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  • 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 i 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 Provide ventilation for containers. Keep the container tightly sealed. Keep away from food and beverages. Appropriate Engineering controls: Emergency eye wash fountains and safety showers should be available near use/handling. Zinc nitrate is a colorless crystalline solid. Noncombustible, but accelerates the burning of combustible materials. ICSC 1206 - ZINC NITRATE. Not combustible but enhances the combustion of other substances. Many reactions may cause fire or explosion. See Chemical dangers What is Zinc Nitride?Zinc Nitride (Zn3N2) Powder is a grey powder with a cubic crystal structure. It is soluble in hydrochloric acid and can decompose at 700℃. Zinc nitride is useful in optical and electronic devices. It is doped with Oxygen to prepare a potential nitride-based transparent conductor used in semiconductors. Zinc nitride can be obtained by thermally decomposing zinc amide (zinc diamine) in an anaerobic environment at temperatures over 200 °C. The by-product of the reaction is amm What is Zinc Nitride?Zinc Nitride (Zn3N2) Powder is a grey powder with a cubic crystal structure. It is soluble in hydrochloric acid and can decompose at 700℃. Zinc nitride is useful in optical and electronic devices. It is doped with Oxygen to prepare a potential nitride-based transparent conductor used in semiconductors. Zinc nitride can be obtained by thermally decomposing zinc amide (zinc diamine) in an anaerobic environment at temperatures over 200 °C. The by-product of the reaction is amm Instead, tungsten is thought to be formed from the explosions of massive stars. Each supernova explosion has so much energy that these newly created elements are jettisoned at incredible speeds of 30,000 km/s, or 10% of the speed of light – and that's how they get dispersed throughout the universe. Because of that, tungsten cannot be cast, forged, or rolled like other metals but must be pressed into shape while in powder form and then sintered. It is frequently alloyed with other metals, such as The size of the aluminum powder significantly affected the detonation performance of explosives. Small-sized aluminum powder is more likely to react with explosive detonation products with an advanced reaction time, large reaction volume, and fast energy release, which enhances the work capacity of explosives. Especially the addition of nano-sized aluminum powder can effectively improve the work capacity of explosives. Leonid Kaled et al. studied Alex nano-aluminum particles and their applicatio What is aluminum powder?Casting Tungsten Carbide Powder is manufactured by melting Tungsten metal and Carbon together. It has two eutectic compositions: WC and W2C. The melt is cast through quenching into extremely hard solid particles of fine crystal structure. The tungsten casting technique is now sufficiently advanced to prepare hollow and solid billets. Generally, grain size is much smaller than that normally obtained in arc-melted ingots. Improved mold surfaces virtually eliminate mold cont What is aluminum powder?As nano-aluminum powder (NAP) can improve the detonation performance of aluminum-containing explosives, more and more explosives with NAP as the metal ingredient have been studied. It is believed that the added nano-sized aluminum powder can significantly enhance the mechanical sensitivity of explosives. However, the mechanism for the enhancement has not been clarified. To illuminate the effects of NAP on the mechanical sensitivity of explosives, two RDX-based aluminum-co What is vanadium hydride?The vanadium hydride materials V(IV)-100 and V(IV)-25C-H2 were tested for room temperature hydrogen storage to compare their activity to V(III) alkyl hydride gels previously synthesized by our group. 9c Hydrogen PCT adsorption-desorption isotherms were thus recorded at 298 K and compared to standard isotherm of AX-21 recorded under the same conditions at 2-3 mmol total adsorption of H2 for accuracy. The initial material V(IV)-100 reached a maximum of 2.1 wt % at 130 bar

Impact of Iron Oxide Containing Formulations Against Visible Light Induced Skin Pigmentation in Skin of Color Individuals

Visible light (400–700nm), which contributes to 45% of solar radiation, contributes to skin darkening and worsening dyschromia, particularly in individuals with Fitzpatrick skin phototypes III and higher. Currently, sunscreens provide limited protection against that spectrum. Due to their capabilities in absorbing, scattering, and reflecting visible light, topical products containing pigments and metal oxides can provide additional photoprotection. This study evaluated the efficacy of two formul

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Other Materials and Aggregates for Foam Concrete

The coarse aggregate or other replacement for coarse cannot be used. This is because these materials would sink into the lightweight foam. Mix Details of Foam Concrete: The foam concrete properties depend upon the following factors: The volume of the foam, The cement content in the mix, The filler material, and The age. The water-cement ratio has very little influence on the properties of the foam concrete, unlike foam and cement content. Properties of Foam Concrete: The foam concrete properties

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Cement for Foam Concrete

Ordinary Portland cement is commonly used, but rapid-hardening cement can be used if necessary. Foam concrete can incorporate a wide range of cement and other combination, for example, 30 percent of cement, 60 percent of fly ash, and limestone in 10 percent. The content of cement range from 300 to 400 kg/m3. Sand for Foam Concrete: The maximum sand size used is 5mm. Use finer sands up to 2mm with the amount passing through a 600-micron sieve ranging from 60 to 95%. Pozzolanas: Supplementary ceme

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Li2O2 formation on the ATO surface

The deposition of Li2O2 and Li2O will advance simultaneously if Li2O formation is favored over Li2O2 formation on the ATO surface, but Li2O2 buildup on top of Li2O is kinetically favored over further Li2O deposition on ATO. As both products are electrically insulating, the Li2O/Li2O2 ratio and the discharge capacity are determined by the total thickness of the Li2O/Li2O2 layer that provides enough electrical resistance to prevent any further deposition of Li2O2 on top. This is an analog to the w

