Synthesis and properties of residual graphite nitrate obtained by treatment of graphite nitrate with water

The possibility of obtaining residual graphite nitrate by water treatment of graphite nitrate and its subsequent drying was studied. The expansion coefficients were determined in the temperature range 500–900°C with a step of 100°C for the samples obtained.     

Influence Exerted by Pyrite Impurity in the Initial Graphite on Properties of Residual Graphite Hydrosulfates

The influence exerted by the particle size and the distribution of sol impurities in the initial graphite, and also by pyrite additives, on the properties of residual graphite hydrosulfates synthesized by oxidation in the CrO₃-H₂SO₄ system was studied.     

Synthesis and Thermal Swelling of Residual Graphite Hydrosulfates Obtained Using the Na2Cr2O7-H2SO4 System

The influence exerted by the conditions of synthesis of residual graphite hydrosulfate in a system constituted by concentrated sulfuric acid and saturated aqueous solution of sodium dichromate on the properties of the final product was studied in a wide range of reagent consumptions. The swelling coefficient and the loss of the product were analyzed as functions of the intercalate content in the product.     

A new method for production of composites consisting of expanded graphite and amorphous carbon

A new method was developed for production of composites constituted by expanded graphite and amorphous carbon from residual graphite hydrosulfate and a precursor of amorphous carbon, sucrose.     

Specific features of preparing residual graphite hydrosulfate

The hydrolysis of graphite hydrosulfate prepared in the system aqueous solution of sodium dichromate-sulfuric acid was studied, and the composition of gases evolving from the solid phase during the hydrolysis was determined. The effects of the duration of the graphite hydrosulfate hydrolysis on the expansion factor and also on the morphology and particle size of the final product, residual graphite hydrosulfate, was studied.     

Synthesis and Properties of Expandable Residual Graphite Hydrosulfate Obtained in the System CrO3-H2SO4

The fundamental aspects of synthesis of expandable residual graphite hydrosulfate with the use of an oxidizing system CrO₃-H₂SO₄ at ultralow consumption of the reagents and their separate introduction into the reaction mass were studied. The dependence of the expansion ratio of the samples obtained on the content of intercalant and expansion temperature was analyzed.     

Synthesis and Properties of Thermally Expandable Residual Graphite Hydrosulfite Obtained in the System HNO3-H2SO4

Synthesis of bloating residual graphite hydrosulfide with the use of an oxidizing system, fuming nitric acid-concentrated sulfuric acid, was studied at ultralow expenditure of reagents and their separate introduction into the reaction mass. Important parameters of the process were revealed and their effect on the properties of the target product was determined. Ways to diminish to the maximum possible extent the adverse influence of by-products formed in the stage of graphite oxidation on the properties of the target product were found.