Journal of Thermal Analysis and Calorimetry

http://link.springer.com/journal/10973

List of Papers (Total 567)

Spectroscopic, thermogravimetric and biological studies of Na(I), Ni(II) and Zn(II) complexes of quercetin

The Na(I), Zn(II) and Ni(II) complexes with quercetin have been synthesized. The composition of these compounds was established by means of elemental and thermogravimetric analyses. To study the molecular structure of synthesized compounds, many miscellaneous analytical methods, which complement one another, were used: infrared (FT-IR), Raman (FT-Raman) and electronic absorption ...

Buffer contribution to formation enthalpy of copper(II)–bicine complex determined by isothermal titration calorimetry method

The isothermal titration calorimetry (ITC) technique supported by potentiometric titration data was used to study a buffer contribution to the formation enthalpy of copper(II)–bicine complex obtained directly from the ITC experiments. The calorimetric measurements were carried out at 298.15 K in 100 mM buffer solutions with a pH of 6. In experiments two biologically relevant pH ...

Study on crystallization phenomenon and thermal stability of binary Ni–Nb amorphous alloy

In this paper, a ribbon of binary Ni–Nb amorphous alloy was prepared by the melt spinning technique. Glass transition and crystallization phenomenon of the alloy were investigated by differential scanning calorimetry. Thermal properties of the ribbon of binary Ni–Nb upon heating and cooling were analysed by DTA at a heating/cooling rate of 0.5 K s−1 under the purified argon ...

Effect of cenospheric fillers on the flammability and fire hazard of silicone rubber composites

This paper presents the results of testing the flammability of silicone rubber composites containing fillers, such as cenospheres, cenospheres covered with iron, attapulgite, wollastonite, aluminum hydroxide and silica. In order to increase the insulating character of boundary layer, boron trioxide was incorporated into the composites of silicone rubber as a ceramization additive. ...

The effect of modified keratin on the thermal properties of a cellulosic–elastomeric material

The need for new composite materials that would exhibit good parameters such as mechanical or thermal properties, while being easily processable and able to undergo biodecomposition after its period of use, has been a great source of inspiration for modern material science. A lot of work has been done in the field of biodegradable polymeric materials throughout almost every aspects ...

Microstructure and thermal characteristics of SiC–Al2O3–Ni composite for high-temperature application

The development of the aviation industry is related to the production of new materials that can operate at high temperatures and corrosive atmospheres. The paper presents new material for application in high temperature obtained by pressing and sintering a composite made from SiC–Al2O3–Ni. Analysis of the microstructure showed high porosity, which is caused by used manufacturing ...

Synthesis of Fe8V10W16O85 by a solution method

Phase of block-type structure and formula Fe8V10W16O85 has been synthesized by a solution method using Fe(NO3)3·9H2O, NH4VO3 and (NH4)6W12O39·xH2O as a metal precursors. Brown solid obtained after evaporation of water at 60 °C has been heated in air at temperatures selected based on results of measurements with the aid of differential thermal analysis and thermogravimetric analysis ...

Investigation of key parameters influence on properties of the green pellets and lightweight ceramic proppants obtained by mechanical granulation method

Ceramic proppants are determined as material designed for hydraulic fracturing in the shale gas industry. Shale formation is fractured due to pumping the fracturing fluid including proppants into the unconventional well. Ceramic granulates set in the newly created fissures act as a prop and permit the shale gas of flowing up the well. The aim of this research was to study and ...

Selected thermal properties of polyethylene waxes

Selected thermal properties of different types of polyethylene waxes, i.e. by-products formed in ethylene low-pressure polymerization process, physically and chemically modified waxes are presented in the study. Temperatures of phase transitions and relevant thermal effects were defined using DSC method. Additionally, drop point and penetration of waxes were determined. It was ...

Physico-mechanical and thermal properties of epoxidized natural rubber/polylactide (ENR/PLA) composites reinforced with lignocellulose

The aim of the study was to prepare elastic composites of epoxidized natural rubber with polylactide that was reinforced with lignocellulose. To improve the functional properties of an ENR/PLA blend, we used lignocellulose modified with silanes and silica. The addition of silanes, particularly U511-tetraethoxysilane, improved the strength characteristics of ENR/PLA composites, ...

The influence of heat treatment on the structure and thermal properties of metallic glasses

This paper presents the structure and chosen properties of Fe-based ribbons with specified composition, after casting and heat treating. The aim of this work was to produce amorphous ribbons and study the influence of heat treatment on the structure and thermal properties before and after annealing. The base alloy ingot was prepared by induction melting of pure Fe, Co, B, Si and Nb ...

Temperature-modulated thermomechanical analysis as a potential technique for irreversible stress relaxation measurement in various cables

Temperature-modulated thermomechanical analysis (TMA) is a technique which allows for separation of the temperature-dependent thermal expansion from the time and temperature-dependent creep or stress relaxation behavior. Extrusion during the cable production process may orient and stretch polymer chains which are rapidly cooled in water. Such frozen-in stresses might relax over a ...

