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1

Synthesis of hydroxyapatite in the presence of anionic surfactant

Kolodziejczak-Radzimska A., Samuel M., Paukszta D., Piasecki A., Jesionowski T.

Physicochemical Problems of Mineral Processing

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2014

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Vol. 50, iss. 1

225--236

EN

Hydroxyapatite was synthesized by precipitation method using an anionic surfactant (SDS) template, at ambient temperature and normal pressure. Phosphoric acid and disodium phosphate were used as a precursor of phosphorous, whereas calcium hydroxide and chloride were used as a precursor of calcium. The obtained hydroxyapatite was subjected to a wide range of physicochemical analysis using various measurement techniques. In order to get information about the properties of the obtained products, the following analysis of characteristics was performed: dispersion (NIBS), morphological (SEM), adsorptive (BET) and structural (XRD). Energy-dispersive X-ray spectroscopy and elemental analysis were also applied.

2

Transport properties of as-deposited cadmium phthalocyanine Schottky-barrier devices

Samuel M., Menon C. S., Unnikrishnan N. V.

Materials Science Poland

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2007

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Vol. 25, No. 1

177--184

EN

Sandwich samples of the type (Au-CdPc-Al) have been fabricated by successive vacuum deposition of gold (Au), cadmium phthalocyanine (CdPc), and aluminium (Al) thin films on glass substrates. Good rectification properties have been observed in the device. Ohmic conduction in the lower voltage range has been identified from the forward bias current density-voltage characteristics at room temperature. At higher voltages, a space charge limited conductivity (SCLC) controlled by an exponential trapping distribution above the valence band edge has been observed. The transport properties of the material at ambient temperature have been obtained from an analysis of the samples in the SCLC region. Schottky emission has been identified at lower voltages from the analysis of the reverse bias characteristics.

3

Aluminium base composites for high temperature application.

Gronostajski J., Matuszak A., Marciniak H., Samuel M.

Inżynieria Materiałowa

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1998

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R. XIX, nr 4

750-735

EN

In this paper is presented the method of manufacturing of composites characterized by good mechanical properties at high temperature by direct recycling of aluminium chips with ferro-chromium powder as reinforcing phase.