CN112920622A - Camel colorant, camel zirconia ceramic and preparation method and application thereof - Google Patents
Camel colorant, camel zirconia ceramic and preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of ceramic materials, and particularly relates to a camel colorant, a camel zirconia ceramic, and a preparation method and application thereof. The camel-color colorant provided by the invention comprises praseodymium oxide and cobalt oxide, wherein the mass ratio of the praseodymium oxide to the cobalt oxide is 0.5-5: 0.5-5. In the present invention, the zirconia ceramic can exhibit a camel color by mixing praseodymium oxide and cobalt oxide at a specific mass ratio as a colorant. The invention provides a camel zirconia ceramic which comprises the following preparation raw materials in parts by weight: 900-970 parts of zirconium oxide, 30-100 parts of yttrium oxide, 0.5-5 parts of aluminum oxide and 1-10 parts of camel colorant. The invention makes zirconia ceramics show camel color under the action of the camel colorant. The camel zirconia ceramic provided by the invention has excellent mechanical property and light transmittance.
Description
Technical Field
The invention belongs to the technical field of ceramic materials, and particularly relates to a camel colorant, a camel zirconia ceramic, and a preparation method and application thereof.
Background
The zirconia ceramic material has excellent mechanical property, corrosion resistance, biocompatibility, higher thermal expansion coefficient, low thermal conductivity and high chemical stability, so that the zirconia ceramic material is widely applied to the fields of dental materials, human bones, ceramic cutters, grinding media, thermal barrier coating materials and the like. With the expanding market of the application field of the zirconia ceramic material, more requirements such as beauty and the like are put on the zirconia ceramic. However, most of the existing zirconia ceramics are white, and the requirement of the market for the color of the zirconia ceramics is difficult to meet.
Disclosure of Invention
In view of the above, the invention provides a camel colorant, a camel zirconia ceramic, and a preparation method and application thereof. The zirconia ceramics provided by the invention show a camel color, and the variety of the colored ceramics is increased.
In order to solve the technical problem, the invention provides a camel colorant which comprises praseodymium oxide and cobalt oxide, wherein the mass ratio of the praseodymium oxide to the cobalt oxide is 0.5-5: 0.5-5.
The invention also provides a camel zirconia ceramic, which comprises the following preparation raw materials in parts by weight:
the camel colorant is the camel colorant in the technical scheme.
Preferably, the preparation method comprises the following preparation raw materials in parts by mass:
the invention also provides a preparation method of the camel zirconia ceramic in the technical scheme, which comprises the following steps:
grinding zirconium oxide, yttrium oxide, aluminum oxide and camel colorant to obtain zirconium oxide ceramic powder;
molding the zirconia ceramic powder to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank to obtain the camel zirconia ceramic.
Preferably, the particle size of the zirconia ceramic powder is 1-100 nm.
Preferably, the grinding comprises: ball milling and sand milling are carried out in sequence.
Preferably, the ball milling comprises: carrying out ball milling of a roller mill and ball milling of a stirring ball mill in sequence;
the rotation speed of the ball milling of the roller mill is 50-90 r/min, the time is 10-20 h, the ball-to-material ratio is (2-10): 0.5-1, and the diameter of the zirconia balls for the ball milling of the roller mill is 10-45 mm;
the ball milling speed of the stirring ball mill is 100-200 r/min, the time is 2-6 h, the ball-material ratio is (2-10): 0.5-1, and the diameter of the zirconia balls for ball milling of the stirring ball mill is 5-10 mm.
Preferably, the rotational speed of sanding is 2000-2500 r/min, the time is 2-6 h, the ball-to-material ratio is (2-10): 0.5-1, and the diameter of zirconia ball for sanding is 0.1-0.8 mm.
Preferably, the forming comprises: performing and cold isostatic pressing in sequence;
the preforming pressure is 5-20 MPa, and the preforming time is 0.5-1 min;
the pressure of the cold isostatic pressing is 100-300 MPa, and the time is 20-40 min.
Preferably, the roasting temperature is 1300-1600 ℃, and the roasting time is 2-10 h.
The invention provides a camel-color colorant which comprises praseodymium oxide and cobalt oxide, wherein the mass ratio of the praseodymium oxide to the cobalt oxide is 0.5-5: 0.5-5. In the present invention, the zirconium oxide ceramic can be made to exhibit a camel color by mixing praseodymium oxide and cobalt oxide at a specific mass ratio as a colorant.
