CN103030282A - Microcrystalline glass using potash feldspar as main material and preparation method thereof - Google Patents

Abstract

The invention discloses a microcrystalline glass using potash feldspar as a main material, which is prepared from the following raw materials in parts by weight: 56-61 parts of potash feldspar, 19-25 parts of albite, 10-14 parts of silica powder, 8-13 parts of silicon dioxide, 8-10 parts of calcium oxide, 8.5-10 parts of sodium carbonate, 6.5-8 parts of calcium fluoride, 6-8 parts of table salt, 6-7 parts of potassium oxide, 5-7 parts of zinc oxide, 4.5-6 parts of aluminum oxide, 1-2 parts of sodium oxide, 2.5-3 parts of magnesium oxide, 3.5-4 parts of wood coal, 2-3 parts of gypsum, 3.2-5 parts of boron oxide, 2-3 parts of talcum powder, 2-4 parts of borax, 1.5-2 parts of lithium oxide, 2.3-3 parts of modified plant ash, 0.13-0.2 part of nickel oxide, 0.6-0.7 part of titanium dioxide, 0.8-1.2 parts of antimony trioxide and 0.3-0.4 part of potash feldspar. The microcrystalline glass disclosed by the invention has the advantages of favorable planarity, high mechanical strength, high hardness, favorable heat resistance, favorable bending strength, favorable corrosion resistance and favorable wear resistance; and the product can be prepared into various tubes and plates, and can be widely used as architectural wear-resistant corrosion-resistant materials and architectural decoration materials.

Description

A kind of devitrified glass take potassium felspar sand as major ingredient and preparation method thereof

Technical field

The present invention relates generally to a kind of devitrified glass and preparation method thereof, relates in particular to a kind of devitrified glass take potassium felspar sand as major ingredient and preparation method thereof.

Background technology

Devitrified glass, claim again glass-ceramic, it is a kind of type material that comprehensive glass and ceramic technology grow up, it is the equally distributed material of microcrystal and glassy phase, its physicochemical property has been concentrated glass, triple advantages of pottery and lithotome, high such as physical strength, corrosion-resistant, heat-resisting, wear-resisting, antioxidant property is good, electrical property is good, the coefficient of expansion is adjustable, Heat stability is good etc., and be better than lithotome and pottery, can be used for building curtain wall and indoor high-grade the decoration, also can do structured material mechanically, electronics, insulating material on the electrician, the baseboard material of large-scale integrated circuit, the heat-resisting serial vessel of microwave oven, chemical industry and impregnating material and mine high-abrasive material etc. are the type materials with 21st century of development prospect.Thereby be widely used in the fields such as electronics, chemical industry, military affairs, space flight, nuclear industry and building.Because devitrified glass can use ore, industrial tailings, metallurgical slag, potassium felspar sand, coal gangue etc. as main production raw material, and produced in the process pollution-free, the no radioactivity pollute of product own, environmentfriendly products or green material so be otherwise known as, often there are a large amount of manufacturability pores in the top layer of the devitrified glass of traditional mode of production and internal layer thereof, and the performances such as folding strength and water tolerance are not strong, limited the Application Areas of devitrified glass.

Summary of the invention

The object of the invention is exactly in order to remedy the defective of prior art, and devitrified glass of the fine and close pore-free of a kind of any surface finish, water-fast, High anti bending strength and preparation method thereof is provided.

The present invention is achieved by the following technical solutions:

A kind of devitrified glass take potassium felspar sand as major ingredient, it is comprised of the raw material of following weight parts:

Potassium felspar sand 56-61, albite 19-25, ground silica 10-14, silicon-dioxide 8-13, calcium oxide 8-10, yellow soda ash 8.5-10, Calcium Fluoride (Fluorspan) 6.5-8, salt 6-8, potassium oxide 6-7, zinc oxide 5-7, aluminum oxide 4.5-6, sodium oxide 1-2, magnesium oxide 2.5-3, charcoal 3.5-4, gypsum 2-3, boron oxide 3.2-5, talcum powder 2-3, borax 2-4, Lithium Oxide 98min 1.5-2, modification plant ash 2.3-3, nickel oxide 0.13-0.2, titanium dioxide 0.6-0.7, antimonous oxide 0.8-1.2, potassium felspar sand 0.3-0.4;

The preparation method of described modification plant ash is: plant ash is used 10-15% salt acid soak 3-4 hour, and deionized water wash soaked 3-4 hour with the 10-12% sodium hydroxide solution again, and is extremely neutral with deionized water wash again, dries, and is ground into ultrafine powder.

