Search Results

You are looking at 1 - 10 of 211 items for :

  • "Eutectics" x
  • All content x
Clear All

been responsible for the rejection of 70% of the potentially active drugs. Eutectic mixtures have played a key role in improving the absorption of many compounds by increasing their solubility and dissolution properties [ 1 ]. A eutectic is a

Restricted access

Thermal and physico-chemical studies on binary organic eutectic systems

4-Aminoacetophenone with benzoin and 4-nitrophenol

Journal of Thermal Analysis and Calorimetry
Authors: Shiva Kant, U. S. Rai, and R. N. Rai

Introduction The eutectic alloys are found competent materials for the supersonic aircraft, space vehicles, high pressure tanks, thermoelectric devices (safety plugs in fire detection apparatus, alarm signals, etc.), and

Restricted access

the study in detail. In this article, we report the phase diagram study, thermal study of the pure compounds and the eutectics such as heat of fusion, Jackson’s roughness parameter, excess thermodynamic functions, and microstructural study. However

Restricted access

transformation temperature, transparency, wider choice of materials, and minimized convection effects are the special features which have prompted a number of research groups to work on binary organic eutectics, monotectics, and molecular complexes [ 5 – 9 ]. To

Restricted access

Introduction The field of phase equilibria in materials science has become extensive, and a number of review articles have appeared and reported in the literature [ 1 – 6 ] but the nature and liquidus structure of eutectic

Restricted access

performance high energy explosive, and it could form eutectic liquid carrier. The energy and liquefy temperature for the eutectic mixtures could be adjusted yet and the different performance required casting explosive ingredients also could be confected. The

Restricted access

systems [ 1 – 3 ]. The organic eutectics, monotectics and addition compounds, which could be considered as organic analogs of metallic eutectics, monotectics and intermetallic compounds [ 4 – 6 ], have gained potential importance due to low transformation

Restricted access

Abstract  

Phase diagrams of urea-α-naphthol and urea-benzoic acid systems, determined by the thaw-melt method, show the formation of simple eutectic in each case. The growth velocity data, determined at different undercooling (ΔT) by observing the rate of movement of interface in a capillary, obey the Hillig-Turnbull equation, v=u(ΔT)n, where u and n are constants depending on the nature of the materials. Using enthalpy of fusion, undercooling (ΔT) and melting point data, entropy of fusion, interfacial energy, enthalpy of mixing, critical radius size and excess thermodynamic functions were calculated. The microstructural investigations give characteristic features of the eutectics.

Restricted access

, such as engine blocks and cylinder heads. Chemical modification of Al–Si cast alloys, by way of adding Na and Sr, is a well-known melt treatment that alters its eutectic silicon morphology. In addition, Sb and Bi, which are in the same group in

Restricted access

concentration were prepared by weighing, grinding, and homogenized in normal laboratory conditions, room temperature, and atmospheric pressure. The melting temperature and enthalpy of fusion of eutectic phases were determined by differential scanning

Restricted access