Exploring the solid-state interfacial reaction of Al/Fe2O3 nanothermites by thermal analysis

Lead-free piezoelectric 0.95(Na0.49K0.49Li0.02)(Nb0.8Ta0.2)O3–0.05CaZrO3 with 2 wt % MnO2 addition was prepared using mechanochemically-assisted solid-state synthesis. Upon mechanochemical activation of the mixture of reagents partial amorphization occurs which contributes to a significantly lower temperature of completion of the solid-state reaction, ~600 °C as opposed to ~700 °C for the conventional solid-state synthesis as determined by thermal analysis. The ceramic specimens prepared by the mechanochemically-assisted route exhibit improved compositional homogeneity and slightly enhanced piezoelectric properties, achieved in a considerably shorter processing time compared to the conventional solid-state synthesis route, which was studied as a reference.

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Thermal analysis and solid-state 13C NMR study of crosslink in polyimides containing acetylene groups in the main chain

Polymer ◽

10.1016/s0032-3861(00)00827-2 ◽

2001 ◽

Vol 42 (9) ◽

pp. 4045-4054 ◽

Cited By ~ 25

Author(s):

K. Nakamura ◽

S. Ando ◽

T. Takeichi

Keyword(s):

Thermal Analysis ◽

Solid State ◽

13C Nmr ◽

Main Chain ◽

Nmr Study ◽

Solid State 13C Nmr

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The challenge of methods of thermal analysis in solid state and materials chemistry

Pure and Applied Chemistry ◽

10.1515/pac-2016-1105 ◽

2017 ◽

Vol 89 (4) ◽

pp. 451-459 ◽

Cited By ~ 1

Author(s):

Milan Drábik

Keyword(s):

Thermal Analysis ◽

Solid State ◽

Solid State Chemistry ◽

Iron Doping ◽

Chemical Bonds ◽

Materials Chemistry ◽

Tg And Dta ◽

Cross Links ◽

Dta Curves ◽

Typical Temperature

Abstract Thermogravimetry (TG) and differential thermal analysis (DTA) are traditional, but still useful, experimental techniques for obtaining information in the realms of materials and solid state chemistry. This paper presents two case studies (many more could be cited) to illustrate the strengths (and limitations) of these techniques: (1) Iron doping of clinoptilolite (the most common zeolite): the typical parameters of both components appear clearly in the TG and DTA curves. The decrease of the Tmax value of the structurally-typical DTA effect of FeOOH by approximately 100°C is attributed to the weakening of chemical bonds in FeOOH due to the incorporation of the doping component into the structure of this zeolite. (2) Macrodefect-free (MDF) materials: the results of both TG and DTA unambiguously locate the typical temperature range of the decomposition of the P{4}–O–Al/Fe{6} cross-links within the interval of 200–300°C. The presence of cross-links is shown by the DTA data while the TG data can be used to measure the degree of cross-linking, which is valuable information when studying both raw mixes and the final materials for a variety of MDF materials.

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Sulfone Containing Clay Electrolytes and Their Potential for Li-Rechargeable Batteries

MRS Proceedings ◽

10.1557/proc-548-173 ◽

1998 ◽

Vol 548 ◽

Cited By ~ 1

Author(s):

Gregory J. Moore ◽

M. Stanley Whittingham

Keyword(s):

Thermal Analysis ◽

Solid State ◽

Rechargeable Batteries ◽

Molecular Formula ◽

X Ray Diffraction ◽

Impedance Measurements ◽

X Ray ◽

Lithium Secondary Batteries ◽

Solid State Cell ◽

Made In

ABSTRACTClays have been synthesized and several types of molecules have been intercalated into them to enhance their ionic conductivity. The clay has the molecular formula of Litaeniolite, Li(Mg2Li)Si4O10F2, and the inserted molecules include PEO and two varieties of sulfone, tetramethylene sulfone and ethylmethyl sulfone. These have been made in the interest of electrolytes in lithium secondary batteries in order to produce a truly solid state cell. The products have been thoroughly characterized by x-ray diffraction to verify the uptake of the molecules into the layers, thermal analysis to observe the stabilization of the intercalated molecules, along with impedance measurements to test their conductivity.

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

Materials Science Forum ◽

10.4028/www.scientific.net/msf.805.254 ◽

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.

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