Electrodeposited inorganic separators Second quarterly report, 15 Jul. - 15 Oct. 1965

Thin electrodeposited films of calcium and magnesium hydroxide as separators in silver-cadmium cell

Electrodeposited inorganic separators for alkaline batteries

Coating electrodes of silver-cadmium cells with thermostable electrodeposits of calcium hydroxide or magnesium hydroxide reduces silver migration and increases cell life. Absence of organic matter enables assembled cells to be sterilized without oxidation of the material of the separators

Production of magnesium oxide polyhydrates as fillers for electrorheological suspensions

The influence of the production conditions of magnesium hydroxide on its composition, in particular the content of the non-structural “superstochiometric” water, which can be localized in the interlayer space of the layered structure. The conditions of generation and formation of the magnesium hydroxide crystal structure of brucite (nemalite) type, containing up to 8 wt % “superstochiometric” water, which is removed by heating up to 300–350?C. Observed the formation of basic magnesium carbonate using distilled water containing dissolved carbon dioxide. When used distilled water containing dissolved carbon dioxide, magnesium basic carbonates are formed

Fire retardant action of mineral fillers

Endothermically decomposing mineral fillers, such as aluminium or magnesium hydroxide, magnesium carbonate, or mixed magnesium/calcium carbonates and hydroxides, such as naturally occurring mixtures of huntite and hydromagnesite are in heavy demand as sustainable, environmentally benign fire retardants. They are more difficult to deploy than the halogenated flame retardants they are replacing, as their modes of action are more complex, and are not equally effective in different polymers. In addition to their presence (at levels up to 70%), reducing the flammable content of the material, they have three quantifiable fire retardant effects: heat absorption through endothermic decomposition; increased heat capacity of the polymer residue; increased heat capacity of the gas phase through the presence of water or carbon dioxide. These three contributions have been quantified for eight of the most common fire retardant mineral fillers, and the effects on standard fire tests such as the LOI, UL 94 and cone calorimeter discussed. By quantifying these estimable contributions, more subtle effects, which they might otherwise mask, may be identified

Epsomite as flame retardant treatment for wood: Preliminary study

The effect of epsomite as flame retardant for wood has been investigated and compared with a commercial boron salt. Both flame retardants have been introduced into wood samples by vacuum impregnation. Epsomite is a hydrated sulphate salt with a water solubility of 731 g L-1 at room temperature. Thanks to this high solubility it was possible to obtain elevated epsomite loadings in comparison with the borax salt. Flame retardancy was evaluated by means of the limiting oxygen index, the dripping test and the exposition to a direct flame (Bunsen test). The results showed that the addition of epsomite increases the limiting oxygen index, delays the time to ignition and the evolution of the temperatures trough the wood. © 2016 Elsevier LtdPeer ReviewedPostprint (author's final draft

Electrodeposited inorganic separators First quarterly report, 15 Apr. - 15 Jul. 1965

Electrodeposited thin films of calcium and magnesium hydroxides as separators in silver- cadmium battery for increased thermostability and reduced silver migratio

Steam turbine blade deposits; a report of an investigation conducted by the Engineering experiment station, University of Illinois, in cooperation with the Utilities research commission

On cover: University of Illinois bulletin, v.43, no. 59.Bibliography: p. 80-83

Structure and elastic properties of Mg(OH)2_2 from density functional theory

The structure, lattice dynamics and mechanical properties of the magnesium hydroxide have been investigated with static density functional theory calculations as well as \it {ab initio} molecular dynamics. The hypothesis of a superstructure existing in the lattice formed by the hydrogen atoms has been tested. The elastic constants of the material have been calculated with static deformations approach and are in fair agreement with the experimental data. The hydrogen subsystem structure exhibits signs of disordered behaviour while maintaining correlations between angular positions of neighbouring atoms. We establish that the essential angular correlations between hydrogen positions are maintained to the temperature of at least 150 K and show that they are well described by a physically motivated probabilistic model. The rotational degree of freedom appears to be decoupled from the lattice directions above 30K