Diffraction pattern of solid potassium silicate prepared by pyrophyllite


What is Potassium silicate?

The feasibilities of consolidated samples with different potassium silicate solutions (K6, 6, and K5, five mol/L) and different additives (sands, carbonates, and the mix) were tested. All compounds can be easily made and are feasible with homogeneous aspects and the same brown–red color, regardless of their chemical composition, due to the presence of iron in the metakaolin used. A visual inspection of the heat-treated samples shows that every formulation can withstand the heating program without severe cracking; each sample exhibits decreases in volume and total mass and a change in color from dark brown to white/light brown. This behavior was also seen in previous works. The iron present in the metakaolin M5 gives the red color. The environment of Fe is crystallized hematite. This phase disappears during heating at 1000 °C because it loses its crystallinity. The iron flows into the geopolymer viscous flow, changing its environment, thus, the color change.


Diffraction pattern of solid potassium silicate prepared by pyrophyllite

Diffraction pattern of solid potassium silicate prepared by pyrophyllite using K2CO3 in the weight ratio of 2:1, 3:1, and 4:1. Transformation of crystalline structure (Fig.2) into an amorphous occurs during the fusion reaction between pyrophyllite (crystalline) with potassium underway. The amorphous structure of potassium silicate product can increase its solubility. The yield of potassium silicate solid produced from geothermal sludge (70-80%) is lower than that from pyrophyllite (91-97%) prepared by KOH. On the other hand, the yield of potassium silicate from geothermal sludge prepared by K2CO3 (60-70%) is lower than that prepared by KOH (70-80%). The melting point of potassium carbonate is 891 °C and potassium hydroxide is 406 °C, while the melting point of silica is around 1600 to 1730 °C. The difference between the melting point of silica and potassium leads to the melting point of a mixture of both being different depending on the composition ratio of SiO2/K2O. Fig. 9 shows the effect of raw material ratio (SiO2/K2O) on melting temperature. Because potassium hydroxide has the lowest melting point, the melting point of the mixture is in the range of 800 ° C to 1100 °C. Based on the melting point of a mixture of geothermal silica and potassium in the molar ratio 3: 1 to 4: 1, the melting temperature is up to 900 °C using KOH and 1100 °C using K2CO3. As the mixture of pyrophyllite and potassium in the molar ratio 2: 1 reaches the melting temperature of 1200 °C using KOH and 1350 °C using K2CO3.


Effects of potassium-silicate, sands and carbonates concentrations on metakaolin-based geopolymers for high-temperature applications

Potassium-based geopolymers have been observed to have great thermal stability, mainly due to the crystallization of kalsilite and/or leucite at high temperature as stated by V.F.F. Sakkas et al. Successfully produced a geopolymer based on potassium silicate, and with excellent passive fire-resistant properties and low thermal conductivity. After being exposed to thermal loading with a peak temperature of 1380 °C, the K-based geopolymer specimens showed no damage or visible deformations. X-ray investigation showed the presence of leucite in these samples.Materials have to have certain properties to be called fire-resistant, such as thermal stability and mechanical resistance once exposed to high temperatures, as well as chemical stability and resistance to heat decomposition. Ceramic materials are naturally able to bear heat. Geopolymers are ceramic materials generally obtained through polycondensation reactions between an aluminosilicate source, such as either kaolinitic or metakaolin clays, and an alkaline solution that contains an alkaline-earth silicate, generally potassium or sodium. The properties of geopolymers are similar to those of common ceramics, such as chemical and thermal stability and mechanical resistance. Moreover, their formulations can be manipulated to develop characteristics and properties that are useful for different applications. Different fillers can be added to geopolymer formulations to produce inexpensive ceramics with fire-resistant properties


Price of Potassium silicate

Potassium silicate particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Potassium silicate. A large amount of large amount will be lower. The Price of Potassium silicate is on our company's official website.


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