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Method of making inorganic, metal oxide spheres using microstructured molds

A technology of inorganic metals and oxides, applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problems of high cost and energy consumption, reduce waste, increase processing speed, improve overall utilization rate and output rate effect

Inactive Publication Date: 2009-08-12
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Beads formed by liquid glass atomization often have a broad particle size distribution, requiring sorting (e.g. screening) of the product, resulting in prohibitive cost and energy consumption

Method used

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  • Method of making inorganic, metal oxide spheres using microstructured molds
  • Method of making inorganic, metal oxide spheres using microstructured molds
  • Method of making inorganic, metal oxide spheres using microstructured molds

Examples

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example 1

[0106] A 52% solids slurry was prepared by combining 35.00 g of titanium dioxide, 11.00 g of silicon dioxide, 59.20 g of barium carbonate, 10.71 g of calcium carbonate, and 3.81 g of sodium borate while mixing. Prepare powder. 54g of deionized water was added to 96.07g of the powder to form a 64% solids slurry. The slurry was placed in a ceramic grinding jar filled with zirconia media and ground for 4 days. An additional 10 g of deionized water was added on the third day of milling and 25 g of deionized water was added on the fourth day for a total of 89 g of water to obtain a slurry with 52% solids. Then 1.92 g of surfactant and 8.96 g of D sodium silicate liquid binder (PQ Corporation, Berwyn, PA) were added to the slurry.

[0107] The resulting composition was then manually spread with a squeegee on a surface with a 2.4 x 10 7 cc tapered micro-mold on the tool to fill the mold. The filled molds were placed in an oven at 204.8°F (96°C) and dried for 3 hours. The molded ...

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Abstract

A process for making inorganic, metal oxide spheres that includes exposing solidified, molded microparticles that include a glass precursor composition to a temperature sufficient to transform the molded microparticles into molten glass and cooling the molten glass to form inorganic, metal oxide spheres.

Description

Background technique [0001] The present invention relates to the formation of inorganic metal oxide spheres from molded particles. [0002] Various methods are currently used to prepare glass beads, also known as glass microspheres. These methods often require repeated crushing and classification steps of the particulate material in an effort to obtain glass beads having a relatively narrow particle size distribution. Some methods of making glass beads include producing a granular feed material, which is then converted into glass by melting. The granular feed material can be formed by comminuting glass particles (or components capable of forming glass when heated at a sufficiently high temperature) and volatilizing the comminuted particles with a solvent such as water, for example, by grinding. Mix liquids thoroughly. Binders such as dextrin or starch are sometimes added to hold the ground granular raw material together. The ground material is then dried, for example, in b...

Claims

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Application Information

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IPC IPC(8): C03B19/10
CPCG02B5/128C03B19/108C03B19/10C03B19/102C03C12/02Y10T428/24421C08K3/22C08K3/26C08K3/34C08K3/36C08K3/38C08K2003/2241C08K2003/265C08K2003/387
Inventor 戴维·C·克拉姆利奇约翰·L·范登堡马修·H·弗雷斯科特·R·卡勒凯瑟琳·M·舍克尔-卡尔森
Owner 3M INNOVATIVE PROPERTIES CO
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