A kind of preparation method of the devitrified glass take potassium felspar sand as major ingredient may further comprise the steps:

(1) feed composition except modification plant ash is mixed to join in the glass-melting furnace, under 1550-1620 ℃ high temperature melting 2-3 hour, be down to again 1450-1470 ℃ of lower clarification 1.8-2 hour, make glass metal;

(2) glass metal with the clarification of above-mentioned surface directly drops in the water, and cold quenching becomes the glass cullet body, adds in the ball mill, and it is the glass powder of 0.05-0.07mm that ball milling becomes fineness, oven dry;

(3) glass powder that obtains is mixed with the modification plant ash of above-mentioned weight part, add the modified glass body powder of compound weight 2-4%, mix, at the 62-65MPa forming under the pressure, obtain green compact;

The preparation method of described modified glass body powder is: be that the plant ash of 10-20, the flyash that weight part is 50-60, attapulgite, the weight part that weight part is 15-20 are the calcite of 30-32 with weight part, mix and add in the glass-melting furnace, be heated under 1550-1600 ℃ the high temperature, melting 2-3 hour, be down to again 1400-1450 ℃ of lower clarification 1.5-2 hour, make glass metal, obtain broken glass body in the cold water of then quenching, grind to form again 3-5 μ m modified glass body powder;

(4) green compact are put into high temperature box type resistance furnace, temperature schedule: at room temperature be warmed up to 300-350 ℃ with 6-8 ℃/min speed; Be warmed up to 750-800 ℃ with 3-4 ℃/min speed again, insulation 1-1.5h; And then be heated to 1250-1260 ℃ with 5-8 ℃/min speed, insulation 3-3.5h;

(5) annealing: the glass after the above-mentioned crystallization is carried out anneal with the annealing cooling rate of 3-5 ℃/min, when temperature is down in 580-600 ℃, kept constant temperature 30-40 minute, and then 7-8 ℃/min speed is warmed up to 820-850 ℃, and then with 5-7 ℃/min speed continuation cooling, when temperature is down in 250-330 ℃, naturally cool to again room temperature;

(6) discharging, size as requested cuts into plate, and grinding and polishing, deburring get final product.

Advantage of the present invention is:

The devitrified glass planeness that the present invention produces is good, physical strength is high, hardness is large, have good heat impedance, flexural strength, erosion resistance and wear resistance, product can be made into all kinds of tubing, sheet material, can be widely used in architectural abrasion-proof corrosion-proof corrosion material, building and ornament materials, use for laboratory heating appliances, high-temperature heat exchanger, for silica glass, window pyrometer, radome etc.

Embodiment

Embodiment 1

A kind of devitrified glass take potassium felspar sand as major ingredient, it is comprised of the raw material of following weight parts (kilogram):

Potassium felspar sand 61, albite 25, ground silica 10, silica 13, calcium oxide 10, yellow soda ash 10, Calcium Fluoride (Fluorspan) 6.5, salt 8, potassium oxide 7, zinc oxide 7, aluminum oxide 4.5, sodium oxide 2, magnesium oxide 2.5, charcoal 3.5, gypsum 2, boron oxide 3.2, talcum powder 3, borax 4, Lithium Oxide 98min 1.5, modification plant ash 2.3, nickel oxide 0.2, titanium dioxide-0.7, antimonous oxide 1.2, potassium felspar sand 0.4;

The preparation method of described modification plant ash is: with 15% salt acid soak 4 hours, deionized water wash soaked 4 hours with 12% sodium hydroxide solution again with plant ash, again with deionized water wash to neutral, oven dry is ground into ultrafine powder.

A kind of preparation method of the devitrified glass take potassium felspar sand as major ingredient may further comprise the steps:

(1) feed composition except modification plant ash is mixed to join in the glass-melting furnace, melting is 3 hours under 1620 ℃ high temperature, is down to 1470 ℃ of lower clarifications 1.8 hours again, makes glass metal;

(2) glass metal with the clarification of above-mentioned surface directly drops in the water, and cold quenching becomes the glass cullet body, adds in the ball mill, and it is the glass powder of 0.07mm that ball milling becomes fineness, oven dry;

(3) glass powder that obtains is mixed with the modification plant ash of above-mentioned weight part, add the modified glass body powder of compound weight 3%, mix, at the 65MPa forming under the pressure, obtain green compact;

The preparation method of described modified glass body powder is: be that 20 plant ash, weight part are that 60 flyash, weight part are that 20 attapulgite, weight part are 32 calcite with weight part, mix and add in the glass-melting furnace, be heated under 1600 ℃ the high temperature, melting 3 hours, be down to again 1450 ℃ of lower clarifications 1.5 hours, make glass metal, obtain broken glass body in the cold water of then quenching, grind to form again 3-5 μ m modified glass body powder;

(4) green compact are put into high temperature box type resistance furnace, temperature schedule: at room temperature be warmed up to 350 ℃ with 8 ℃/min speed; Be warmed up to 800 ℃ with 4 ℃/min speed again, insulation 1.5h; And then be heated to 1260 ℃ with 8 ℃/min speed, insulation 3.5h;

(5) annealing: the glass after the above-mentioned crystallization is carried out anneal with the annealing cooling rate of 5 ℃/min, when temperature is down in 600 ℃, kept constant temperature 40 minutes, and then 8 ℃/min speed is warmed up to 850 ℃, and then with 7 ℃/min speed continuation cooling, when temperature is down in 330 ℃, naturally cool to again room temperature;

(6) discharging, size as requested cuts into plate, and grinding and polishing, deburring get final product.

