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Synchronic preparation method of lead telluride thin film and nano powder

A nano-powder and lead telluride technology, applied in the field of materials, can solve the problems of high cost, complex instruments, harsh conditions, etc., and achieve the effects of environmental protection, easy availability of raw materials, and cheap raw materials

Inactive Publication Date: 2009-12-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most PbTe nanoparticles are synthesized by hydrothermal method or solvothermal method, electrochemical method, emulsion method and other methods. Due to the introduction of a large amount of organic matter, it brings difficulties to post-processing and environmental protection
In short, these methods have relatively harsh conditions, or low output and high cost, which are not conducive to industrial production

Method used

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  • Synchronic preparation method of lead telluride thin film and nano powder
  • Synchronic preparation method of lead telluride thin film and nano powder
  • Synchronic preparation method of lead telluride thin film and nano powder

Examples

Experimental program
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Effect test

example 1

[0020] Simultaneous Synthesis of Lead Telluride Thin Films and Nanoparticles at Room Temperature

[0021] 1 ingredient

[0022] (1) Add 100ml of deionized water into the beaker, put it into the stirring magnet and stir.

[0023] (2) Weigh 0.379g of lead acetate trihydrate and 0.159g of tellurium dioxide into a beaker.

[0024] (3) Weigh 1.4g KOH into the beaker, and keep stirring until the solution becomes transparent and clear.

[0025] (4) Weigh 0.294g of sodium citrate into the beaker.

[0026] (5) Weigh 0.5g KBH 4 Slowly add to the beaker, stirring continuously during the addition.

[0027] (6) All KBH will be added 4 After dissolving, take out the stirring magnet and add deionized water to 200ml.

[0028] (7) Put in the glass substrate and tilt it to form an angle of 30° with the bottom of the beaker.

[0029] 2 constant temperature reaction

[0030] Seal the mouth of the beaker with plastic wrap to prevent dust from entering, and let stand at room temperature for...

example 2

[0039] Synchronous Synthesis of PbTe Thin Films and Nanoparticles in 50℃ Water Bath

[0040] 1 ingredient

[0041] (1) Add 100ml of deionized water into the beaker, put it into the stirring magnet and stir.

[0042] (2) Weigh 0.379g of lead acetate trihydrate and 0.159g of tellurium dioxide into a beaker.

[0043] (3) Weigh 1.4g KOH into the beaker, and keep stirring until the solution becomes transparent and clear.

[0044] (4) Weigh 0.292g of ethylenediaminetetraacetic acid into the beaker.

[0045] (5) Weigh 0.5g KBH 4 Slowly add to the beaker, stirring continuously during the addition.

[0046] (6) All KBH will be added 4 After dissolving, take out the stirring magnet and add deionized water to 200ml.

[0047] (7) Put in the glass substrate and tilt it to form an angle of 30° with the bottom of the beaker.

[0048] 2 constant temperature reaction

[0049] Seal the mouth of the beaker with plastic wrap to prevent dust from entering, and put it in a constant temperat...

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Abstract

The invention belongs to the lead telluride (PbTe) thin film and nano powder preparation method field. In a low temperature aqueous solution synchronic synthesis method of PbTe thin film and nano powder, inorganic salt containing lead and tellurium dioxide or sodium tellurite are taken as raw materials, potassium borohydride or sodium borohydride is taken as reducing agent, and PbTe thin film and nano powder are simultaneously synthesized in alkaline aqueous solution at room temperature to 50 DEG C. The invention initially synthesizes PbTe thin film and nano powder at normal atmosphere and below 100 DEG C, the prepared thin film is flat, compact and uniform; and powder product is small in grain diameter uniform in grain fineness distribution, and grain diameter size can be controlled by controlling reaction temperature. The raw materials used in the whole technology are available, the technology is simple, scale production is easy to realize, and organic solvent is not used in the reaction process, thus being beneficial to environmental protection. The synthesized PbTe thin film and nano powder can be widely applied to thermoelectric device, solar battery, fluorescence device, infrared optical element, infrared thin film device, semiconductor detector and the like and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a method for synchronously preparing lead telluride thin films and nanopowders. Background technique [0002] Lead telluride (PbTe) has excellent thermoelectric properties, photoelectric properties and infrared optical properties, and is widely used in thermoelectric devices, infrared optical components, infrared thin film devices and semiconductor detectors. In terms of thin films, PbTe material is the only ionic bond compound among IV-VI narrow-bandgap semiconductors. Its refractive index in the infrared spectrum is as high as 5.5, which is the highest among the infrared coating materials that can be actually used at present, and can effectively reduce the infrared The number of layers of optical thin film devices reduces stress and increases transmittance. At the same time, PbTe has good stress coordination with ZnS, ZnSe and other low-refractive index material films, which can make th...

Claims

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Application Information

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IPC IPC(8): C01B19/04C30B29/46
Inventor 蔡克峰汪元元姚熹
Owner TONGJI UNIV
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