A method for measuring the pair interaction potential between colloidal particles by extrapolation measurement of collective structure to infinite dilution is presented and explored using simulation and experiment. The method is particularly well suited to systems in which the colloid is fluorescent and refractive index matched with the solvent. The method involves characterizing the potential of mean force between colloidal particles in suspension by measurement of the radial distribution function using 3D direct visualization. The potentials of mean force are extrapolated to infinite dilution to yield an estimate of the pair interaction potential, U (r). We use Monte Carlo (MC) simulation to test and establish our methodology as well as to explore the effects of polydispersity on the accuracy. We use poly-12-hydroxystearic acid-stabilized poly(methyl methacrylate) (PHSA-PMMA) particles dispersed in the solvent dioctyl phthalate (DOP) to test the method and assess its accuracy for three different repulsive systems for which the range has been manipulated by addition of electrolyte.1

The present study aims to investigate the effect of sintering temperature and time on the sintering behaviour of ceramic tiles from 100% tungsten tailings. The relationship between phases, microstructure and physicomechanical strength was analysed. The results demonstrated that there are three phases, namely, quartz (SiO 2 ), kyanite (Al 2 SiO 5 ) and hematite (Fe 2 O 3 ). The microstructures of pores varied from irregular ones with interconnected porosity to isolated and rounded ones in the ceramic tiles as the sintering temperature and time increase. In addition, high sintering temperature and long sintering time promise greater pores. The sample that was sintered at 10508C for 1 h has a compact structure and superior physicomechanical strength of the ceramic tiles: low water absorption (0.2%), high bulk density (2.42 g cm 23 ) and flexural strength (91 MPa). The results illustrated that utilisation of pure tungsten tailings in ceramic tile production constituted a feasibility of adding value.

The effect of alloying concentration of Dy and the absorption amount of hydrogen on the magnetic properties of PrFeB magnets have been studied in this work. Experimental * data show that the easy direction of magnetization (EDM) of the Pr-Fe-B-H system is determined by hydrogen concentration. Radial anisotropic magnets can be obtained from hydrogenated PrlSFe,gB6 powders with hydrogen of 4500 ppm. A slight decrease of hydrogen content down to 4250 ppm leads to a uniaxial anisotropic magnet. Partial replacement of Pr by Dy significantly influences the anisotropy of the Pr-Fe-B-H system with saturated hydrogen. A 0.9 at. % Dy substitution for Pr changes the anisotropy of hydrogen decrepitated powders from planer to cone, thus resulting in an isotropic magnet. As the amount of Dy substitution increases to 1.35 at. %, the EDM of magnets persist in the field direction during alignment compaction.