A kind of black fluorine-free glass-ceramic for tombstone and its preparation method

A technology of glass-ceramics and black, which is applied in the field of black fluorine-free glass-ceramics for tombstones and its preparation. It can solve the problems of unstable slag composition, shortened kiln life, and difficult production control, and achieves good color brightness and energy saving. Process steps, low cost effect

Active Publication Date: 2016-09-14
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent applications with application numbers 200910254616.0, 200910309590.5, and 200910309618.5 respectively report the use of molybdenum tailings, gold tailings, and lead-zinc-copper tailings to prepare black glass-ceramic plates, but the use of tailings slag to prepare glass-ceramics has unstable slag components. , the problem that the production is not easy to control
Publication No. CN 1056857A discloses the manufacture of a black glass-ceramic, but it contains fluoride, which pollutes the environment and reduces the life of the kiln

Method used

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  • A kind of black fluorine-free glass-ceramic for tombstone and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The weight percentages of glass are:

[0059] SiO 2 : 49.6%; Al 2 o 3 : 18.4%; CaO: 10%; MgO: 5%; Na 2 O: 9.1%; TiO 2 : 4%; Fe 2 o 3 : 3%; Co 2 o 3 : 0.2%; Ni 2 o 3 : 0.7%.

[0060] The preparation method is:

[0061] a) Calculate and accurately weigh according to the composition design formula, use a single-head ball mill, and mix for 15 minutes with a material-to-ball ratio of 1:2 to obtain a uniformly mixed glass batch;

[0062] b) Melt the above-mentioned batch materials in a high-temperature lifting furnace at a temperature of 1590°C for 3.5 hours to obtain a clear and uniform molten glass;

[0063] c) Pour the above-mentioned uniform glass liquid into a preheated graphite mold for molding to obtain a black glass-ceramic matrix;

[0064] d) Put the above-mentioned matrix glass-ceramic directly into the crystallization furnace, hold at 750°C for 1 hour for nucleation, hold at 1040°C for crystallization for 1 hour, then hold at 840°C for 2 hours for heat...

Embodiment 2

[0066] The weight percentage of glass is the same as in Example 1.

[0067] Calendering preparation process is:

[0068] a) weighing, batching, and mixing uniformly according to the raw material components to obtain the batch;

[0069] b) Put the batch material prepared in step a) into the electric melting furnace, the melting temperature is 1590°C, and the uniform glass liquid enters the calender through the flow hole, the ascending channel, and the forehearth; the glass liquid cools down through the forehearth, enters the The temperature of the calender is 967°C, and the temperature of the exit calender roll is about 846°C, forming a glass plate with a thickness of 18-20mm;

[0070] c) The glass plate obtained in step b) is sent to the heat treatment kiln through the transition roller table, nucleated at a nucleation temperature of 750°C for 1 hour, crystallized at a crystallization temperature of 1040°C for 1 hour, and finally in a temperature range of 800~840°C Annealing...

Embodiment 3

[0073] The weight percentages of glass are:

[0074] SiO 2 : 40%; Al 2 o 3 : 18%; CaO: 14.2%; MgO: 7%; Na 2 O: 5.4%; K 2 O: 4.3%; TiO 2 : 5.6%; Fe 2 o 3 : 5%; Co 2 o 3 : 0.3%; Ni 2 o 3 : 0.2%.

[0075] The preparation method is:

[0076] a) Calculate and accurately weigh according to the composition design formula, use a single-head ball mill, and mix for 15 minutes with a material-to-ball ratio of 1:2 to obtain a uniformly mixed glass batch;

[0077] b) Melt the above-mentioned batch materials in a high-temperature lifting furnace at a temperature of 1520°C for 2 hours to obtain a clear and uniform molten glass;

[0078] c) Pour the above-mentioned uniform glass liquid into a preheated graphite mold for molding to obtain a black glass-ceramic matrix;

[0079] d) Put the above-mentioned matrix glass-ceramic directly into the crystallization furnace, hold at 680°C for 30 minutes for nucleation, hold at 950°C for crystallization for 20 minutes, then hold at 816°C f...

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Abstract

The invention discloses black fluoride-free microcrystalline glass for gravestones. The raw material of the black fluoride-free microcrystalline glass comprises the following components in percentage by weight: 37-52% of SiO2, 18-28% of Al2O3, 10-16% of CaO, 5-12% of MgO, 4-10% of Na2O and / or K2O, 7-18% of TiO2 and Fe2O3, 0-0.5% of Co2O3 and 0.1-2% of Ni2O3. The invention further provides a preparation method of the microcrystalline glass. The black fluoride-free microcrystalline glass for gravestones, disclosed by the invention, contains no fluoride to prevent the fluoride from eroding a refractory material and save the cost; the black fluoride-free microcrystalline glass is suitable for molding by a rolling process, excellent in performance, stable in production and beneficial to cope with challenges of resource environments.

Description

technical field [0001] The invention relates to a glass-ceramic and a preparation method thereof, in particular to a black fluorine-free glass-ceramic for tombstones and a preparation method thereof. Background technique [0002] Glass-ceramic, also known as glass ceramics or crystallized glass, is a type of polycrystalline material containing a large number of microcrystalline phases and glass phases, which is obtained by controlling the crystallization of a specific composition of basic glass during the heating process. solid material. Glass-ceramics is an important new inorganic non-metallic material with high mechanical strength, hardness, remarkable corrosion resistance and good thermal shock resistance. It is widely used in construction, daily use, electronics, chemical industry, military industry, Aerospace, biology and new optics and other fields. [0003] The human use of stone to create fine arts has a long history. In the history of architectural culture of vari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/02C03C10/00
Inventor 骞少阳程金树袁坚邓鑫鹏郑伟宏李诗文
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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