Thermal Analysis of Materials

Speyer, Robert F.

doi:10.1201/9781482277425

Cited by 106 publications

(66 citation statements)

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“…As expected [17], transformations points scaled with the heating rate. The melting and solidification points of Au were chosen among those available for various metals (Al, Ag, Au, Cu, Ni) because the transformation on cooling occurred with very limited undercooling, often practically undetectable with our experimental set up.…”

Section: The Shape Of the Signal And The Temperature Calibration Of Dsupporting

confidence: 76%

A study of the α ↔ γ transformation in pure iron: rate variations revealed by means of thermal analysis

Papandrea

Battezzati

2007

Philosophical Magazine

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Section: The Shape Of the Signal And The Temperature Calibration Of Dsupporting

confidence: 76%

A study of the α ↔ γ transformation in pure iron: rate variations revealed by means of thermal analysis

Papandrea

Battezzati

2007

Philosophical Magazine

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“…The specific heat capacity is then calculated by Eq. 1 (Speyer 1993): where: DT sample/reference -zero is the temperature difference between the sample (or reference material) and the empty crucible during the operating range; m is the mass of the sample or reference.…”

Section: Methodsmentioning

confidence: 99%

“…In this study it was used a well-established method (Speyer 1993) based on DSC technique to measure the specific heat capacity of 2 plastic bonded explosives (PBX) formulations based on 1,3,5-trinitroperhydro-1,3,5-triazine (RDX) and their individual compounds. This experimental technique (DIN 51007:1994) has the advantage of using a baseline, which allows a better accuracy and enables specific heat capacity values with less scatter at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Research on the Specific Heat Capacity of PBX Formulations Based on RDX

Chaves¹,

Góis²

2016

J.Aerosp. Technol. Manag.

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ABSTRACT:The experimental results of specific heat capacity of 2 plastic bonded explosives formulations based on 1,3,5-trinitroperhydro-1,3,5-triazine, using differential scanning calorimetry thermal analysis, and the theoretical ones calculated with the specific heat capacity and mass fraction of individual compounds are compared for a temperature range between 340 and 410 K. Apart the filler, the plastic bonded explosives composition includes the binder based on hydroxyl-terminated polybutadiene, the plasticizer bis (2-ethylhexyl) sebacate and the curing agent isophorone diisocyanate. The experimental and theoretical results showed a better approach when no curing agent is added. Without curing agent, the specific heat capacity of plastic bonded explosives increases linearly with temperature. When plastic bonded explosive is cured, the specific heat capacity is nearly constant until 380 K and decreases linearly for higher temperature values. These results suggest that phase change requires adjusting parameters to different heating rates in order to describe adequately the experimental data.

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“…Es evidente que las pérdidas por calcinación son discutibles, dado que la tendencia debería ser hacia valores inferiores, como lo señala el autor (22), no obstante los resultados industriales se encuentran a un nivel más cercano de lo expuesto por otros investigadores (16)(17)(18). Referente a la reactividad, esta resultó ser mayor a nivel laboratorio que la correspondiente obtenida en planta.…”

Section: -Change Of the Reactivity Limes On The Loss Ofignitionunclassified

Evaluación de las propiedades del sistema CaCO<sub>3</sub>-CaO para uso siderúrgico

Tapia¹,

Grijalva²,

Rodríguez³

et al. 1999

REVMETAL

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Resumen En este trabajo se pretende obtener un diagnóstico preliminar y comparativo entre las mediciones experimentales y algunas de tipo industrial, acerca de la valoración de las propiedades fisicoquímicas, estructurales y térmicas en la obtención de cal siderúrgica. Lo anterior conduce a definir que la caracterización del sistema CaC0 3 -CaO, conlleva predecir el grado o capacidad de disolución de la cal, en la solución de escoria, durante el proceso de refinación de acero. Los yacimientos del mineral en estudio se localizan en la zona límite de influencia de Lázaro Cárdenas Michoacán y el estado de Guerrero (La Unión), México. El estudio evidenció, de acuerdo con los resultados obtenidos respecto a las características fisicoquímicas y térmicas, la existencia de propiedades limitantes en la calidad de la cal producto. Por tanto se hace necesario atender a un estudio de detalle posterior, sobre el comportamiento cinético del proceso de descomposición, a fin de lograr en lo posible mayores contenidos de óxidos básicos y descenso en las pérdidas por calcinación, aspectos que son exigibles en cales de calidad competitiva.Palabras clave: Cal siderúrgica. Descomposición térmica. Pérdidas por calcinación. Reactividad. Evaluation of the properties of the CaC0 3 CaO system for metallurgieal use AbstractThe principal goal of this work, is to make a preliminary and comparative study on the physicalchemistry, structural and thermal properties of the metallurgieal lime production using experimental, and in some cases industrial measurements. This is important, because the caracterization of the CaC0 3 CaO system, prediets the dissolution grade of the lime on the slag solution in the steelmaking. The mineral is located on the border of Michoacán (Lázaro Cárdenas) and the Guerrero states (La Unión) México. This study evidences limited properties of this lime, which is due to the thermal and physicalchemistry behavior of the obtained results of this material. However, it is necessary to make a study in the future about the kinetic behavior during decomposition. This is necessary because it is important to obtain an increase in the basic oxides concentration and a decrease in the loss of ignition, which is important for the competitive lime production.

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Thermal Analysis of Materials

Cited by 106 publications

References 0 publications

A study of the α ↔ γ transformation in pure iron: rate variations revealed by means of thermal analysis

A study of the α ↔ γ transformation in pure iron: rate variations revealed by means of thermal analysis

Research on the Specific Heat Capacity of PBX Formulations Based on RDX

Evaluación de las propiedades del sistema CaCO<sub>3</sub>-CaO para uso siderúrgico

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