Open AccessВлияние размера частиц и удельной поверхности на определение плотности нанокристаллических порошков сульфида серебра Ag-=SUB=-2-=/SUB=-S
Author(s) -
С.И. Садовников,
А.И. Гусев
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.05.45780.313
Subject(s) - gas pycnometer , helium , particle size , materials science , adsorption , diffraction , particle (ecology) , sulfide , particle density , deposition (geology) , analytical chemistry (journal) , mineralogy , metallurgy , chemistry , volume (thermodynamics) , chromatography , thermodynamics , optics , organic chemistry , paleontology , physics , oceanography , sediment , biology , geology
The effect of the particle size and specific surface area of silver sulfide powders on their density measured by the helium pycnometry method has been studied. Powders with different average particle sizes have been synthesized by hydrochemical deposition. The particle size of the silver sulfide powders has been determined by the Brunauer–Emmett–Teller method according to molecular nitrogen adsorption isotherms and, in the case of fine powders, by X-ray diffraction analysis according to diffraction reflection broadening. It has been shown that the density of the fine powders measured by helium pycnometry is underestimated compared with the true density, owing to the adsorption of helium by the highly developed surface of these powders.