Rare earth elements sound very rare, but Cerium is about the 25th most abundant element in the Earth’s crust, and is sometimes jokingly referred to as the “least rare rare earth element”. It was first discovered in 1803 by the German chemist Martin Heinrich Klaproth, who named it Cerium after the dwarf planet Ceres. Chemical …
Cerium, a rare earth element that is not at all rare. Read More »
When the topic of rare earths is opened, Lanthanide, a member of the elemental table and one of the largest families of rare earths, is absolutely indispensable.Most of the Lanthanide elements are found in both monazite and diabase minerals, and they tend to be mixed together in fairly constant proportions (25%-38% of them are Lanthanum), …
The previous article mentioned that the rocks brought back by Apollo contained the superconducting element Yttrium, in fact there are quite a number of other rare earth elements on the moon as well, such as the element Scandium which is quite rare…
Recently, there has been a resurgence of the topic of superconductivity, a phenomenon in which a material’s electrical resistance becomes zero at a temperature below a certain point. In fact, in 1986 at the IBM lab in Switzerland, scientists Muller and Bednortz found that a series of ceramics at 35 K showed superconductivity. The following …
Yttrium elements brought back by Apollo from the Moon. Read More »
When it comes to the relationship between diamonds and superconductors, the most exciting thing is the superconducting properties of diamonds. The discovery that diamonds can exhibit superconducting properties under the right conditions has attracted a lot of attention from the scientific community and brought new possibilities in superconducting technologies and applications. As early as 1991, …
Diamonds are inextricably linked to superconductors Read More »
Superconductors are an amazing physical phenomenon that exhibits properties of zero resistance and complete repulsion of magnetic fields under certain conditions. The development of this field is entangled with many famous scientists, important experimental discoveries and theoretical breakthroughs. Let’s explore the trajectory of superconductor history and understand how it has gradually been revealed and applied from a mysterious phenomenon.
Mold Structure System When designing a set of molds, 4 objective conditions must be taken into consideration. 1. Steel structure: Hardness, tensile and compressive strengths, toughness and stress distribution analysis for core insert , mold frames, slides, repositioning tips, and mold seats. 2. Physical and chemical properties of the material of the end product, and …
There are two main types of machining, one is to make a mold and then make a large number of copies, and the other is to use various tools and specific materials to make the required shapes. Individual processing includes the following three major categories. 一、Cutting: drilling, milling, turning 二、Grinding: Surface grinding, cylinder grinding 三、Electrical …
Alloys for mold Steel Mold steel is a type of tool steel that is used to make various types of forming tools: cold work, hot work and plastic mold steel. What elements can be used to make mold steel? Main alloys: carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), nickel (Ni), chromium (Cr), …
“Diamond is just plain old carbon”. That’s right. Diamonds, like graphite, are isomers of pure carbon. That’s why mankind has never given up on the search for a way to create artificial diamonds. After 157 years, it was discovered that the most important factor in successfully turning carbon into diamonds was the use of a catalyst, or catalyzer.
