A kind of preparation method of toughened alumina ceramics
An alumina ceramic and toughening technology is applied in the field of preparation of toughened alumina ceramics to achieve the effects of reducing production costs, promoting coagulation, and improving induction effects.
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Embodiment 1
[0046] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:
[0047] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 3, let it stand for 1 hour, collect the mixed filtrate after filtering and washing;
[0048] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;
[0049] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;
[0050] Step 4, adding nano-aluminum powder into the suspension, aeration and reflux reaction for 2 hours, adding a curing agent after the reaction to form a mixed suspension;
[0051] Step 5, putting the mixed suspension into a vacuum distillation device for vacuum distillation for 2 ho...
Embodiment 2
[0062] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:
[0063] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 5, let it stand for 3 hours, and collect the mixed filtrate after filtering and washing;
[0064] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;
[0065] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;
[0066] Step 4, adding nano-aluminum powder into the suspension, aeration and reflux reaction for 4 hours, adding a curing agent after the reaction to form a mixed suspension;
[0067] Step 5, put the mixed suspension into a vacuum distillation device for vacuum distillation for 4 h...
Embodiment 3
[0078] A method for preparing toughened alumina ceramics, characterized in that: the preparation steps are as follows:
[0079] Step 1, put the sludge from the aluminum profile factory into the reaction kettle, slowly stir and add hydrochloric acid dropwise until the pH is 4, let it stand for 2 hours, and collect the mixed filtrate after filtering and washing;
[0080] Step 2, passing ammonia gas into the mixed filtrate, stirring evenly until no flocculation precipitate occurs, and obtaining the precipitated mixture after suction filtration;
[0081] Step 3, adding polyvinylpyrrolidone to the aqueous ethanol solution, and then slowly adding the precipitation mixture to obtain a stable suspension;
[0082] Step 4, adding nano-aluminum powder to the suspension, aeration and reflux reaction for 3 hours, adding a curing agent after the reaction to form a mixed suspension;
[0083] Step 5, put the mixed suspension into a vacuum distillation device for vacuum distillation for 3 hou...
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