The invention also provides a camel zirconia ceramic, which comprises the following preparation raw materials in parts by weight: 900-970 parts of zirconium oxide, 30-100 parts of yttrium oxide, 0.5-5 parts of aluminum oxide and 1-10 parts of camel colorant. The invention makes zirconia ceramics show camel color under the action of the camel colorant.
The invention also provides a preparation method of the camel zirconia ceramic in the technical scheme, which comprises the following steps: grinding zirconium oxide, yttrium oxide, aluminum oxide and camel colorant to obtain zirconium oxide ceramic powder; molding the zirconia ceramic powder to obtain a zirconia ceramic blank; and roasting the zirconia ceramic blank to obtain the camel zirconia ceramic. The invention directly grinds the raw materials, then forms and roasts the raw materials, avoids the introduction of acid radical ions in the coprecipitation process, has higher production efficiency, is safe and has no pollution.
Drawings
FIG. 1 is a pictorial representation of a camel zirconia ceramic prepared in example 6;
FIG. 2 is an XRD spectrum of a camel zirconia ceramic prepared in example 6.
Detailed Description
The invention provides a camel-color colorant which comprises praseodymium oxide and cobalt oxide, wherein the mass ratio of the praseodymium oxide to the cobalt oxide is 0.5-5: 0.5-5, preferably 0.8-1.2: 1, and more preferably 1: 1.
In the present invention, all the raw materials are conventional commercially available products unless otherwise specified.
In the present invention, the preparation method of the camel colorant preferably comprises the steps of: and mixing praseodymium oxide and cobalt oxide to obtain the camel colorant. The mixing is not particularly limited in the present invention as long as it can be mixed uniformly. The invention mixes praseodymium oxide and cobalt oxide with specific proportion to obtain the camel colorant which can make zirconia ceramics show camel.
The invention also provides a camel zirconia ceramic, which comprises the following preparation raw materials in parts by weight:
the camel colorant is the camel colorant in the technical scheme.
In the invention, the raw material for preparing the camel zirconia ceramic comprises, by mass, 900-970 parts of zirconia, preferably 920-950 parts, and more preferably 930-940 parts.
In the invention, the raw material for preparing the camel zirconia ceramic comprises, by mass, 30-100 parts of yttrium oxide, preferably 50-80 parts, and more preferably 60-70 parts. In the present invention, the yttria can improve the strength and hardness of the zirconia ceramic.
In the invention, the raw material for preparing the camel zirconia ceramics comprises 0.5-5 parts of alumina, preferably 1-3 parts, and more preferably 2-2.5 parts by mass. In the invention, the alumina can effectively reduce the sintering temperature of the zirconia ceramic, refine the grain size of the ceramic and achieve the purpose of improving the light transmission performance and the mechanical performance of the zirconia ceramic.
In the invention, the raw materials for preparing the camel zirconia ceramics comprise 1-10 parts by mass of camel colorant, more preferably 2-6 parts by mass, and still more preferably 4-5 parts by mass. In the invention, the camel-color colorant is mixed with other preparation raw materials and then roasted to enable the zirconia ceramics to show a camel color, increase the types of the colored zirconia ceramics and improve the beauty of the zirconia ceramics.
In the invention, the raw material for preparing the camel zirconia ceramic preferably comprises a dispersant, the dispersant preferably comprises one or more of ammonium polyacrylate, sodium tripolyphosphate, sodium hexametaphosphate, ammonium polymethacrylate and polyethylene glycol, and more preferably comprises ammonium polyacrylate, sodium tripolyphosphate, sodium hexametaphosphate or polyethylene glycol. In the present invention, when the dispersant includes two or more of the above-mentioned specific substances, the ratio of the specific substances in the present invention is not particularly limited, and any ratio may be adopted. In the invention, the amount of the dispersant is preferably 0.2-1%, more preferably 0.4-0.8% of the total mass of the zirconia, yttria, alumina and camel colorant. In the invention, the dispersant can uniformly disperse the camel colorant in the raw material, and improve the color uniformity of the zirconia ceramic.
The invention also provides a preparation method of the camel zirconia ceramic in the technical scheme, which comprises the following steps:
grinding zirconium oxide, yttrium oxide, aluminum oxide and camel colorant to obtain zirconium oxide ceramic powder;
molding the zirconia ceramic powder to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank to obtain the camel zirconia ceramic.
And grinding the zirconia, the yttria, the alumina and the camel colorant to obtain zirconia ceramic powder. The present invention preferably comprises, prior to grinding: zirconia, yttria, alumina, a camel colorant, and a dispersant are mixed. In the invention, the dispersant can promote the uniform dispersion of the camel colorant in the zirconia ceramic powder. In the present invention, the particle size of the zirconia ceramic powder is preferably 1 to 100nm, and more preferably 2 to 50 nm.
In the present invention, the grinding preferably comprises: ball milling and sand milling are carried out in sequence. In the invention, the ball milling is preferably wet ball milling, the solvent for the wet ball milling is preferably deionized water, and the solid content of the slurry for the wet ball milling is preferably 45-75%, and more preferably 50-65%. In the present invention, the ball milling preferably comprises: carrying out ball milling of a roller mill and ball milling of a stirring ball mill in sequence; the rotation speed of the ball mill of the roller mill is preferably 50-90 r/min, and more preferably 60-80 r/min; the time is preferably 10-20 h, and more preferably 12-16 h; the preferred ratio of the ball material to the material is (2-10): (0.5-1), and the more preferred ratio is (3-8): 0.5-1; the diameter of the zirconia balls for ball milling of the roller mill is preferably 10-45 mm, and in the embodiment of the invention, the diameter of the zirconia balls for ball milling of the roller mill is specifically 10-15 mm, 15-20 mm, 25-30 mm, 35-40 mm or 40-45 mm. In the invention, the rotation speed of the stirring ball mill is preferably 100-200 r/min, and more preferably 140-180 r/min; the time is preferably 2-6 h, and more preferably 3-5 h; the preferred ratio of the ball material to the material is (2-10): (0.5-1), and the more preferred ratio is (3-8): 0.5-1; the diameter of the zirconia balls for ball milling of the stirred ball mill is preferably 5-10 mm, and in the embodiment of the invention, the diameter of the zirconia balls for ball milling of the stirred ball mill is specifically 5-6 mm, 6-7 mm, 7-8 mm, 8-9 mm or 9-10 mm. In the present invention, the ball milling enables the raw materials to be uniformly dispersed.
In the invention, the sanding is preferably wet sanding, the solvent for the wet sanding is preferably deionized water, and the solid content of the slurry for the wet sanding is preferably 35-55%, more preferably 40-50%, and even more preferably 45-48%. In the invention, the rotational speed of the sanding is preferably 2000-2500 r/min, and more preferably 220-2400 r/min; the time is preferably 2-6 h, and more preferably 3-5 h; the preferred ratio of the ball material to the material is (2-10): (0.5-1), and the more preferred ratio is (3-8): 0.5-1; the diameter of the zirconia ball for sanding is preferably 0.1-0.8 mm; in the embodiment of the invention, the diameter of the zirconia ball for sanding is specifically 0.1-0.3 mm, 0.3-0.4 mm, 0.4-0.5 mm, 0.5-0.6 mm or 0.6-0.8 mm. According to the invention, the grain diameter of the zirconia ceramic powder can reach 1-100 nm by sanding, and the mechanical property of the camel zirconia ceramic can be improved by limiting the grain diameter of the zirconia ceramic powder within the range.
In the present invention, the sanding preferably further comprises: and drying the sanded product to obtain the zirconia ceramic powder. In the invention, the drying preferably comprises one or more of spray drying, electric heating oven drying, evaporator drying, centrifugal dehydration and filter pressing dehydration; more preferably spray drying or electric oven drying. In the present invention, when the drying includes centrifugal dehydration and/or filter-press dehydration, it preferably includes the steps of: carrying out centrifugal dehydration and/or filter pressing dehydration, and then carrying out spray drying, electric heating oven drying or evaporator drying. In the invention, the materialization frequency of the spray drying is preferably 43-47 Hz, and more preferably 45 Hz; the air inlet temperature is preferably 238-242 ℃, and more preferably 240 ℃; the peak temperature is preferably 88-92 ℃, and more preferably 90 ℃; the time is preferably 2 to 10 hours, and more preferably 3 to 9 hours. In the invention, the drying temperature of the electric heating oven is preferably 75-95 ℃, and more preferably 80-90 ℃; the time is preferably 5 to 12 hours, and more preferably 8 to 10 hours.
After the zirconia ceramic powder is obtained, the zirconia ceramic powder is molded to obtain a zirconia ceramic blank. In the present invention, the molding preferably includes: performing and cold isostatic pressing in sequence; the preforming pressure is preferably 5-20 MPa, more preferably 8-15 MPa, and further preferably 10-13 MPa; the time is preferably 0.5 to 1min, more preferably 0.6 to 0.9 min. The preforming device is not particularly limited in the present invention as long as the above conditions are satisfied. In an embodiment of the invention, the preforming device is a bidirectional ceramic hydraulic press. In the invention, the pressure of the cold isostatic pressing is preferably 100-300 MPa, more preferably 150-250 MPa, and even more preferably 200-210 MPa; the time is preferably 20 to 40min, and more preferably 25 to 38 min. The apparatus for cold isostatic pressing is not particularly limited in the present invention, as long as the above conditions are satisfied.
The method combines the pre-forming and the cold isostatic pressing, is favorable for obtaining the zirconia ceramic blank with high density, and is favorable for improving the hardness and transmittance of the camel zirconia ceramic.
After the zirconia ceramic body is obtained, the invention bakes the zirconia ceramic body to obtain the camel zirconia ceramic. In the invention, the roasting temperature is preferably 1300-1600 ℃, more preferably 1350-1450 ℃, and further preferably 1400-1410 ℃; the time is preferably 2 to 10 hours, more preferably 4 to 8 hours, and further preferably 6 to 7 hours. The temperature and time for roasting are limited in the range, so that the hardness and the toughness of the camel zirconia ceramic are improved.
The preparation method provided by the invention is green, pollution-free, simple and controllable, and the production period is short, so that the industrial production is facilitated.
In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
Praseodymium oxide and zirconium oxide are mixed according to the mass ratio of 1:1 to obtain the camel colorant.
Example 2
Mixing 900g of zirconia, 100g of yttria, 0.5g of alumina, 0.5g of praseodymium oxide, 0.5g of cobalt oxide, 2g of ammonium polymethacrylate and distilled water to obtain slurry with the solid content of 45%, and mixing the slurry at a rotating speed of 50r/min and a ball-to-material ratio of 2: 0.5, performing ball milling for 10 hours by using a roller mill under the condition that zirconia balls with the diameter of 10mm are used as grinding balls; when the rotating speed is 200r/min and the ball-material ratio is 2: 0.5, performing ball milling for 2 hours by using a stirring ball mill under the condition that zirconia balls with the diameter of 5mm are used as grinding balls;
after the solid content of the slurry after ball milling is adjusted to be 35%, the slurry is mixed at a rotating speed of 2500r/min and a ball-to-material ratio of 2: 0.5, sanding for 6 hours under the condition that zirconia balls with the diameter of 0.6mm are used as grinding balls;
carrying out spray drying on the sanded slurry for 2h under the conditions that the atomization frequency is 45Hz, the air inlet temperature is 240 ℃ and the air outlet temperature is 90 ℃ to obtain zirconia ceramic powder with the particle size of 20 nm;
transferring the zirconia ceramic powder to a bidirectional ceramic hydraulic press, preforming at 5MPa for 0.5min, and carrying out cold isostatic pressing on a preformed product at 100MPa for 20min to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank at 1300 ℃ for 10h to obtain the camel zirconia ceramic.
Example 3
Mixing 920g of zirconia, 80g of yttria, 1g of alumina, 1g of praseodymium oxide, 1g of cobalt oxide, 4g of ammonium polyacrylate and distilled water to obtain slurry with the solid content of 50%, and mixing the slurry at a rotating speed of 60r/min and a ball-to-material ratio of 4: 0.7, performing ball milling for 12 hours by using a roller mill under the condition that zirconia balls with the diameter of 15mm are used as grinding balls; when the rotating speed is 180r/min and the ball-material ratio is 4: 0.7, performing ball milling for 3 hours by using a stirring ball mill under the condition that zirconia balls with the diameter of 6-7 mm are used as grinding balls;
after the solid content of the slurry after ball milling is adjusted to be 40%, the slurry is mixed at a rotating speed of 2400r/min and a ball-to-material ratio of 4: 0.7, sanding for 5 hours under the condition that zirconia balls with the diameter of 0.5mm are used as grinding balls;
transferring the sanded slurry into an electric heating oven, and drying at 90 ℃ for 12h to obtain zirconia ceramic powder with the particle size of 7 nm;
transferring the zirconia ceramic powder to a bidirectional ceramic hydraulic press, preforming for 0.6min at 8MPa, and carrying out cold isostatic pressing on a preformed product at 150MPa for 25min to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank at 1350 ℃ for 8h to obtain the camel zirconia ceramic.
Example 4
940g of zirconia, 60g of yttria, 2g of alumina, 2g of praseodymium oxide, 2g of cobalt oxide, 6g of sodium tripolyphosphate and distilled water are mixed to obtain slurry with the solid content of 55%, and the slurry is prepared by mixing the following components in a ball-material ratio of 5: 0.8, performing ball milling for 14 hours by using a roller mill under the condition that zirconia balls with the diameter of 25mm are used as grinding balls; when the rotating speed is 160r/min and the ball-material ratio is 5: 0.8, performing ball milling for 4 hours by using a stirring ball mill under the condition that zirconia balls with the diameter of 7mm are used as grinding balls;
after the solid content of the slurry after ball milling is adjusted to be 45%, the slurry is mixed at a rotation speed of 2300r/min and a ball-to-material ratio of 5: 0.8, sanding for 4 hours under the condition that zirconia balls with the diameter of 0.4mm are used as grinding balls;
transferring the sanded slurry into an evaporator, and drying at 80 ℃ for 8h to obtain zirconia ceramic powder with the particle size of 10 nm;
transferring the zirconia ceramic powder to a bidirectional ceramic hydraulic press, preforming at 10MPa for 0.7min, and carrying out cold isostatic pressing on a preformed product at 200MPa for 30min to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank at 1400 ℃ for 6h to obtain the camel zirconia ceramic.
Example 5
Mixing 950g of zirconia, 500g of yttria, 3g of alumina, 3g of praseodymium oxide, 3g of cobalt oxide, 8g of sodium hexametaphosphate and distilled water to obtain slurry with the solid content of 65%, and mixing the slurry at a rotation speed of 80r/min and a ball-to-material ratio of 8: 0.9, performing ball milling for 16 hours by using a roller mill under the condition that zirconia balls with the diameter of 35mm are used as grinding balls; when the rotating speed is 140r/min and the ball-material ratio is 8: 0.9, taking zirconia balls with the diameter of 8mm as grinding balls, and carrying out ball milling for 5 hours by using a stirring ball mill;
after the solid content of the slurry after ball milling is adjusted to be 50%, the rotating speed is 2200r/min, the ball-to-material ratio is 8: 0.9, taking zirconia balls with the diameter of 0.3mm as grinding balls, and sanding for 3 hours;
centrifugally dewatering the sanded slurry, transferring the solid obtained by centrifugation into an electrothermal oven, and drying at 90 ℃ for 5 hours to obtain zirconia ceramic powder with the particle size of 4 nm;
transferring the zirconia ceramic powder to a bidirectional ceramic hydraulic press, preforming for 0.9min at 15MPa, and carrying out cold isostatic pressing on a preformed product at 250MPa for 35min to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic body at 1450 ℃ for 4h to obtain the camel zirconia ceramic.
Example 6
Mixing 970g of zirconium oxide, 30g of yttrium oxide, 5g of aluminum oxide, 5g of praseodymium oxide, 5g of cobalt oxide, 10g of polyethylene glycol and distilled water to obtain slurry with the solid content of 75%, and performing ball milling for 20 hours by using a roller mill under the conditions that the rotating speed is 90r/min, the ball-to-material ratio is 10:1 and zirconium oxide balls with the diameter of 40mm are used as grinding balls; performing ball milling for 6 hours by using a stirring ball mill under the conditions that the rotating speed is 100r/min, the ball-to-material ratio is 10:1 and zirconia balls with the diameter of 9mm are used as grinding balls;
after the solid content of the slurry after ball milling is adjusted to be 55 percent, sanding is carried out for 2 hours under the conditions that the rotating speed is 2000r/min, the ball-to-material ratio is 10:1 and zirconia balls with the diameter of 0.1mm are used as grinding balls;
filter-pressing and dehydrating the sanded slurry, transferring the slurry into an electric heating oven, and drying the slurry for 5 hours at 90 ℃ to obtain zirconia ceramic powder with the particle size of 2 nm;
transferring the zirconia ceramic powder to a bidirectional ceramic hydraulic press, preforming for 1min at 20MPa, and carrying out cold isostatic pressing on a preformed product for 40min at 300MPa to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank at 1600 ℃ for 2h to obtain the camel zirconia ceramic.