Performance test:

The folding strength test: adopt MC009-wds10M type electronic universal material property testing machine to utilize the folding strength of three-point bending method working sample, (9mm * 7mm * 85mm) test calculates folding strength, averages at last to get 6 strip samples.

Microsclerometry: with the hardness of HXD-1000 digital micro-analysis hardness-testing device working sample, each sample is surveyed three points, represents its microhardness with mean value, surveys altogether three samples, calculates at last the mean value of the microhardness of three samples.

Water resistance test: adopt powder to soak weight-loss method and measure (DTN12116), sample is pulverized, get 40 now, microcrystalline glass powder 2 grams on 60 orders, in the 50ml volumetric flask, add water to scale, insulation is 60 minutes under 98 ± 0.5 ℃ of temperature, measures its 100cm ²Rate of weight loss (mg/100cm ²).

Test result:

1, sample appearance quality: surface compact, the defectives such as pore-free, surface of polished light.

2, mechanical property: average folding strength 89.1MPa, average microhardness 893.2kgf/mm ²

3, hydrolysis grade: 1 grade, rate of weight loss is: 0.283mg/100cm ²

Claims (2)

1. devitrified glass take potassium felspar sand as major ingredient is characterized in that it is comprised of the raw material of following weight parts:

Potassium felspar sand 56-61, albite 19-25, ground silica 10-14, silicon-dioxide 8-13, calcium oxide 8-10, yellow soda ash 8.5-10, Calcium Fluoride (Fluorspan) 6.5-8, salt 6-8, potassium oxide 6-7, zinc oxide 5-7, aluminum oxide 4.5-6, sodium oxide 1-2, magnesium oxide 2.5-3, charcoal 3.5-4, gypsum 2-3, boron oxide 3.2-5, talcum powder 2-3, borax 2-4, Lithium Oxide 98min 1.5-2, modification plant ash 2.3-3, nickel oxide 0.13-0.2, titanium dioxide 0.6-0.7, antimonous oxide 0.8-1.2, potassium felspar sand 0.3-0.4;

The preparation method of described modification plant ash is: plant ash is used 10-15% salt acid soak 3-4 hour, and deionized water wash soaked 3-4 hour with the 10-12% sodium hydroxide solution again, and is extremely neutral with deionized water wash again, dries, and is ground into ultrafine powder.

2. the preparation method of the devitrified glass take potassium felspar sand as major ingredient as claimed in claim 1 is characterized in that may further comprise the steps:

(1) feed composition except modification plant ash is mixed to join in the glass-melting furnace, under 1550-1620 ℃ high temperature melting 2-3 hour, be down to again 1450-1470 ℃ of lower clarification 1.8-2 hour, make glass metal;

(2) glass metal with the clarification of above-mentioned surface directly drops in the water, and cold quenching becomes the glass cullet body, adds in the ball mill, and it is the glass powder of 0.05-0.07mm that ball milling becomes fineness, oven dry;

(3) glass powder that obtains is mixed with the modification plant ash of above-mentioned weight part, add the modified glass body powder of compound weight 2-4%, mix, at the 62-65MPa forming under the pressure, obtain green compact;

The preparation method of described modified glass body powder is: be that the plant ash of 10-20, the flyash that weight part is 50-60, attapulgite, the weight part that weight part is 15-20 are the calcite of 30-32 with weight part, mix and add in the glass-melting furnace, be heated under 1550-1600 ℃ the high temperature, melting 2-3 hour, be down to again 1400-1450 ℃ of lower clarification 1.5-2 hour, make glass metal, obtain broken glass body in the cold water of then quenching, grind to form again 3-5 μ m modified glass body powder;

(4) green compact are put into high temperature box type resistance furnace, temperature schedule: at room temperature be warmed up to 300-350 ℃ with 6-8 ℃/min speed; Be warmed up to 750-800 ℃ with 3-4 ℃/min speed again, insulation 1-1.5h; And then be heated to 1250-1260 ℃ with 5-8 ℃/min speed, insulation 3-3.5h;

(5) annealing: the glass after the above-mentioned crystallization is carried out anneal with the annealing cooling rate of 3-5 ℃/min, when temperature is down in 580-600 ℃, kept constant temperature 30-40 minute, and then 7-8 ℃/min speed is warmed up to 820-850 ℃, and then with 5-7 ℃/min speed continuation cooling, when temperature is down in 250-330 ℃, naturally cool to again room temperature;

(6) discharging, size as requested cuts into plate, and grinding and polishing, deburring get final product.