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TeO2-SiO2 composite colloidal sols and preparation thereof

A composite sol and sol technology, applied in the field of nonlinear optical composite materials and their preparation, can solve the problems of limited doping degree, turbidity and opacity, difficult to prepare materials, etc., and achieve the effects of simple technology, low cost, and wide application prospects.

Inactive Publication Date: 2008-08-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, traditional TeO 2 The preparation process of base glass mainly adopts melting process, which is difficult to prepare materials such as thin films, and TeO 2 The doping degree is limited, and it is difficult to meet the needs of miniaturization and miniaturization of various optoelectronic devices
Preparation of TeO 2 Precursors of base materials such as tellurium alkoxides are very easy to hydrolyze and produce precipitation, resulting in TeO 2 The base material is turbid and opaque and cannot express the characteristics of nonlinear optical materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The present invention TeO 2 -SiO 2 The preparation method of composite sol, comprises the steps:

[0016] Step 1, prepare SiO 2 Sol, prepare absolute ethanol and distilled water at a molar ratio of 1:1, add distilled water to absolute ethanol in a glove box with dry air, stir for 20 min, and add it dropwise to the anhydrous ethanol with stirring In tetraethyl orthosilicate with ethanol molar ratio of 1:1, stir the mixed solution for 50 minutes to prepare SiO 2 Sol;

[0017] Step 2, prepare TeO 2 Sol, add citric acid to isopropanol in a glove box with dry air, stir the solution, and gradually add the isopropanol solution with a concentration of 1.0mol / L isopropanol tellurium under stirring to make citric acid and isopropanol The molar ratio of tellurium alcohol is 0.1:1, the final concentration of tellurium isopropoxide in the solution reaches 0.5mol / L, and the mixed solution is stirred for 50 minutes to obtain TeO 2 Sol;

[0018] Step 3, prepare TeO 2 -SiO 2 Co...

Embodiment 2

[0020] The present invention TeO 2 -SiO 2 The preparation method of composite sol, comprises the steps:

[0021] Step 1, prepare SiO 2 Sol, prepare absolute ethanol and distilled water at a molar ratio of 1:10, add distilled water to absolute ethanol in a glove box with dry air, stir for 5 min, and add it dropwise to the molar amount of absolute ethanol with stirring In tetraethyl orthosilicate with a number ratio of 1:1, stir the mixed solution for 10 minutes to prepare SiO 2 Sol;

[0022] Step 2, prepare TeO 2 Sol, add citric acid to isopropanol in a glove box with dry air, stir the solution, and gradually add the isopropanol solution with a concentration of 1.0mol / L isopropanol tellurium under stirring to make citric acid and isopropanol The molar ratio of tellurium alcohol is 8.0:1, the concentration of tellurium isopropoxide in the solution reaches 0.1mol / L, and the mixed solution is stirred for 10 minutes to obtain TeO 2 Sol;

[0023] Step 3, prepare TeO 2 -SiO ...

Embodiment 3

[0025] The present invention TeO 2 -SiO 2 The preparation method of composite sol, comprises the steps:

[0026] Step 1, prepare SiO2 Sol, prepare absolute ethanol and distilled water at a molar ratio of 1:5, add distilled water to absolute ethanol in a glove box with dry air, stir for 15min, then add dropwise to absolute ethanol with stirring In tetraethyl orthosilicate with a molar ratio of 1:1, stir the mixed solution for 25 minutes to prepare SiO 2 Sol;

[0027] Step 2, prepare TeO 2 Sol, add citric acid to isopropanol in a glove box with dry air, stir the solution, and gradually add the isopropanol solution with a concentration of 1.0mol / L isopropanol tellurium under stirring to make citric acid and isopropanol The molar ratio of tellurium alcohol is 4.0:1, the concentration of tellurium isopropoxide in the solution reaches 0.4mol / L, and the mixed solution is stirred for 25 minutes to obtain TeO 2 Sol;

[0028] Step 3, prepare TeO 2 -SiO 2 Composite sol, stirring ...

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PUM

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Abstract

The invention discloses a TeO2-SiO2 composite sol and a preparation method thereof, the molar percentage of all the component of the sol is: TeO2 is 2 percent to 80 percent; SiO2 is 20 percent to 98 percent, and a sol-gel method is used for firstly preparing precursor sols of TeO2 and SiO2 respectively, and then the TeO2 sol and the SiO2 sol are mixed, and the stable and transparent TeO2-SiO2 composite sols with different molar ratios are prepared after being stirred and added with acid. The preparation method of the invention can obtain the TeO2-SiO2 composite sol which has wide TeO2 doping concentration range, wherein, the high doped TeO2 sol is very important for preparing TeO2 based high performance nonlinear optical materials, such as TeO2 based films, TeO2 based glasses, etc. The sol-gel method of the invention is simple in technology, mild in reaction condition, even in product components, high in purity and low in consumption.

Description

technical field [0001] The invention belongs to a nonlinear optical composite material and a preparation method thereof, specifically, a TeO 2 -SiO 2 Nonlinear Optical Composite of Composite Sol and Preparation of TeO by Sol-Gel Method 2 -SiO 2 Composite sol method. Background technique [0002] The rapid development of ultra-fast communication, information processing and optical computer fields, such as various optoelectronic devices required for receiving and disseminating information to achieve high-speed data transmission and computing processing of a large amount of information, requires a large number of nonlinear optical (NLO) materials. TeO 2 Base materials have been extensively studied due to their excellent nonlinear optical properties and potential applications. Numerous studies have shown that TeO 2 Crystal, TeO 2 Base glass, etc., all have high refractive index and transparency, as studies have shown that TeO 2 The nonlinear refractive index of the base ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B8/00C03B8/02
Inventor 辜敏鲜晓东
Owner CHONGQING UNIV
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