A kind of preparation method of ceramic slate and ceramic slate
A slate and ceramic technology, applied in the production of ceramic materials, etc., can solve the problems of inability to meet the requirements of large-scale home decoration, drying cracked bricks, many cracked bricks in transportation, low drying qualification rate, etc., to improve the processability and internal uniformity. High performance and less stress build-up
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[0046] see figure 1 , the invention provides a kind of preparation method of ceramic slate, which comprises the following steps:
[0047]S1: Mix various raw materials uniformly according to the formula, and ball-mill to obtain slurry;
[0048] Specifically, the formula is:
[0049] 15-20 parts of potassium feldspar, 8-15 parts of albite, 15-20 parts of calcined kaolin, 12-20 parts of black mud, 8-15 parts of white mud, 15-20 parts of pyrophyllite, 1-10 parts of toughening agent ; The sum of the parts by weight of the above raw materials is 100 parts.
[0050] Among them, potassium feldspar and albite are the main fluxes, which can promote sintering, obtain finished ceramic slate with water absorption <0.1%, improve the flexural strength of ceramic slate, reduce micropores, and improve stain resistance. Wherein, the consumption of potassium feldspar is 15-20 parts, and the consumption of albite is 8-15 parts; preferably, the consumption of potassium feldspar is 17-20 parts, ...
Embodiment 1
[0090] This embodiment provides a ceramic rock slab with a size of 3600×2000×20mm 3 ; Among them, the thickness of the green layer is 19mm;
[0091] The formulation of the green layer is:
[0092] 19 parts of potassium feldspar, 12 parts of albite, 16 parts of calcined kaolin, 18 parts of black mud, 10 parts of white mud, 18 parts of pyrophyllite, 1 part of low temperature toughening agent, 6 parts of high temperature toughening agent;
[0093] Among them, the particle size of 80% of the calcined kaolin is less than 1 μm; the low temperature toughening agent is methyl cellulose, and the high temperature toughening agent is mullite whisker;
[0094] Preparation method of ceramic slate:
[0095](1) Mixing various raw materials uniformly according to the formula, and ball milling to obtain slurry;
[0096] Among them, the 250-mesh sieve residue of the slurry is 0.2%;
[0097] (2) the slurry is spray-dried, and the first powder is obtained after sieving;
[0098] (3) passing ...
Embodiment 2
[0115] This embodiment provides a large-sized ceramic rock slab with a size of 3600×1800×25mm 3 ; Among them, the thickness of the green body layer is 24.5mm;
[0116] The formulation of the green layer is:
[0117] 19 parts of potassium feldspar, 12 parts of albite, 16 parts of calcined kaolin, 18 parts of black mud, 10 parts of white mud, 18 parts of pyrophyllite, 1 part of low temperature toughening agent, 6 parts of high temperature toughening agent;
[0118] Among them, the particle size of 90% of the calcined kaolin is less than 1 μm; the low temperature toughening agent is tobermorite, and the high temperature toughening agent is talc;
[0119] Preparation method of ceramic slate:
[0120] (1) Mixing various raw materials uniformly according to the formula, and ball milling to obtain slurry;
[0121] Among them, the 250-mesh sieve residue of the slurry is 0.4%;
[0122] (2) the slurry is spray-dried, and the first powder is obtained after sieving;
[0123] (3) pass...
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