Autor:	P. B. Baskov, V. V. Sakharov, V. B. Bateev, V. V. Shatalov, V. D. Fedorov, M. L. Kotsar
Rok vydání:	2001
Předmět:	Optical fiber Materials science Fabrication General Chemical Engineering Glass fiber Metals and Alloys Analytical chemistry Mineralogy Laser law.invention Inorganic Chemistry chemistry.chemical_compound chemistry law Impurity Vaporization Materials Chemistry Sublimation (phase transition) Fluoride
Zdroj:	Inorganic Materials. 37:1085-1091
ISSN:	0020-1685
Popis:	The separation coefficients of ZrF4(HfF4) and metal fluoride impurities in the process of vacuum sublimation between 900 and 1200 K in the molecular vaporization regime were calculated. The separation coefficients were found to decrease in the order CrF2> MnF2> NiF2> CoF2> MnF3> FeF2> AlF3> CrF3> CuF2> FeF3 . The conditions for purification of ZrF4and HfF4by vacuum sublimation were optimized. The total impurity content in both fluorides was found to increase with the product of the evaporation rate per unit area and the degree of evaporation. Fe was found to be the most difficult-to-remove impurity in ZrF4and HfF4 . The production rate of the sublimating plant is about 100 kg/year of ZrF4and HfF4sublimates. ZrF4was used to prepare optical fibers for laser applications and noncontact fiber sensors for monitoring the composition and temperature of liquid radioactive waste. Fluorohafnate glasses were used to fabricate radiation-resistant scintillating modules of dimensions 20 × 30 × 150 mm, weighing ≤0.5 kg.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::111bb1e971bd46908fbd1e068623f3b3 https://doi.org/10.1023/a:1012399615098 Zobrazit plný text záznamu Full text from SpringerLink