CN103922588A - Thermal shock-resistant glass for vacuum bottle liner and preparation method - Google Patents

Abstract

The invention discloses thermal shock-resistant glass for a vacuum bottle liner and a preparation method thereof. The thermal shock-resistant glass is prepared from the following raw materials, by weight, 75-85 parts of sea sand, 15-25 parts of limestone, 10-15 parts of wollastonite, 10-15 parts of magnesite, 15-20 parts of flint clay, 5-10 parts of red mud, 20-30 parts of cullet, 8-12 parts of fluorite, 4-6 parts of borax, 3-5 parts of calcium phosphate, 2.5-4.5 parts of saltcake, 3.5-5.5 parts of mica powder and 3-6 parts of graphene. The thermal shock-resistant glass provided by the invention has low thermal expansion coefficient, good heat stability and excellent thermal shock resistance. By the use of the thermal shock-resistant glass, rupture caused by thermal shock is avoided, and service life of a vacuum bottle is prolonged.

Description

Heat shock resistance glass and preparation method thereof for a kind of inner container for thermos flask

Technical field

The present invention relates to a kind of glass and preparation method thereof, be specifically related to heat shock resistance glass and preparation method thereof for a kind of inner container for thermos flask.

Background technology

Vacuum flask, a kind of articles for daily use, have many uses, can be used for storing hot water, hold cold drink and medicine, vacuum flask is comprised of inner bag, shell and optional feature, wherein inner bag is the core component of vacuum flask, by double glazing, made, the two sides in interlayer plates the metals such as silver, and centre is evacuated, bottleneck has stopper, can keep in a long time the temperature in bottle.But the inner container for thermos flask on existing market is under the impact of boiling water, and mouthful bottle and body produce larger transient heat stress, cause glass liner to break, and have limited the work-ing life of vacuum flask.

Summary of the invention

The object of the present invention is to provide heat shock resistance glass and preparation method thereof for a kind of inner container for thermos flask, improve the thermostability of glass liner, extend the work-ing life of vacuum flask.

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

An inner container for thermos flask heat shock resistance glass, is made by the raw material of following weight part: extra large sand 75-85, Wingdale 15-25, wollastonite 10-15, magnesia 10-15, flint clay 15-20, red mud 5-10, glass cullet 20-30, fluorite 8-12, borax 4-6, calcium phosphate 3-5, saltcake 2.5-4.5, mica powder 3.5-5.5, Graphene 3-6.

A preparation method for heat shock resistance glass for inner container for thermos flask, comprises the following steps:

(1) getting extra large sand, Wingdale, wollastonite, magnesia mixes, pulverize, cross 50-100 mesh sieve, wet ball grinding 12-24h is dried at 110-120 ℃ of temperature, treat after moisture drying compound from room temperature, to be warming up to 840-880 ℃ with the speed of 200-250 ℃/h, calcining 1-2h, and then be warming up to 1180-1260 ℃ with the speed of 150-200 ℃/h, after calcining 2-3h, take out also shrend and become particle, dry, obtain beaded glass material;

(2) getting flint clay, red mud, glass cullet, fluorite mixes, pulverize, after crossing 100-150 mesh sieve, mix with borax, calcium phosphate, saltcake, mica powder, Graphene, then drop in smelting furnace and carry out high temperature melting, temperature of fusion is 1650-1750 ℃, and fusion clear 80% when above, the beaded glass material that adds again step (1) to make, stir, continue fusing 4-6h, obtain melten glass liquid;

(3) the melten glass liquid of step (2) gained is poured into blow molding in mould, the thermal treatment of annealing when the glass temperature after to be formed is down to 500-600 ℃: be first warming up to 720-760 ℃ with 3-6 ℃/min, insulation 2-3h, then with 5-10 ℃/min, be cooled to 440-480 ℃, insulation 5-7h; Then with 2-5 ℃/min, be warming up to 660-720 ℃, insulation 2-3h, then with 4-8 ℃/min, be warming up to 950-980 ℃, insulation 1-2h; Then with 8-12 ℃/min, be cooled to 700-750 ℃, insulation 2-3h, then with 10-15 ℃/min, be cooled to 100 ℃ and can come out of the stove below, air cooling is to room temperature;

(4) by cooled glass gob through aftertreatment, packing is finished product after the assay was approved.

Beneficial effect of the present invention:

Vacuum flask thermal expansion coefficient of glass of the present invention is low, and Heat stability is good has excellent thermal shock resistance, avoids, because of breaking that thermal shocking causes, having extended the work-ing life of vacuum flask.

Embodiment

Below in conjunction with specific embodiment, the present invention is further illustrated.

