According to data released by the Indian health department on March 23, the number of confirmed cases of new coronary pneumonia in India has risen to 433. The Indian Civil Aviation Authority announced on the 23rd that it would suspend the op…
What is graphite?Graphite is a soft, crystalline form of carbon. Other forms are diamond and fullerenes ("buckyballs"). It is gray to black, opaque, and has a metallic luster. It is flexible but not elastic. Graphite occurs naturally in metamorphic r...…
The polymers obtained by the polymerization of acrylic acid and its esters are collectively referred to as acrylic acid tree esters, and the corresponding plastics are collectively referred to as polyacrylic plastics, of which polymethyl methacrylate...…
What is hafnium carbide?Hafnium carbide (HfC) belongs to so-called "hard metals." In the periodic table, these materials are carbides of transition metals of groups IV–VI. HfC is a promising candidate for extremely high-temperature applications owing...…
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