Differential thermal analysis of solid state reactions under complete volume confinement

1974 ◽  
Vol 8 (1-2) ◽  
pp. 27-33 ◽  
Author(s):  
Clement Campbell ◽  
Anthony I. Beardell
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid State ◽  
Solid State Reactions

Evaluation of the Sinterability of Copper-Substituted Ferrites by Means of Dilatometric Thermal Analysis

2014 ◽  
Vol 805 ◽  
pp. 254-259
Author(s):  
Vera Lúcia Othéro de Brito ◽  
Stéphanie Alá Cunha ◽  
Ana Paula Ribeiro Uchoas ◽  
Fabiana Faria de Araújo ◽  
Cristina Bormio Nunes ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Solid State ◽  
Sintering Temperature ◽  
Thermal Analyses ◽  
Spinel Ferrites ◽  
Solid State Reactions ◽  
Processing Route ◽  
Ceramic Method ◽  
Spinel Formation ◽  
Made In

Cobalt and cobalt-manganese spinel ferrites have magnetostrictive properties suitable for application in magneto-electric and magneto-mechanical transducers. In this work, copper-substituted ferrites of these compositions were processed by means of the ceramic method and their sinterabilities were evaluated by dilatometric thermal analyses. The results obtained suggest that copper affects the solid-state reactions for the spinel formation and lowers the required sintering temperature for the ferrites. However, the densification obtained with sintering of the copper-substituted ferrites at 950oC for 6h was only 64%, which indicates that further adjustments on the processing route must be made in order to obtain higher densities.

Preparation and Characterization of the New Y257 Superconductors

2013 ◽  
Vol 770 ◽  
pp. 22-25 ◽  
Author(s):  
Thitipong Kruaehong
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Critical Temperature ◽  
Solid State ◽  
Superconducting Phase ◽  
Lattice Parameters ◽  
Peritectic Temperature ◽  
Space Group ◽  
Space Groups

The new Y257 superconductor in YBaCuO family was synthesized by standard solid state reaction. The Y257 samples were measured the critical temperature (Tc) by the four-probes method that found at 90 K. The XRD technique and FULLPROF program were used to determine the lattice parameters, space group and phase compositions. It was found that the Y257 exhibited in both of superconducting and non-superconducting phase. The Pmmm space group was fit well on superconducting phase with the lattice parameters as a=3.8108 Å, b=3.8544 Å and c=26.4967 Å. The non-superconducting phase exhibited in two space groups of Pccm (a=12.9770 Å, b=20.54780 Å and c=11.3530 Å) and Im-3m (a= 18.2104 Å, b=18.2104 Å and c=18.2104 Å). The peritectic temperature at 976.73°C was measured by differential thermal analysis.

scholarly journals Contamination Studies on Mollusk Shell Samples

Radiocarbon ◽  
1985 ◽  
Vol 27 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Tomasz Goslar ◽  
Mieczysław F Pazdur
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid State ◽  
Carbon Exchange ◽  
Laboratory Contamination ◽  
Mollusk Shell

A series of shell samples has been studied to determine the magnitude and mechanisms of carbon exchange between shells and their environment. Laboratory contamination experiments included the storing of shell samples in acid and calcareous environments of different 14C concentrations as well as studies of carbon exchange in the course of thermal recrystallization in solid state in an atomosphere of carbon dioxide. The applicability of differential thermal analysis to studies of the structure and texture of shells is discussed.

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