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Improvement of zirconia ceramic microwave sintering method and saggar used by same

A zirconia ceramic and microwave sintering technology, which is applied in the field of zirconia all-ceramic dental microwave sintering for oral restoration, can solve the problems of undisclosed SiC powder, sagger material and structure that have not been reported in detail, and achieve better results Effect

Active Publication Date: 2013-12-25
锐竑(上海)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure of the use of nano-scale SiC powder and pressureless sintering at 2200 ° C, and there are no detailed reports on the material and structure of the sagger used

Method used

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  • Improvement of zirconia ceramic microwave sintering method and saggar used by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The microwave sintering method that the present invention uses is to use the household microwave oven of 1KW power to refit, just as figure 1 As shown in the microwave oven (a), an insulation base plate (b) and an insulation plate (c) are installed in front of the oven door. The insulation base plate (b) and the insulation plate (c) are made of general refractory materials, as long as they can withstand 1000 The temperature of 800°C is enough; a special sagger is set in the furnace, and the special sagger is placed on the heat-insulating bottom plate, and the special sagger is constructed by components (4), (5) and (6). Among them, part (4) is an insulating layer made of materials resistant to 1600°C, which is cylindrical, rectangular or square, and the inner layer is part (5), which is composed of materials resistant to 1800°C. Cylindrical, rectangular or square, heat-promoting materials are placed in the pores of the component (5) to form a heat-promoting layer (6). I...

Embodiment 2

[0046] Component (4) has an insulation layer made of a material resistant to 1400°C and a composite insulation layer composed of a material resistant to 1600°C, so that the temperature resistance is better, and the rest are the same as in Example 1. ZrO 2 The sintering temperature of the all-ceramic material is 1480°C, and the temperature is kept for 2 hours.

Embodiment 3

[0048] The used sagger is made up of 3 layers of insulation layers, the gap between the three layers of insulation layers when splicing is between 20-30 microns, and the rest is the same as in embodiment 1 or 2, the all-ceramic material to be sintered is placed on the silicon carbide heating material (6) above, the sintering temperature of the all-ceramic material is 1480-1530°C, and the holding time is 0.5-2 hours.

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Abstract

The invention relates to an improvement of a zirconia ceramic microwave sintering method and a saggar used by the same. The invention is characterized in that microwave energy is converted into heat energy for heating, and a silicon carbide heat-assisting layer material is utilized to heat the zirconia ceramic to the temperature at which the zirconia can absorb microwaves, so that the zirconia ceramic can reach the sintering temperature under the action of microwaves. The invention also relates to a saggar used by the microwave method, which is composed of high aluminum fiber thermal insulation layers and a silicon carbide heat-assisting layer, wherein the number of the high aluminum fiber thermal insulation layers can be two or three; and the two layers can be a 1800 DEG C thermal insulation layer and a 1600 DEG C thermal insulation layer, and the three layers can be a 1800 DEG C thermal insulation layer, a 1600 DEG C thermal insulation layer and a 1400 DEG C thermal insulation layer. The method has the characteristics of high speed and excellent energy-saving property.

Description

technical field [0001] The present invention relates to an improvement of a microwave sintering method for zirconia ceramics and a sagger for use, more precisely, the present invention relates to a method for sintering a zirconia all-ceramic tooth for dental restoration and a sagger for use in a microwave oven, which belongs to microwave sintering of ceramic materials field. Background technique [0002] In 1983, the first prototype of a dental restoration using computer-aided design / computer-aided manufacturing (CAD / CAM) technology came out in France. The application of this technology will replace the traditional process of manual production of denture (denture) bridge and crown restorations in the laboratory for several hundred years in the field of stomatology, making automatic or semi-automatic production of restorations a reality. The revolution of production technology will inevitably lead to the rapid development of material science. Bioceramics have been favored fo...

Claims

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Application Information

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IPC IPC(8): C04B35/64C04B35/26
Inventor 田万鸿王利斌王利军
Owner 锐竑(上海)新材料科技有限公司
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