Hydrophilic expanded graphite-magnesium nitrate hexahydrate composite phase change materials: Understanding the effect of hydrophilic modification on thermophysical properties

2019 ◽  
Vol 43 (3) ◽  
pp. 1121-1132 ◽  
Author(s):  
Yue Zhang ◽  
Jinhe Sun ◽  
Guixiang Ma ◽  
Zhao Wang ◽  
Shaolei Xie ◽  
...  
Keyword(s):  
Phase Change ◽  
Thermophysical Properties ◽  
Phase Change Materials ◽  
Expanded Graphite ◽  
Magnesium Nitrate ◽  
Nitrate Hexahydrate ◽  
Hydrophilic Modification ◽  
Magnesium Nitrate Hexahydrate ◽  
Composite Phase Change Materials

scholarly journals Corrosive effects of nitrate-containing phase change materials used with copper

2016 ◽  
Vol 9 (2) ◽  
pp. 75-83 ◽  
Author(s):  
Vladimír Danielik ◽  
Peter Šoška ◽  
Katarína Felgerová
Keyword(s):  
Corrosion Rate ◽  
Phase Change ◽  
Phase Change Materials ◽  
Corrosion Behaviour ◽  
Calcium Nitrate ◽  
Magnesium Nitrate ◽  
Nitrate Hexahydrate ◽  
Calcium Nitrate Tetrahydrate ◽  
Magnesium Nitrate Hexahydrate ◽  
Nitrate Tetrahydrate

Abstract The paper presents the results of a study on the corrosion behaviour of copper (EN CW004A) in five possible phase change materials (PCMs): magnesium nitrate hexahydrate pure and with an addition of Mg(OH)2 (0.5 wt. %) or Sr(OH)2 (0.5 wt. %) at 90 °C, calcium nitrate tetrahydrate at 50 °C and a mixture of magnesium nitrate hexahydrate and calcium nitrate tetrahydrate (1:1 mass ratio) at 72 °C. The corrosion rate of copper samples is low except for the use of Mg(NO3)2 · 6H2O with/without an addition of Mg(OH)2. The lowest corrosion rate was observed for the mixture Mg(NO3)2 · 6H2O—Ca(NO3)2 · 4H2O (1:1), and it was ca six times lower than that of pure magnesium nitrate hexahydrate.

Densities of nitrate hydrates used as phase change materials

2017 ◽  
Vol 10 (2) ◽  
pp. 79-83
Author(s):  
Vladimír Danielik ◽  
Dominika Szendreiová
Keyword(s):  
Phase Change Materials ◽  
Liquid Mixtures ◽  
Liquid System ◽  
Zinc Nitrate ◽  
Magnesium Nitrate ◽  
Zinc Nitrate Hexahydrate ◽  
Nitrate Hexahydrate ◽  
Temperature Dependency ◽  
Magnesium Nitrate Hexahydrate ◽  
Different Temperatures

AbstractTemperature dependency of densities of the liquid system magnesium nitrate hexahydrate - zinc nitrate hexahydrate was measured. Densities of liquid mixtures were experimentally measured at different temperatures by a method using submersible corpuscle. Based on the obtained data, temperature dependence on the density was obtained. A model describing the density in the whole concentration range very well was created.

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