Method and equipment for preparing zirconia sizing nozzle with magnesium oxide nanopowder
A sizing nozzle and zirconia technology, which is applied in the field of zirconia sizing nozzles prepared by magnesia nanopowder, can solve the problems of poor particle shape and fluidity of the billet, high difficulty in product compression molding, and unreasonable gradation.
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Embodiment 1
[0038] combine figure 1 and 2 , the suspended state circulating granulation equipment of this embodiment includes a pressure pump 1, a feed port 2, a nozzle 3, a cyclone 4, a collector 5, a fan 6 and a mixing cylinder 7, wherein:
[0039] The cyclone 4 includes a core tube 401, an inlet 402, a cylinder 403 and a discharge port 404, the inlet 402 is located on the side of the cylinder 403, the core tube 401 communicates with the end of the cylinder 403, and the discharge port 404 is located on the side of the cylinder 403. the bottom of the body 403;
[0040] The pressure pump 1 communicates with the nozzle 3 to provide power for the material to be atomized to pass through the nozzle 3; the mixing cylinder 7 communicates with the inlet 402 of the cyclone 4, the nozzle 3 goes deep from the upper end of the mixing cylinder 7, and the feeding port 2 is set at the mixing At the bottom of the barrel 7, the screw feeder transports the raw materials from the feed port 2 to the mixin...
Embodiment 2
[0043] Step 1, preparation of mixture: raw materials include partially stabilized zirconia and monoclinic zirconia, and the chemical composition of partially stabilized zirconia is (wt%): ZrO 2 =95.02, HfO 2 =2.04, MgO=2.61, CaO=0.03, Al 2 o 3 =0.03, loss on ignition is 0.27, particle size is d 95 =1.0-5.0 μm, the chemical composition of monoclinic zirconia is (wt%): ZrO 2 +HfO 2 >98 and SiO 2 50 =1.0~2.0μm, d 95 95 = 90nm.
[0044] According to the mass ratio of partially stabilized zirconia: monoclinic zirconia micropowder = 60:40, and the mass percentage of raw materials added is 2.68% magnesium oxide nanopowder, the three raw materials are mixed, and the above materials are loaded into a polyurethane ball mill tank , use zirconia ceramic balls, and grind for 24 hours to ensure that the raw materials are fully mixed;
[0045] Step 2, the preparation of magnesia gel binding agent: preparation concentration is the MgCl of 1.8mol / L 2 Mother liquor, adding the mass per...
Embodiment 3
[0050] The difference between this example and Example 2 is that the sintering temperature in step 4 is adjusted to 1720°C, and the volume density of the ceramic-type zirconia composite sizing nozzle is 5.56g / cm 3 , The porosity of the finished product is 0.97%, the cold compressive strength is 1310Mpa, there is no bursting during use, and the service life is 40h.
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