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High temperature and high pressure resistant alkali-free aluminosilicate glass for high pressure liquidometer

A high-pressure liquid, high-temperature-resistant technology, used in glass forming, glass furnace equipment, glass manufacturing equipment, etc., can solve the problems of low softening point, poor chemical stability, low Young's modulus, etc., to achieve uniform electric field heat distribution, The effect of uniform distribution of electric field lines and smooth melting process

Inactive Publication Date: 2017-06-06
南京神童特种玻璃技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an alkali-free aluminosilicate glass for high-pressure liquid level gauges resistant to high temperature and pressure, which reasonably solves the problem that the alkali-aluminosilicate glass in the prior art cannot withstand high temperature and high pressure, has low softening point, and low Young's modulus , Excessive expansion coefficient, poor chemical stability, and a series of key problems that the glass size cannot be processed into high-pressure liquid level gauges or other high-pressure glass windows
The main purpose of using a variety of clarifiers is to avoid defects such as poor clarification quality due to excessive concentration of glass liquid, bubble growth and limited discharge time during the use of a single clarifier

Method used

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  • High temperature and high pressure resistant alkali-free aluminosilicate glass for high pressure liquidometer

Examples

Experimental program
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experiment example

[0028] The oxide composition and mass percentage of the alkali-free aluminosilicate glass of the high-temperature and high-pressure resistant high-pressure liquid level gauge are: SiO 2 (55~65)%, Al 2 o 3 (14~25)%, B 2 o 3 (3~8)%, CaO(5~12)%, MgO(4~10)%, BaO(3~8)%, As 2 o 3 (0.2~0.5)%, Sb 2 o 3 (0.2~0.5)%, NaNO 3 (0.1~0.3)%, ZrO 2 (0.2~0.5)%, adopt following technological process experiment and implement:

[0029] First of all, select the glass raw material to make it into the above-mentioned characteristic glass composition, configure it, mix it evenly, and melt it in the pool platinum electric furnace. Or cast into various wafer blanks, which are processed by precision annealing, grinding, polishing and tempering. The result obtained by above-mentioned technical process experiment:

[0030] Table 1, chemical composition (wt.%) and glass performance table of experimental example:

[0031] composition Experimental example 1 Experimental example 2 Exp...

Embodiment 1

[0044] The tempering temperature is preferably 900°C, and the fan flow rate is preferably 15000m 3 / h.

[0045] First of all, according to Table 1 Experimental Example 1 glass component selection main raw material requirements, use quartz sand (150 μm sieve is less than 1%, 45 μm sieve is less than 30%, Fe 2 o 3 content less than 0.01wt.%), calcined alumina (average particle size 50μm), boric acid (400μm sieve is less than 10%, 63μm sieve is less than 10%), high-purity calcium carbonate (average particle size 250μm), high Pure magnesium oxide (average particle size 250 μm), barium carbonate (average particle size 50 μm). Fe in glass raw materials 2 o 3 Carry out strict control, requiring less than 100PPm, finished glass Fe 2 o 3 Less than 150PPm. The clarifying agent uses a variety of clarifying agent raw materials to make the ingredients meet the chemical composition of the glass in Table 1, and then melts it in an all-electric furnace with high thermal efficiency. Afte...

Embodiment 2

[0047] The tempering temperature is preferably 900°C, and the fan flow rate is preferably 15000m 3 / h.

[0048] For the actual composition of the glass, refer to Experimental Example 2 in Table 1, use the same raw materials and requirements as in Example 1, and adopt the same melting process system and test conditions. Table 1 shows the basic properties of the samples. (1) The density is 2.62g / cm 3 ; (2) The average coefficient of thermal expansion within the range of room temperature to 400°C is 45.89×10 -7 / °C; (3) softening temperature (10 5 ~10 7 Poise) 921°C; (4) Bending strength 258Mpa; (5) Transmittance 90.3% (6) Refractive index N d 1.5332 Young's modulus E (10 7 pa)8290

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Abstract

The invention discloses high temperature and high pressure resistant alkali-free aluminosilicate glass for a high pressure liquidometer, and is characterized in that the high temperature and high pressure resistant alkali-free aluminosilicate glass for the high pressure liquidometer comprises the oxide components by the mass percentage: (55-65)% of SiO2, (14-25)% of Al2O3, (3-8)% of B2O3, (5-12)% of CaO, (4-10)% of MgO, (3-8)% of BaO, (0.2-0.5)% of As2O3, (0.2-0.5)% of Sb2O3, (0.1-0.3)% of NaNO3, and (0.2-0.5)% of ZrO2. The glass contains no alkali metal oxides in the composition, has the advantages of high temperature resistance, high pressure resistance, high tenacity, high Young modulus, good chemical stability, suitable expansion coefficient of physical tempering, high transparency and the like, and is applied in requirements of high temperature and high pressure resistant glass view windows for harsh work condition environments of high temperature and high pressure steam liquidometer observation windows, high pressure pipeline view mirrors, deep-sea exploration equipment observation windows and the like in steel metallurgy, petrochemical engineering, thermal power plants and other industries.

Description

technical field [0001] The invention relates to the technical field of glass manufacturing, in particular to an alkali-free aluminosilicate glass for high-pressure liquid level gauges resistant to high temperature and high pressure. Background technique [0002] With the continuous innovation and development of various new energy sources, new materials, and new technologies, as well as the needs of seabed resource exploration, various petrochemical, refining and cracking devices, thermal power plants, thermal power plants, etc. Development requires the development of high temperature resistance, high pressure resistance, high toughness, and expansion coefficient suitable for physical tempering. The expansion coefficient of the glass is required to be ﹙40~50﹚×10 -7 Between / ℃, glass windows with good thermal shock resistance, the aluminosilicate glass products of the prior art can only produce ultra-thin aluminosilicate glass with alkali, which is manufactured by float proce...

Claims

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Application Information

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IPC IPC(8): C03C3/093C03C1/00C03B5/027C03B5/235C03B19/02C03B15/02G01F23/02
CPCC03C3/093C03B5/027C03B5/235C03B15/02C03B19/02C03C1/004G01F23/02
Inventor 陈玉林
Owner 南京神童特种玻璃技术有限公司
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