Awad Mogoda Bücher

Exploring the multifaceted roles of antimony and zirconium, this book delves into how antimony enhances the mechanical properties of alloys and is integral in various medical applications. It highlights the use of antimony oxides in catalysis and as conductors. Additionally, zirconium's significance as an opacifier in ceramics and its critical function in nuclear materials are discussed. The text also covers zirconium dioxide's applications in laboratories and metallurgy, emphasizing its unique ability to selectively trap potassium ions in the gastrointestinal tract.

Focusing on the diverse applications of titanium and zirconium compounds, the book explores their roles in energy and environmental sectors, including photovoltaics and photocatalysis. It highlights titanium oxide's unique properties and the influence of oxide host changes on these applications. Additionally, zirconium's significance in biomedical fields, such as dental implants and prosthetics, is discussed, alongside its critical use in the nuclear industry due to its mechanical properties and corrosion resistance. Overall, the text emphasizes the importance of these materials in electronic industries.

Porous silicon (PS) plays a crucial role in various fields, including optoelectronics, sensors, and photovoltaics. It serves as a substrate for molecules and is essential in applications like mass spectrometry and energy storage. PS is typically produced through anodic etching or stain etching, but the metal-assisted chemical etching method offers a faster and more uniform alternative without the need for external bias. This highlights its versatility and importance in advancing technology across multiple disciplines.

The study explores the formation of porous silicon layers through silver-enhanced chemical etching, revealing that various concentrations of silver ions, HF, and HNO3, as well as etching duration, significantly influence the characteristics of the porous structure. SEM analysis showed that a specific silver nitrate concentration led to a more uniform porous silicon layer. Impedance data indicated increased Si dissolution with higher acid concentrations. The process proved faster and produced smaller, regular pores compared to traditional methods, with EDX measurements showing no silver residue post-etching.

The study investigates the corrosion resistance of various titanium and alloy surfaces coated with n-TCP and GO/CS/n-TCP composites in serum. It reveals that the open-circuit potential increases over time, indicating the formation of a protective film, which stabilizes for about an hour. The results suggest that while corrosion resistance improves initially, it declines after 21 days due to partial film decomposition. The coatings enhance passive film growth, but prolonged exposure leads to a dissolution of the protective layer, with the composite coating showing the best resistance.