Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of hollow inorganic oxide microspheres with high pressure resistance and low density

A technology of inorganic oxides and hollow alumina, applied in the direction of coating, etc., can solve the problems of low compressive strength, achieve low production costs, simple preparation methods, and good fluidity

Active Publication Date: 2012-07-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing low-density hollow oxide microspheres with a compressive strength of 30 to 150 MPa, and the anti-corrosion Low-density hollow oxide microspheres with a compressive strength of 30-150Mpa and applications of the microspheres

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of hollow inorganic oxide microspheres with high pressure resistance and low density

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) After first preparing 95kg of silicon dioxide and 5kg of perchlorethylene epoxy adhesive, beat it into a slurry with 500kg of ethanol, and put the slurry into a spray granulator through a circulating pump to obtain silicon dioxide by spraying and granulating Hollow microsphere precursor, the particle size of the silica hollow microsphere precursor is 10-75 μm, the surface of the microsphere has micropores, and the compressive strength is low;

[0015] (2) The silica hollow microsphere precursor prepared in step (1) is sintered in a high-temperature sintering furnace at a high temperature of 3000 ° C for an instant, and the micropores on the surface of the silica hollow microsphere precursor are rapidly closed to obtain Silicon hollow microspheres, their performance indicators are shown in Table 1.

Embodiment 2

[0017] (1) After uniformly mixing 80kg of zirconia and 5kg of silicic acid in water, 10kg of water is used to make a slurry, and the slurry is injected into a spray granulator through a circulation pump to obtain zirconia hollow microspheres. The precursor, the particle size of the zirconia hollow microsphere precursor is 10-95 μm, the surface of the microsphere has micropores, and the compressive strength is low;

[0018] (2) The zirconia hollow microsphere precursor prepared in step (1) is sintered in a high-temperature sintering furnace at a high temperature of 10,000 ° C for an instant, and the micropores on the surface of the zirconia hollow microsphere precursor are quickly closed to obtain The properties of zirconium hollow microspheres are shown in Table 1.

Embodiment 3

[0020] (1) After mixing 75kg of alumina and 5kg of polyurethane epoxy resin, 10kg of isopropanol is used to make a slurry, and the slurry is injected into a spray granulator through a circulating pump to obtain aluminum oxide hollow microspheres. The spherical precursor, the basic shape of the aluminum oxide hollow microsphere precursor is a hollow sphere of 30-100 μm, the surface of the microsphere has micropores, and the compressive strength is low;

[0021] (2) The alumina hollow microsphere precursor prepared in step (1) is sintered in a high-temperature sintering furnace at a high temperature of 8500 ° C for a short time, and the micropores on the surface of the alumina hollow microsphere precursor are rapidly closed to obtain aluminum oxide Hollow microspheres, their performance indicators are shown in Table 1.

[0022] Table 1 The performance indicators of the high-pressure low-density hollow inorganic oxide microspheres prepared in Examples 1-3

[0023]

[0024] Re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
compressive strengthaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of hollow inorganic oxide microspheres with high pressure resistance and low density, and the obtained microspheres are mainly applied to the fields of high-temperature heat insulation coatings, paint, modified rubber, food packaging materials and the like. The preparation method disclosed by the invention comprises the following steps: firstly uniformly mixing an inorganic oxide raw material, a solvent and a binding additive at a weight ratio of (75-95):(10-500):(5-25), and then pumping into a spray drying machine for spray granulation to get hollow inorganic oxide spherical precursors of the hollow inorganic oxide microspheres; and then performing high-temperature instantaneous sintering on the obtained hollow inorganic oxide spherical precursors to get the hollow inorganic oxide microspheres with compressive strength of 30-150Mpa and low density. The microspheres obtained by the preparation method disclosed by the invention have the advantages of high sphericity, good mobility and narrow distribution range of particle size; and furthermore, the preparation method is simple and the production cost is low.

Description

technical field [0001] The invention relates to a method for preparing hollow inorganic oxide microspheres with high compression resistance and low density. The obtained microspheres are mainly used in the fields of high-temperature heat-insulating coatings, paints, modified rubbers, and food packaging materials. Background technique [0002] Inorganic oxide hollow microspheres are hollow and tiny spherical materials containing gas. It is a unique and stable hollow particle with low density, low thermal conductivity, good dispersion, fluidity, and thermal stability. In addition, inorganic oxide hollow microspheres also have excellent properties such as insulation, self-lubrication, sound insulation, heat insulation, non-absorbent, corrosion resistance, radiation protection, non-toxic, and tasteless. Due to the above-mentioned unique hollow structure, physical and mechanical properties and stable chemical properties, inorganic oxide hollow microspheres are widely used as non-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/10C04B35/48C04B35/622C09D7/12C08L21/00C08K7/26C08K7/24
Inventor 范俊梅袁方利李晋林胡鹏
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI