Diamond ring We all know that basically newlyweds will buy diamond rings, and diamond rings also represent love. Of course, now that the diamond ring has been fired to a "sky-high price", it must wait until the diamond ring can be produced by hand before its price will come down. It is worth mentioning that just recently, the WeChat of Xiamen University Admissions Office exposed the meeting of students from colleges that plan to recruit strong students. Among them, "physics" is the most striking, and it turns out to be a "diamond ring". Xiamen University gives diamond rings to freshmen. Is Xiamen University really so "local tyrant"?
In fact, on Tanabata, some freshmen majoring in physics in Xiamen University's Strong Foundation Project have already received this kind of "diamond ring". Before talking about "diamond ring", we might as well learn about Xiamen University's "Strong Foundation Plan". In fact, the Strong Foundation Program was first launched by Xiamen University in 2020. The purpose is to explore a multi-dimensional evaluation model, select young students who are ambitious, interested and talented in mathematics, physics, chemistry, biological sciences, history, philosophy and other fields, carry out special training, and transport reserve talents for major strategic areas of the country. Xiamen University is also one of the pilot universities announced by the Ministry of Education.
In fact, among the six subjects in Xiamen University's "Strong Foundation Plan" this year, besides physics, other basic subjects have also prepared gifts for freshmen, but they are not as dazzling as physics. Let's go back to the diamond ring. In fact, this diamond ring is not a real diamond ring. It is different from ordinary diamonds. This diamond ring is made of Mosan stone. Maybe many people don't know Mo Sanshi. It is also one of the brightest gems in the world, second only to diamonds in hardness. It is the second hardest gem in the world. Mosan stone even surpasses diamond in brightness, luster and fire color. Of course, because diamonds are advertised more than Mo Sanshi, few people know that there will be many "diamonds" made of Mo Sanshi on the market in the near future. After all, the value of Mo Sanshi is there.
In fact, the composition of this Mosan stone is silicon carbide, which is also the most advanced scientific and technological achievement in the semiconductor industry and is regarded as the silicon carbide crystal of the third generation semiconductor material by the industry. This shows that Mosang stone is very valuable, so why should the School of Physics and Technology of Xiamen University give such important information to students? In fact, this is mainly because the college has been able to synthesize silicon carbide by itself. In the past twenty years, the School of Physics and Technology of Xiamen University has been studying the silicon carbide ultraviolet point detector, power devices and material growth, and has made great achievements. At present, most of the silicon carbide synthesized by the Institute of Physical Technology is used as a chip material, and a small part will be processed into a "diamond ring", which is the origin of this diamond ring.
Xiamen university gives diamond rings to freshmen of physics department.
Recently, Xiamen University presented a diamond ring to the freshmen of Physics Department of Qiangji Planning College. It is reported that this "diamond ring" is made of Mosan stone, the brightest gem in the world, and its hardness is second only to diamond. However, in the eyes of Xiamen University professors, Mo Sanshi is actually silicon carbide, which is a cutting-edge scientific and technological achievement in the semiconductor industry.
Characteristics of mosan stone
Color: colorless, blue, green, yellow-green, yellow; Crystal system: hexagonal crystal system
Hardness: 9.25
Gloss: glass, sub-metallic luster
Stripe: gray-green
Transparency: transparent to opaque
Density: 3.218-3.22g/cm3.
The material of ordinary ring
Common ring materials on the market are gold, 925 silver, K gold, platinum and so on. Besides, there are some special ring materials, such as titanium and stainless steel.
Among the common diamond ring materials, platinum is the most precious and rare, and it is deeply loved by people because of its pure and impurity-free characteristics. Making a ring symbolizes that love is eternal because of purity.
K gold is also one of the most common diamond ring materials. K gold is different from other ring metals, it is an alloy of gold and other metals, and it can also be called impure gold. There are many colors such as K white, K yellow and rose gold.
Gold is a traditional jewelry material, which has been made into rings, earrings, necklaces and other jewelry since ancient times, and is deeply loved by all walks of life.
Among the common ring materials, 925 silver is the cheapest one, but parity does not mean low grade, but gives the ring some simple love.
Xiamen University's admission notice comes with a Mosan diamond ring. What's the difference between it and diamonds?
Diamonds are one of the most beautiful and expensive jewels today. They are also very popular. In many parts of the world, diamonds are an important symbol of engagement. Because diamonds are so popular and expensive, they have been the favorite of imitations for many years. Cutting glass, rhinestones and cubic zirconium all try to replicate the beauty of diamonds at a lower cost. But these are not particularly good imitations, because they lack the luster and luster of the real thing.
