Should the mass of a nanoferrite sample prepared by autocombustion method be considered as a realistic preparation parameter?

Polyvinylalcohol (PVA) with good solvent resistance was used in preparation of nanofiltration membrane. The preparation parameter such as PVA concentration, cross-linking agent concentration and reaction time are studied in detail. When the composite membrane was prepared under optimized conditions and tested at 0.4 MPa and 20 °C, the flux of the NF membrane was about 15 L/m2h and the Na2SO4 rejection of it was about 53.3%.

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Characterization of Spin -on Glasses by Microindentation.

MRS Proceedings ◽

10.1557/proc-511-157 ◽

1998 ◽

Vol 511 ◽

Cited By ~ 3

Author(s):

Eva E. Simonyi ◽

K.-W. Lee ◽

Robert F. Cook ◽

Eric G. Liniger ◽

James Speidell

Keyword(s):

Dielectric Constant ◽

Life Expectancy ◽

Polymeric Materials ◽

Curing Temperature ◽

Low Dielectric Constant ◽

Low Dielectric ◽

Bond Density ◽

Microelectronics Industry ◽

Preparation Parameter

ABSTRACTSpin-on glasses are candidates in the microelectronics industry as low dielectric constant insulating layers. Spin-on glasses are very brittle materials. This paper discusses measurement problems as relevant to the characterization of a brittle material by the indentation technique. As for all polymeric materials curing temperature is the most important preparation parameter. There is a correlation between hardness, Young's modulus, the onset of cracking with curing temperature. This dependence on curing temperature is also expressed by the change in Si-H bond density as shown by FTIR data. Life expectancy or aging characteristics were also investigated for these features. As an example results on silsesquioxane spin -on glasses are presented.

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Studies on Black Iron Oxide Pigment. Part-II: Effect of Preparation Parameter on Particle Size and Microstructure of Ferrosoferric Oxide

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v44i1.2711 ◽

1970 ◽

Vol 44 (1) ◽

pp. 31-40 ◽

Cited By ~ 1

Author(s):

AJM Tahuran Neger ◽

Aftabuddin Ahmed ◽

Sufia Parvin ◽

AM Shafiqul Alam

Keyword(s):

Particle Size ◽

Iron Oxide ◽

Standard Sample ◽

Average Particle ◽

X Ray Diffraction ◽

Sample Number ◽

X Ray ◽

Iron Oxide Pigment ◽

Oxide Pigment ◽

Preparation Parameter

This paper deals with the effect of preparation parameter on particle size and microstructure of the prepared ferrosoferric oxide. 10 prepared samples (from 23 samples) and one standard sample (Bayferrox 318 standard 88) collected from BAYER, Germany was selected for this study. X-ray diffraction, petrographic microscopy, scanning electron microscope and particle size analyzer were used to characterize the phase present, particle size and shape of the particle. It is observed from X-ray diffraction that all these samples mainly contain Fe3O4 phase. The shape of the particle is found to be round and agglomerated. The average particle diameter of highest portion of pigment in the peak region is ranged from 12.25μ to 17.32μ, which is very similar to the standard sample (17.32μ). Sample number 9, which was prepared with ferrous sulphate, hydrochloric acid, sodium nitrate and ammonium hydroxide at a molar ratio 1:1.74:0.16:4.07 and standard sample contain narrow high peak in their particle size distribution curve. Another observation is that, experimental parameter, though have some effect on particle size but have no effect on microstructure. Key words: Black iron oxide, Pigment, Particle size, Microstructure, Ferrosoferric oxide. doi: 10.3329/bjsir.v44i1.2711 Bangladesh J. Sci. Ind. Res. 44(1), 31-40, 2009

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Preparation Parameter Development for Layer-by-Layer Assembly of Keggin-type Polyoxometalates

Langmuir ◽

10.1021/la802136u ◽

2008 ◽

Vol 24 (17) ◽

pp. 9921-9921

Author(s):

Bin Wang ◽

Ritesh N. Vyas ◽

Shafi Shaik

Keyword(s):

Layer By Layer ◽

Keggin Type ◽

Layer By Layer Assembly ◽

Preparation Parameter ◽

Layer Assembly

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Studies on Black Iron Oxide Pigment. Part I: Effect of Preparation Parameter on Physical and Optical Properties of Ferrosoferric Oxide

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v43i2.962 ◽

1970 ◽

Vol 43 (2) ◽

pp. 183-196

Author(s):

AJM Tahuran Neger ◽

Sufia Parvin ◽

Aftabuddin Ahmed ◽

AM Shafiqul Alam

Keyword(s):

Optical Properties ◽

Iron Oxide ◽

Ferrous Sulphate ◽

Experimental Result ◽

Oxidizing Agent ◽

Ferrous Chloride ◽

Acid Type ◽

Iron Oxide Pigment ◽

Oxide Pigment ◽

Preparation Parameter

Black iron oxide pigment has been successfully prepared by traditional method. Ferrous sulphate was used as the starting iron source. The effect of amount of acid, type and amount of alkali and oxidizing agent on colour and yield were also studied. It was found that, the conversion of insitu produced ferrous chloride to ferrosoferric oxide yielded brilliant colour hue than that produced directly from ferrous sulphate. The produced ferrosoferric oxide were analyzed for purity and characterized for physical properties to be used as a pigment. The prepared samples were found to be comparable with BAYER bayferrox 318. Statistical evaluation also confirmed the experimental result. Key words : Black oxide pigment, Optical properties, Ferrous sulphate, Oxidizing agent DOI: 10.3329/bjsir.v43i2.962 Bangladesh J. Sci. Ind. Res. 43(2), 183-196, 2008

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Combinatorial Screening of Polymer/Fullerene Blends for Solar Cells by Inkjet Printing

MRS Proceedings ◽

10.1557/opl.2012.646 ◽

2012 ◽

Vol 1390 ◽

Cited By ~ 1

Author(s):

Anke Teichler ◽

Jolke Perelaer ◽

Ulrich S. Schubert

Keyword(s):

Thin Film ◽

Inkjet Printing ◽

Structure Property ◽

Combinatorial Screening ◽

Film Properties ◽

Solution Deposition ◽

Structure Property Relationships ◽

Patterning Technique ◽

Preparation Parameter

ABSTRACTInkjet printing is a highly material-efficient solution deposition technique that enables the preparation of thin-film libraries using little amounts of materials. As a reproducible and precise patterning technique inkjet printing can be integrated into a combinatorial screening workflow that allowed the systematic characterization of thin-film properties of newly developed materials as well as the methodical investigation of preparation parameter that influence the performance of the inkjet printed layers.This contribution provides a demonstration of a combinatorial screening workflow that utilizes inkjet printing to evaluate structure-property relationships of polymer/fullerene blends for the application in organic photovoltaics. Using this approach it is shown that optimized blend compositions as well as printing conditions lead to improved performances of organic solar cell devices.

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