Technetium was the first artificially produced element. Its Latin name technetium (Tc) comes from the Greek word technetos (artificial).
Technetium is a chemical element. Chemical symbol Tc, atomic number 43, belongs to group VIIB of the periodic system and is an artificial radioactive element. All technetium isotopes with mass numbers of 90 to 110 have been discovered. The isotope with the longest half-life is technetium 98. In 1937, Italian C. Perel and E.G. Segre of the United States bombarded molybdenum with deuterons and produced element 43 for the first time, and named it technetium. The word comes from the Greek word technetes, which means "artificial". Technetium was the first chemical element to be synthesized artificially. Subsequently, some isotopes of technetium were separated from the fission products of uranium, and many isotopes of technetium were also produced using the nuclear reactions of molybdenum, ruthenium, and niobium. Only very small amounts of Technetium-99 have been found in nature.
Technetium is a silver-gray metal with a melting point of 2172°C, a boiling point of 4877°C, and a density of 11.487 g/cm3. At high temperatures, technetium reacts with oxygen to form highly volatile Tc2O7, which is a light yellow solid. Another stable oxide is TcO2. The oxidation states of technetium are +1, +2, +3, +4, +5, +6, and +7, among which compounds with +4 and +7 valences are the most stable. 7-valent technetium exists in the form of TcO4- in the solution, has oxidizing properties, and can be reduced by divalent tin salts, concentrated hydrochloric acid, ascorbic acid, etc. In alkaline solution, TcO4- is easily reduced to. In neutral solution, a disproportionation reaction occurs:
Technetium 4 exists in the form of positive ions Tc4 in acidic solutions and in alkaline solutions.
Tons of technetium can be obtained through the separation of reactor fission products. Metals can be obtained by reducing technetium sulfide or ammonium pertechnetate with hydrogen at 500 to 600°C. Technetium-99 is the most widely used medical nuclide in clinical diagnosis of nuclear medicine and can be used for imaging diagnosis. Pertechnetate is a good corrosion inhibitor for steel.
In 1936-1937, it was first realized to produce it artificially. At the end of 1936, the young Italian physicist Sergel went to Berkeley in the United States for further study. He used an advanced cyclotron there to irradiate molybdenum with deuterons in order to obtain technetium. But it was a difficult task to separate the produced technetium from the molybdenum, so he took the irradiated molybdenum back to the University of Palermo in Italy. With the assistance of chemistry professor Perlier, he spent nearly half a year to isolate 10-10 grams of 99Tc isotope and determined that the properties of the new element were very similar to rhenium and less similar to manganese.
There are four known isotopes of technetium, all of which are radioactive. The longest half-life among them is 98Tc, 4.2×106 years. Technetium has now been produced in tons-level quantities and is extracted from the fission products of nuclear fuel. Technetium metal is silvery white, but usually obtained as gray powder. It resists oxidation and has little solubility in acid, so it can be used as an anti-corrosion material for atomic energy industrial equipment
Suzhou Technetium
The company is mainly engaged in diode manufacturing, packaging and testing. In 2005, it ranked fifth in the domestic discrete device industry. Among the top-ranked companies, only Suzhou Goodtech is a company specializing in diode manufacturing and packaging testing. The income of other companies includes a large amount of sales revenue from integrated circuits, transistors, and power tubes. The growth of discrete devices in the semiconductor industry is lower than that of integrated circuits, while the growth of diodes in discrete devices is relatively stable. Therefore, the company's business is too concentrated on diodes, which has affected the company's rapid growth in sales revenue in recent years.
The company's comprehensive gross profit margin reached 23 in 2003 and dropped to 18.7 in 2004. From the changes in the gross profit margin of the company's main products, we can see that it is mainly affected by the decline in gross profit margin of products such as shaft type, shaft type (VGS) and MB, and these three types of products accounted for 83.5% and 72.1% of the revenue in 2003 and 2004, respectively. .
The decrease in the gross profit margin of the main products is firstly affected by the decline in product prices, and secondly by the increase in the prices of raw materials such as copper and monocrystalline silicon. Among them, the prices of grains and wafers, the most important raw materials, were The average increases were 28.2 and 16.5 respectively.
Affected by the high gross profit margin of LLP (leadless packaging) products, the gross profit margin stopped falling in 2005 and increased in the first half of 2006.
The company is a professional company focusing on the manufacturing and sales of diodes. The advantage of professionalism is that it can do a good job and do it well. The disadvantage is that profitability is easily affected by the overall development of the diode industry.
