scholarly journals Thermal and Rheological Characteristics of Paraffin Based Fuel on Aluminum Particle Size for Hybrid Rocket Application

2018 ◽  
Vol 22 (2) ◽  
pp. 108-114 ◽  
Author(s):  
Seongjoo Han ◽  
Jinkon Kim ◽  
Heejang Moon ◽  
Junhyung Kim ◽  
Seungwon Ko
Keyword(s):  
Particle Size ◽  
Aluminum Particle ◽  
Rheological Characteristics ◽  
Hybrid Rocket

Hydrogen Generation by Hydrolysis of the Ball Milled Al-C-KCl Composite Powder in Distilled Water

2012 ◽  
Vol 519 ◽  
pp. 87-91 ◽  
Author(s):  
Xia Ni Huang ◽  
Zhang Han Wu ◽  
Ke Cao ◽  
Wen Zeng ◽  
Chun Ju Lv ◽  
...  
Keyword(s):  
Particle Size ◽  
Reaction Temperature ◽  
Fine Particle ◽  
Composite Powder ◽  
Hydrogen Generation ◽  
Aluminum Particle ◽  
Generation Rate ◽  
Composite Powders ◽  
Fine Particle Size ◽  
Hydrolysis Of

In the present investigation, the Al-C-KCl composite powders were prepared by a ball milling processing in an attempt to improve the hydrogen evolution capacity of aluminum in water. The results showed that the hydrogen generation reaction is affected by KCl amount, preparation processing, initial aluminum particle size and reaction temperature. Increasing KCl amount led to an increased hydrogen generation volume. The use of aluminum powder with a fine particle size could promote the aluminum hydrolysis reaction and get an increased hydrogen generation rate. The reaction temperature played an important role in hydrogen generation rate and the maximum hydrogen generation rate of 44.8 cm3 min-1g-1of Al was obtained at 75oC. The XRD results identified that the hydrolysis byproducts are bayerite (Al(OH)3) and boehmite (AlOOH).

scholarly journals Электропроводность наножидкостей с металлическими частицами

2019 ◽  
Vol 45 (9) ◽  
pp. 36
Author(s):  
В.Я. Рудяк ◽  
А.В. Минаков ◽  
М.И. Пряжников
Keyword(s):  
Particle Size ◽  
Ethylene Glycol ◽  
Electric Conductivity ◽  
Heat Conductivity ◽  
Rheological Characteristics ◽  
Nanoparticle Concentration ◽  
Aluminum Particles

AbstractThe electric conductivity is experimentally studied in nanofluids based on water and ethylene glycol containing copper and aluminum particles. Other properties, such as heat conductivity and rheological characteristics, were evaluated as well. The electric conductivity of nanofluids is shown to increase almost linearly with a nanoparticle concentration, but, unlike the heat conductivity, a gain in electric conductivity is due to a decrease in particle size. In this respect, the mechanisms of electric conductivity and heat conductivity are assumed to have the fundamentally different nature.

scholarly journals Karakteristik Reologi Komposit Serbuk Cangkang Kemiri dan Poliuretan

2019 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
Yovial Mahyoedin ◽  
Kurnia Harlina Dewi ◽  
Wenny Marthiana ◽  
Rizky Arman ◽  
Ridho Azhari
Keyword(s):  
Particle Size ◽  
Taguchi Method ◽  
Rheological Characteristics ◽  
Rotational Viscometer ◽  
Stirring Time ◽  
Mechanical Mixer

AbstrakPenelitian ini bertujuan menentukan karakteristik reologi komposit serbuk cangkang kemiri (SCK) berukuran 45µm<d<75µm dan resin Poliuretan (PU) dengan komposisi bervariasi, yaitu 5%:95%, 10%:90%, 15%:85%. Pencampuran SCK dan PU dilakukan dengan mechanical mixer dengan kecepatan dan lama pengadukan masing-masing 10, 15 dan 20 menit dan 100, 200 dan 250 rpm. Reologi komposit diperoleh dengan pengujian rotational viscometer dan dioptimasi dengan metoda Taguchi. Penelitian menunjukkan viskositas terkecil 218,66 mPa.s, ditemukan pada komposit dengan komposisi 5% 95%, waktu pengadukan 15 menit dan kecepatan pengadukan 100 rpm.  Kata kunci: Serbuk cangkang kemiri, Poliuretan, Viskositas, Reologi.  Abstract This study aimed to determine the composite rheological characteristics of candlenut shells (SCK) with particle size of 45µm <d <75µm and polyurethane (PU) resins with varying compositions, namely 5%: 95%, 10%: 90%, 15%: 85%. Mixing of SCK and PU is carried out using mechanical mixers with a speed and stirring time of 10, 15 and 20 minutes and 100, 200 and 250 rpm, respectively. Composite rheology was obtained by rotational viscometer testing and optimized by the Taguchi method. The results showed the smallest viscosity of 218.66 mPa.s, found in composites with a composition of 5% 95%, stirring time of 15 minutes and stirring speed of 100 rpm. Keywords: candlenut shell, polyurethane, viscosity, rheology

Effect of Aluminum Particle Size on the Performance of Aluminized Explosives

2020 ◽  
Vol 45 (5) ◽  
pp. 807-813
Author(s):  
Xinghan Li ◽  
Hongbo Pei ◽  
Xu Zhang ◽  
Xianxu Zheng
Keyword(s):  
Particle Size ◽  
Aluminum Particle

Kurgan Clays in the Production of Ceramic Materials

2020 ◽  
Vol 299 ◽  
pp. 3-7 ◽  
Author(s):  
M.A. Sapozhnikova ◽  
Irina A. Pavlova
Keyword(s):  
Particle Size ◽  
Mechanical Strength ◽  
Size Composition ◽  
Ceramic Materials ◽  
Raw Material ◽  
Rheological Characteristics ◽  
Technological Parameters ◽  
Drying Behavior ◽  
Material Sample ◽  
Technological Study

The properties of overburden rocks in the extraction of dolomite in the form of red-burning clay from the Kurgan region are investigated to determine its suitability in the production of various types of ceramic materials and products. A full technological study of the clay raw material sample was carried out: the mineral, chemical, particle size composition, as well as plasticity, drying behavior, attitude to sintering, and mechanical strength after burning. It is examined how rheological characteristics affect the control of the technological process. The suitability of clay under consideration, both in majolica ceramics and ceramic bricks production, has been established. The technological parameters for the ceramic bricks production are developed.

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