Materials Processing Using Solar Energy

Abstract

The main aspects refer to metals and refractory materials behaviour, at high temperature, to materials purifying and to achieve some chemical syntheses. The main technological parameter of the heating is temperature, heating obtained by focusing Sun's rays. The heating can be used inside the furnace to produce metallic material into a crucible, without any complementary power source. For the future, a bigger interest presents some other metals melting, more expensive than steel, such as titanium, zirconium and molybdenum. In this case it must be ensured an inert atmosphere and thereby it must be taken into account the complications and expenses related to these.

Plant available potassium and phosphorus in arable soil: a comparative study on testing methods

“…Low temperature air/ propanebutane gas mixture was used at the following conditions: airflow of 6 L/min at 12 psi, sample uptake 4.5 mL/min, daily adjusting of propane-butane gas flow to obtain a maximum signal for nominal K standard. The concentration of the nominal standard was chosen depending on the extracting procedure and expected sample concentrations [26][27]. The instrument zero was adjusted using the studied extracting solutions.…”

The Choice of Recycling Methods for Single-Polymer Polyester Composites

“…The extrusion process can be divided into single-and multiscrew extrusion by the type of plasticisation system. The basic technological parameters in the process of extrusion of a specific product, with a screw type suitable for a given material, are head temperature and the temperature of the individual extruder zones [23][24][25][26][27][28][29][30]. A single-screw extruder was used in this recycling process.…”

“…Therefore, it is very important to constantly search for and identify the potential for recycling polymers, especially polymeric composites, as, according to the Directive 2008/98/EC of the European Parliament and the Council of 19 November 2008 on waste [12], this process is necessary and indispensable. The process of recycling polymers and polymeric composites is a very difficult and costly process [3][4][13][14][15][16][17][18][19][20][21][22][23][24].…”

Magnetic Properties of FeCoWYB-based Ferromagnetic Alloys with a Small Addition of Pt

“…The precursor for obtaining magnetically hard materials are rapid-cooled tapes, usually with an amorphous structure [7][8][9][10][11][12]. As a result of heat treatment of the amorphous tapes, single-phase or polinary phase alloys rich in different crystalline phases based on Fe, Pt and other metals can be obtained [13][14][15][16][17][18][19][20][21][22][23][24].…”