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High-strength hollow glass beads and preparation method thereof

A hollow glass microsphere, high-strength technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of insufficient compressive strength of microspheres, high alkali metal content, and low chemical composition, etc., to achieve finished products The effect of high efficiency, lower preparation temperature, and prevention of volatilization of components

Active Publication Date: 2014-08-13
白银金奇化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of this application is to solve the problem of insufficient compressive strength of the microspheres due to the low chemical components, many impurities, and high alkali metal content of the hollow glass microspheres prepared by the previous sol-gel method. Based on the respective advantages of the glue method and the precipitation method, at the same time, the silica nanopowder is applied to the hollow glass microsphere to enhance the compactness, and a high-strength hollow glass microsphere and its preparation method are provided.

Method used

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  • High-strength hollow glass beads and preparation method thereof
  • High-strength hollow glass beads and preparation method thereof
  • High-strength hollow glass beads and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Step one is as follows:

[0092] Step 101: The raw materials used in the experiment are ethyl orthosilicate, sodium sulfate, absolute ethanol, and isopropanol, which are analytically pure; aluminum isopropoxide, barium ethoxide, and lithium ethoxide are self-synthesized by heating under reflux and vacuum distillation.

[0093] i. According to the mass percentage converted to oxides, 18% BaO, 16% Al 2 o 3 , 50% SiO 2 , 2%SO 3 , 14%Li 2 O Accurately weigh raw materials;

[0094] ii. Dissolve ethyl orthosilicate, barium ethylate and lithium ethylate with absolute ethanol, and dissolve aluminum isopropoxide and sodium sulfate mixture with isopropanol;

[0095] iii. Adopt step-by-step hydrolysis method, add a small amount of distilled water to the ethyl orthosilicate ethanol solution to partially hydrolyze in advance, add barium ethoxide ethanol solution, add lithium ethoxide ethanol solution, dissolve and then add the mixture of aluminum isopropoxide and sodium sulfate...

Embodiment 2

[0136] Step one is as follows:

[0137] Step 101: The raw materials methyl orthosilicate, sodium sulfate, and anhydrous methanol used in the experiment are analytically pure; trimethyl aluminate, barium methoxide, and lithium methoxide are self-synthesized by heating under reflux and vacuum distillation.

[0138] i. According to the mass percentage converted to oxides, 18% BaO, 16% Al 2 o 3 , 50% SiO 2 , 2%SO 3 , 14%Li 2 O Accurately weigh raw materials;

[0139] ii. Dissolve methyl orthosilicate, barium methylate, lithium methylate, trimethyl aluminate and sodium sulfate mixture with anhydrous methanol;

[0140] iii. Step by step hydrolysis method is adopted, methyl orthosilicate methanol solution is partially hydrolyzed in advance with a small amount of distilled water, barium methoxide methanol solution is added, lithium methoxide methanol solution is added, and methanol solution of trimethyl aluminate and sodium sulfate mixture is added after dissolution;

[0141] iv...

Embodiment 3

[0158] Step one is as follows:

[0159] Step 101: The raw materials of propyl orthosilicate, sodium sulfate, anhydrous propanol and isopropanol used in the experiment are analytically pure; aluminum isopropoxide, barium ethoxide and lithium isopropoxide are self-synthesized by heating under reflux and vacuum distillation.

[0160] i. According to the mass percentage converted to oxides, 18% BaO, 16% Al 2 o 3 , 50% SiO 2 , 2%SO 3 , 14% Li 2 O Accurately weigh raw materials;

[0161] ii. Dissolve propyl orthosilicate with anhydrous propanol, dissolve lithium isopropoxide, aluminum isopropoxide and sodium sulfate mixture with anhydrous isopropanol, and dissolve barium ethylate with absolute ethanol;

[0162] iii. Adopt step-by-step hydrolysis method, add a small amount of distilled water to the propyl orthosilicate propanol solution to partially hydrolyze in advance, add barium ethoxide ethanol solution, add lithium isopropoxide isopropanol solution, and then add aluminum is...

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Abstract

The invention discloses high-strength hollow glass beads, comprising the chemical components: 71-76.5% of SiO2, 1.5-2% of Al2O3, 4.5-5% of B2O3, 2.5-3% of Li2O, 0.2-0.5% of SO3, 5.5-6% of Na2O, 2.3-3.5% of BaO, 4.5-6% of CaO4 and 2.5-3% of P2O5, wherein the density is 0.4-0.8g / cm<3>, the compressive strength is 30-130MPa, the particle size is smaller than or equal to 80mum, the floatage rate is greater than or equal to 90%, and the softening temperature is greater than or equal to 700 DEG C. The preparation method comprises the following steps: preparing BaO-Al2O3-SiO2-Li2O-SO3-CaO-P2O5-Na2O-B2O3 gel by adopting a sol-gel method for hydrolyzing a polyhydric alcohol salt; preparing silica nano powder by using an alkoxide hydrolysis-precipitation method; quickly dewatering and drying to synthesize spherical precursor powder after stirring, mixing and homogenizing in an atomization manner; carrying out vitrification sintering. The high-strength hollow glass beads are applicable to high-temperature and high-pressure fields with special requirements, such as underwater solid buoyancy materials and deep well cementing cement in oil drilling.

Description

technical field [0001] The application relates to a hollow glass microsphere and its preparation method, in particular to the preparation of BaO-Al by sol-gel method and precipitation method of hydrolysis of polyalcohol salt 2 o 3 -SiO 2 -Li 2 O-SO 3 -CaO-P 2 o 5 -Na 2 O-B 2 o 3 Gel and silica nano-powder are stirred and mixed homogeneously, and then atomized, rapidly dehydrated, vitrified and sintered to prepare a high-strength hollow glass microsphere. Background technique [0002] Hollow Glass Microsphere HGM (Hollow Glass Microsphere) is a light-weight material with a particle size of micron, white spherical hollow, and inert gas. It has many physical and chemical properties unmatched by other fillers, such as high melting point, high resistivity, good electrical insulation, low density, good fluidity, small shrinkage, strong stability, heat insulation, sound insulation, high temperature resistance, thermal conductivity and A series of characteristics such as s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03B19/10
Inventor 白祯彩
Owner 白银金奇化工科技有限公司
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