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 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. If you are looking for high quality, high purity and cost-effective Potassium silicate, or if you require the latest price of Potassium silicate, please feel free to email contact mis-asia.

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