High-purity nano aluminium oxide biological ceramic formed through starch curing and preparation method and application thereof
A nano-alumina and bio-ceramic technology, applied in the field of bio-alumina ceramics, can solve the problems of low local strength, uneven dispersion, low neck thickness, etc., and achieve high relative density of sintered body, good dispersion and uniformity, The effect of reducing production costs
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Embodiment 1
[0030] Take 33g of nano-alumina, 0.735g of nano-magnesia, 0.711g of nano-zirconia, and 0.072g of yttrium oxide, mix them, dry grind them for 3-5 hours, and sieve them after fully drying to obtain the mixed material for use. Take 15ml of distilled water, add 0.0165g (0.05wt%) of low-viscosity polyvinyl alcohol and 0.495g (1.5wt%) of ammonium citrate, and ultrasonically dissolve it completely. Next, 0.165 g (0.5 wt%) of cornstarch was added to the solution, and the solution was placed in a water bath at 80° C. for 10-15 min while being stirred, and its pH value was adjusted to 10 with NaOH. Add the above-mentioned mixture into the solution, and carry out a cold water bath to the slurry while adding (operating device such as figure 1 Shown), continue to stir about 1h. After the stirring was completed, the solution was subjected to ultrasonic vacuuming and defoaming treatment for 8 min (operating device such as figure 2 shown). Slowly pour the mixed slurry after defoaming into...
Embodiment 2
[0033] Take 33g of nano-alumina, 0.735g of nano-magnesia, 0.711g of nano-zirconia, and 0.072g of yttrium oxide, mix them, dry grind them for 3-5 hours, and sieve them after fully drying to obtain the mixed material for use. Take 15ml of distilled water, add 0.0165g (0.05wt%) of low-viscosity polyvinyl alcohol and 0.495g (1.5wt%) of ammonium citrate, and ultrasonically dissolve it completely. Next, 0.25 g (0.75 wt %) of cornstarch was added to the solution, and the solution was placed in a water bath at 80° C. for 10-15 min while being stirred, and its pH value was adjusted to 10 with NaOH. Above-mentioned mixture is added in the solution, slurry is carried out cold water bath (operating device such as figure 1 Shown), continue to stir about 1h. After the stirring was completed, the solution was subjected to ultrasonic vacuuming and defoaming treatment for 8 min (operating device such as figure 2 shown). Slowly pour the mixed slurry after defoaming into a non-porous mold co...
Embodiment 3
[0036] Take 33g of nano-alumina, 0.735g of nano-magnesia, 0.711g of nano-zirconia, and 0.072g of yttrium oxide, mix them, dry grind them for 3-5 hours, and sieve them after fully drying to obtain the mixed material for use. Take 15ml of distilled water, add 0.0165g (0.05wt%) of low-viscosity polyvinyl alcohol and 0.495g (1.5wt%) of ammonium citrate, and ultrasonically dissolve it completely. Next, 0.33 g (1.0 wt%) of cornstarch was added to the solution, and the solution was placed in a water bath at 80° C. for 10-15 min while being stirred, and its pH value was adjusted to 10 with NaOH. Add the above-mentioned mixture into the solution, and carry out a cold water bath to the slurry while adding (operating device such as figure 1 Shown), continue to stir about 1h. After the stirring was completed, the solution was subjected to ultrasonic vacuuming and defoaming treatment for 8 min (operating device such as figure 2 shown). Slowly pour the mixed slurry after defoaming into ...
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Abstract
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