scholarly journals Particle Size Dependence of the Magnetic Heat Capacity of Ni(OH)2Crystal at Low Temperatures

1968 ◽  
Vol 41 (2) ◽  
pp. 536-536 ◽  
Author(s):  
Michio Sorai ◽  
Akio Kosaki ◽  
Hiroshi Suga ◽  
Syûzô Seki
Keyword(s):  
Particle Size ◽  
Heat Capacity ◽  
Low Temperatures ◽  
Size Dependence

scholarly journals Energy distribution in an ensemble of nanoparticles and its consequences

2019 ◽  
Vol 10 ◽  
pp. 1452-1457 ◽  
Author(s):  
Dieter Vollath
Keyword(s):  
Experimental Data ◽  
Particle Size ◽  
Heat Capacity ◽  
Phase Transformation ◽  
Energy Distribution ◽  
Size Dependence ◽  
Important Application ◽  
Basic Premise ◽  
Phase Fluctuations ◽  
Bulk Data

In general, considerations about isothermal ensembles of nanoparticles assume that each one of the particles is at the same temperature. However, there are experimental indications that such an isothermal ensemble does not exist. Therefore, it is advised to analyze phenomena connected to the temperature distribution within such an ensemble. The detailed analysis presented in this work led to the assumption of a normal distribution of the energy within an ensemble of nanoparticles where basic properties of such an “isothermal” ensemble can be predicted. The width of the energy distribution decreases with increasing particle size. This particle size dependence of the energy per particle controls phase fluctuations in the vicinity of the transformation temperature. Additionally, applying the temperature profile of a phase transformation, it is possible to calculate the particle size distribution of the ensemble with a precision within the scattering range of the experimental data. This is the most important application of this analysis and coincidently a proof of the basic premise. The basic quantity determining the width of the energy distribution is the heat capacity of the particles. For these calculations, bulk data for the heat capacity were successfully applied. This leads to the conclusion that the data for heat capacity of nanoparticles are very close to the bulk values.

ChemInform Abstract: THE HEAT CAPACITY OF MANGANESE AND ZINC HEXAFLUOROSILICATES AT LOW TEMPERATURES

1985 ◽  
Vol 16 (46) ◽  
Author(s):  
K. E. HALSTEAD ◽  
D. J. SEDDON ◽  
L. A. K. STAVELEY ◽  
R. D. WEIR
Keyword(s):  
Heat Capacity ◽  
Low Temperatures

scholarly journals Dehumidified Air-Assisted Spray-Drying of Cloudy Beetroot Juice at Low Temperature

2021 ◽  
Vol 11 (14) ◽  
pp. 6578
Author(s):  
Aleksandra Jedlińska ◽  
Alicja Barańska ◽  
Dorota Witrowa-Rajchert ◽  
Ewa Ostrowska-Ligęza ◽  
Katarzyna Samborska
Keyword(s):  
Particle Size ◽  
Physicochemical Properties ◽  
Spray Drying ◽  
Low Temperatures ◽  
Beetroot Juice ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Tapped Density ◽  
Lower Loss ◽  
Better Than

This paper discusses the physicochemical properties of powders obtained by spray drying of cloudy beetroot juice, using dehumidified air in variants with or without carriers. The inlet air temperature was 130 °C or 90 °C, and the addition of the carriers was at a ratio of juice to carrier solids of 3:2. In the obtained powders, the following physicochemical properties were determined: water content and water activity, apparent density, loose and tapped density, porosity, flowability, particle size and morphology, and the content and retention of betalains. It was possible to dry cloudy beetroot juice without the use of carriers at low temperatures (90 or 130 °C). The 100% beetroot powders were characterized by satisfactory physicochemical properties, often better than those with carriers (including lower hygroscopicity and higher color saturation and yield). A lower loss of betalains was found for the powders with the addition of carriers. The best process yields were obtained for the powder without carriers at 130 °C and 90 °C.

scholarly journals Thermal Properties of Stabilized Zirconia at Low Temperatures

1985 ◽  
Vol 38 (4) ◽  
pp. 617 ◽  
Author(s):  
JG Collins ◽  
SJ Collocott ◽  
GK White
Keyword(s):  
Heat Capacity ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Low Temperatures ◽  
Linear Thermal Expansion Coefficient ◽  
Linear Thermal Expansion ◽  
Stabilized Zirconia ◽  
Elastic Data

The linear thermal expansion coefficient a from 2 to 100 K and heat capacity per gram cp from 0�3 to 30 K are reported for fully-stabilized zirconia containing a nominal 16 wt.% (9 mol.%) of yttria. The heat capacity below 7 K has been analysed into a linear (tunnelling?) term, a Schottky term centred at 1�2 K, a Debye term (e~ = 540 K), and a small T5 contribution. The expansion coefficient is roughly proportional to T from 5 to 20 K and gives a limiting lattice Griineisen parameter 'Yo ::::: 5, which agrees with that calculated from elastic data.

Heat Capacity of ThU Alloys at Low Temperatures

1974 ◽  
pp. 585-589 ◽  
Author(s):  
C. A. Luengo ◽  
J. M. Cotignola ◽  
J. Sereni ◽  
A. R. Sweedler ◽  
M. B. Maple
Keyword(s):  
Heat Capacity ◽  
Low Temperatures

scholarly journals Heat capacity of URu2−xOsxSi2 at low temperatures

2022 ◽  
Vol 105 (4) ◽  
Author(s):  
D. L. Kunwar ◽  
S. R. Panday ◽  
Y. Deng ◽  
S. Ran ◽  
R. E. Baumbach ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Low Temperatures
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