Kinetics of the dissolution of PSe/sub x/Te/sub y/ glasses in sodium hydroxide solutions

Journal Article · Thu Jan 20 00:00:00 EST 1983 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5521987

Orlova, G M; Funtikov, V A; Chudakovskaya, N M

In the present work, a study was carried out on the effect of solution concentration and temperature and the content of tellurium in PSe/sub 2.5/Te/sub x/ and PeSe/sub 4/Te/sub x/ glasses on their rate of dissolution in NaOh solutions. The glassy alloys were prepared by melting of the elemental substituents of semiconductor purity in vacuum. The melts were maintained for 4 h at a maximum temperature of 700/sup 0/C and tempered in the air. A preliminary study showed that PSe/sub x/Te/sub y/ glasses are virtually insoluble in dilute and concentrated nonoxidizing acid solutions. A study of the kinetic behavior of the dissolution of PSe/sub 2.5/PSe/sub 4/, PSe/sub 2.5/Te/sub x/, and PSe/sub 4/Te/sub x/ glasses with a tellurium content up to 40 at. % in NaOH solutions showed that the introduction of tellurium into phosphorus selenide glasses leads to a significant increase in their chemical stability. The dissolution of PSe/sub 2.5/, PSe/sub 2.5/Te/sub 0.4/, PSe/sub 4/Te/sub 0.6/, and PSe/sub 4/Te/sub 1.3/ glasses is limited by the rate of a heterogeneous chemical reaction with 16-17 kcal/mole activation energy. An increase in the concentration of both selenium and tellurium (above 20 at. %) in phosphorus selenide glasses is accompanied by loss of the molecularly dispersed nature of the dissolution process.

• Research Organization: Zhdanov Leningrad State University, USSR
• OSTI ID: 5521987
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 55:8; Other Information: Translated from Zh. Prikl. Khim.; 55: No. 8, 1746-1749(Aug 1982)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
PHOSPHORUS COMPOUNDS
DISSOLUTION
SELENIDES
SEMICONDUCTOR MATERIALS
TELLURIDES
ACTIVATION ENERGY
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
GLASS
HIGH TEMPERATURE
SELENIUM
SODIUM HYDROXIDES
ALKALI METAL COMPOUNDS
CHALCOGENIDES
ELEMENTS
ENERGY
HYDROGEN COMPOUNDS
HYDROXIDES
KINETICS
MATERIALS
OXYGEN COMPOUNDS
REACTION KINETICS
SELENIUM COMPOUNDS
SEMIMETALS
SODIUM COMPOUNDS
TELLURIUM COMPOUNDS
400201* - Chemical & Physicochemical Properties
360600 - Other Materials