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ZrO2 (zirconium oxide) and HfO2 (hafnium oxide)-codoped microcrystalline glass of dentistry

A glass-ceramic and dental technology, applied in dentistry, dental preparations, dental prostheses, etc., can solve the problems of mechanical properties and stability not as good as international leading products, achieve stable process, easy to obtain raw materials, and avoid devitrification Effect

Inactive Publication Date: 2017-08-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Correspondingly, the representative commercial glass-ceramic dental materials on the market are products such as Ivoclar’s ​​IPS E.Max Press series and IPS E.Max CAD, whose mechanical properties and aesthetic properties have been greatly improved; while domestic Market-related research and industrialization started relatively late. Although there are some commercial products, their mechanical properties and stability are still far behind international leading products.

Method used

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  • ZrO2 (zirconium oxide) and HfO2 (hafnium oxide)-codoped microcrystalline glass of dentistry
  • ZrO2 (zirconium oxide) and HfO2 (hafnium oxide)-codoped microcrystalline glass of dentistry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: preparation of material and performance test result

[0044] 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 , ZrO 2 and HfO 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. ...

Embodiment 2

[0045] Embodiment 2: preparation of material and performance test result

[0046] 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 , ZrO 2 and HfO 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. ...

Embodiment 3

[0047] Embodiment 3: preparation of material and performance test result

[0048] 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 , ZrO 2 and HfO 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. ...

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Abstract

The invention discloses a ZrO2 (zirconium oxide) and HfO2 (hafnium oxide)-codoped microcrystalline glass of dentistry and a preparation and a use method thereof. The ZrO2 and HfO2-codoped microcrystalline glass is prepared from the following components in parts by mass: 60 to 75% of SiO2 (silicon dioxide), 10 to 25% of Li2O (lithium oxide), 2 to 8% of Na2O (sodium oxide), 2 to 8% of P2O5 (phosphorus pentoxide), 0 to 15% of ZrO2 and 0 to 15% of HfO2, wherein the sum of mass fractions of the components is 100%. The preparation method comprises the following steps of using a smelting and casting method to obtain a glass block; crystallizing and treating, so as to obtain a glass intermediate R2SiO3 (R=Li and Na) which can be easily processed by machines; performing secondary heat treatment, so as to obtain the finished product of the microcrystalline glass using R2Si2O5 (R=Li and Na) as the main crystal phase. The microcrystalline glass has the excellent mechanical properties of bending strength and the like, and can be applied to the full-ceramic restoration materials of dentistry.

Description

technical field [0001] The invention belongs to the field of glass ceramics, in particular to a ZrO 2 , HfO 2 Co-doped dental glass-ceramics and methods of making and using the same. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C4/00C03B32/02A61K6/033A61K6/027A61K6/00A61K6/838
CPCA61K6/15A61K6/35A61K6/833A61K6/838C03B32/02C03C4/0021C03C10/00
Inventor 张腾林城
Owner FUZHOU UNIV
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