Lithium disilicate glass ceramic, preparation method thereof and application in dental material

A technology of glass-ceramic and lithium disilicate, applied in dentistry, dental preparations, dental prostheses, etc., can solve problems such as unsatisfactory mechanical properties and changes in performance of lithium disilicate glass-ceramics

Active Publication Date: 2017-02-01
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The obtained lithium metasilicate glass-ceramic material has good processability, but the mechanical properties are not ideal enough
[0006] It is worth noting that even though many patents contain Li 2 O, SiO 2 、Al 2 o 3 ,P 2 o 5 、K 2 O and other components, but very slight changes in the content of these components will lead to great changes in the properties of lithium disilicate glass-ceramics

Method used

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  • Lithium disilicate glass ceramic, preparation method thereof and application in dental material
  • Lithium disilicate glass ceramic, preparation method thereof and application in dental material
  • Lithium disilicate glass ceramic, preparation method thereof and application in dental material

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Embodiment 1

[0081] This embodiment provides a lithium disilicate glass-ceramic, and the components included in the lithium disilicate glass-ceramic are shown in Table 1 in terms of mass percentage.

[0082] The preparation method of above-mentioned lithium disilicate glass-ceramics is as follows:

[0083] (1) According to the content of each component in the lithium disilicate of table 1, calculate and take the raw material of corresponding amount, described Li 2 O and K 2 O respectively with raw material Li 2 CO 3 and K 2 CO 3 Introduced in the form of P 2 o 5 Raw material NH 4 h 2 PO 5 Introduced in the form of SiO 2 、Al 2 o 3 and TbO 2 form introduced.

[0084] (2) Mix the raw materials, ball mill for 4 hours, and the dried product is calcined, shaped and annealed: put it into a 50ml corundum crucible, heat it up to 590°C in a silicon-molybdenum resistance furnace at 4°C / min for 2h, and then heat it at 4°C / min Raise the temperature to 1300°C, keep it warm for 1 hour, pou...

Embodiment 2

[0092] This embodiment provides a lithium disilicate glass-ceramic, and the components included in the lithium disilicate glass-ceramic are shown in Table 1 in terms of mass percentage.

[0093] The preparation method of above-mentioned lithium disilicate glass-ceramics is as follows:

[0094] (1) According to the content of each component in the lithium disilicate of table 1, calculate and take the raw material of corresponding amount, described Li 2 O and K 2 O respectively with raw material Li 2 CO 3 and K 2 CO 3 Introduced in the form of P 2 o 5 Raw material NH 4 h 2 PO 5 Introduced in the form of SiO 2 、Al 2 o 3 and TbO 2 form introduced.

[0095] (2) Mix the raw materials, ball mill for 4 hours, and the dried product is calcined, formed and annealed: put in a 50ml corundum crucible, heat up to 590°C in a silicon-molybdenum resistance furnace for 2 hours, and then heat up at 4°C / min To 1400°C, heat preservation for 1 hour, after pouring into a pre-heated gr...

Embodiment 3

[0103] This embodiment provides a lithium disilicate glass-ceramic, and the components included in the lithium disilicate glass-ceramic are shown in Table 1 in terms of mass percentage.

[0104] The preparation method of above-mentioned lithium disilicate glass-ceramics is as follows:

[0105] (1) According to the content of each component in the lithium disilicate of table 1, calculate and take the raw material of corresponding amount, described Li 2 O and K 2 O respectively with raw material Li 2 CO 3 and K 2 CO 3 Introduced in the form of P 2 o 5 Raw material NH 4 h 2 PO 5 Introduced in the form of SiO 2 、Al 2 o 3 and TbO 2 form introduced.

[0106] (2) Mix the raw materials in step (1), ball mill for 4 hours, and the dried product is calcined, shaped and annealed: put in a 50ml corundum crucible, heat up to 590℃ in a silicon-molybdenum resistance furnace at 4℃ / min for 2 hours, and then Raise the temperature to 1450°C at 4°C / min, keep it warm for 0.8 hours, p...

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Abstract

The invention belongs to the field of medical materials and relates to a lithium disilicate glass ceramic, a preparation method thereof and application. The lithium disilicate glass ceramic is prepared from, by mass, SiO2 55%-65%, Li2O 16%-24%, P2O52 2%-5%, Al2O3 8%-12%, K2O 2%-5% and TbO2 1%-10%. According to the method, raw materials are subjected to pre-sintering, calcination, molding by casting and then are subjected to annealing, coring and crystallization to prepare a lithium metasilicate glass ceramic block, the lithium metasilicate glass ceramic block has very good machinability, and heat treatment is performed again after machining to obtain the lithium disilicate glass ceramic. The lithium disilicate glass ceramic prepared by the preparation method is doped with a specific content of rare earth element Tb, a glass grid structure can be destroyed, the viscosity can be reduced, crystallization is promoted, the hardness and bending strength of the glass ceramic are improved, and a novel method is provided for preparation of the lithium disilicate glass ceramic.

Description

technical field [0001] The invention belongs to the field of medical dental materials, and relates to a lithium disilicate glass-ceramic, its preparation method and application, in particular to a lithium disilicate glass-ceramic, its preparation method and its application to dental materials. Background technique [0002] Glass-ceramic materials have been more and more widely used in dental restorations. Lithium disilicate glass-ceramics can be used as a dental restoration material with good mechanical properties, high bending strength, hardness, At the same time, due to the existence of the glass phase, it has good translucency, which can imitate the transparency of natural teeth. At the same time, it has incomparable biocompatibility and aesthetic performance of other materials. An ideal dental restorative material needs not only sufficient mechanical properties to meet functional requirements, but also the ability to simulate the color and luster of natural teeth to mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03B32/02A61K6/02
CPCA61K6/836C03B32/02C03C10/0009
Inventor 罗绍华包硕胡东北文潇王庆刘延国王志远张亚辉郝爱民
Owner 东北大学秦皇岛分校
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