CN104944774A - Glass bead with refractive index being greater than or equal to 1.93 and preparation method thereof - Google Patents

Abstract

The invention discloses a glass bead with refractive index being greater than or equal to 1.93 and a preparation method thereof. The glass bead is prepared from the following raw materials in parts by weight: 52-64 parts of quartz sand, 24-36 parts of titanium dioxide, 33-47 parts of datolite, 16-28 parts of cryolite, 12-24 parts of zr-containing silica residue, 10-15 parts of precipitated barium sulphate, 10-15 parts of chromic nitrate, 8-14 parts of magnesium trisilicate, 5-10 parts of calcium fluoride, 4-8 parts of magnesium carbonate, 6-12 parts of sodium carbonate, 7-14 parts of zinc dihydrogen phosphate and 4-8 parts of an additive. According to the invention, due to the synergistic effect of the raw materials including quartz sand, datolite, zr-containing silica residue, chromic nitrate, magnesium trisilicate, zinc dihydrogen phosphate and the like, the prepared glass bead is enabled to have the refractive index being greater than or equal to 1.93 and the advantages of high stability, finished product rate and strength, light weight and excellent chemical stability, and realize large-scale batch production.

Description

Glass microballon of a kind of specific refractory power >=1.93 and preparation method thereof

Technical field

The present invention relates to glass microballon of a kind of specific refractory power >=1.93 and preparation method thereof, belong to glass microballon and manufacture field.

Background technology

A kind of of many uses, a kind of type material that performance is special that glass microballon is that development in recent years is got up, be the small hollow glass spheroid of a kind of size, belong to ceramic.Glass microballon is the main raw material manufacturing light reflecting material, can be widely used in the field light reflecting materials such as highway, railway, airport, harbour, sea transport, mine, tunnel, fire-fighting, urban construction.Along with China is to the increasing of infrastructure construction dynamics of investment, the demand of glass microballon is increasing, especially high refractive index (N >=1.9) glass microballon.Current China only has minority producer to grasp the production technology of high refractive index glass micro pearl, and its product technology parameter is very unstable, and yield rate is low, is difficult to large-scale mass production.

Summary of the invention

Of the present inventionly be for the deficiencies in the prior art, the glass microballon and preparation method thereof of a kind of high stability, high rate of finished products, specific refractory power >=1.93 is provided.

For achieving the above object, the technical solution used in the present invention is as follows:

A glass microballon for specific refractory power >=1.93, is made up of the raw material of following weight part: quartz sand 52-64, titanium dioxide 24-36, howlite 33-47, sodium aluminum fluoride 16-28, zirconium white residue 12-24, process white 10-15, chromium nitrate 10-15, Magnesium Trisilicate 8-14, Calcium Fluoride (Fluorspan) 5-10, magnesiumcarbonate 4-8, soda ash 6-12, primary zinc phosphate 7-14, additive 4-8;

Described additive is mixed by the raw material of following weight part: dysprosium oxide 2-3, nanometer palygorskite 4-6, ceric hydroxide 3-4, antimonous acid anhydride 5-8, barium molybdate 6-12, sodium wolframate 4-7, Bismuth Subcarbonate 8-14, titanium sponge 3-5, antimony sulfide 2-4, zinc selenide 2-3.

A preparation method for the glass microballon of specific refractory power >=1.93, comprises the following steps:

(1) quartz sand, howlite and zirconium white residue are mixed, are positioned in microwave baking furnace, first under the Ar atmosphere of 2-3MPa, when microwave heating is to 470-510 DEG C, insulation 10-15 min, air cooling to normal temperature, then at the N of 3-4MPa ₂under atmosphere, when microwave heating is to 460-490 DEG C, insulation 14-18min, take out, air cooling, to normal temperature, is pulverized, cross 80-120 mesh sieve, add the suspension that appropriate water stirs that to make concentration be concentration and be 50-60%, 2000-3000r/min speed lapping 10-15min, is delivered to after grinding in spray-drying tower and is spray dried to powder at 120-160 DEG C of temperature;

(2) powder that above-mentioned spraying dry obtains is mixed with Magnesium Trisilicate, process white, magnesiumcarbonate, chromium nitrate, be added in electrolytic furnace, be heated to material and all melt, then add remaining raw material, stir 4-6min, then leave standstill 10-15min, blanking;

(3) by under the fused solution that goes out put into clear water and carry out shrend, by de-for moisture content dry after, put into dryer and dry, then by dry the glass particle material that obtains by fragmentation, screening, balling-up, again sieve, wash, dry after, formation glass microballon product.

