Summary Excess water production usually has negative influence on volumetric sweep efficiency, and as a result deteriorates the profitability of production operations. In the past half century, numerous techniques were extensively applied in frame of water shutoff technology including polymer-based macro- and microgels, emulsions, sols, crystalline …
ادامه مطلبFig. 1 illustrates the process of preparing the cauliflower-shaped Ni@PCS core-shell functional composites. There are four main steps in this process as shown in this figure. (1) Acidification: First, the PCS particles were acidified in a 0.6 mol/L HCl solution for 2 h to remove impurities such as CaO and achieve the effect of etching the …
ادامه مطلبMullite Tube Description. Mullite tube is made of silicate ceramic mullite. The main crystal phase of mullite tube is 3Al2O3·2SiO2. It has low thermal expansion, good mechanical strength, and resilience at elevated temperatures.
ادامه مطلب1.2 Zircon structure. Zircon is a mineral that is an orthosilicate accessory. Its chemical formula is ZrSiO 4 (Z = 4) with the space group I 4 1 / amd.The zircon structure is made up of chains of consecutive, edge-shared SiO 4 and ZrO 8 polyhedra that pass along the c axis. The structure is rather wide; it incorporates "channels" of evidently vacant …
ادامه مطلبA wet mixing process is proposed for filled rubber composites with a high silica loading to overcome the drawbacks of high energy consumption and workplace contamination of the conventional …
ادامه مطلبThe ion-exchange process during silicate glass dissolution is mainly proton (H +)—alkali ion, e.g., sodium (Na +) exchange. The process can be complex due to the different local environment ...
ادامه مطلب3. Characterization. HSPs are characterized using common material science techniques. Scanning electron microscopy (SEM) imaging is the main technique employed to determine the HSP size, while transmission electron microscopy (TEM) helps in determining the shell thickness and shell type (solid or porous), in addition to the HSP …
ادامه مطلبMultifunctional nanoporous magnetic zinc silicate-ZnFe 2 O 4 core-shell composite for bone tissue engineering applications ... [33][34][35][36][37][38] process, the exothermicity of the redox ...
ادامه مطلبFTIR cockle shell (Anadara granosa) has the potential to produce analysis also showed the structure of calcium silicate with the calcium silicate (CaSiO3) because it contains CaCO3 which formation of Si-O-Si and O-Si-O functional groups at a when calcined at a temperature of > 800oC produces CaO [5]. wavelength of 460 cm-1, Si-O-Ca at a ...
ادامه مطلبIn this work, a cauliflower-shaped nickel-plated porous calcium silicate ([email protected]) functional composite with core-shell structure was successfully fabricated via electroless plating.
ادامه مطلبThe main products are ordinary silicate 42.5 grade, 52.5 grade, composite silicate 32.5 grade cement and other varieties. Among them, composite cement is favored by the market because of its high workability, high strength, high …
ادامه مطلبHerein we devise and demonstrate a general strategy to synthesize composite silicate with hierarchical hollow structure: (1) coating mesoporous silica on …
ادامه مطلبThe commercial method of methanol production is based on reaction of carbon monoxide and hydrogen in different reactors. There is some methanol production technology in the world. In the Lurgi process technology, methanol reactor is a shell and tube reactor that tubes are packed with the catalyst pellets [1]. In the ICI process, the …
ادامه مطلبThe manufacturing process consists of different stages i.e. dilution of sodium silicate binder, mixing of binder and perlite in a container, flotation of wet-mix, moulding and compaction, demoulding and drying as detailed elsewhere [21]. The dilution of sodium silicate was made in drinkable tap water.
ادامه مطلبK2Ti6O13 whiskers were prepared by firing a mixture of short aluminum silicate fibers and gel powders obtained from a sol–gel process. During the preparation process, the fiber surface was coated with K2Ti6O13 whiskers after the fibers were subjected to a heat treatment carried out at various temperatures.
