High pressure compression behaviour of bulk and nanocrystalline SnO<sub>2</sub>

Kholiya, Kuldeep; Pandey, Kailash N.

doi:10.1080/16583655.2019.1611369

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…Таким образом, несмотря на свою простоту, приближение (2) получило широкое признание и используется при расчете свойств не только для кристаллических веществ, но также для аморфных, жидких и наноструктурированных веществ [6][7][8][9][10][11][12]. Приближение (2) иногда также называют (αB rule) [8].…”

Section: Introductionunclassified

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Магомедов¹

2022

Физика Твердого Тела

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The properties of the FCC of the gold crystal were calculated using an analytical method (without computer modeling) in the temperature range: T = 10 – 1337 K and pressures: P = 0 – 110 GPa. The following properties were calculated: state equation, Debye temperature, first and second Gruneisen parameters, elastic modulus (BT), thermal expansion coefficient (p), isochoric (Cv) and isobaric (Cp) heat capacity, specific surface energy. Derivatives of these properties also have been calculated both by temperature along three isobars and by pressure along three isotherms. The obtained results showed good agreement with the other authors results. It was shown that there is a certain temperature TB in which the product pBT does not change during the crystal compression. At T > TB, the pBT function increases, and at T < TB, it decreases with an increase in pressure. For FCC-Au has been received TB =132 K. Показано, что изотермы производной модуля упругости по давлению B(P) пересекаются в точке: P = 21.58 GPa, B(P) = 7.43. It was shown that the isotherms of the baric derivative of elastic modulus B(P) intersect at the point: P = 21.58 GPa, and B(P) = 7.43. At P < 21.58 GPa, the B(P) function increases, and at P > 21.58 GPa, it decreases with increasing temperature. It was shown that the isotherm of the baric derivative of the isochoric heat capacity Cv(P) has a minimum, and the isotherm of the baric derivative of the isobaric heat capacity Cp(P) has both a minimum and a maximum. Based on the obtained dependencies, some approximations, which are used to calculate the properties of the crystal under high P-T conditions, have been analyzed.

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Section: Introductionunclassified

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Магомедов¹

2022

Физика Твердого Тела

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“…Thus, despite its simplicity, approximation (2) has received wide recognition and is used to calculate properties not only for crystalline substances, but also for amorphous, liquid and nanostructured substances [6][7][8][9][10][11][12]. The approximation (2) is sometimes also called as αB rule [8].…”

Section: Introductionmentioning

confidence: 99%

Study of the FCC-Au properties in a wide range of temperatures and pressures

Magomedov

2022

Physics of the Solid State

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The properties of the FCC-of the gold crystal were calculated using an analytical method (without computer modeling) in the temperature range: T=10-1337 K and pressures: P=0-110 GPa. The following properties were calculated: state equation, Debye temperature, first and second Gruneisen parameters, elastic modulus (BT), thermal expansion coefficient (αp), isochoric (Cv) and isobaric (Cp) heat capacity, specific surface energy. Derivatives of these properties also have been calculated both by temperature along three isobars and by pressure along three isotherms. The obtained results showed good agreement with the other authors results. It was shown that there is a certain temperature TB in which the product α_pBT does not change during the crystal compression. At T>TB, the α_pBT function increases, and at T<TB, it decreases with an increase in pressure. For FCC-Au has been received T_B=132 K. It was shown that the isotherms of the baric derivative of elastic modulus B'(P) intersect at the point: P>21.58 GPa, and B'(P)=7.43. At P<21.58 GPa, the C'v(P) function increases, and at P>21.58 GPa, it decreases with increasing temperature. It was shown that the isotherm of the baric derivative of the isochoric heat capacity C'v(P) has a minimum, and the isotherm of the baric derivative of the isobaric heat capacity C'_p(P) has both a minimum and a maximum. Based on the obtained dependencies, some approximations, which are used to calculate the properties of the crystal under high P-T-conditions, have been analyzed. Keywords: gold, pressure, elastic modulus, thermal expansion, heat capacity, Debye temperature, Gruneisen parameter, surface energy.

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“…Nanomaterials can be defined as a field that focuses on a material science-based approach to nanotechnology. Recently, research in material science and nanomaterials has produced new materials that have advantageous properties compared to the properties of bulk or conventional materials [3,4]. Moreover, the structure of these materials at the nanoscale (1-100 nm) often has unique thermal, mechanical, optical, and electronic properties [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

Hakamy

2020

Journal of Taibah University for Science

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This study investigated the effect of using calcium carbonate (CaCO 3) nanoparticles on the microstructural properties, flexural strength and fracture toughness of ceramic nanomaterials. The flexural strength and fracture toughness were evaluated for CaCO 3 nanoparticle contents of 1%, 2%, and 3% by weight of cement powder. The microstructural analyses from X-ray diffraction showed that nano-CaCO 3 improved the microstructure of nanocomposites because it reduces the tricalcium silicate and dicalcium silicate peaks and increases the calcium silicate hydrate products. Moreover, the results showed that the nanocomposites with 1 wt% nano-CaCO 3 exhibited the maximum flexural strength and fracture toughness compared to the other composites owing to the filler and nucleation effect of nano-CaCO 3. In addition, nano-CaCO 3 could resist the unstable micro-crack propagation in cement nanocomposites by filling the micro-cracks and voids. Future applications in synthesis or steel fiber-reinforced concrete or ceramic nanocomposites could benefit from the use of the analyses presented in this study.

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High pressure compression behaviour of bulk and nanocrystalline SnO₂

Cited by 6 publications

References 28 publications

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Study of the FCC-Au properties in a wide range of temperatures and pressures

Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

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High pressure compression behaviour of bulk and nanocrystalline SnO2

Cited by 6 publications

References 28 publications

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Изучение свойств ГЦК-Au в широком диапазоне температур и давлений

Study of the FCC-Au properties in a wide range of temperatures and pressures

Effect of CaCO3 nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

Contact Info

Product

Resources

About

High pressure compression behaviour of bulk and nanocrystalline SnO₂

Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites