Quartz denture crucible coating with characteristics of no steel sticking and peeling resistance, and preparation method thereof
A crucible coating and anti-flaking technology, which is applied to crucible furnaces, lighting and heating equipment, furnace types, etc., can solve the problems of reduced service life of quartz denture crucibles, impact on denture casting quality, oxide inclusions, etc., and achieve good adhesion , Inhibition of erosion and peeling, combined with the effect of no cracks
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[0026] A kind of non-stick steel, anti-stripping quartz denture crucible coating, its preparation method comprises the following steps:
[0027] (1) Raw material selection and ratio: Partial yttrium oxide stabilized zirconia (PYD-AP) is used as raw material, silica fume is used as additive, deionized water is added, and binders are organosilane, silicic acid, polyol, polyvinyl alcohol and acrylic acid One of the esters; preferably, the ratio of deionized water to powder is 6:4, the amount of silica fume added is 0-5wt.%, excluding 0, and the binder is 0.5wt.% of polyvinyl alcohol (viscosity The binder is not limited to polyvinyl alcohol, but can also be selected from organosilane, silicic acid, polyol, acrylate), and the particle size of PYD-AP is 15-90μm, silica fume SiO 2 Content ≥ 92%, particle size is nanoscale;
[0028] (2) Mixing: uniformly mix the raw materials to form a mixed slurry; preferably, use the XQM-2 planetary ball mill to mix the raw materials and additives,...
Embodiment 1
[0034] Preparation method of non-stick steel, anti-stripping quartz denture crucible coating:
[0035] Step 1, using partial yttria-stabilized zirconia (PYD-AP) as raw material, adding deionized water to raw material ratio of 6:4, 1wt.% silica fume, and selecting polyvinyl alcohol as the binder to add 0.5wt. %.
[0036] Step 2: Put the powder and deionized water in a ball mill, mix and ball mill for 6 hours, then mix the slurry and binder, and mix evenly with a magnetic stirrer.
[0037] Step 3: Coat the uniform slurry obtained above on the inner wall of the denture crucible by the slurry-hanging method, and place it in a ventilated and dry place for 24 hours to form a coating.
[0038] Step 4: Place the coated denture crucible in a constant-temperature drying oven at a drying temperature of 80° C. and a drying time of 12 hours.
[0039] Step 5, put the dried denture crucible with coating in a box-type resistance furnace for sintering, the heating rate is 3°C / min, the temper...
Embodiment 2
[0042] Preparation method of non-stick steel, anti-stripping quartz denture crucible coating:
[0043] Step 1: Use PYD-AP as raw material, add deionized water to raw material ratio of 6:4, 1.5wt.% silica fume, and choose polyvinyl alcohol as the binder to add 0.5wt.%.
[0044] Step 2: Put the raw materials and additives in a ball mill for mixing and ball milling for 6 hours, then mix the slurry and binder, and mix evenly with a magnetic stirrer.
[0045] Step 3: Coating the uniform slurry obtained above on the inner wall of the denture crucible by using a grouting method, and placing it in a ventilated and dry place for 24 hours to form a coating.
[0046] Step 4: Place the coated denture crucible in a constant temperature drying oven at a drying temperature of 100° C. and a drying time of 18 hours.
[0047] Step 5, the dried denture crucible formed with the coating is placed in a box-type resistance furnace for sintering at 4°C / min at a temperature of 1350°C for 0.5h.
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