ادامه مطلبThe Au@silicate/PVA core/shell composite nanofibers are prospectively applicable in portable, flexible, freestanding, and stable SERS substrates for large-scale …
ادامه مطلبArticle. Full-text available. Feb 2022. Ke-Chun Shen. Zhao-Qi Yang. Lei-Lei Jiang. Guang Pan. In this paper, the buckling and post-buckling behavior of perfect and perforated composite...
ادامه مطلبA composite of PANI, PPy, and hexagonal type mesoporous silica (HMS) was prepared and applied for the removal of Cd(II) ions from aqueous solutions [100]. The results showed that the PANI/PPy/HMS composite was a good absorbent for Cd(II) in aqueous solutions, and the adsorption equilibrium was made within 8 min. The …
ادامه مطلبThe carbon fiber manufacturing process also is notoriously difficult and expensive. Tool-up of a single world-class production line is capital intensive — $25 million minimum for equipment alone — and can take up to two years to implement. In fact, the cost can be much more.
ادامه مطلبThis study aims at the development of magnetically recyclable solid catalysts for the production of biodiesel. To achieve this, the magnetically susceptible Fe3O4/MCM-41 composites with core-shell ...
ادامه مطلب1 Preliminary considerations. By-products from the steel industry contain valuable contents. So this article mainly refers to approximately 200 million t/a of steel slags from converters and electric-arc furnaces worldwide, and does not discuss blast furnace slags, which have already been processed to a large extent for many years as a latent hydraulic …
ادامه مطلبThe formation mechanism of zinc silicate over ZnFe 2 O 4 spheres is shown in Fig. 1.The surface charge of ZnFe 2 O 4 spheres in pH > 7 and also in the presence of CTAB is the key factor by which the core-shell structure is obtained. Spinel ferrite magnetic particles are considered as hydrophilic materials which have an isoelectric point (IEP) …
ادامه مطلبOn the basis of the above observations, the following growth mechanism was proposed for the formation of the Y 2 Si 2 O 7 @Zn 2 SiO 4 composite silicate hollow sphere. In the process of water bath reaction in the zinc solution, an etching process occurred at the silica shell because of the mutual effects of zinc ions and ammonia, …
ادامه مطلبAbstract. It is challenging and expensive to manufacture composite cylindrical shells with characteristics such as large diameters and lengths and 0°-fibers for applications such as bridge piers and wind …
ادامه مطلبThere are four main systems in the centrifugal production process: raw material system, melting system, fiber-forming system, and combustion system. ... belt, blanket, felt and tube shell. Most insulation materials are porous, and the air stored in the holes has a low thermal conductivity, so they could play a role in heat insulation and heat ...
ادامه مطلبA specific amount of as-prepared zinc-nickel precursor was blended with graphene oxide (GO) solution. And the content of GO in the composite was 30 wt%.By a simple mechanical agitation process for 24 h, zinc-nickel precursor/GO composite was prepared.Then, the composite was centrifuged at a relative low revolving speed before …
ادامه مطلبIn order to solve the above problems, Gong et al. (2021) introduced silicate into the preparation process of magnetic biochar, and produced a batch of silicate composite biochars with uniform particle size and high hardness. Studies have shown that the material has the characteristics of easy separation, which is convenient for recycling.
ادامه مطلبapproach developed in laboratory conditions for the production of various silicate composite materials has been developed. The separate production sections specialized for the implementation of different stages of the technological process and the necessary standard and innovative technical equipment are considered. The specific characteristics
ادامه مطلبThis work provides a new material, Li +-doped erbium ytterbium silicate, with reliable and high temperature sensing sensitivity for optical thermometers.The Li +-doped erbium ytterbium silicate films were prepared by RF magnetron sputtering.The film shows strong green visible emission, which is related to the radiation transitions from …
ادامه مطلبThe recovery process can be intensified by the self-reduction of core-shell EAF dust -biochar composite pellets under microwave irradiation. In this study, the effects of various parameters on reduction of the core-shell EAF dust -biochar composite pellets in N 2 were explored. It was demonstrated that under the optimal conditions of …
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