In recent years, my country's semiconductor market and industry have developed very rapidly, far exceeding the global average. However, the two main sub-industries of semiconductors, integrated circuits and discrete devices, have different developments. The scale of discrete devices is relatively small, and the growth of integrated circuits is stronger than that of discrete devices. Taking 2005 as an example, the market size of discrete devices was only 17 times that of integrated circuits; the compound growth rate of discrete devices from 2001 to 2005 was 26.1, while the compound growth rate of integrated circuits was 35.0.
According to CCID’s prediction, the compound growth rate of my country’s integrated circuit output value will be more than 25 in the next few years, while the compound growth rate of discrete device output value will be approximately 19.
This difference is caused by the integration trend of the semiconductor industry. After long-term integration development, devices that are easy to integrate have been integrated, and the remaining devices that are not suitable for integration and are uneconomical after integration are left. in the discrete device industry. Discrete device products are mainly versatile and are slow to upgrade. Therefore, the development of discrete devices mainly increases with the increase in demand for downstream products. As my country is becoming a global manufacturing center, the demand for discrete devices is growing rapidly. Coupled with the transfer of manufacturing capabilities of foreign manufacturers, domestic growth is much higher than the international average.
The growth in the field of discrete devices is also mainly reflected in the growth of some new products such as optoelectronic devices and products with rapid upgrading such as power devices. The growth of diodes and transistors is relatively stable. From 2003 to 2005, the domestic diode market sales volume increased by 24.5, 37.1 and 10.1 respectively. In 2005, domestic diode sales were 7.73 billion yuan, accounting for 12% of the total discrete device market value. According to CCID's forecast, the compound growth rate of domestic diode demand from 2006 to 2010 is 14.1, and sales will reach 14.953 billion yuan by 2010.
At present, more than 90% of the company's sales revenue comes from exports, mainly Europe, America and Greater China (including Hong Kong, Taiwan and Southeast Asia). Europe and the United States are the main source areas of OEM customers; due to the Greater China region Due to the strong demand of the electronics processing industry, this region is also the company's traditional focus area for export sales; Japan and South Korea are also the company's key sales areas due to their important positions in the consumer electronics industry.
Since the RMB is currently in the process of appreciation, an excessive share of export sales will expose the company to greater exchange rate risks. At present, more than 90% of the company's revenue comes from export sales, and overseas procurement accounts for more than 60% of the total procurement. According to our calculations, the company's overseas purchases account for 40% of its overseas sales revenue. After offsetting this part, the company still has 54% of its sales revenue exposed to exchange rate risks. If the company does not take measures such as raising prices, every RMB 1 appreciation will reduce the company's profits by nearly 500,000 yuan per 100 million yuan in sales revenue.
In recent years, the company's OEM accounts for 40-50% of the company's sales revenue, a relatively high proportion. The company's current OEM customers include Vix General Semiconductor Corporation (VGS), Vix Semiconductor Austria GmbH (VSA), Nippon Shindengen Industries Co., Ltd. (SHD) and Nippon Inda Electronics Co., Ltd. (NIEC). The above-mentioned OEM customers are all Among the world's major semiconductor discrete device manufacturers, VGS and VSA are both wholly-owned subsidiaries of VIX Semiconductor (VSH), which is one of the world's largest discrete device manufacturers.
Although the company can increase its visibility, reduce sales expenses and market risks, and obtain relatively stable market demand by OEM for internationally renowned manufacturers, overall the gross profit margin of OEM products is lower than the company's overall gross profit margin. , the company is suspected of working for a large manufacturer.
Therefore, companies should strive to increase the proportion of private brands and domestic sales. However, competition in the domestic market is fierce. On the one hand, international brands occupy an important position; on the other hand, there are currently about 130 domestic manufacturers engaged in diode production, including well-known companies such as Changdian Technology, Huawei Electronics, Leshan Phoenix, and Shenzhen Saifa , Wuxi China Resources Huajing, and Tianjin Zhonghuan all have considerable strength in discrete devices. It is not easy for the company to expand domestic sales.
All the funds raised by the company will be used for the technological transformation project of the glass passivated super rectifier diode (GPP) production line and the technological transformation project of the Schottky diode (SKY) production line. The project will increase the proportion of mid-to-high-end products in the company's product structure, while also increasing chip self-sufficiency and reducing costs.
The main products of Dongliang New Material Company include electrostatic powder spraying for construction, fluorocarbon resin spraying, electrophoretic coating, stainless steel color-coated aluminum profiles, etc.
Both companies are average, and it is estimated that Suzhou Gutech will have a greater increase on its first day of listing.
Personally, I think it is better to subscribe to Golden Mantis.