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Tellurium-based sulfur series infrared glass and preparation method thereof

An infrared glass and chalcogenide technology, applied in the field of infrared glass materials, can solve the problems of narrow available spectral range and large influence of multi-phonon absorption, etc., and achieve the effects of increased available spectral range, suitable transition temperature, and good thermal stability

Active Publication Date: 2012-02-15
宁波阳光和谱光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the infrared transmission wavelength of the current infrared glass material is relatively short, and the cut-off edge of the infrared transmission band cannot reach 25 μm, so that the available spectral range of far-infrared spectrum detection and biosensing technologies is narrow, and the problem of multi-phonon absorption has a greater impact , it is difficult to meet the ever-changing technical requirements in the fields of infrared sensing, life detection, military remote sensing and far-infrared space

Method used

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  • Tellurium-based sulfur series infrared glass and preparation method thereof
  • Tellurium-based sulfur series infrared glass and preparation method thereof
  • Tellurium-based sulfur series infrared glass and preparation method thereof

Examples

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Embodiment 1

[0023] A tellurium-based chalcogenide infrared glass, the glass composition is: 20mol% In 2 Te 6 , 60mol% GeTe 4 And 20mol%AgI, according to this component requirement, calculate the weight percent that needs AgI raw material to be 7.88%, the weight percent of elemental raw material In is 7.71%, the weight percent of Ge is 7.31%, the weight percent of Te is 77.10%, press Weight ratio Silver halide with a purity of ≥99.9%, indium, germanium and tellurium with a purity of ≥99.99%, are mixed to form a glass mixture, and 0.1wt% magnesium strips are added to the glass mixture: 0.1wt% is is the weight percent concentration of magnesium strips in the glass mixture. Magnesium strips can react with oxides in raw materials to remove oxygen impurities in raw materials and play a role in purifying raw materials. At the same time, magnesium is not mixed with glass melting; The mixture is put into one of the quartz tubes of the H-shaped double-tube quartz ampoule. The H-shaped double-tube...

Embodiment 2

[0027]A tellurium-based chalcogenide infrared glass, which is basically the same as in Example 1, except that the composition of the glass is: 15mol% In 2 Te 6 , 70mol% GeTe 4 And 15mol% AgBr, so the weight percentage of AgBr raw material is 4.82%, the weight percentage of elemental raw material In is 5.88%, the weight percentage of Ge is 8.68%, the weight percentage of Te is 80.62%, and the vacuum degree in the ampoule can be met in addition Requirements≤3×10 -3 Pa, the cold end temperature of distillation purification is 20°C.

Embodiment 3

[0029] A tellurium-based chalcogenide infrared glass, which is basically the same as in Example 1, except that the glass has a composition of: 10mol% In 2 Te 6 , 45mol% GeTe 4 and 45mol% AgBr, the weight percent calculation of specific raw materials is a conventional conversion method, which will not be described here.

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Abstract

The invention discloses tellurium-based sulfur series infrared glass. The glass comprises the following components: 10 to 20 mole percent of In2Te6, 45 to 80 mole percent of GeTe 4 and 5 to 40 mole percent of AgX, wherein the total mole percentage of all components is 100 percent; X is Cl or Br or I; the transition temperature (Tg) of the glass is between 170 and 200 DEG C; the thermal stability temperature (delta T) of the glass is between 100 and 120 DEG C; the thickness of the glass is no more than 1.4 millimeters; and a cut-off edge through which an infrared band can pass is up to 25 mu m. The glass has an appropriate transition temperature, and high thermal stability, reduces the base frequency molecular vibration of the glass due to the adoption of a heaviest element in a sulfur group, namely, tellurium and reduces the phonon energy of the glass. Simultaneously, the thickness of the glass is controlled to be no more than 1.4 millimeters so that the influence of multi-phonon absorption is reduced, the cut-off edge, through which the infrared band can pass, of the tellurium-based sulfur series infrared glass is enhanced and can reach 25 mu m, substances with long far infrared wavelengths can be absorbed and spectrum detection space is expanded. The glass preparation method has the advantages of simple process, high glass forming capability, no corrosion, easy operation, short processing period and high efficiency.

Description

technical field [0001] The invention relates to an infrared glass material, in particular to a tellurium-based chalcogenide infrared glass and a preparation method thereof. Background technique [0002] Infrared glass materials, whose spectral range is 6-25μm, are used in infrared spectrum technology and biosensing technology. Infrared spectrum technology is one of the main techniques for molecular and structural identification of organic and inorganic compounds, such as H 2 O at 6μm, O 3 at 9 μm and CO 2 The spectral absorption peak is caused at 16 μm, so the zero position interferometer of the European Space Agency's Darwin project uses infrared glass materials (6-18 μm spectral region). Biosensing technology is to identify compounds and detect biological tissues by comparing with standard spectra of infrared spectroscopy. Infrared glass materials can be divided into mid-infrared glass (6-13 μm) and far-infrared glass (14-25 μm) according to the spectral region. NASA e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/32C03C4/10
CPCC03C3/323
Inventor 王国祥聂秋华王训四戴世勋徐铁峰沈祥
Owner 宁波阳光和谱光电科技有限公司
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