FIG. 1 is a schematic diagram of a prepared camel zirconia ceramic, and it can be seen from FIG. 1 that the zirconia ceramic provided by the invention shows a camel color.
XRD detection is carried out on the camel zirconia ceramic obtained in example 6, and an XRD spectrum is shown in figure 2. As can be seen from FIG. 2, the phase structure of the camel zirconia ceramic provided by the present invention is a single tetragonal phase structure.
The densities of the camel zirconia ceramics prepared in examples 2 to 6 were measured by a pycnometer according to the archimedes principle, and the results are shown in table 1.
The transmittance of the camel zirconia ceramics prepared in examples 2 to 6 was measured by the integrating sphere method, and the results are shown in table 1.
The hardness of the camel zirconia ceramics prepared in examples 2 to 6 was measured by a full-automatic vickers hardness tester, and the results are shown in table 1.
The toughness of the camel zirconia ceramics prepared in examples 2 to 6 was measured by a full-automatic vickers hardness tester, and the results are shown in table 1.
The three-point bending strength of the camel zirconia ceramics prepared in examples 2 to 6 was measured by a strength meter, and the results are shown in table 1.
TABLE 1 physical Properties and light transmittance of the camel zirconia ceramics prepared in examples 2 to 6
As can be seen from the data in Table 1, the decolored zirconia ceramic prepared by the invention has higher density, hardness and toughness, three-point bending strength and higher light transmittance, and the density is 6.05-6.09 g/cm3The hardness was 13.82 to 15.36Gpa, and the toughness of 9.01 to 10.28MPa m1/2The three-point bending strength is 1199-1206 MPa, and the light transmittance is 40-50. The camel zirconia ceramic provided by the invention has excellent mechanical property and light transmittance.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (10)
1. A camel-back colorant comprises praseodymium oxide and cobalt oxide, wherein the mass ratio of the praseodymium oxide to the cobalt oxide is 0.5-5: 0.5-5.
2. The camel zirconia ceramic comprises the following preparation raw materials in parts by weight:
the camel colorant is the camel colorant of claim 1.
3. The camel zirconia ceramic of claim 2, which is characterized by comprising the following preparation raw materials in parts by mass:
4. a method of preparing the camel zirconia ceramic of claim 2 or 3, comprising the steps of:
grinding zirconium oxide, yttrium oxide, aluminum oxide and camel colorant to obtain zirconium oxide ceramic powder;
molding the zirconia ceramic powder to obtain a zirconia ceramic blank;
and roasting the zirconia ceramic blank to obtain the camel zirconia ceramic.
5. The preparation method according to claim 4, wherein the zirconia ceramic powder has a particle size of 1 to 100 nm.
6. The method according to claim 4 or 5, wherein the grinding comprises: ball milling and sand milling are carried out in sequence.
7. The method of claim 6, wherein the ball milling comprises: carrying out ball milling of a roller mill and ball milling of a stirring ball mill in sequence;
the rotation speed of the ball milling of the roller mill is 50-90 r/min, the time is 10-20 h, the ball-to-material ratio is (2-10): 0.5-1, and the diameter of the zirconia balls for the ball milling of the roller mill is 10-45 mm;
the ball milling speed of the stirring ball mill is 100-200 r/min, the time is 2-6 h, the ball-material ratio is (2-10): 0.5-1, and the diameter of the zirconia balls for ball milling of the stirring ball mill is 5-10 mm.
8. The preparation method of the zirconia ball for sanding as set forth in claim 6, wherein the rotational speed of the sanding is 2000-2500 r/min, the time is 2-6 h, the ball-to-material ratio is (2-10): 0.5-1, and the diameter of the zirconia ball for sanding is 0.1-0.8 mm.
9. The production method according to claim 4, wherein the molding includes: performing and cold isostatic pressing in sequence;
the preforming pressure is 5-20 MPa, and the preforming time is 0.5-1 min;
the pressure of the cold isostatic pressing is 100-300 MPa, and the time is 20-40 min.
10. The preparation method according to claim 4, wherein the roasting temperature is 1300-1600 ℃ and the roasting time is 2-10 h.
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