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Process for obtaining a glass-ceramic material that is optically transparent in the infrared

An optically transparent and infrared radiation technology, applied in glass molding, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of low glass, low thermal conductivity of quartz tubes, unfavorable crystallization stability, etc., and achieve the effect of time optimization

Active Publication Date: 2013-12-11
法国国家科学研究院 +1
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  • Abstract
  • Description
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Problems solved by technology

[0013] Another disadvantage related to the thermal amorphization process is the relatively low thermal conductivity of quartz tubes, which limits: firstly, the range of glass compositions that can be envisaged during synthesis, and secondly, the size of the manufactured glass
In fact, the low thermal conductivity of quartz tubes is not conducive to obtaining sufficiently large quenching rates for the preparation of some glass compositions, especially for glasses with low crystallization stability and large diameters

Method used

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  • Process for obtaining a glass-ceramic material that is optically transparent in the infrared

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Embodiment Construction

[0048] figure 1 is a flowchart 100 of a particular embodiment of the method according to the invention.

[0049] The method comprises the synthesis of vitreous materials optically transparent to infrared, electromagnetic radiation, wherein the amorphous phase is obtained by adding mechanical energy.

[0050] In the following description, "vitreous material" is understood to mean chalcogenide-based glasses or glass ceramics which have transparency in the infrared spectrum.

[0051] Step 110 introduces a set of initial elements 115 into a planetary ball mill for mechanical processing. The starting elements 115 constitute the basic products (in powder or block form) required to obtain vitreous materials and include:

[0052] - one or more metal elements selected from germanium, arsenic, antimony, gallium, tin, indium, usually present in a mole percent of 0 to 35; and

[0053] - One or more chalcogenide elements selected from sulfur, selenium, tellurium, usually present in a mo...

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Abstract

A process is proposed for obtaining a glassy material that is optically transparent to infrared radiation. Such a process comprises: a step (120) of amorphization, by mechanosynthesis, of an assembly of starting elements comprising at least one metallic element and at least one chalcogenide element, making it possible to form an amorphous powder (125); a step (130) of hot densification, in a mould of predetermined dimensions, of the amorphous powder, making it possible to obtain a glass (135); and heat treatment, carried out during or after the hot densification step, in which the glass is heated to a temperature at which a portion of the glass is converted from an amorphous state to a crystalline state, making it possible to obtain, after cooling, a glass-ceramic (145).

Description

1. Technical field [0001] The invention relates to the field of optical materials, which are used to transmit infrared electromagnetic radiation. [0002] In particular, the present invention relates to a technique for obtaining vitreous materials such as glass or glass ceramics, which are based on chalcogenides and have transparency to infrared radiation. [0003] Such materials have many applications, especially in the field of thermal imaging, and are especially suitable for the design of passive optical components of infrared systems (thermal cameras, thermal sensors, etc.), using active light with optical properties such as emissive or nonlinear Manufacture of active components such as infrared laser devices, optical switches or optical amplifiers etc. 2. Background technology [0004] Chalcogenide glasses, used for example as infrared transmissive materials, currently constitute an economically valuable alternative to single-crystal germanium for the manufacture of bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B19/06C03B32/02C03C3/32C03C10/00
CPCC03B19/063C03B32/02C03B2201/86C03C3/321C03C10/00C03C3/323C03C4/10
Inventor 洛朗·卡尔维茨张向华马修·休伯特盖尔·德雷兹尔
Owner 法国国家科学研究院
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