ADVANCED CERAMICS PROGRESS
Year:2023 | Volume:9 | Issue:1|Papers Count:6

Thermal Barrier Coatings (TBCs) reduce the working temperature of the substrates and protect them from hot corrosion and oxidation. In recent years, scientific research into the TBCs and their innovative applications have gained increasing popularity insofar as since 1980, the number of relevant published articles has increased up to about 400 times annually. These coatings play an essential role in enhacing the efficiency of the substrate and engines and for this reason, tracking their research process can help advance future research studies and accelerate their progress expansion rate. According to the results from scientometrics and tracking research, the United States was initially ranked first in article production in this field of surface engineering, followed by Germany and England. However, since 2011, China has remained in the first place by a large margin. The combined annual growth rates of Iran and India reached their highest value, indicating that these countries concentrated on the gas turbine and energy sectors. Since these coatings play a significant role in improving the performance of gas turbines, variations in their scientific progress can be considered one of the leading indicators of material engineering progress in such turbines.

In this research, sol-gel experimental conditions are imposed to prepare a new Mn-containing SiO2-based bioactive glass. The current study primarily aims to investigate the impact of the presence of manganese ion on the glass structure, bioactivity, and cytotoxicity. The obtained glass-ceramics were characterized using a X-Ray Diffractometer (XRD). According to the observations, crystallization of silicorhenanite and calcite phases in the manganese-containing sample were inhibited before and after soaking in the simulated body fluid (SBF), respectively. In vivo bioactivity evaluation confirmed the bioactive nature of the obtained powders. Finally, the cellular test was carried out, the results of which demonstrated non-cytotoxicity of the samples towards human Bone Marrow Stromal Cells (hBMSCs) cells up to 7 days.

The simplicity and widespread use of adhesive mortars for affixing ceramic tiles as ornamental finishes for indoor and outdoor applications has flourished the market of adhesive dry mortars. In tilling technology, attaching ceramic tiles to different types of surfaces requires a mortar with the requisite workability, flexibility, and adherence. With the evolution of building industry, mortars are now manufactured as ready-to-use products in which mineral binders and aggregates are properly combined. In addition to the fundamental components (cement, lime, sand), additional additives and admixtures are frequently added to the mortar formulations to improve their specifications and achieve varied technical features. Depending on their application purposes, incorporation of these additives and admixtures should be examined in depth to obtain the most significant contributions. In this regard, this article examines the already conducted studies and research works concerning Cementitious Tile Adhesives (CTAs) and explores the adhesion mechanisms, CTA constituents, classification, and standards, and performance evaluation of the cementitious ceramic adhesive. The results from extensive research indicate that a number of distinct parameters affect the adhesion properties of the CTAs. However, further studies are still required to enhance their engineering attributes.

In this research, cobalt oxide solid solution nanoparticles with different molar percentages of zinc content (2. 5, 5, 7. 5, 10, 15, 20, 30 mol %) were synthesized through hydrothermal method. Cobalt nitrate and zinc nitrate were used as the sources of cobalt oxide and zinc contents in this research. In order to investigate the structural properties, the chemical state, optical, photocatalytic properties as well as the microstructure of the synthesized nanoparticles were characterized based on the XRD, BET-BJH, UV-Vis, XPS, TEM, and FESEM analyzes. The results of the X-ray phase analysis showed that addition of this content to the structure of cobalt oxide led to a decrease in the crystal size. The crystallite sizes of the pure and doped samples were about 9. 48 nm and about 8. 8 nm, respectively. According to the FESEM images, the particle size of the pure sample was in the range of 20-40 nm, and that of the doped ZCH-300 sample (10 % Zn) in the range of 20-30 nm. The specific surface areas (BET) of the pure sample and the sample with 10 % zinc were about 75 m2/g and 92 m2/g, respectively. Compared to the pure CH nanoparticles Doped Co3O4 (CH), mesoporous nanoparticles were observed to have the highest photocatalytic activity. The photocatalytic analysis results showed that the highest degradation percentage of the solution, i. e., 10. 6 (ηZCH-300 = 10. 6 %), was obtained in the presence of the doped sample with zinc cation (10 % Zn).

Each year, production of ceramic materials causes many environmental repercussions including air and soil pollution. In addition, due to their nature, industrial environments are susceptible to serious damages and risks that can be potentially exacerbated with the increasing growth of technology. In this regard, the current study aims to evaluate the policies on the prosperity of the domestic production of advanced ceramics with the approach to environmental protection. The current research is among the mixed and exploratory researches that was carried out in two qualitative and quantitative stages. The statistical population includes the senior and executive managers of the "advanced ceramics production industries" in the Ministry of Industry, Mining, and Trade, Iran. This study used the document review tools and semi-structured interviews with 14 academic and executive experts in this industrial field. Based on the "theme analysis" method in this research, the results and consequences of industrial policy assessment were extracted according to the environmental protection approach and finally, these policies were evaluated. The results of this evaluation showed that although some of the production processes of ceramic materials have been modified based on the environmental policies, some other processes are still inconsistent with environmental policies and requirements; therefore, the extent of pollutants in the industrial processes is not accurately monitored and measured, and the level of pollutants in most industrial places is more than the standard level.

Nowadays, implants are considered the most suitable alternatives to restoration of lost organs owing to their good mechanical properties and smooth surface, which are similar to those of bone tissue. One of the newest types of implants is zirconia implant, which reduces the possibility of infection due to its one-piece design. Zirconia implants proved to be biocompatible and less prone to corrosion than their traditional titanium counterparts, making them a beneficial option for dental implantation. Another reason why zirconia implants are superior to titanium ones is their better compatibility with soft tissues and greater durability against pressure and tension. Zirconia implants generate less stimulation of the soft tissues, hence lower levels of irritation and inflammation. As a result, zirconia implants are less likely to cause irritation or inflammation. In this research, articles published within the time period of 1980-2022 were examined and processed using VOSviewer software. The total number of articles examined was 3122, 47.6 % of which were published within the last five years. The results revealed that a majority of the articles were from America and Germany. India had the highest Compound Annual Growth Rate (CAGR) of 40 %, followed by Brazil and Spain with the CAGRs of 28 % and 25 %, respectively. Moreover, developing countries such as Poland, Taiwan, Iran, and Egypt have recently started their research activities in this field.