Kinetic analysis of thermal expansion of natural zeolite in temperature interval from 700 °C to 1100 °C during isothermal heating

2018 ◽  
Author(s):  
Filip Obert ◽  
Anton Trník
Keyword(s):  
Thermal Expansion ◽  
Kinetic Analysis ◽  
Temperature Interval ◽  
Natural Zeolite ◽  
Isothermal Heating

X-ray Scattering Measurements of the Ag(111) Surface Thermal Expansion

2001 ◽  
Vol 678 ◽  
Author(s):  
Cristian E. Botez ◽  
William C. Elliott ◽  
Paul F. Miceli ◽  
Peter W. Stephens
Keyword(s):  
Molecular Dynamics ◽  
Thermal Expansion ◽  
Molecular Dynamics Simulations ◽  
Temperature Interval ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Measurements ◽  
The One ◽  
Dynamics Simulations

AbstractWe have used synchrotron X-ray diffraction to study the thermal expansion of the Ag(111) surface. Throughout the temperature interval between 300 and 1100K, we observed that the separation between the first and the second atomic layers at the surface, 12 d, differs from its bulk counterpart, d, by less than 1%, indicating that the thermal expansion at the surface is similar to the one in the bulk. This result represents the first experimental confirmation of the predictions from molecular dynamics simulations, which indicate a small enhancement of the anharmonic effects at this surface.

scholarly journals Thermophysical Properties of Kaolin–Zeolite Blends up to 1100 °C

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 165
Author(s):  
Ján Ondruška ◽  
Tomáš Húlan ◽  
Ivana Sunitrová ◽  
Štefan Csáki ◽  
Grzegorz Łagód ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Thermal Diffusivity ◽  
Thermophysical Properties ◽  
Natural Zeolite ◽  
Laser Flash ◽  
Optimal Amount ◽  
Ceramic Samples ◽  
Zeolite Content ◽  
Negative Effect ◽  
Cylindrical Samples

In this study, the thermophysical properties such as the thermal expansion, thermal diffusivity and conductivity, and specific heat capacity of ceramic samples made from kaolin and natural zeolite are investigated up to 1100 °C. The samples were prepared from Sedlec kaolin (Czech Republic) and natural zeolite (Nižný Hrabovec, Slovakia). Kaolin was partially replaced with a natural zeolite in the amounts of 10, 20, 30, 40, and 50 mass%. The measurements were performed on cylindrical samples using thermogravimetric analysis, a horizontal pushrod dilatometer, and laser flash apparatus. The results show that zeolite in the samples decreases the values of all studied properties (except thermal expansion), which is positive for bulk density, porosity, thermal diffusivity, and conductivity. It has a negative effect for thermal expansion because shrinkage increases with the zeolite content. Therefore, the optimal amount of zeolite in the sample (according to the studied properties) is 30 mass%.

An X-ray determination of the thermal expansion of the intermetallic compound Ni3Zr

1983 ◽  
Vol 16 (6) ◽  
pp. 645-646 ◽  
Author(s):  
S. K. Shadangi ◽  
S. C. Panda ◽  
S. Bhan
Keyword(s):  
Thermal Expansion ◽  
Intermetallic Compound ◽  
Least Squares ◽  
Temperature Interval ◽  
X Ray ◽  
Least Squares Fitting ◽  
Thermal Expansion Coefficients ◽  
Expansion Coefficients ◽  
Ray Methods

The lattice spacings of the intermetallic compound Ni3Zr have been measured by X-ray methods in the temperature interval 298–1033 K using a Debye–Scherrer camera. In all the cases the measured lattice spacings have been found to increase non-linearly with temperature and the dependence has been expressed by a polynomial of second degree from the least-squares fitting of the data. The thermal expansion coefficients for both parameters have been found to decrease with increase in temperature.

Colossal negative thermal expansion with an extended temperature interval covering room temperature in fine-powdered Mn0.98CoGe

2016 ◽  
Vol 109 (24) ◽  
pp. 241903 ◽  
Author(s):  
Jianchao Lin ◽  
Peng Tong ◽  
Kui Zhang ◽  
Haiyun Tong ◽  
Xinge Guo ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Temperature Interval ◽  
Room Temperature ◽  
Negative Thermal Expansion

Viscosity of Dental Porcelain as a Function of Temperature

1979 ◽  
Vol 58 (10) ◽  
pp. 2001-2004 ◽  
Author(s):  
R.L. Bertolotti ◽  
J.E. Shelby
Keyword(s):  
Thermal Expansion ◽  
Residual Stresses ◽  
Temperature Interval ◽  
Thermal History ◽  
Viscosity Measurement ◽  
Thermal Expansion Mismatch ◽  
Small Temperature ◽  
Dental Porcelain ◽  
Representative Data ◽  
History Of

A method for viscosity measurement is described and representative data are given for opaque, gingival, and incisal porcelains. The significance of viscosity in annealing and in stress development due to thermal expansion mismatch is discussed. Thermal history of the porcelain is shown to be important only over a relatively small temperature interval in affecting residual stresses.

Thermal expansion of beryllium oxide in the temperature interval 20–1550°C

2014 ◽  
Vol 52 (4) ◽  
pp. 536-540 ◽  
Author(s):  
Yu. M. Kozlovskii ◽  
S. V. Stankus
Keyword(s):  
Thermal Expansion ◽  
Temperature Interval ◽  
Beryllium Oxide
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