Scientific News Boron Nitride Graphene Mixture May Be Suitable For Next-Generation Green Cars

Scientific community has long been fascinated by boron nitride due to its unique properties: sturdy, ultra-thin transparent, insulating and lightweight. The boron is a material that can be used by a wide range of researchers.
According to researchers at Rice University a graphene film separated by boron nanotube columns could be used as a material for storing fuel hydrogen in automobiles.

The Department of Energy is setting the standard in storage materials to make hydrogen fuel a practical option for light vehicles. A new computational study by materials scientist Rouzbeh Sharsavari of Rice Lab has determined that pillared Boron Nitride and Graphene may be suitable candidates.

Shahsavari’s laboratory determined the elastic and columnar graphene structures by computer simulation, and then processed the boron nanotubes to create a mixture that simulated a unique 3-dimensional structure. (A sample boron nanotubes seamlessly bound to graphene is prepared.

As the pillars between the floors of a building provide space for people, so do the pillars within the graphene boron-nitride. The goal is to keep them inside and then exit when needed.

The researchers discovered that the pillared graphene and pillared Boron Nitride graphene have a high surface area (approximately 2,547 sq. m. per square meter) as well as good recyclability in ambient conditions. Their model shows adding lithium or hydrogen to the material improves its ability to combine with hydrogen.

They concentrated their simulations on a four-variant structure: a graphene boronnitride doped with lithium or oxygen.

The best graphene at room temperature was oxygen-doped boron oxide graphene. This graphene weighs 11.6% (by weight) and has a volume of 60 g/L.

The material's hydrogen weight was 14.77% in cold weather at -321 Fahrenheit.

The current US Department of Energy economic storage media goal is to store more hydrogen than 5.5% in weight and 40 grams of hydrogen per liter under moderate conditions. The ultimate target is 7.5% weight and 70 gram per liter.

Shahsavari explained that the hydrogen atoms adsorb on the undoped pillared Boron Nitride Graphene due to a weak van der Waals force. When the material has been doped with oxygen the atoms are strongly bound to the mixture. This produces a surface which is better for hydrogen.

"Because the nature of charge and interaction, adding oxygen to the substratum gives us a strong bond," said he. "Oxygen, and hydrogen have been known to share a strong chemical affinity."

Shahsavari explained that the polarization characteristics of boron Nitride combined with graphene as well as the electron mobility in graphene themselves make the material highly adaptable to applications.

Shahsavari explains that "we are looking for the best point" which describes ideal conditions such as the balance between weight and surface area, operating temperature, and pressure. "This is only possible through computational modeling as we can test a lot of changes very quickly. In just a couple of days, the experimenter is able to finish the work that would normally take months.

He said these structures are strong enough to easily surpass the requirements of Department of Energy. The hydrogen fuel tank, for example, can withstand up to 1,500 charging and discharging cycles.

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Knowing the interesting chemical elements boron B comes from afar

Boron has been a major name in the world of chemistry. There have been two Nobel Prizes in Chemistry for the work done on boron.

There are a few heat-resistant products on the market that have added boric acids to common glass. This means the glass will not expand or contract easily after joining.

Diamond is the hardest substance known to man. However, recent theories suggest wurtzite, an alternate form of boron, may actually be more hard than diamond. But these crystals haven't been synthesized.

Boron compounds have a number of interesting properties. They play a crucial role in polymer crosslinking, which gives plasticine a remarkable ability. It is soft and malleable when held in your hands but becomes hard and elastic if you throw it at a wall.

Boric acid is a compound that contains boron and it's often used as a medicine or to kill insects. Boric Acid can be used in chemistry labs to disinfect eyes.
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Newly 3000°C Ablative Ceramic Coating Successfully Developed - Multi-boron-containing Single-phase Carbide

Boron carbide, alias black diamond, has a molecular formula of B4C, usually grayish black powder. It is one of the three hardest known materials (the other two are diamond, cubic boron nitride), used in tank armor, body armor and many industrial applications. It has a Mohs hardness of 9.3. The team of the Academician Huang Boyun of the National Laboratory of Powder Metallurgy of Central South University has developed a new type of ceramic coating resistant to 3000 degC ablation and its composite materials through a large number of experiments. This discovery may pave the way for the development of hypersonic vehicles.

