Synthesis, Crystal Structure and Thermal Decomposition of a New Energetic Potassium Salt of dihydridobis(3-nitro-1,2,4-triazolyl) Borate

A new energetic organic potassium salt of dihydridobis (3-nitro-1,2,4-triazolyl) borate was synthesized from 3-nitro-1,2,4-triazole and potassium borohydride at 110 °C, and structurally characterized by elemental analysis, IR spectra, 13C NMR and singlecrystal X-ray diffraction. Results show that the crystal belongs to monoclinic system with space group of p21 / C and cell parameters of a = 10.335 (8) Å, B = 10.812 (8) Å, C = 9.821 (8) Å, α = 90 ˚, β = 106.470 (13), γ = 90 °, z = 4. Its crystal density is 1.755g/cm3. Thermal properties were studied with TG-DTA and DSC. There was only one sharp decomposition peak temperature of 270 °C at the heating rate of 10 °C/ min-1. The activation energies EK = 48.0kJ/mol-1 and EO = 49.8kJ/mol-1 were calculated by the Kissinger method and Ozawa method respectively (CCDC: 1975139).

Preparation of Ni nanoparticles by liquid-phase reduction to fabricate metal nanoparticle–polyimide composite films

Nickel-nanoparticle-containing polyimide composite films were prepared by liquid-phase reduction of Ni2+ ions with potassium borohydride (KBH4). This preparation method could be repeated to increase the number of the nanoparticles in the films.

Preparation of Soft Magnetic Fe-Ni-Pb-B Alloy Nanoparticles by Room Temperature Solid-Solid Reaction

The Fe-Ni-Pb-B alloy nanoparticles was prepared by a solid-solid chemical reaction of ferric trichloride, nickel chloride, lead acetate, and potassium borohydride powders at room temperature. The research results of the ICP and thermal analysis indicate that the resultants are composed of iron, nickel, lead, boron, and PVP, and the component of the alloy is connected with the mole ratio of potassium borohydride and the metal salts. The TEM images show that the resultants are ultrafine and spherical particles, and the particle size is about a diameter of 25 nm. The largest saturation magnetization value of the 21.18 emu g−1is obtained in the Fe-Ni-Pb-B alloy. The mechanism of the preparation reaction for the Fe-Ni-Pb-B multicomponent alloys is discussed.