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Lithium sodium codoping dental nucleated glass, and preparation and application thereof

A glass-ceramic and dental technology, applied in the direction of dental preparations, dentistry, dental prosthesis, etc., to achieve the effect of easy-to-obtain raw materials, increase strength, and promote the crystallization process

Inactive Publication Date: 2017-08-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of existing achievements, domestic patent application numbers CN201410271711.2, CN201510246538.5, and CN201610084411.2 mainly adopt the powder hot die-casting method, and their main performance indicators such as bending strength are still lower than those of mainstream products in the international market (360~400MPa). Not a small gap

Method used

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  • Lithium sodium codoping dental nucleated glass, and preparation and application thereof
  • Lithium sodium codoping dental nucleated glass, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] According to the ratio of each component in Table 1, a certain amount of analytically pure raw material (SiO 2 , Li 2 CO 3 、Na 2 CO 3 , NH 4 h 2 PO 4 and ZrO 2 ), use a ball mill to mix evenly for 8 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, and heat it at 4°C / min to 330°C and 850°C for 1 hour each to remove nitrogen and carbon , continue to heat up to 1500°C and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain fragments of glass melt; ball mill again, and the powder is directly heated to 1500°C / 1 hour for remelting ;Cast the remelted molten glass into a mold preheated at 550°C, quickly put it into a resistance furnace, heat it at 500°C for 10 minutes, then immediately rise to 550°C and hold it for 30 minutes, then cool with the furnace. The cast glass block is first subjected to nucleation at 625°C / 1 hour and crystalliz...

Embodiment 2

[0045] According to the ratio of each component in Table 1, a certain amount of analytically pure raw material (SiO 2 , Li 2 CO 3 、Na 2 CO 3 , NH 4 h 2 PO 4 and ZrO 2 ), use a ball mill to mix evenly for 8 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, and heat it at 4°C / min to 330°C and 850°C for 1 hour each to remove nitrogen and carbon , continue to heat up to 1500°C and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain fragments of glass melt; ball mill again, and the powder is directly heated to 1500°C / 1 hour for remelting ;Cast the remelted molten glass into a mold preheated at 550°C, quickly put it into a resistance furnace, heat it at 500°C for 10 minutes, then immediately rise to 550°C and hold it for 30 minutes, then cool with the furnace. The cast glass block is first subjected to nucleation at 610°C / 1 hour and crystalliz...

Embodiment 3

[0047] According to the ratio of each component in Table 1, a certain amount of analytically pure raw material (SiO 2 , Li 2 CO 3 、Na 2 CO 3 , NH 4 h 2 PO 4 and ZrO 2 ), use a ball mill to mix evenly for 8 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, and heat it at 4°C / min to 330°C and 850°C for 1 hour each to remove nitrogen and carbon , continue to heat up to 1500°C and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain fragments of glass melt; ball mill again, and the powder is directly heated to 1500°C / 1 hour for remelting ;Cast the remelted molten glass into a mold preheated at 550°C, quickly put it into a resistance furnace, heat it at 500°C for 10 minutes, then immediately rise to 550°C and hold it for 30 minutes, then cool with the furnace. The cast glass block is first subjected to nucleation at 605°C / 1 hour and crystalliz...

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Abstract

The invention discloses lithium sodium codoping dental nucleated glass, and a preparation and application thereof. The dental nucleated glass is prepared from the following ingredients in percentage by mass: 65 to 75 percent of SiO2, 5 to 20 percent of Li2O, 5 to 20 percent of Na2O, 4 to 6 percent of P2O5 and 4 to 6 percent of ZrO2, wherein the mass percent sum of the raw materials is 100 percent. The raw materials are treated by a molten casting method to obtain a glass block body; through crystallization treatment, a glass intermediate R2SiO3(R=Li and Na) capable of realizing mechanical processing is obtained; then, through secondary heating treatment, the nucleated glass finished product using R2Si2O5(R=Li and Na) as major crystalline phases is obtained. The nucleated glass finished product has excellent mechanical properties such as excellent bending strength, and can be used as a dental all-ceramic restorative material.

Description

technical field [0001] The invention belongs to the field of glass-ceramics, in particular to a lithium-sodium co-doped dental glass-ceramics and its preparation and application. Background technique [0002] Teeth are an important part of the human body. In today's society, the problem of dental restoration is becoming more and more prominent. Choose suitable restoration materials to make higher strength and more beautiful dentures (commonly known as "dentures") to restore and decorate the teeth to restore the teeth. Biological function and beautiful appearance have become research hotspots. Dental all-ceramic restorations Silicate-based glass-ceramic materials (such as lithium disilicate Li 2 Si 2 o 5 , Li 2 O 2SiO 2 ) has a broader application prospect because of its mechanical properties and semi-permeability closer to natural teeth, easy machining and other advantages. At present, the commonly used glass-ceramic molding processes include hot die-casting and comput...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03B32/02A61K6/033A61K6/027A61K6/00A61K6/838
CPCA61K6/15A61K6/833A61K6/838C03B32/02C03C10/0009
Inventor 张腾林城
Owner FUZHOU UNIV
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