At present, the best attempt to imitate diamonds is a product called mosan stone. 1893, the Nobel Prize winner and French scientist Dr. Henry Mossan discovered the trace of a new mineral-natural silicon carbide, which was found in an ancient meteorite. Later, in memory of Dr. Mosangshi, this mineral was named "Mosangshi". Because its supply was very limited, it was not suitable for jewelry at that time.
More than a century later, someone invented the process of producing large-scale single crystal molybdenite. 1995, a diamond cutting master observed the samples of silicon carbide crystals and thought that if cut properly, these crystals could be made into beautiful jewelry. They also realized that in order to use Mosan gemstone, it must be manufactured manually, and this gemstone is basically not available in nature. Later, a company cooperated with the national laboratory to develop mosan stone imitating diamonds.
Recently, the admission notice of Xiamen University's "Strong Foundation Program" will be sent soon, the most striking of which is the gift that "Physics" brings: a diamond ring made of Mo Sanshi.
Mosan stone can be compared with real diamond in brightness, glossiness and hardness. Mohs hardness is a standard of mineral hardness, named after German mineralogist Frederic Mohs. We know that diamond is one of the hardest substances in nature, and its Mohs hardness can reach 10. The Mohs hardness of artificial Mosan stone reached 9.25, even surpassing rubies and sapphires.
Diamond is a natural mineral and one of the two crystalline forms of carbon. Chemically speaking, diamond is a pure carbon crystal, and each carbon atom is closely connected with other carbon atoms nearby through four bonds. Because of the strength of these bonds, diamond is the hardest natural substance known. For the same reason, carbon fiber has incredible strength.
Why is the silicon carbide that makes up Mosanite almost as hard? The strength of silicon carbide also depends on carbon bonds. Silicon carbide is one of the hardest compounds known to mankind. In addition, the physical and electronic properties of silicon carbide make it the first choice for short-wave photoelectron, high temperature resistance, radiation resistance and high power/high frequency electronic devices.
Mosang stone jewelry is inspected by trained personnel. All the jewels sold are of "very good" quality. They all have good colors and "clean eyes", which means that you can't see the defects with the naked eye. Generally speaking, other things being equal, the retail price of Mosang stone jewelry is about one tenth of that of diamond. So in order not to be cheated, it is important to distinguish between two kinds of gems.
Unfortunately, Mosan stone is such a closely matched diamond that even a skilled jeweler can't tell the difference in appearance. At present, only professional instruments can distinguish the two. So try to choose big brand merchants when buying diamonds.
How magnificent is Xiamen University? Why give a "diamond ring" to freshmen?
Xiamen University is a national key university, 2 1 1, 985 national key construction university. Xiamen University also gave students a diamond ring when it issued the admission notice, which caused an uproar. Everyone is curious. When did the school give them the diamond ring? What happened?
First, the admissions officer held a meeting ceremony. Just as the Xiamen Admissions Office said that the admission notice for the strong foundation project was about to be issued, the official WeChat of the Admissions Office immediately released the enrollment meeting for the strong foundation project of Xiamen University. There is not only an admission notice, but also a diamond ring.
Second, what is the significance of the strong foundation plan? Strong foundation plan is a plan for colleges and universities to train talents for the country. Mainly in the department of mathematics, physics, chemistry and other highly specialized disciplines to select interested and capable students for training. Xiamen University is one of the pilots of the Strong Foundation Program.
Third, the scope of the gift? Xiamen has prepared a meeting ceremony for all disciplines of the Strong Foundation Program, but only the meeting ceremony in physics is the most special, and it is a diamond ring.
Fourth, a real diamond ring? In fact, everyone misunderstood. What looks like a diamond ring is not a diamond, but a gem. It is made of Mosan stone, which is second only to diamond in hardness and is the brightest gem in the world. Its luster and hardness are higher than that of diamond.
5. grandstanding or sincere reward? In our eyes, gems are valuable, but in the eyes of physics professors, mosan stone is silicon carbide, just a semiconductor material. Not grandstanding, just to let physics students know physics as soon as possible.
Sixth, diamond rings have special significance. The diamond ring sent by the Physics Department of Xiamen University is not only to let students know about the subject, but also has a deeper meaning. It's not an ordinary diamond ring for students. There are words written on it, to the effect that I hope the students will love physics and Xiamen University together.
I have to say that Xiamen University is also very heroic. Mosan stone is more expensive than diamond, but for the development of students, everything is worth it.