number of balls ( N = 2,3,4,  5,6 and 7 balls), ball ...  Read More ...
Research Paper
(R-12) محاكاة تصميم مبخر صفيحي مدرفل يعمل بموائع التثليج البديلة ل
(R-12) محاكاة تصميم مبخر صفيحي مدرفل يعمل بموائع التثليج البديلة ل

Talab kashash Murtazaa; Ali Dawood salman

Volume 24, Issue 1 , January 2005, Page 1-22

https://doi.org/10.30684/etj.24.1A.8

Abstract
  Abstract In this present work computational models are fabricated , these model depended on the elements of longitudinal finned tube to design the roll bound evaporator . The computational ...  Read More ...
Research Paper
Particle Size Reduction by Compressibility Process of the Alumina oxide
Particle Size Reduction by Compressibility Process of the Alumina oxide

Khalid Khazzal Hummadi

Volume 24, Issue 1 , January 2005, Page 13-20

https://doi.org/10.30684/etj.24.1B.2

Abstract
  Abstract The effect of the compaction applied pressure , compaction velocity and feed particle size on the size reduction of Alumina Oxide by using the compressibility process were ...  Read More ...
Research Paper
Electrical And Optoelectronic Properties Of p - PbSe / n - Si Heterojunction
Electrical And Optoelectronic Properties Of p - PbSe / n - Si Heterojunction

Uday Nayef

Volume 24, Issue 1 , January 2005, Page 21-24

https://doi.org/10.30684/etj.24.1B.3

Abstract
  Abstract Electrical and optoelectronic properties of p - PbSe / n - Si heterojunction detector have been investigated . The electrical properties under dark condition show a rectifying ...  Read More ...
Research Paper
دراسة تأثير كثافة السائل على عمل مضخة الرفع الهوائية
دراسة تأثير كثافة السائل على عمل مضخة الرفع الهوائية

Talab Kashash Murtazaa; saad sami farhan

Volume 24, Issue 1 , January 2005, Page 23-30

https://doi.org/10.30684/etj.24.1A.9

Abstract
  Abstract This research has studied the Effect of Lifted Liquid Density on the Function of Air Lift Pump which consisted of a suction pipe and mixing chamber with diameter [ ( 0.0635,0.0635 ...  Read More ...
Research Paper
Photoluminescence Stability of Polymer - Coated Porous Silicon
Photoluminescence Stability of Polymer - Coated Porous Silicon

Bassam Ghalib Rasheed

Volume 24, Issue 1 , January 2005, Page 25-30

https://doi.org/10.30684/etj.24.1B.4

Abstract
  Abstract The photoluminescence stability of the porous silicon produced by laser - induced etching of silicon has been studied . We have employed a method to improve the PL stability ...  Read More ...
Back Mixing and Optimization of Pulsed Plate Column Employing the Central Composite Rotatable Design
Back Mixing and Optimization of Pulsed Plate Column Employing the Central Composite Rotatable Design

Majid Saleem Radhaa

Volume 24, Issue 1 , January 2005, Page 31-41

https://doi.org/10.30684/etj.24.1B.5

Abstract
  Abstract Study of the hydrodynamics of pulsed column is of vital importance in the scale up and understanding of such columns . The back mixing appears during the study of the hydrodynamic ...  Read More ...
Research Paper
Study of Dry Sliding Wear of Some Copper Alloys
Study of Dry Sliding Wear of Some Copper Alloys

Munaa khadher abbas; Fahdal malak Rashed

Volume 24, Issue 1 , January 2005, Page 31-42

https://doi.org/10.30684/etj.24.1A.10

Abstract
  Abstract : This research has studied the properties of dry sliding wear of three groups of copper alloys , Aluminum bronze , Silicon bronze and Admiralty gun bronze . These three groups ...  Read More ...
Research Paper
IR - Blind Visible Silicon Detector
IR - Blind Visible Silicon Detector

Khalid Al-Ta'ai

Volume 24, Issue 1 , January 2005, Page 42-47

https://doi.org/10.30684/etj.24.1B.6

Abstract
  Abstract In the present paper , silicon p - n junction detector of 600 + 25 nm peak response has been characterized . This peak was obtained by depositing high purity Au thin film onto ...  Read More ...
Research Paper
دراسة سرعة انتشار اللهب الطباقي المستقر لخليط (غاز البترول المسال العراقي -الهواء ) بأستخدام المحرق المربع
دراسة سرعة انتشار اللهب الطباقي المستقر لخليط (غاز البترول المسال العراقي -الهواء ) بأستخدام المحرق المربع

Mohammed Naser hameed; Jaseem mohameed abd- alkhareem; Faris ammir hatam

Volume 24, Issue 1 , January 2005, Page 43-55

https://doi.org/10.30684/etj.24.1A.11

Abstract
  Abstract Laminar burning velocity for ( L.P.G - Air ) premixed mixture was measured by using square burner and the technique of area method with range of equivalent ratio ( 0.883-1.233 ...  Read More ...
Research Paper
Wear Mechanisms in Electroless Nickel Plating
Wear Mechanisms in Electroless Nickel Plating

Ali H. Ataiwi; Mohammed M. Hamady; Sondus M. Nouri

Volume 24, Issue 1 , January 2005, Page 48-55

https://doi.org/10.30684/etj.24.1A.7

Abstract
  Abstract In this study electroless nickel coating are deposited on high carbon low alloy steel type ( 13 A ) substrate . After coatings some specimens were heat treated at different ...  Read More ...
Research Paper
The Effect Of Lead Addition On The Wear Resistance Of Ar - 16 % Si Alloy Under Dry Sliding Conditions
The Effect Of Lead Addition On The Wear Resistance Of Ar - 16 % Si Alloy Under Dry Sliding Conditions

Esraa abd alkhadeer alkhalady

Volume 24, Issue 1 , January 2005, Page 56-64

https://doi.org/10.30684/etj.24.1A.12

Abstract
  Abstract This research is devoted to study the wear characteristics of aluminum - 16 % silicon under dry sliding conditions at room temperature , using ( Pin - on - Disc ) technique ...  Read More ...
Research Paper
دراسة خواص طبقات الطلاءالمنتجة بالرش بالقوس الكهربائي
دراسة خواص طبقات الطلاءالمنتجة بالرش بالقوس الكهربائي

Mohammed jaseem khadem; Hala salman hassan; Ismail khalil jasim

Volume 24, Issue 1 , January 2005, Page 65-73

https://doi.org/10.30684/etj.24.1A.13

Abstract
  Abstract The spraying process has been applied by spraying of Cu - 15 % Sn - 0.65 % P wire on a medium carbon ( 0.4 % ) . The effect of the mechanism of lamella formation on the microstructure ...  Read More ...
Research Paper
Effect of Blades Vibration on the Dynamic Response of Turbo - Compressor System
Effect of Blades Vibration on the Dynamic Response of Turbo - Compressor System

Muwaffaq ali tawfik; Adel abd naif

Volume 24, Issue 1 , January 2005, Page 74-91

https://doi.org/10.30684/etj.24.1A.14

Abstract
  Abstract The research studies the effect of the blade vibration on the dynamic response of turbo - compressor rotor system . The design angles for the blades , gas entrance and exits ...  Read More ...