Nano silver shell/single dispersion SiO2 composite particle materia land its producing method and use

A technology of nano-silica and composite particles, which is used in the agglomeration of nano-powders formed by composite particles, composite particle materials of nano-metal shell/silica core and their preparation fields, which can solve the problem of uncontrollable coating thickness, etc. problems, to achieve the effect of low cost, high product purity and low emissivity

Inactive Publication Date: 2006-01-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

This technology uses an organosilicon chemistry called Chemical Thermolysis (CT) or Solid State Reaction Pathway to create uniformly distributed small crystal structures made from pure metal oxide onto single sided surfaces at room temperature. These tiny crystals have unique electrical conductance patterns due to their size and shape. They also emit strong visible lights when excited by laser radiation. By combining these special features together they make it possible to produce various products such as electronic devices like transistors, batteries, displays, and other components used in vehicles today's marketplace.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding ways to prepare nanoporous metallic clay (NPC)-based composites suitable for various applications like sensors, displays, and other electronic devices. Current techniques involve immersing preprocessed silicas into solutions containing different types of solvents, which leads to aggregations between them. Additionally, current processes require expensive apparatuses and are time-consuming.

Method used

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  • Nano silver shell/single dispersion SiO2 composite particle materia land its producing method and use
  • Nano silver shell/single dispersion SiO2 composite particle materia land its producing method and use
  • Nano silver shell/single dispersion SiO2 composite particle materia land its producing method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) 3.5 grams of 250 nanometer monodispersed silicon dioxide particles are mixed with 4.0 grams of silver oxide and placed in a planetary grinder, and ground for several hours;

[0028] (2) The ground mixture is heated in an electric furnace at a temperature of 340°C, and after being kept for one day, it is cooled to room temperature;

[0029] (3) Place the product in an autoclave, add high-viscosity, high-boiling point inert liquid solvent paraffin oil and an electromagnetic stirrer, the weight percent concentration of the suspension is 0.1%, seal; heat and stir at 130 ° C, remain for hours or days;

[0030] (4) Centrifugal separation, wash and separate repeatedly with ethanol solvent, after drying, obtain the wavelength-regulating particles of the yellow surface plasmon material of the silver nanocrystal composite assembly on the spherical nano-silicon dioxide particle surface, and the layer thickness is about 14 to 19 nm.

Embodiment 2

[0032] (1) 5.25 grams of 250 nanometer monodispersed silicon dioxide particles are mixed with 4.0 grams of silver oxide and placed in a planetary grinder, and ground for several hours;

[0033] (2) The ground mixture is heated in an electric furnace at a temperature of 360°C, and after being kept for one day, it is cooled to room temperature;

[0034] (3) Place the product in an autoclave, add high-viscosity, high-boiling point inert liquid solvent paraffin oil and an electromagnetic stirrer, the weight percent concentration of the suspension is 0.01%, seal; heat and stir at 120 ° C, remain for hours or days;

[0035] (4) Centrifugal separation, wash and separate repeatedly with ethanol solvent, after drying, obtain the wavelength adjustment particles of the light yellow surface plasmon material assembled on the surface of spherical nano silicon dioxide particles by silver nanocrystal composite, with a layer thickness of about 60 to 85 nm.

Embodiment 3

[0037] (1) 3.5 grams of 400 nanometer silicon dioxide particles are mixed with 4.0 grams of silver oxide and placed in a planetary grinder, and ground for several hours;

[0038] (2) The ground mixture is heated in an electric furnace at a temperature of 380°C, kept warm for several hours to several days, and then cooled to room temperature;

[0039] (3) The resultant is placed in an autoclave, and a high-viscosity, high-boiling point inert liquid solvent glycerin and an electromagnetic stirrer are added, and the concentration by weight of the suspension is 3%, sealed; heated and stirred at 120° C., kept hours or days;

[0040] (4) Centrifugal separation, repeated washing and separation with ethanol solvent, after drying, obtain the wavelength adjustment particles of the light yellow surface plasmon material of the silver nanocrystal composite assembly on the surface of the spherical nano-silicon dioxide particles, and the thickness of the layer is about 12 to 16 nm.

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Abstract

The present invention belongs to the field of functional composite material, is especially one kind of composite granular nanometer metal shell/silica core material and its preparation process and use, and relates to method of solving the coagulation problem of nanometer powder of the nanometer metal shell/silica core grains. Nanometer silver shell produced in thermal decomposition reaction is compounded and assembled to the surface of nanometer silica grain to form the composite shell/core material. Nanometer silver coated silica has combined characteristics of both silver and silica, and has light weight, optical non-linearity and low radiance. The composite granular nanometer metal shell/silica core material may be used as the active component in automobile catalyst, and in non-linear optical material, surface plasma vibrator material, etc.

Description

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Claims

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Application Information

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Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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