Furniture wood waste as a potential renewable energy source

In this study, the combustion behavior of raw waste wood from furniture and samples torrefied at temperatures of 473, 513, 553 and 593 K was investigated. TG-DTG analysis showed that the mass loss in the first stage of the process decreased with the temperature of torrefaction, whereas the temperature in the second stage increased. The influence of torrefaction and combustion ...

Dilatometric study of low-alloy steels with silicon carbide addition

Low-alloy steels produced via the traditional powder metallurgy process, using a die compaction, are currently widely used. Therefore, improving their properties is an issue that attracts much attention. The most common method of enhancing the properties of a given material is introducing additives, e.g., silicon to prealloyed low-alloy steels. It may be added through the ...

Analysis of the effect of antiwear CrN coating thickness on the evolution of thermomechanical interactions in the substrate/PVD coating system

The main goal of this study was to analyze the application possibilities of modulated temperature thermomechanical analysis (MT TMA) for the evaluation of thermomechanical interactions in substrate/PVD coating systems on the example of examination of influence of changes in thickness of a coating on internal stress evolution in these systems. As an indicator of the stress state in ...

Study of PET fibres modified with phosphorus–silicon retardants

In this study, flame-retardant poly(ethylene terephthalate) (PET) fibres were produced using a high-temperature bath method similar to dyeing fibres with disperse dyes. A mixture of aqueous solutions of silicon and phosphorus compounds was used as the flame retardant. Samples of the modified fibres were examined by thermogravimetric analysis. The residue left after limited oxygen ...

Study of thermal properties of polyethylene and polypropylene nanocomposites with long alkyl chain-substituted POSS fillers

The effect of incorporation of octakis({alkyl}dimethylsiloxy)octasilsesquioxanes molecules with n-octyl, n-octadecyl and 4-methyl-hexyl substituents on thermal properties of polypropylene (PP), low-density polyethylene (LDPE) and high-density polyethylene (HDPE) was investigated. Thermal properties of those composite materials were evaluated by means of the differential scanning ...

Impact of adsorption of poly(aspartic acid) and its copolymers with polyethylene glycol on thermal characteristic of Cr2O3

The polymer structure impact on the adsorption layer conformation formed on the chromium (III) oxide surface was investigated. As adsorbates, three macromolecular compounds were tested: poly(l-aspartic acid) homopolymer and two block copolymers containing the poly(amino acid) segments as well as the poly(ethylene glycol) ones in the chain structure. Due to the ionic nature of the ...

Effect of addition of BaO on sintering of glass–ceramic materials from SiO2–Al2O2–Na2O–K2O–CaO/MgO system

Glass–ceramic materials due to the various physical and chemical parameters have a more and more wide application in various areas of engineering. This paper presents a glass–ceramic material originating from the Al2O2–SiO2–Na2O–K2O–CaO/MgO modified by the addition of barium oxide. For the oxide composition which the molar ratio of SiO2/Al2O3 is constant and equal to 6.42, and ...

Thermal stability, crystallization and magnetic properties of Fe-Co-based metallic glasses

The aim of the paper was to investigate thermal stability, crystallization and magnetic properties of Fe-Co-based metallic glasses (MGs). Investigations were carried out on amorphous ribbons with the compositions of [(Fe0.5Co0.5)0.75B0.2Si0.05]96Nb4 and [(Fe0.6Co0.3Ni0.1)0.75B0.2Si 0.05]96Nb4. Thermal properties (liquidus T l and melting T m temperatures) of the pre-alloyed ingots ...

Characteristic of synthesis and transformations of hardystonite in willemite glass-crystalline glaze based on thermal analysis

A new crystalline phase hardystonite (Ca2ZnSi2O7) has been obtained in willemite glass–ceramic glaze containing more than 20 % by mass ZnO. To our knowledge, there was no report about the presence of this calcium zinc silicate in glazes. The aim of this study was to investigate the synthesis and thermal behavior of Ca2ZnSi2O7 in ceramic glaze. A hardystonite formed in glaze at 750 ...

Investigations of rheological properties of nitrided steels using thermodilatometric method with temperature modulation

In this work were developed issues concerning the use of thermodilatometric methods for the evaluation of rheological properties of nitrided and non-nitrided steel substrates and systems composed of steel substrate and physical vapour deposition (PVD) coating. Analysis of the rheological properties of these systems (e.g. viscosity, ability to dissipate the energy of deformation or ...

Thermal analysis of activated carbon obtained from residue after supercritical extraction of hops

Activated carbons have been obtained by physical activation of residue left after supercritical extraction of hops. The effect of pyrolysis temperature on the physicochemical properties of the adsorbents prepared was tested. The carbonaceous materials were characterised by low-temperature nitrogen sorption, determination of pH and the number of surface oxygen groups. The thermal ...

Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systems

This paper focused on the characterization of the composites containing nickel aluminate spinel from Al2O3/NiO and Al2O3/Ni systems. The composites were prepared by die pressing of powders and subsequent sintering of green bodies in air atmosphere. Composites were characterized by XRD, SEM, EDS and DTA/TG/MS analyses. The physical properties of the composites were measured by ...