Embodiment

Getting the raw material of following weight (kg) makes: extra large sand 80, Wingdale 20, wollastonite 12, magnesia 10, flint clay 18, red mud 7, glass cullet 25, fluorite 10, borax 5, calcium phosphate 4, saltcake 3.5, mica powder 4.5, Graphene 5.

The preparation method of heat shock resistance glass for inner container for thermos flask, comprises the following steps:

(1) getting extra large sand, Wingdale, wollastonite, magnesia mixes, pulverize, cross 80 mesh sieves, wet ball grinding 24h is dried at 110 ℃ of temperature, treat after moisture drying compound from room temperature, to be warming up to 860 ℃ with the speed of 250 ℃/h, calcining 1h, and then be warming up to 1220 ℃ with the speed of 200 ℃/h, after calcining 2h, take out also shrend and become particle, dry, obtain beaded glass material;

(2) getting flint clay, red mud, glass cullet, fluorite mixes, pulverize, after crossing 1000 mesh sieves, mix with borax, calcium phosphate, saltcake, mica powder, Graphene, then drop in smelting furnace and carry out high temperature melting, temperature of fusion is 1710 ℃, and fusion clear 80% when above, the beaded glass material that adds again step (1) to make, stir, continue fusing 5h, obtain melten glass liquid;

(3) the melten glass liquid of step (2) gained is poured into blow molding in mould, the thermal treatment of annealing when the glass temperature after to be formed is down to 550 ℃: first with 4 ℃/min, be warming up to 740 ℃, insulation 2h, then with 8 ℃/min, be cooled to 450 ℃, insulation 6h; Then with 3 ℃/min, be warming up to 680 ℃, insulation 3h, then with 6 ℃/min, be warming up to 970 ℃, insulation 1h; Then with 10 ℃/min, be cooled to 720 ℃, insulation 2h, then with 15 ℃/min, be cooled to 100 ℃ and can come out of the stove below, air cooling is to room temperature;

(4) by cooled glass gob through aftertreatment, packing is finished product after the assay was approved.

The performance test of the vacuum flask glass that the present invention makes is as shown in the table:

Project	Unit	Test result
			Flexural strength	MPa	92
Young's modulus	GPa	64
			Poisson's ratio	--	0.27
Linear expansivity (room temperature-300 ℃)	10 -6×K -1	6.2

Claims (2)

1. an inner container for thermos flask heat shock resistance glass, it is characterized in that, by the raw material of following weight part, made: extra large sand 75-85, Wingdale 15-25, wollastonite 10-15, magnesia 10-15, flint clay 15-20, red mud 5-10, glass cullet 20-30, fluorite 8-12, borax 4-6, calcium phosphate 3-5, saltcake 2.5-4.5, mica powder 3.5-5.5, Graphene 3-6.

2. the preparation method of heat shock resistance glass for inner container for thermos flask according to claim 1, is characterized in that comprising the following steps:

(1) getting extra large sand, Wingdale, wollastonite, magnesia mixes, pulverize, cross 50-100 mesh sieve, wet ball grinding 12-24h is dried at 110-120 ℃ of temperature, treat after moisture drying compound from room temperature, to be warming up to 840-880 ℃ with the speed of 200-250 ℃/h, calcining 1-2h, and then be warming up to 1180-1260 ℃ with the speed of 150-200 ℃/h, after calcining 2-3h, take out also shrend and become particle, dry, obtain beaded glass material;

(2) getting flint clay, red mud, glass cullet, fluorite mixes, pulverize, after crossing 100-150 mesh sieve, mix with borax, calcium phosphate, saltcake, mica powder, Graphene, then drop in smelting furnace and carry out high temperature melting, temperature of fusion is 1650-1750 ℃, and fusion clear 80% when above, the beaded glass material that adds again step (1) to make, stir, continue fusing 4-6h, obtain melten glass liquid;

(3) the melten glass liquid of step (2) gained is poured into blow molding in mould, the thermal treatment of annealing when the glass temperature after to be formed is down to 500-600 ℃: be first warming up to 720-760 ℃ with 3-6 ℃/min, insulation 2-3h, then with 5-10 ℃/min, be cooled to 440-480 ℃, insulation 5-7h; Then with 2-5 ℃/min, be warming up to 660-720 ℃, insulation 2-3h, then with 4-8 ℃/min, be warming up to 950-980 ℃, insulation 1-2h; Then with 8-12 ℃/min, be cooled to 700-750 ℃, insulation 2-3h, then with 10-15 ℃/min, be cooled to 100 ℃ and can come out of the stove below, air cooling is to room temperature;

(4) by cooled glass gob through aftertreatment, packing is finished product after the assay was approved.