Preparation method of high-refractive-index glass beads

A technology of glass microspheres and high refractive index, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as large temperature gradient, long flame length, and affecting product stability, so as to improve productivity and improve finished products rate effect

Active Publication Date: 2020-02-21
绵阳光耀新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires a longer flame length, which will increase the height of the bead forming furnace, and the temperature gradient of the flame in the length direction is too large, which affects product stability.

Method used

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  • Preparation method of high-refractive-index glass beads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Proportioning of raw materials: Weigh 30% of titanium dioxide, 30% of silicon dioxide, 20% of barium carbonate as barium oxide, 8% of zirconium carbonate as zirconia, 4% of zinc oxide by weight percentage, and Boron 4% boric acid, and calcium fluoride 4%; The raw materials are mixed uniformly in a mixer;

[0029] (2) Preparation of glass microsphere precursor: melt the raw materials mixed in step (1) at 1200°C, so that the raw materials are fully mixed in the molten state, and then water quench the molten mixture to obtain water Quenching the particles, cleaning and drying the water-quenching particles, ball milling, filtering and sieving to obtain a glass bead precursor with a particle size of 50 μm;

[0030] (3) Preparation of glass beads: the glass bead precursor is divided into two paths, and the glass bead precursor of each path is mixed with combustion gas and combustion-supporting gas under the drive of compressed gas, and then sprayed into the combustion fur...

Embodiment 2

[0032]Same as Example 1, but the proportioning of raw materials is: weigh 35% of titanium dioxide, 20% of silicon dioxide, 25% barium carbonate as barium oxide, 10% zirconium carbonate and zinc oxide as zirconia according to weight percentage 2%, boric acid 5% as boron oxide, and calcium fluoride 3%.

Embodiment 3

[0034] It is the same as in Example 1, but the particle size of the glass microbead precursor is 60 μm, the injection speed of the spray gun is 70 m / s, and the injection paths of the two spray guns form an angle of 85° at the intersection point.

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Abstract

The invention relates to a preparation method of high-refractive-index glass beads. The preparation method comprises the following steps: with titanium dioxide, silicon dioxide, a barium salt, a zircon salt, zinc oxide, boric acid and calcium fluoride as raw materials, carrying out melting, mixing and ball-milling to obtain glass bead precursors with particle sizes in a range of 10-100 microns; and dividing the glass bead precursors into at least two paths, and allowing each path of the glass bead precursors to be driven by compressed gas so as to realize mixing with combustion gas and combustion-supporting gas and spraying into a combustion furnace through a spray gun, wherein the heating temperature of the combustion furnace is 1000 to 1500 DEG C, the spraying speed of the spray gun is 10-100 m / s, the ejection paths of all the spray guns have a common intersection point, and an included angle of 60-105 degrees is formed at the intersection point of the ejection paths of the spray guns. According to the invention, the glass bead precursors are ejected at an angle by at least two spray guns, so molten liquid glass beads collide with each other to form larger beads; and thus, the stability of the prepared large-particle-size high-refraction glass beads is guaranteed.

Description

technical field [0001] The invention relates to a method for preparing high-refractive-index glass beads, which is especially suitable for preparing large-diameter high-refractive-index glass beads. Background technique [0002] High-refractive index glass beads are important raw materials for the manufacture of reflective materials. They have the advantages of transparency and high mechanical strength. This kind of glass beads can be used to coat road coatings to achieve reflective marking, especially in rainy night environments. Refractive index glass beads can still have a good reflective effect. Generally, glass beads with a refractive index above 1.9 are called high-refractive index glass beads, which pass TiO 2 , BaO, PbO, ZrO, La 2 o 3 and other materials to increase the refractive index of glass beads, but because the above-mentioned materials have high molecular weight and are easy to crystallize, it is difficult to prepare glass beads with large particle size. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/02C03C6/06C03B19/10
CPCC03C12/02C03C1/00C03B19/1005Y02P40/57
Inventor 陈保军柯常友漆敬东张云霞杨贤富
Owner 绵阳光耀新材料有限责任公司
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