Asbestos-containing waste detoxification by a microwave heat treatment using silicon carbide as an inorganic heating element

2020 ◽  
Vol 22 (3) ◽  
pp. 826-835
Author(s):  
Myung Hwan Hong ◽  
So Young Joo ◽  
Seyul Kim ◽  
Chan Gi Lee ◽  
Dong Wook Kim ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Silicon Carbide ◽  
Heating Element ◽  
Microwave Heat

Composites Obtained from Alumina and Polymer Derived Ceramic

2018 ◽  
Vol 912 ◽  
pp. 141-146 ◽  
Author(s):  
Glauson Aparecido Ferreira Machado ◽  
Rosa Maria Rocha ◽  
Ana Helena Almeida Bressiani
Keyword(s):  
Heat Treatment ◽  
Silicon Carbide ◽  
Linear Shrinkage ◽  
Density Variation ◽  
Silicon Oxycarbide ◽  
Alternative Route ◽  
Preceramic Polymer ◽  
Pure Alumina ◽  
Polymer Derived Ceramic ◽  
Alumina Composites

Alumina-mullite composites with low shrinkage can be made by reaction bond using mixtures of alumina, aluminum and silicon carbide. In this work, an alternative route is used to produce alumina composites with low shrinkage. Here alumina samples containing additions of 10 and 20 wt% of a preceramic polymer were warm-pressed and treated in the range of 900 -1500°C to produce alumina based composites. The obtained composites were analyzed by linear shrinkage and compared to pure alumina samples sintered at the same temperature range. It were also evaluated the density variation and crystalline phases formed during heat treatment of alumina composites. Results showed that alumina-silicon oxycarbide and alumina-mullite composites were obtained with lower shrinkage than pure alumina samples.

scholarly journals A comparative study of extraction techniques for maximum recovery of bioactive compounds from Ganoderma lucidum spores

2020 ◽  
Vol 49 (1) ◽  
Author(s):  
Diana Carolina Saavedra Plaza ◽  
Carlos Ricardo Soccol ◽  
Miguel Daniel Noseda ◽  
Valcineide Oliveira de Andrade Tanobe ◽  
Oranys Marin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Antioxidant Activity ◽  
Comparative Study ◽  
Ganoderma Lucidum ◽  
Antioxidant Properties ◽  
Extraction Techniques ◽  
Microwave Exposure ◽  
Vis Spectroscopy ◽  
Spore Walls ◽  
Microwave Heat

This study aimed at evaluating effective methods for breaking the hard and insoluble spores of Ganoderma lucidum to recover functional biomolecules. Rupture techniques were evaluated such as manual maceration (RM), maceration with spheres of various materials (BR), and microwave exposure plus maceration with steel/chrome spheres (MBR1). Spore rupture was evaluated using UV-Vis spectroscopy, which showed vibrations of 2955, 1642, 1240, 1080 and 1746 cm-1 corresponding to changes in spore walls. The MBR1 extract contained the largest amounts of carbohydrates (19.80 mg.g-1 spores) and polyphenols (2.21 mg.g-1 spores), whereas the BR extract had higher antioxidant activity (57.22%Inb DPPH). The MBR1 and BR extracts contained 62.2 and 73.5% glucose, respectively. Both methods also involved significant extraction of carbohydrates and proteins. The best way to extract biomolecules from spore walls is to perform a microwave heat treatment and break the walls with steel/chrome spheres; this produces large quantities of carbohydrates with antioxidant properties.

The Phase Composition and Structure of Silicon-Carbon Coatings

2019 ◽  
Vol 970 ◽  
pp. 283-289
Author(s):  
Alexander S. Rudenkov ◽  
Alexander V. Rogachev ◽  
Alexander N. Kupo ◽  
Petr A. Luchnikov ◽  
Nataliya Chicherina
Keyword(s):  
Heat Treatment ◽  
Silicon Carbide ◽  
Phase Composition ◽  
Ion Beam ◽  
Ion Source ◽  
Ion Beam Sputtering ◽  
Carbon Coatings ◽  
Silicon Carbon ◽  
Composition And Structure ◽  
Beam Sputtering

The effect of the formation and heat treatment modes of silicon-carbon coatings deposited by ion-beam sputtering of silicon carbide on their morphology, chemical and phase composition is determined. It has been established that an increase in the power of the ion source from 432 W to 738 W leads to a decrease in the sp3/sp2 phase ratio by 1.7 times and an increase in the ratio of Si-C/Si-O bonds by 1.9 times. It is shown that doping of carbon coatings with silicon carbide increases their heat resistance.

Reducing Synthesis Time of LiNi0.8Co0.15Al0.05O2 (NCA) Cathode Material by Microwave Heat Treatment

2019 ◽  
Author(s):  
Putu Hendra Widyadharma ◽  
Muhammad Alief Irham ◽  
Tirta R. Mayangsari ◽  
Octia Floweri ◽  
Akfiny Hasdi Aimon ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cathode Material ◽  
Synthesis Time ◽  
Microwave Heat

Heat Treatment and Analysis of Al- 7005 Alloys Reinforced with Sic Metal Composite

2018 ◽  
Vol 7 (3.34) ◽  
pp. 376
Author(s):  
Arun. A ◽  
Dr V.Sathiyamoorthy ◽  
Amirthalingam. P ◽  
Manikandan A ◽  
Manikandan K ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Silicon Carbide ◽  
Physical Properties ◽  
Aluminium Alloy ◽  
Treatment Process ◽  
Stir Casting ◽  
Metal Composite ◽  
Casting Method ◽  
Mechanical And Physical Properties ◽  
6061 Aluminium Alloy

This paper deals with the 7005 aluminium alloy characterization which has similar physical properties to 6061 aluminium alloy, depending on the temper, may be slightly stronger. To increase their mechanical and physical properties silicon carbide had been introduced in it as reinforcement. Based on mass three different compositional were made and mixed thoroughly, and cast. Stir casting method is used for casting proportioned alloys. Heat treatment process is carried out after casting the alloy is mixed in the three proper compositions. Mechanical properties like hardness, Tensile strength and impact strength were conducted and analyzed. Properties can be altered in a better way using silicon carbide as an reinforcement in aluminium-7005.  

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