Chemical and Thermal Shock Resistance Properties of Porous Silicon Carbide Ceramics| Chapter 5 | Research Aspects in Chemical and Materials Sciences Vol. 5

 Porous silicon carbide (SiC) potteries have been thought-out as promising candidates as the catalytic support, machinelike seals, hot-vapor and molten-metal filters, vapor turbine structure, heat exchanger tubes, etc. due to their excellent features. In such requests under corrosive atmosphere, the SiC porcelain materials knowing different type of corrosions such as; deposit-inferred corrosion, inactive oxidation, active decay, scale volatility, scale interplays, etc., depending on their composition. SiC stoneware filters can withstand assertive chemical and thermal shock environments during their use, being more favorable than polymeric or metallic materials. Thermal and synthetic resistance features ultimately determine the rightness and service life of potteries for applications in corrosive air. Detailed study on the effect of thermal shock and disintegration in strong acidic/soluble conditions at raised temperature on absorbent SiC ceramics and the microstructure and mechanical feature evolutions of the corroded SiC potteries are still very few. It is always a preferable choice to have earlier information on warm shock and corrosion resistance possessions of any new material before selecting the material for requests in one or more corrosion surroundings. Therefore in this phase it is aimed to review and quantitatively assess various types of thermal and synthetic corrosion at various hotnesses on the microstructure, materials features and flexural strength of porous SiC potteries prepared by differing methods. A brief summary is given on the current state of information on the effect of chemical and warm corrosion, influence of the chemical disintegration conditions (type of seasoning, acid/alkali, temperature, pressure, etc) and warm shock resistance (chilling/heating as a function of quenching temperatures and quenching phases, etc) on the material and mechanical features.

Author(s) Details:

Dulal Das,
CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700 032, India.

Nijhuma Kayal,
CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata-700 032, India.

Please see the link here: https://stm.bookpi.org/RACMS-V5/article/view/8898

Utilization of Industrial Waste in the Production of Sulfate-resistant Cement | Book Publisher International

 The findings of a research on current challenges of protecting building materials and structures against the impacts of aggressive environments are presented in this monograph. There is a further need for systematic study and their usage in the manufacturing of Portland cement in conjunction with the possibilities of generating new construction materials with greater resilience in demanding conditions using secondary raw materials and wastes from industrial companies. In this regard, in comparison to mining company dump deposits, concentration tailings of ferrous and non-ferrous metals are promising in terms of composition and reserves of valuable components. Tens of millions of tonnes of "tailings" rich in Al2O3, Fe2O3, and other minerals are produced at AGMK's concentration plants. Every year, significant components for the manufacturing of cement, generated during the enrichment of lead and copper-bearing ores, are dumped into landfills. The monograph covers the findings of research into the use of tailings from the Almalyk Mining and Metallurgical Combine's lead concentration and copper smelting facilities as an active mineral addition in the manufacturing of sulfate-resistant Portland cement. In the presence of lead-copper active mineral additives, the impact of mineralogical compositions of clinkers from cement factories in Uzbekistan on the phase composition and qualities of the resulting sulfate-resistant cement is investigated. The importance of additives in building strength and constructing the structure of a cement stone has been demonstrated.

A change in the mineralogical composition towards a decrease in the content of tricalcium aluminate and a decrease in the basicity of clinker due to high-silica waste, which meets the requirements for sulfate-resistant cements, results in an acceleration of the hydration and hardening process of sulfate-resistant cement.

Scientists and engineers working in research organisations in the building materials and construction industries, as well as professors, masters and bachelors students at technical institutions, will find the monograph useful.

Author(s) Details:

Z. A. Mukhamedbaeva
Department of Technology of Silicate Materials and Noble Rare Metals, Tashkent Institute of Chemical Technology, Tashkent, Uzbekistan.

View Book: https://stm.bookpi.org/UIWPSC/article/view/7172