Professor Xiong Xiang from the Institute of Powder Metallurgy, Central South University, said that hypersonic flight means that its flight speed is equal to or greater than 5 times the speed of sound, that is, at least 6,120 kilometers per hour. At such a high speed, the flight from Beijing to New York can be completed within 2 hours, provided that the key structural components of the aircraft can withstand severe air friction and hot air impact of up to 2000-3000 deg C without being damaged. . The newly discovered ultra-high temperature ceramic coatings and composite materials from Central South University provide better protection for the above components. It is reported that this is the world's first synthesis of this quaternary boron-containing carbide single-phase ultra-high temperature ceramic material, and made into a coating, perfect "fusion" with carbon-carbon materials. In the current field of new materials, the mainstream is the study of mixed materials in binary compound systems. Therefore, its successful development will greatly promote the application of quaternary system materials in the field of hypersonic.

The novel ceramic coating modified carbon/carbon composite material is composed of quaternary boron-containing single-phase carbide composed of zirconium, titanium, carbon and boron elements, and has a stable carbide crystal structure. It is mainly obtained by introducing a multi-ceramic phase into a porous carbon/carbon composite by an infiltration process. The ultra-high temperature ceramic combines the high temperature adaptability of carbides with the anti-oxidation properties of borides, which makes the coatings and composites exhibit superior ablation resistance and thermal shock resistance. In addition to withstanding the ultra-high temperature test of 3000 degC, the ceramic oxide has a low oxygen diffusion rate, high-temperature self-healing ability, ceramic coating dense and gradient structure, which also makes the ceramic exhibit a lower material than other ceramic systems. Ablation loss rate.

"Because this ultra-high temperature ceramic combines the high temperature adaptability of carbides with the anti-oxidation properties of boride, the above coatings and composites exhibit superior ablation resistance and thermal shock resistance, which is the key to hypersonic vehicles. The promising candidates for the parts," said Xiong Xiang.

The research results of the team research and development were published on June 15th in Nature Communications. The State Key Laboratory of Powder Metallurgy of Central South University is the first completion unit of the thesis. Professor Xiong Xiang is the first correspondent and Zeng Yi. The doctor is the first author. The partner unit, the University of Manchester, UK, characterized and analyzed the material.

Once published, the article has received extensive attention from foreign academic circles and the media. In the first three days after the publication, the download volume exceeded 5,000 times, while the other articles published on the same day were downloaded 300-900 times. The British "Daily Mail", "The Economist", the United States "Yahoo", "Public Machinery", Russia's "Satellite News Agency" and other dozens of mainstream media and authoritative academic institutions in the world have given extensive attention and coverage of this research. . According to the reviewer of Nature Newsletter, "The above research results will ignite the academic enthusiasm and interest in the application of quaternary system materials in the hypersonic field, because this represents a very promising material system."

Since 2002, with the support of the National 863, 973 and the National Natural Science Foundation, under the leadership of Professor Chang Xiang, a scholar from the Yangtze River, the team started with a medium-high temperature (<1600 degC) anti-oxidation coating of carbon/carbon composites. Look for a new ultra-high temperature ceramic coating material with excellent oxidation resistance and ablation resistance. In the course of the research, the material system screened from the initial silicon carbide to the subsequent strontium carbide, titanium carbide, zirconium carbide, zirconium boride, tantalum carbide and other dozens of systems and hundreds of high-temperature materials, almost involved All existing ultra-high temperature ceramics and high temperature composites. Up to now, the breakthrough in the development of new ablation-resistant ceramic coatings at 3000 degC ultra-high temperature environment has been achieved, which lasted for 15 years.

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Compound Name TiH2 Powder Titanium Hydride Application For Welding And Catalysts

The titanium hydride used in powder metallurgy and metal-ceramic sealing is also used to provide titanium for the alloy powder.

Titanium Hydride is very fragile and can be used for powdered titanium. The hydride is also used to weld. Thermal decomposition of titanium hydride precipitates new, ecological hydrogen and Titanium metal. This increases the strength and promotes welding.

PNNL's collaborators and PNNL discovered a method to get around this issue six years in advance. They additionally developed a low cost way of supplying material at a commercial scale. Instead of starting with molten Titanium, the team substituted titanium-hydride (TiH2) Powder.

In the last few years, another BE PM-Ti approach has been developed that allows for the production of BE components which are almost poreless at one time. This method uses vacuum sintering titanium hydride (TiH2) instead of Ti-steel powder. TiH2 powders will dehydrogenate during the entire sintering process at mild temperatures, before being sintered under vacuum at high temperature.

