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Rapid coloring process of lithium disilicate microcrystalline glass

A technology of lithium disilicate and glass-ceramics, which is applied in glass molding, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of affecting the color matching effect and easy wear of the dyed layer, so as to achieve simple process flow, improve translucency and Surface gloss, fast coloring effect

Inactive Publication Date: 2020-11-10
NANJING VOCATIONAL UNIV OF IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, clinical practice shows that the restoration made by external dyeing method is easy to wear due to the thin dyed layer, which affects the original color matching effect.

Method used

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  • Rapid coloring process of lithium disilicate microcrystalline glass
  • Rapid coloring process of lithium disilicate microcrystalline glass
  • Rapid coloring process of lithium disilicate microcrystalline glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: Lithium disilicate glass-ceramic is prepared as follows:

[0034] (1) Weigh the original powder and coloring material respectively according to the proportioning in Table 1, and the coloring material adopted in the present embodiment is CeO 2 , Mix the original powder and color evenly and place them in a muffle furnace to remove carbon and nitrogen respectively, then put them into a high-temperature program-controlled furnace at 1600°C for 30 minutes and 120 minutes of melting, and then pour the melt into a rectangular mold .

[0035] (2) Then put the formed colored glass block into the annealing furnace quickly, heat it at 580° C. for 30 minutes to carry out stress relief annealing, and finally let it cool with the furnace;

[0036] (3) cutting and polishing the colored glass blocks cooled with the furnace, and finally putting them into a program-controlled furnace for nucleation and crystallization treatment, and then obtaining colored lithium disilicat...

Embodiment 2

[0043] Weigh a certain amount of glass raw powder according to the ratio in Table 1, without adding coloring material. According to the preparation method described in Example 1, after melting at 1600°C for 30 minutes, pour a part of the melt into a rectangular mold, then quickly put the formed colored glass block into an annealing furnace, and keep warm at 500°C and 460°C for 30 minutes respectively Perform stress relief annealing and finally allow to cool in the furnace. A preliminarily dyed uncrystallized glass block is obtained. figure 2 It is the color morphological diagram of the uncrystallized glass block. Under the same annealing time of 30 minutes, the annealed glasses at 460°C and 500°C are amber yellow, and the glass is very homogeneous and transparent without obvious defects or bubbles. It shows that this annealing temperature can obtain glass crystals with better uniform color, which meets the requirements of bioaesthetics and the production standards of dental ...

Embodiment 3

[0045] According to the ratio in Table 1, the original powder and the colorant were weighed respectively, and the colorant in this embodiment was Er2 o 3 . According to the preparation method described in Example 1, after melting at 1600°C for 120 minutes, pour a part of the melt into a rectangular mold, then quickly put the formed colored glass block into an annealing furnace, and keep it at 460°C and 540°C for 30 minutes, Heat at 560°C for 30min, 90min and 150min for stress relief annealing, and finally let it cool with the furnace. A dyed glass matrix is ​​obtained, which is then crystallized. Figure 4 It is the physical picture of the final crystallized glass-ceramics at different annealing temperatures. From 530°C, 540°C, 550°C, 560°C to 580°C, the annealed glass changes from light purple to purple to deep purple, and the glass gradually precipitates Filamentous milky white crystals, the glass becomes heterogeneous and transparent, indicating that this process can be u...

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Abstract

The invention discloses a rapid coloring process of lithium disilicate microcrystalline glass. Therapid coloring process comprises the following steps: proportioning and melting, forming, annealing, nucleation and crystallization, repeated vacuum heat treatment and the like. According to the process, melting, annealing and crystallization temperature and time are reasonably selected, so the colored lithium disilicate microcrystalline glass has the advantages of uniform color, no chromatic aberration and favorable semi-permeability and accords with bioesthetics; process flow is simple, and coloring is rapid; the usage of facing porcelain is avoided, so cost is low; a crystal phase in the lithium disilicate glass can be effectively improved through proper repeated heat treatment steps; mechanical strength is improved; and the semitransparent degree and the surface gloss of the glass are effectively improved on the basis of color stabilization.

Description

technical field [0001] The invention belongs to the technical field of coloring lithium disilicate glass-ceramics for dental use, and in particular relates to a rapid coloring method for lithium disilicate glass-ceramics for dental use. Background technique [0002] Tooth defect or loss is one of the common clinical diseases, and its main treatment method is to use various restorative materials to restore the defect tooth, so as to restore the shape and function of the normal tooth. Commonly used repair materials include resin, metal, ceramics, etc. Among them, the application range of ceramic materials is more and more extensive because of its good biological safety and aesthetics. [0003] In oral restoration, people not only hope that the strength and toughness of the tooth restoration should be high, and that the restoration can coordinate with the surrounding soft tissue without irritation and damage to the human body. At the same time, it is expected that the color and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C4/02C03B19/02C03B32/02
CPCC03B19/02C03B32/02C03C4/02C03C10/0009
Inventor 张琪吉昊余任飞仲文吴宇鑫彭媛媛李泳彭兵刘鸿琳林燕喃
Owner NANJING VOCATIONAL UNIV OF IND TECH
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