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Method for preparing fluorine amphibole glass ceramic by using reactive crystallization-sintering method

A technology for preparing fluorine amphibole and glass ceramics, which is applied in the field of preparation of fluorine amphibole glass ceramics, can solve the problems of complex two-step heat treatment crystallization process, high production cost, inability to use mineral raw materials, etc., and achieves excellent machinability. High performance, high added value of products, and the effect of reducing production costs

Inactive Publication Date: 2012-07-04
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. The glass melting temperature is high (>1500°C), and the energy consumption is large; 2. The second-step heat treatment crystallization process of the glass is complicated; 3. In order to precipitate fluoramphibite crystals in the glass, it is necessary to use a specific composition of fluorine Silicate glass; 4. There are strict restrictions on the composition of glass raw materials, and ordinary mineral raw materials cannot be used, and chemical raw materials must be used
As a result, production costs remain high, making it difficult to apply the material in production even though it has been available for many years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Firstly, the waste glass is sorted, and the colorless flat glass is cleaned, and ball milled to make 200-mesh glass powder. Add 40% leucite crystal powder and 6% magnesium fluoride into the above waste glass powder by weight percentage, and fully mix them in a mixer. Adding 8% of PVA binder accounting for the weight ratio of the mixed powder of glass powder, leucite crystal powder and magnesium fluoride powder. The above-mentioned mixture of glass powder, leucite crystal powder, magnesium fluoride powder and binder is press-molded in a mould, and the pressure is 300 MPa. Put the molded biscuit into an ordinary electric furnace, heat it to 400°C for 2 hours to remove the binder; then raise the temperature to 800°C-1200°C, keep it for 6-8 hours, cool it to room temperature with the furnace, and sinter it to make fluorine Finished amphibole glass ceramics.

Embodiment 2

[0020] Embodiment 2: First, waste glass is sorted, colorless plate glass, window glass and colored bottle glass, window glass are separated, after cleaning, sorting ball milling is made into 100-mesh glass powder. Mix 35% enstatite and cordierite mixed crystal powder and 8% calcium fluoride into the waste glass powder by weight percentage, and mix well with a mixer. Add PVA binder accounting for 5% by weight of glass powder, enstatite and cordierite mixed crystal powder and calcium fluoride mixed powder, and press molding in a mold with a pressure of 150MPa. The molded green body is kept in an ordinary electric furnace at 600°C for 8 hours, dried to remove the binder, then heated to 1000°C for 10 hours, cooled to room temperature with the furnace, and sintered to produce a machinable fluoromica glass-ceramic product.

Embodiment 3

[0021] Embodiment 3: After cleaning the window glass, ball mill it to make glass powder with a mesh size below 150. Add 30% leucite crystal powder and 10% magnesium fluoride powder to the waste glass powder by weight percentage, and fully mix them evenly with a mixer. Then add a PVA binder accounting for 3% by weight of the glass powder leucite crystal powder and magnesium fluoride mixed powder, and press molding in a mold with a pressure of 200 MPa. The molded green body is dried in an ordinary electric furnace at 600°C for 5 hours to remove the binder, then heated to 860°C, held for 5 hours, cooled to room temperature with the furnace, and then sintered to produce a finished fluoramphole glass ceramic.

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Abstract

The invention relates to a method for preparing fluorine amphibole glass ceramic by using a reactive crystallization-sintering method. The method comprises the following steps of: separating waste glass, cleaning and pulverizing to prepare glass powder; adding silicate crystals and fluoride powder with a certain proportion, uniformly mixing and then adding PVA (Polyvinyl Alcohol) adhesive with a weight ratio of 2-10 percent to the mixed powder for mould pressing and molding; and sintering by using an ordinary electric furnace in normal pressure atmosphere to prepare the fluorine amphibole glass ceramic. Compared with the prior art, the method has the advantages of low production cost, simple production process, no need of melting fluosilicate glass with specific components, low sintering temperature, energy saving, and the like. The fluorine amphibole glass ceramic produced by the method has the compressive strength of 150-250 MPa, the bending strength of 50-70 MPa, the density of 2.2-2.4g / cm<3> and good processability, can be drilled and turned by using ordinary machining equipment and provides a novel approach for recycling the waste glass.

Description

technical field [0001] The present invention relates to a kind of preparation technology of fluorampebolite glass-ceramic, especially a kind of production technology of using waste glass as main raw material (>60wt%), directly adding silicate crystal and fluoride sintering to prepare fluorampebolite glass-ceramic, The invention belongs to the field of preparation of engineering ceramics. Background technique [0002] A development trend of material production in the world today is to produce qualified products with the simplest process, the lowest cost, and the least energy and resource consumption. The use of industrial waste to produce new materials is receiving increasing attention. Building an environment-friendly and resource-saving Society, the development of a low-carbon economy has become the consensus of the country and the business community, and the extensive production model that consumes a lot of energy and resources will gradually be eliminated by the market...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00
Inventor 章为夷高宏
Owner DALIAN JIAOTONG UNIVERSITY
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