Molecular Mechanisms Causing Anomalously High Thermal Expansion of Nanoconfined Water

ChemPhysChem ◽  
2008 ◽  
Vol 9 (14) ◽  
pp. 1997-2001 ◽  
Author(s):  
Stephen H. Garofalini ◽  
Thiruvilla S. Mahadevan ◽  
Shuangyan Xu ◽  
George W. Scherer
Keyword(s):  
Thermal Expansion ◽  
Molecular Mechanisms ◽  
Nanoconfined Water ◽  
High Thermal Expansion

Novel Silicon-Elastomers for Advanced Soft Lithography

2006 ◽  
Vol 947 ◽  
Author(s):  
Kyung Choi
Keyword(s):  
Thermal Expansion ◽  
High Resolution ◽  
Soft Lithography ◽  
Materials Properties ◽  
Nano Scale ◽  
Thermal Expansion Coefficients ◽  
High Thermal Expansion ◽  
Expansion Coefficients

ABSTRACTHigh resolution pattern transfers in the nano-scale regime have been considerable challenges in ‘soft lithography’ to achieve nanodevices with enhanced performances. In this technology, the resolution of pattern integrations is significantly rely on the materials' properties of polydimethylsiloxane (PDMS) stamps. Since commercial PDMS stamps have shown limitations in nano-scale resolution soft lithography due to their low physical toughness and high thermal expansion coefficients, we developed stiffer, photocured PDMS silicon elastomers designed, specifically for nano-sized soft lithography and photopatternable nanofabrications.

High thermal expansion KAlSiO4 ceramic

1996 ◽  
Vol 31 (6) ◽  
pp. 1431-1433 ◽  
Author(s):  
T. Ota ◽  
T. Takebayashi ◽  
M. Takahashi ◽  
Y. Hikichi ◽  
H. Suzuki
Keyword(s):  
Thermal Expansion ◽  
High Thermal Expansion

A Novel SOFC/SOEC Sealing Glass with a Low SiO2Content and a High Thermal Expansion Coefficient

2017 ◽  
Vol 78 (1) ◽  
pp. 1739-1747 ◽  
Author(s):  
Ragnar Kiebach ◽  
Karsten Agersted ◽  
Philipp Zielke ◽  
Ilaria Ritucci ◽  
Mette Bybjerg Brock ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
High Thermal Expansion ◽  
Sealing Glass ◽  
High Thermal Expansion Coefficient

Preparation and Characterization of Thermally Compatible Leucite-Reinforced Dental Ceramics

2011 ◽  
Vol 308-310 ◽  
pp. 311-314
Author(s):  
Jin Wen ◽  
Shu Zhen Sun
Keyword(s):  
Thermal Expansion ◽  
Dental Ceramics ◽  
Dental Porcelain ◽  
Thermal Expansion Coefficients ◽  
High Thermal Expansion ◽  
Coprecipitation Technique ◽  
Thermal Compatibility ◽  
The Common ◽  
Expansion Coefficients

The high average thermal expansion required for thermal compatibility of dental porcelain with their substrate alloy is supplied by the mineral leucite (KAlSi2O6). In the research, the high thermal expansion coefficients phase leucite was prepared by coprecipitation technique. Three materials with formulae of K2O∶Al2O3∶SiO2= 1∶1∶x ( x=1.4, 2.0, 4.0 ) were investigated for differences in phase, thermal expansion. Unstoichiometric composition where K2O and Al2O3were added properly is advantage to leucite obtained. Coprecipitation processing produced fine leucite powder that would sinter at 1300°C, this temperature is about 200°C lower than of melting method. The average thermal expansion coefficients of leucite is 22.7×10-6/°Cfrom room temperature to 620°C,which is higher than the common porcelain. Changing in the leucite content of dental porcelain would results from thermal expansion coefficients of porcelain variation, which could be responsible for changes in porcelain-metal thermal compatibility.

High-Thermal-Expansion Polycrystalline Leucite Ceramic

1993 ◽  
Vol 76 (9) ◽  
pp. 2379-2381 ◽  
Author(s):  
Toshitaka Ota ◽  
Minoru Takahashi ◽  
Iwao Yamai ◽  
Hisao Suzuki
Keyword(s):  
Thermal Expansion ◽  
High Thermal Expansion

High thermal expansion of crystallized glasses in the system BaO–ZnO–NiO–SiO2

2015 ◽  
Vol 41 (10) ◽  
pp. 13310-13319 ◽  
Author(s):  
Christian Thieme ◽  
Christian Rüssel
Keyword(s):  
Thermal Expansion ◽  
High Thermal Expansion

Variation of the Expansion Coefficient of Nanofluids With Temperature: A Correction for Conductivity Data

2012 ◽  
Vol 3 (4) ◽  
Author(s):  
Efstathios E. Michaelides
Keyword(s):  
Thermal Conductivity ◽  
Thermal Expansion ◽  
Conductivity Data ◽  
Volumetric Fraction ◽  
Solid Materials ◽  
Strong Function ◽  
Temperature Changes ◽  
Thermal Expansion Coefficients ◽  
High Thermal Expansion ◽  
Expansion Coefficients

The two constituent phases of the nanofluids have thermal expansion coefficients that are significantly different. Moreover, the variability of the thermal expansion coefficients of fluids with temperature is significantly higher than that of solid materials. The mismatch of the thermal expansion coefficients creates changes of the volumetric fraction of solids with temperature changes. The changes can be significant with fluids that have high thermal expansion coefficients, such as refrigerants and fluids that operate close to their critical points. Since the thermal conductivity of nanofluids is a very strong function of the volumetric fraction of the nanoparticles, these changes of the volumetric fraction may cause significant effects on the thermal conductivity of the nanofluids, which must be accounted for in any design process.

scholarly journals New triple molybdate and tungstate Na5Rb7Sc2(XO4)9 (X = Mo, W)

2021 ◽  
Vol 8 (4) ◽  
pp. 20218412
Author(s):  
Tatyana S. Spiridonova ◽  
Aleksandra A. Savina ◽  
Evgeniy V. Kovtunets ◽  
Elena G. Khaikina
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Rietveld Method ◽  
Ceramic Technology ◽  
Chemical Transformations ◽  
X Ray Diffraction ◽  
X Ray ◽  
Triple Molybdate ◽  
High Thermal Expansion ◽  
New Compounds

New compounds of the composition Na5Rb7Sc2(XO4)9 (X = Mo, W) were obtained via the ceramic technology. The sequences of chemical transformations occurring during the formation of these compounds were established, and their primary characterization was performed. Both Na5Rb7Sc2(XO4)9 (X = Mo, W) were found to melt incongruently at 857 K (X = Mo) and 889 K (X = W). They are isostructural to Ag5Rb7Sc2(XO4)9 (X = Mo, W), Na5Cs7Ln2(MoO4)9 (Ln = Tm, Yb, Lu) and crystallize in the trigonal crystal system (sp. gr. R32). The crystal structures were refined with the Rietveld method using the powder X-ray diffraction data. The thermal expansion of Na5Rb7Sc2(WO4)9 was studied by high-temperature powder X-ray diffraction; it was shown that this triple tungstate belongs to high thermal expansion materials.

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