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ATO in Li O2 cells can effectively prevent the formation

We showed that using carbon-free cathodes such as ATO in Li-O2 cells can effectively prevent the formation of carbonates on the cathode surface (as generally observed with carbon cathodes). Instead, in addition to the common discharge product Li2O2, substantial amounts of Li2O are formed on ATO. Nonetheless, the fact that only 70% of the O2 consumed during discharge is released upon charge indicates that significant side reactions occur during discharge and charge. This effectively prevents a st

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There are several unrevealed questions for the oxidation process of graphite

What is the oxygen-containing functional groups' intrinsic formation and conversion path on GO? Several groups proposed that epoxy is the primary functional group, and the local strain induced by the oxygen-containing functional groups results in the cutting of graphene sheets. After exposure to water, acid catalyzes the hydrolysis of epoxide to form hydroxyl groups. Chen et al. proposed that epoxy and hydroxyl groups can be formed by directly attacking graphite sheets with •O• and HO• radicals.

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Utilizing the unique charge extraction properties of antimony tin oxide nanoparticles for efficient and stable organic photovoltaics

Simultaneously enhancing device performance and longevity and balancing the requirements on cost, scalability, and simplification of processing is the goal of interface engineering of organic solar cells (OSCs). During the scalable flame spray pyrolysis synthesis, our work strategically introduces antimony (Sb3+) cations into an efficient and generic n-type SnO2 nanoparticles (NPs) host. Accordingly, a significant switch of conduction property from an n-type character to a p-type character is ob

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What is Molybdenum Disulfide coating

What is Molybdenum disulfide?Molybdenum disulfide (MoS2) is an inorganic metallic compound composed of molybdenum and sulfur. It occurs naturally as the mineral molybdenite, the principal ore of molybdenum. This compound is silvery black in appearance and is relatively unreactive with other chemical elements. In terms of appearance and texture, molybdenum disulfide is similar to graphite. Like graphite, molybdenum disulfide is renowned for its low coefficient of friction, durability, and robustn

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Gas pressure on the reaction kinetics for synthesizing graphite

To further examine the effect of CO2 concentration and gas pressure on the reaction kinetics for synthesizing graphite, inert argon was first introduced into the 35 bar CO2–LiAlH4 reactor until the gas pressure of 75 bar was reached. During heating, CO2 reacted with LiAlH4 as sudden changes in temperatures and gas pressure were detected. The as-synthesized carbon exhibits stronger XRD peaks of graphite and weaker XRD peaks of amorphous carbon than the carbon synthesized under 35 bar CO2, further

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Formation mechanism of graphite derived from CO2

Graphite is the most thermodynamically stable allotropic form under standard conditions. However, carbon with a low graphitization degree (amorphous carbon) is easy to produce in the carbonization of traditional carbon precursors due to the very high kinetic barrier for the formation of graphite. The graphitization of amorphous carbon at high temperatures is indispensable for synthesizing graphite. Our synthesis method is different from the above two-stage synthetic procedure. The conversion rea

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Concrete foaming agent is a material that is used for lightweiht concrete products

The concrete foaming agent is a material that is used for lightweight concrete products. These concrete foaming agents contain some surfactants: sodium lauryl ether sulfate, linear alkyl benzene sulfonic acid, sodium lauryl sulfate, sodium laureate succinate, etc. In addition, the concrete foaming agent includes some amphoteric surfactants, solvents and alkaline ingredients, and water as carriers. THE MANUFACTURING PROCESS OF CONCRETE FOAMING AGENT is not very complicated. For production, there

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Having high-performance foaming agents

However, having high-performance foaming agents is only the first step in offering a complete solution for producing foam concrete. The foam itself is produced in a specially developed and calibrated foam-generating device that controls both the rate of production and the proportion of air and solution in the foam. The bubbles are stable and able to resist the physical and chemical forces imposed during the foam concrete's mixing, placing, and hardening. The Ha-Be foam system provides a complete

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One of the hardest materials - Boron Carbide

Boron carbide (B4C), is among the hardest materials used in manufacturing. Its hard surface and strong chemical bonds minimize wear even in harsh environments. This is why it's been used to make bulletproof vests, tank armor, and other extreme applications. Its hardness offers excellent protection and its light weight maximizes fluidity. This material also has a high neutron absorbance capacity, making it a good choice for radiation shielding. Therefore, it is widely used in the nuclear and othe

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Polymer foaming agent cement foaming agent

What is cement foaming agent?The cement foaming agent is a kind of polymer foaming agent; most of the liquid is clear and transparent, PH degree tends to be neutral. It is used in the cement foaming machine to make foam and produce the foam concrete needed. So cement foaming agent is necessary for the manufacture of foaming cement; let's say it is the partner of the cement foaming machine, and its use is inseparable from the cement foaming machine. The cement foaming agent can be widely used in

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Silicon nitride is then usually formed through a reaction

The basis of silicon nitride ceramics is silicon extracted from pure quartz sand (SiO2). Silicon nitride is then usually formed through a reaction of pure silicon with nitrogen at around 1,200 °C / 2,192 °F. Ceramic components made of silicon nitride are then produced using liquid-phase sintering from fine Silicon nitride powder, which is mixed with other sintering additives to enable complete compaction. The compaction and needle-shaped recrystallization of the silicon nitride particles is caus

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