A kind of sintering method glass ceramic colorant
A glass ceramic and colorant technology, which is applied in glass molding, glass manufacturing equipment, dental preparations, etc., can solve the problems of decreased mechanical properties, increased production costs, fuel consumption, etc., and achieves excellent mechanical properties.
Active Publication Date: 2022-06-17
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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Problems solved by technology
However, this method requires the compound use of a large number of colorants, some of which will lead to a decrease in the mechanical properties of ceramics
In response to this defect, at present, the main method is to adjust the formula of ceramic powder and increase the sintering temperature to above 1500°C to compensate for the defect of mechanical property degradation caused by colorants.
However, high temperature sintering will inevitably lead to a large amount of fuel consumption and increase production costs
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] Preparation of Colorant 1
[0023] Weigh 0.12 moles of Er(NO 3 ) 3 , 0.04 mol Pr(NO 3 ) 3 , 0.07 mol Al (NO 3 ) 3 , 0.06 mol Fe(NO 3 ) 3 and 0.6mol EDTA, add it to 1L ethanol solvent, stir well. Then, a small amount of formic acid was added thereto so that the concentration of formic acid was 3 wt %, and a colorant 1 was obtained.
Embodiment 2
[0025] Preparation of Colorant 2
[0026] Colorant 2 was prepared in the same manner as Example 1, except that methanol was used as the solvent.
Embodiment 3
[0028] Preparation of Colorant 3
[0029] Colorant 3 was prepared in the same manner as Example 1, except that 0.27 moles of Er(NO 3 ) 3 , 0.02 mol Pr(NO 3 ) 3 and 0.01 mol Fe(NO 3 ) 3 .
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The invention discloses a sintered glass ceramic colorant, which includes a colorant and a solvent; the colorant is composed of soluble salts of Er, Pr, Al and Fe(III), and Er 3+ 、Pr 3+ 、Al 3+ and Fe 3+ The molar ratio is (1-3.9): (0.2-0.6): (0.3-1.1): (0.1-0.7); The solvent is selected from water or alcohol or a mixture thereof. The dental prosthesis prepared by using the sintered glass-ceramic colorant of the invention has good hardness and an appearance close to natural teeth.
Description
technical field [0001] The present invention relates to a colorant for ceramic materials. In particular, it relates to a colorant for a ceramic material for dental restorations, and a dental restoration having a color close to natural teeth. Background technique [0002] At room temperature, SiO 2 -Li 2 O-ZrO 2 Base glass ceramics have excellent biosafety, abrasion resistance and chemical resistance, making them ideal ceramic materials for dental restorations. Color and light transmittance are important indicators that affect the quality of restorations. Uncolored SiO 2 -Li 2 O-ZrO 2 Although the base ceramic can simulate the natural tooth color easily, it cannot meet the clinical requirements for the color of the restoration. In response to this problem, a method of applying a small amount of veneer porcelain to adjust the color of the crown after coloring the ceramic is widely used. This method can effectively reduce the amount of clinical tooth preparation and pr...
Claims
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IPC IPC(8): C03C1/04C03C10/00C03C4/00C03B19/06A61K6/818A61K6/802A61K6/833A61K6/78A61K6/60
CPCC03C1/04C03C10/00C03C4/0021C03B19/06A61K6/818A61K6/802A61K6/833A61K6/78A61K6/60
Inventor 韩成玮宋国轶孟雪李佳玲
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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