Beneficial effect of the present invention:

The present invention adopts the raw material such as quartz sand and howlite, zirconium white residue, chromium nitrate, Magnesium Trisilicate, primary zinc phosphate mutually to act synergistically, make glass microballon not only specific refractory power >=1.93 obtained, and there is high stability, high rate of finished products, light weight, high strength, the advantages such as good chemical stability, can realize large-scale mass production.

Embodiment

A glass microballon for specific refractory power >=1.93, is made up of the raw material of following weight (kg): quartz sand 58, titanium dioxide 32, howlite 44, sodium aluminum fluoride 22, zirconium white residue 18, process white 12, chromium nitrate 13, Magnesium Trisilicate 12, Calcium Fluoride (Fluorspan) 8, magnesiumcarbonate 6, soda ash 8, primary zinc phosphate 12, additive 6;

Described additive is mixed by the raw material of following weight (kg): dysprosium oxide 2, nanometer palygorskite 4, ceric hydroxide 3, antimonous acid anhydride 5, barium molybdate 6, sodium wolframate 4, Bismuth Subcarbonate 8, titanium sponge 3, antimony sulfide 2, zinc selenide 2.

A preparation method for the glass microballon of specific refractory power >=1.93, comprises the following steps:

(1) quartz sand, howlite and zirconium white residue are mixed, are positioned in microwave baking furnace, first under the Ar atmosphere of 2-3MPa, when microwave heating is to 470-510 DEG C, insulation 10-15 min, air cooling to normal temperature, then at the N of 3-4MPa ₂under atmosphere, when microwave heating is to 460-490 DEG C, insulation 14-18min, take out, air cooling, to normal temperature, is pulverized, cross 80-120 mesh sieve, add the suspension that appropriate water stirs that to make concentration be concentration and be 50-60%, 2000-3000r/min speed lapping 10-15min, is delivered to after grinding in spray-drying tower and is spray dried to powder at 120-160 DEG C of temperature;

(2) powder that above-mentioned spraying dry obtains is mixed with Magnesium Trisilicate, process white, magnesiumcarbonate, chromium nitrate, be added in electrolytic furnace, be heated to material and all melt, then add remaining raw material, stir 4-6min, then leave standstill 10-15min, blanking;

(3) by under the fused solution that goes out put into clear water and carry out shrend, by de-for moisture content dry after, put into dryer and dry, then by dry the glass particle material that obtains by fragmentation, screening, balling-up, again sieve, wash, dry after, formation glass microballon product.

The Refractive Index of Glass Microspheres adopting above-described embodiment to prepare is 1.95, roundness 98%.

Claims (2)

1. the glass microballon of specific refractory power >=1.93, it is characterized in that, be made up of the raw material of following weight part: quartz sand 52-64, titanium dioxide 24-36, howlite 33-47, sodium aluminum fluoride 16-28, zirconium white residue 12-24, process white 10-15, chromium nitrate 10-15, Magnesium Trisilicate 8-14, Calcium Fluoride (Fluorspan) 5-10, magnesiumcarbonate 4-8, soda ash 6-12, primary zinc phosphate 7-14, additive 4-8;

Described additive is mixed by the raw material of following weight part: dysprosium oxide 2-3, nanometer palygorskite 4-6, ceric hydroxide 3-4, antimonous acid anhydride 5-8, barium molybdate 6-12, sodium wolframate 4-7, Bismuth Subcarbonate 8-14, titanium sponge 3-5, antimony sulfide 2-4, zinc selenide 2-3.

2. a preparation method for the glass microballon of specific refractory power >=1.93 as claimed in claim 1, is characterized in that comprising the following steps:

(1) quartz sand, howlite and zirconium white residue are mixed, are positioned in microwave baking furnace, first under the Ar atmosphere of 2-3MPa, when microwave heating is to 470-510 DEG C, insulation 10-15 min, air cooling to normal temperature, then at the N of 3-4MPa ₂under atmosphere, when microwave heating is to 460-490 DEG C, insulation 14-18min, take out, air cooling, to normal temperature, is pulverized, cross 80-120 mesh sieve, add the suspension that appropriate water stirs that to make concentration be concentration and be 50-60%, 2000-3000r/min speed lapping 10-15min, is delivered to after grinding in spray-drying tower and is spray dried to powder at 120-160 DEG C of temperature;

(2) powder that above-mentioned spraying dry obtains is mixed with Magnesium Trisilicate, process white, magnesiumcarbonate, chromium nitrate, be added in electrolytic furnace, be heated to material and all melt, then add remaining raw material, stir 4-6min, then leave standstill 10-15min, blanking;

(3) by under the fused solution that goes out put into clear water and carry out shrend, by de-for moisture content dry after, put into dryer and dry, then by dry the glass particle material that obtains by fragmentation, screening, balling-up, again sieve, wash, dry after, formation glass microballon product.