Unlock instant, AI-driven research and patent intelligence for your innovation.
Powder for black zirconia sintered body, production method thereof, and sintered body thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A black zirconia, sintered body technology, applied in chemical instruments and methods, inorganic chemistry, zirconium compounds, etc., can solve problems such as reducing the amount of addition
Active Publication Date: 2008-05-07
TOSOH CORP
View PDF6 Cites 31 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, since existing colorants require excess Al 2 o 3 , cannot form a deep enough black, so in order to obtain a sufficient color tone, even if the manufacturing yield is reduced due to cracking, etc., the use of Al should be reduced. 2 o 3 amount added
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0066] Zirconia powder TZ-3YS-E manufactured by Tosoh Co., Ltd. at 96.0% by weight (except for Y with 5.35% by weight) 2 o 3 Contains 0.25% by weight of Al in addition to stabilized zirconia 2 o 3 , BET specific surface area is 6m 2 In / g), the coprecipitate obtained by adding ammonia water to the aqueous nitrate solution of Co, Zn, Fe, and Al was filtered, washed with water, and dried as a colorant using 3.5% by weight of coprecipitate, and an additional 0.5% by weight was added. Al 2 o 3 The powder is wet-mixed with a ball mill and then dried to obtain a mixed powder.
[0067] Through uniaxial molding pressure 700kg / cm 2 The obtained mixed powder was molded to obtain a composite molded body. The sintering temperature of each molded body is in the range of 1300 ° C ~ 1500 ° C, set a temperature every 50 ° C, using an electric furnace, in the atmosphere, under the condition of a heating rate of 100 ° C / hour, to reach the specified temperature, each The molded body wa...
Embodiment 2
[0072] In addition to adding 3.5 wt% of dry powder as a colorant, 1.0 wt% of commercially available Al 2 o 3 Except for the powder, it was sintered for 2 hours under the same conditions as in Example 1.
[0073] In addition, when the dry powder was separately fired at 800°C, it was confirmed that the chemical composition was (Co 0.68 Zn 0.32 )(Fe 0.70 al 0.30 ) 2 o 4 .
[0074] Table 1 shows the performance evaluation results of the obtained sintered body.
Embodiment 3
[0076] Sintering was carried out for 2 hours under the same conditions as in Example 1 except that 3.5% by weight of dry powder was added as a colorant.
[0077] In addition, when the dry powder was separately fired at 800°C, it was confirmed that the chemical composition was Co(Fe 0.50 al 0.50 ) 2 o 4 .
[0078] Table 1 shows the performance evaluation results of the obtained sintered body.
[0079] Due to the absence of Zn, the generated pores increase and the bending strength decreases, but a certain degree of bending strength, brightness, and sintering uniformity can also be maintained.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
specific surface area
aaaaa
aaaaa
Login to View More
Abstract
To solve the problem of a conventional black zirconia that a uniform sintered compact is not obtained since the density, strength and color tone of the sintered compact are changed by a sintering temperature, and color transfer and pores on the surface of the sintered compact are caused by the volatilization of coloring components. The present invention provides zirconia-containing powder comprising 2-6 weight% coloring agent, 0.05 to 6 weight% of Al 2 O 3, 5.35 to 7.10 weight% Y2O3 and zirconia, wherein, the coloring agent has a spinel structure represented by the chemical formula (Co1-xZnx)(Fe1-yAly)2o4(0 x 0.5, 0 < y 0.5) or which is a coprecipitated material containing Co, Zn, Fe, and Al and has the same spinel structure after calcinations; and the black zirconia sintered compact obtained by sintering the powder containing the zirconia at the temperature from 1300 DEG C to 1500 DEG C.
Description
technical field [0001] The present invention relates to a zirconia powder for colored zirconia sintered bodies that has no defects, has a deep black gem-like appearance, has no temperature dependence of the sintered density during sintering, does not shift in color, does not crack, and the like; As well as a black zirconia sintered body with no defects and excellent appearance and a colorant suitable for black zirconia. [0002] Black zirconia sintered body is widely used for decorative parts (watch straps, watch exterior parts, watch cases, broaches (ブロichi), tie pins, cuff buttons, handbag hardware (hardware) parts, etc.), exterior decoration Parts (mobile phones, home appliances, mobile home appliances, etc.), semiconductor parts, structural parts, etc. Background technique [0003] Conventionally, colored zirconia sintered bodies, particularly deep black (dark みのある black) zirconia sintered bodies are known. Colored zirconia sintered, for example, formed from zirconia c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More