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Custom Ceramic Coffee Mug Grouting Process - Types of Thinners |
| Ceramic Mug From:Xinxiang Ceramic Mug Manufacturers 2024-4-9 |
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Xin xiang Ceramic Mug Manufacturer, Types of diluents and selection in general, the lower the water content of the slurry mobility is worse, and the slurry injection process requires the slurry water content as low as possible and mobility is good enough, that is, the need to prepare good enough mobility thick slurry, the production of this water content as low as possible, and mobility is good enough for the thick slurry, the measures taken is to join the diluent.
Ceramic industry production is often used in the diluent is divided into three categories.
1). Inorganic electrolytes
Such as water glass, sodium carbonate, sodium phosphate, sodium hexametaphosphate and so on. This is the most commonly used class of diluents. To get the desired viscosity of the mud, and the need to add the type and amount of electrolyte and the type of clay in the mud has a close relationship. Generally, the amount of electrolyte is 0.3%-0.5% of the mass of the dry blank. Water glass has the best effect on enhancing the suspension ability of kaolin clay slurry, which not only significantly reduces its viscosity, but also in a wide range of electrolyte concentration is very low viscosity, which is conducive to production operations. For the purple wood knotty clay slurry containing organic matter, sodium carbonate has a better dilution effect than water glass. Production is often used at the same time as water glass and soda ash as a diluent to adjust the speed of pulp and the degree of softness of the body. Because of the single water glass, the blank after demolding hardening faster, inside and outside the moisture difference is small, dense and hard, easy to crack. Single soda ash (Na2CO3), after demolding, the body of the slower hardening, inside and outside the moisture difference is large, the body of the softer, or outside the hard inside soft. When using electrolyte, pay attention to its quality. Soda ash will turn into sodium bicarbonate if it gets wet, and the latter will flocculate the mud. Water glass (Na2SiO3) is a soluble silicate composed of alkali metal oxides (usually Na2O) and silica in varying proportions. Its composition with SiO2/Na2O molar ratio (called water glass modulus) to express, when its modulus is greater than 4, long-term placement will precipitate colloidal SiO2. commonly used as a diluent of water glass modulus is generally about 3.
2). Organic acid salts
Such as sodium humate, sodium tannate, sodium citrate, rosin soap. This kind of organic substances have several conditions as a diluent. Their dilution effect is relatively good. The amount of sodium humate is generally 0.25%. If exceeded, the viscosity of the mud increases again, which is similar to the dilution law of inorganic electrolytes. In addition, the dosage is too large, such as firing its organic matter is not burned clean, but also make the glaze dark. The amount of sodium tannate is generally about 0.3%-0.6%.
3). Polymerized electrolyte
Ceramic industry using this type of diluent history is much shorter than the above two types of diluent. Polymerization electrolyte is often used as a clay-free raw material slurry diluent. Commonly used gum arabic, peach gum, gelatin, carboxymethyl fiber sodium salt and other organic colloids, its dosage will make the slurry polymerization and sinking, the appropriate increase will dilute the slurry, the dosage is generally in the 0.3% or so.
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