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CAD/CAM engravable lithium disilicate microcrystalline glass for dentistry and preparation method thereof

A technology of glass-ceramics and lithium disilicate, which is applied in the field of glass-ceramics and can solve problems such as low fracture strength

Pending Publication Date: 2018-02-16
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there have been relevant reports on the research of lithium disilicate glass-ceramics in China, and some companies have started production, but the fracture strength of the main index of lithium disilicate glass-ceramics is still lower than that of imported products

Method used

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  • CAD/CAM engravable lithium disilicate microcrystalline glass for dentistry and preparation method thereof
  • CAD/CAM engravable lithium disilicate microcrystalline glass for dentistry and preparation method thereof
  • CAD/CAM engravable lithium disilicate microcrystalline glass for dentistry and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Introducing Rb into the glass formulation 2 O, the main crystal phase of the product is lithium disilicate, and the secondary crystal phase is lithium silicate and lithium phosphate glass-ceramics. The specific preparation steps are as follows:

[0109] 1. Design its basic chemical composition

[0110] SiO 2 : 70%, Li 2 O: 14.6%, Rb 2 O: 6.2%, Al 2 o 3 : 1.94%, P 2 o 5 : 2.72%, ZnO: 1.5%; CeO 2 : 1%, Tb 4 o 7 : 0.3%, MgO: 1%, La 2 o 3 : 0.5%, TiO 2 : 0.24%.

[0111] 2. Material selection

[0112] Use chemically pure or industrially pure drugs for melting, where Rb 2 O was introduced using rubidium carbonate, SiO 2 Introduced using silica powder, Li 2 O was introduced using lithium carbonate, Al 2 o 3 Use aluminum hydroxide to introduce, ZnO to use zinc oxide to introduce, CeO 2 Introduced using cerium oxide, Tb 4 o 7 Terbium heptoxide was introduced, MgO was introduced using magnesium carbonate, La 2 o 3 Introduced using lanthanum oxide, TiO 2 I...

Embodiment 2

[0127] Introducing Rb into the glass formulation 2 O, the main crystal phase of the product is lithium disilicate, and the secondary crystal phase is lithium silicate and lithium phosphate glass-ceramics. The specific preparation steps are as follows:

[0128] 1. Design its basic chemical composition

[0129] SiO 2 : 70%, Li 2 O: 14.6%, Rb 2 O: 5%, Al 2 o 3 : 1.55%, P 2 o 5 : 2.75%, ZnO: 3%, CeO 2 : 1%, Tb 4 o 7 : 0.4%, MgO: 0.5%, La 2 o 3 : 0.5%, TiO 2 : 0.7%.

[0130] 2. Material selection

[0131] Use chemically pure or industrially pure drugs for melting, where Rb 2 O was introduced using rubidium carbonate.

[0132] 3. Ingredients

[0133] Do the ingredients according to the above ingredient list, accurately calculate the required ingredients and carry out the ingredients. After the ingredients are fully ball milled to ensure that the raw materials are mixed evenly.

[0134] 4. Pre-burning

[0135] The prepared raw materials were pre-fired in a muffle fur...

Embodiment 3

[0146] Introducing Rb into the glass formulation 2 O, the main crystal phase of the product is lithium disilicate, and the secondary crystal phase is glass-ceramics of lithium silicate and lithium phosphate. The specific preparation steps are as follows:

[0147] 1. Design its basic chemical composition

[0148] SiO 2 : 70.7%, Li 2 O: 14.34%, Rb 2 O: 6.1%, Al 2 o 3 : 1.92%, P 2 o 5 : 2.73%, CeO 2 : 1%, Tb 4 o 7 : 0.21%, MgO: 2%, La 2 o 3 : 0.5%, TiO 2 : 0.5%.

[0149] 2. Material selection

[0150] Use chemically pure or industrially pure drugs for melting, where Rb 2 O was introduced using rubidium carbonate.

[0151] 3. Ingredients

[0152] Do the ingredients according to the above ingredient list, accurately calculate the required ingredients and carry out the ingredients. After the ingredients are fully ball milled to ensure that the raw materials are mixed evenly.

[0153] 4. Pre-burning

[0154] The prepared raw materials were pre-fired in a muffle fur...

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Abstract

The invention relates to a CAD / CAM engravable lithium disilicate microcrystalline glass for dentistry and a preparation method thereof, and belongs to the field of microcrystalline glass. The CAD / CAMengravable lithium disilicate microcrystalline glass for dentistry comprises the following components in percentage by mass: 60-75% of SiO2, 0.5-8% of Al2O3, 0.5-8% of P2O5, 8-20% of Li2O, 0-5% of B2O3, 2.9-16% of Rb2O, a stabilizer and an additive, wherein the Si / (Rb+Li) mol ratio is 1.8-2.9, and the Rb / Li mol ratio is 0.01-0.2. The preparation method provided by the invention is characterized inthat rubidium oxide is used to reinforce the network structure of the glass, thereby obtaining the rubidium oxide reinforced lithium disilicate microcrystalline glass product.

Description

technical field [0001] The invention relates to a CAD / CAM-engravable lithium disilicate glass-ceramic for dental use and a preparation method thereof, belonging to the field of glass-ceramics. Background technique [0002] Lithium silicate glass-ceramics is a polycrystalline solid in which the crystalline phase and the glass phase are uniformly distributed, which is obtained from the matrix glass through a controlled crystallization heat treatment process. After a certain heat treatment of the matrix glass, a part of the glass phase in the glass is converted into a crystal phase, thereby greatly improving the strength of the material; in addition, due to the existence of the glass phase, the glass-ceramics exhibits good translucence, which can be well Simulates the luster and light transmission of natural teeth. Therefore, lithium silicate glass-ceramics has excellent mechanical properties and translucency, and has become the material of choice for aesthetic restoration of ...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03B19/02C03B25/02C03B32/02C03C4/02C03C4/00
CPCC03C10/0027C03B19/02C03B25/02C03B32/02C03C4/0021C03C4/02
Inventor 刘敬肖史非单正杰王承遇
Owner DALIAN POLYTECHNIC UNIVERSITY
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