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Diopside reinforced mica-based machinable microcrystalline glass and preparation method thereof

A technology of glass-ceramics and diopside, which is applied in the field of machinable mica glass-ceramics materials, can solve the problems of low strength, poor wear resistance, and low hardness of mica glass-ceramics, achieve good processability and improve product performance , The effect of simplifying the production process

Inactive Publication Date: 2020-02-18
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the layer structure of mica makes mica glass-ceramic have low strength, low hardness (Mohs hardness 2-4), and poor wear resistance. Therefore, improving the hardness and toughness of mica glass-ceramics has become the core technical problem of this project.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw materials: the glass-ceramic has the following composition according to the mass percentage

[0035] SiO 2 53%;

[0036] MgO 22%;

[0037] CaF 2 6%;

[0038] Na 2 O+K 2 O 9%;

[0039] Li 2 O+ BaO 3%.

[0040] Process: (1) Ingredients: According to the above proportions, the ingredients are accurately mixed, and the raw materials are ground and mixed evenly;

[0041] (2) Melting: Melt the batch material at 1450°C, and then cool down to 1100°C for forming (forming methods that can be used: casting method, calendering method and float method);

[0042] (3) Annealing: Immediately transfer the above glass plate to a 500°C annealing furnace and cool to room temperature;

[0043] (4) Heat treatment: heat the above-mentioned glass plate at a temperature of 620°C for 1 hour, then raise the temperature to 940°C and hold it for 0.5 hour at a heating rate of 10°C / min.

Embodiment 2

[0045] Raw materials: the glass-ceramic has the following composition according to the mass percentage

[0046] SiO 2 55%;

[0047] MgO 24%;

[0048] CaF 2 7%;

[0049] Na 2 O+K 2 O 13%;

[0050] Li 2 O+ BaO 4%.

[0051] Process: (1) Ingredients: According to the above proportions, the ingredients are accurately mixed, and the raw materials are ground and mixed evenly;

[0052] (2) Melting: Melt the batch material at 1410°C, and then cool down to 1050°C for forming (forming methods that can be used: casting method, calendering method and float method);

[0053] (3) Annealing: Immediately transfer the above glass plate to an annealing furnace at 530°C and cool to room temperature;

[0054] (4) Heat treatment: heat the above-mentioned glass plate at a temperature of 630°C for 1 hour, then raise the temperature to 930°C and hold it for 0.5 hour at a heating rate of 10°C / min.

Embodiment 3

[0056] Raw materials: The glass-ceramic has the following composition according to the mass percentage

[0057] SiO 2 56%;

[0058] MgO 23%;

[0059] CaF 2 5.7%;

[0060] Na 2 O+K 2 O 8%;

[0061] Li 2 O+ BaO 8%.

[0062] Process: (1) Ingredients: According to the above proportions, the ingredients are accurately mixed, and the raw materials are ground into powder and mixed evenly;

[0063] (2) Melting: Melt the batch material at 1470°C, and then cool down to 1130°C for forming (forming methods that can be used: casting method, calendering method and float method);

[0064] (3) Annealing: Immediately transfer the above glass plate to an annealing furnace at 510°C and cool to room temperature;

[0065] (4) Heat treatment: heat the above-mentioned glass plate at a temperature of 610°C for 1 hour, then increase the temperature to 1010°C and hold it for 0.5 hour at a heating rate of 10°C / min.

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Abstract

The invention relates to machinable mica microcrystalline glass with high hardness and high toughness and a preparation method thereof. The mica microcrystalline glass is composed of the following ingredients by the mass percentage: 45% to 65% of SiO2, 16% to 26% of MgO, 4% to 10% of CaF2, 8% to 14% of Na2O and K2O and 2% to 9% of Li2O and BaO. The complex-phase reinforced mica microcrystalline glass is prepared by an integral crystallization method, and is characterized in that compared with glass prepared by a sintering method, the mica microcrystalline glass prepared by the integral crystallization method is compact in structure, high in crystallinity and suitable for large-scale continuous production. The hardness of the prepared microcrystalline glass can reach 5.51-6.94 GPa, and thefracture toughness of the prepared microcrystalline glass can reach 1.4-2.5 MPa*m<1 / 2>. By controlling the precipitation of mica and diopside crystals, the hardness and toughness of the microcrystalline glass can be practically improved on the premise of not influencing the processability of the mica microcrystalline glass, and the mica microcrystalline glass has wide application prospects in thefields of dental materials, building and ornament materials, mobile terminal equipment materials and the like.

Description

technical field [0001] The invention relates to the field of glass-ceramics, in particular to a machinable mica glass-ceramic material with high hardness and high toughness and a manufacturing method thereof. Background technique [0002] Glass-ceramics, also known as glass-ceramics, is a material containing a large number of microcrystals obtained by controlling the crystallization of glass during heating. It has the respective advantages of glass and ceramics. After nearly 40 to 50 years of research, this new type of material has been rapidly developed in preparation and practical production applications. [0003] Glass-ceramics has high flexural strength and microhardness, but its fracture toughness is low and its machinability is poor. It is prone to cracks during mechanical processing, resulting in uneven fractures, affecting the appearance, and even causing product damage. scrapped. [0004] In the application of mechanical mechanical materials, various mechanical an...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B32/02
CPCC03B32/02C03C10/16
Inventor 康俊峰李安健岳云龙尹立卿安越李升
Owner UNIV OF JINAN
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