Lithium and Ammonium Selenates

1995 ◽  
Vol 60 (6) ◽  
pp. 969-976 ◽  
Author(s):  
David Havlíček ◽  
Zdeněk Mička ◽  
Radka Boublíková
Keyword(s):  
Thermal Analysis ◽  
Dielectric Properties ◽  
Quaternary System ◽  
Analysis Data ◽  
Thermal Analysis Data ◽  
X Ray ◽  
Crystallization Region

The Li2SeO4-H2SeO4-H2O and (NH4)2SeO4-Li2SeO4-H2O systems were studied at 30 °C to obtain data for determining the conditions of formation of the compound (NH4)4LiH3(SeO4)4, whose characteristics correspond to those of substances possessing significant dielectric properties. The results were used to construct the pseudoternary LiNH4SeO4-NH4HSeO4 -H2O section in the quaternary system, which gave evidence that only (NH4)3H(SeO4)2 forms in the crystallization region of the compound sought. Attention was also paid to lithium ammonium selenate, which was characterized by its X-ray, spectral, and thermal analysis data.

scholarly journals Powders of metal borides obtained by the SHS method and low-temperature plasma

2018 ◽  
Vol 243 ◽  
pp. 00015
Author(s):  
Ilya Zhukov ◽  
Alexander Vorozhtsov ◽  
Vladimir Promakhov ◽  
Yana Dubkova ◽  
Alexander Zhukov ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Titanium Boride ◽  
Analysis Data ◽  
High Energy ◽  
Thermal Analysis Data ◽  
Energy Materials ◽  
Boron Powder ◽  
Temperature Plasma ◽  
Metal Borides ◽  
Shs Method

This paper introduces principle possibility of producing aluminum and titanium boride predetermined morphology using the SHS method and plasma processing. Thermal analysis data for synthesized boride powders in comparison with boron powder and nano-sized aluminum are presented It was found that the synthesized metal borides, according to the thermal analysis data, are promising as a fuel in high-energy materials: the oxidation state of AlB2 is ~ 80%, at a degree of boron oxidation ~ 20%, aluminum ~ 67%.

scholarly journals Fire Protection of Building Constructions with the Use of Fire-Retardant Intumescent Compositions

Buildings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 185
Author(s):  
Tatiana Eremina ◽  
Dmitry Korolchenko
Keyword(s):  
Thermal Analysis ◽  
Physicochemical Properties ◽  
Fire Protection ◽  
Orthophosphoric Acid ◽  
Fire Retardant ◽  
Analysis Data ◽  
Polymer Composition ◽  
Thermal Analysis Data ◽  
Fire Retardant Properties ◽  
Modifying Additive

The influence of basic components of intumescent paint on fire protection properties is studied. The resulting changes in properties are assessed by the intumescence coefficient and thermal analysis data. Influence of the binder polymer composition on fire protection properties under the same conditions was evaluated, quantitatively using the example of fire-retardant water-dispersion paint; the best result was obtained in the formulation based on vinyl acetate copolymers. The brands of ammonium polyphosphate (PFA) from different manufacturers were investigated under the same conditions. The results of the thermal analysis and testing of the physicochemical properties of the samples on various PFAs are presented, with conclusions about their influence on the fire-retardant properties of the paint. The results of the thermal analysis of the influence of orthophosphoric acid, as a modifying additive, on the fire-retardant properties of the paint are presented.

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