Non-Crystalline Chalcogenicides (Solid-State Science and by M.A. Popescu

By M.A. Popescu

The earliest experimental facts on an oxygen-free glass were released via Schulz-Sellack in 1870 [1]. afterward, in 1902, wooden [2], in addition to Meier in 1910 [3], performed the 1st researches at the optical houses of vitreous selenium. The curiosity within the glasses that show transparency within the infrared zone of the optical spectrum rose in the beginning of the 20th century. to begin with have been investigated the heavy steel oxides and the transparency restrict used to be prolonged from (the case of the classical oxide glasses) as much as wavelength. with the intention to expand this restrict above the scientists attempted the chemical compositions in keeping with the weather of the 6th workforce of the Periodic desk, the chalcogens: sulphur, selenium and tellurium. The systematic study within the box of glasses in accordance with chalcogens, known as chalcogenide glasses, began on the center of our century. In 1950 Frerichs [4] investigated the glass and released the paper: “New optical glasses obvious in infrared as much as 12 . numerous years later he began the examine of the selenium glass and ready a number of binary glasses with sulphur [5]. Glaze and colleagues [6] constructed in 1957 the 1st process for the practise of the glass on the business scale, whereas Winter-Klein [7] released reviews on a number of chalcogenides ready within the vitreous country.

Show description

Read or Download Non-Crystalline Chalcogenicides (Solid-State Science and Technology Library) PDF

Best inorganic books

Hybrid Materials: Synthesis, Characterization, and Applications

Hybrid fabrics have at the moment an outstanding influence on a variety of destiny advancements together with nanotechnology. This publication provides an summary in regards to the types of fabrics, basically dependent into synthesis, characterization and functions. an ideal start line for everybody attracted to the sphere, but additionally for the professional as a resource of top of the range info.

Battery Hazards and Accident Prevention

This publication is ready the best way to keep away from the injuries and accidents which could happen while batteries are abused or mishandled. it's the first e-book to deal in particular with this topic in a fairly finished demeanour obtainable to readers starting from ordinary shoppers to technical experts. Batteries and battery methods are defined in enough aspect to let readers to appreciate why and the way batteries reason injuries and what will be performed to avoid them.

Fluorocarbon and Related Chemistry: Volume 3 (Specialist Periodical Reports)

Professional Periodical studies offer systematic and designated assessment assurance of growth within the significant components of chemical learn. Written by means of specialists of their professional fields the sequence creates a distinct carrier for the lively learn chemist, providing average severe in-depth debts of development specifically components of chemistry.

The Chemistry of Explosives (RSC Paperbacks)

This concise, easy-to-read e-book outlines the fundamental rules had to comprehend the chemical mechanisms of explosion. protecting detonation, deflagration, initiation, the most recent theories at the construction of ""hotspots"", thermochemistry, thermodynamics and kinetics, the textual content contains unique formulations and reactions provided with thermochemical calculations to help figuring out.

Extra resources for Non-Crystalline Chalcogenicides (Solid-State Science and Technology Library)

Sample text

ALKALI-CHALCOGENIDE SYSTEMS The first data on the glass formation in the alkali-chalcogenide systems were published in 1982 for the case of Cs-Se binary system [144]. Minaev [146] has calculated the ability to form glasses in the alkali metal-chalcogen systems on the basis of an original theory of glass function: the so-called "energostructural theory". The theory comprises a structural model of the glass and allows for drawing conclusions on the relation between various chemical-bonding forces, which act, into the network.

Cubic structure and Å. 30). 65 Å [166], respectively. In the system Ge-Sb-S the glass formation region is not very large. 31a) [167]. 30. The projection in the plane (110) of the structure. The glass of composition situated on the boundary of the glass formation domain for low quenching rates, has been used in the experiment “Crystal” placed on the spatial complex “Soyuz-Salyut 6”. There was demonstrated that the glass prepared in zero gravitation is more resistant to crystallisation than the glass prepared in normal gravitation conditions and, in the first case, a considerable enlargement of the vitrification region it is expected [168].

The most advanced character is realised in and this feature allows supposing a tetrahedral co-ordination of selenium around phosphorus, as opposite to the trigonal co-ordination in In do appear P-P bonds and their number rises when the composition is shifted towards and then to The molecules and are formed without difficulty in these alloys. In the system P-Se have been obtained amorphous films with the thickness of in a large compositional range, by deposition from vapour phase on solid substrate [60].

Download PDF sample

Rated 4.73 of 5 – based on 48 votes