Current implant requirements include biocompatibility and bone-like mechanical properties. Porous Titanium can meet these needs if enough porosity is obtained, as well as large pores and interconnections that allow bone to grow. Porous components are created from TiH2 based feedstocks with space holders.

Tech Co., Ltd., a leading manufacturer of titanium hydroide (TiH2), has over 12 year experience in chemical product development and research. You can contact us by sending an inquiry if you are interested in high quality titanium hydroide (TiH2).

What metal can withstand higher temperatures than tungsten

What metal is more resistant to heat than tungsten?

The melting point for tungsten, which is 3,422 degrees (boiling temperature 5,930 degrees), is the highest of all metal elements on the periodic table. No metal element is higher in melting point than the tungsten.

Tungsten is element number 74 in the VIB Group of Period 6. Each atom has the ability to form six metal bond.

There are elements that can be heated higher than tungsten. Solid carbon can reach temperatures as high as 3,627 degrees c. However, carbon does not have a fixed melting temperature (one atmosphere), because it sublimates between 3627 and 4330 degrees c.

Ta4HfC5, a material with a 4215-degree melting point, is currently the heat resistant material that has been manufactured by humans. The alloy is composed of tantalum carbide and hafnium carbide (melting point 4215), which melts at a temperature higher than that of tungsten.

The melting point of a material is dependent on its pressure. When pressure and temperature are higher than critical, however, the material will become superfluid, losing its melting point.
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Nano silver substitution trend is irreversible

Nanowires to replace infrared first
Due to the rapid growth of the display industry, as well the scarcity of indium, and the high processing costs of ITO films, industry leaders have been searching for alternatives, such as nanowires. Silver nanowires, among other alternatives, are the most advantageous due to their technology and maturity. Additionally, they are flexible and can be used to replace other materials that conduct electricity with flexible displays of east winds.

Nanosilver has the most important role in Nanosilver. Nanosilver has the best antibacterial properties.

"With the present process, silver nanowires are first to be used on a large scale as an alternative for infrared touchscreen technology. Du said, ""The substitute is already obvious." "The large-size products made of silver nanowires are gaining customers' recognition.

Infrared is the main touch control technology used in electronic whiteboards. Infrared transmitter tube and receiving tube is arranged on the raised border so that infrared optical networks are formed.

The next major flashpoint will be 2020

The global smartphone market, with its huge population, has begun to slow. However, the small and mid-sized markets, due to their large base of users, are also vital for silver nanowires technology to become mainstream.

"The smartphone industry needs revolutionary innovation, whether it's facial recognition, the full screen or the hot AI feature," du said. Du said, "The smartphone industry requires revolutionary innovation, whether it is facial recognition, a full-screen, or AI.

The last step to breaking through the nanowire

The technology of silver microwires is not widely used. The production, manufacture, storage, and patent of the silver nanowires is considered to be an important factor that limits their development.

It is not possible to replace ITO films with silver nanowires. The future holds the biggest potential for completely new applications.

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Molybdenum disulfide nanoelectromechanical system ultra-thin ultra-small ultra-low power consumption

Graphene, a typical material with two dimensions, is widely used and highly sought-after by scientists and the industry. What exactly is a 2-dimensional material? Simple, two-dimensional material is a non-nanoscale (between 1 and 100 nm) material in which electrons are able to move freely in two directions (planar movement). Examples of such materials include: graphene; boron nitride; transition metal compounds (disulfide); Molybdenum; tungsten diulfide, disilicide; black phosphorus.
2D materials can be used in a variety of fields. Taking into account the introductions made by the authors, we can list the following examples: printed electronics, flexible electronic, microelectronics (including memory), processors, hyperlenses and terahertz. , quantum dots, sensors, semiconductor manufacturing, NFC, medical, etc.


Molybdenum diulfide, also known as MoS2, is a typical 2-dimensional material that deserves our attention. Molybdenum diulfide, which is composed of two atoms of molybdenum with one atom of sulfur, has only three atoms of thickness. The graphene thickness is nearly the same as molybdenum, but graphene has no band gap. In this context, the author has previously revealed that the US Department of Energy Berkeley Lab research team accurately measured band gap of semiconductor two-dimensional molybdenum-disulfide material (MoS2). It also revealed powerful The tuning mechanisms and relationship between electronic and optical properties of a 2-dimensional material.


In addition, the molybdenum diulfide has an electron mobility that is 100 cm2 /vs. (ie. 100 electrons per centimeter square per volt), although it's much lower than crystal. The silicon has an electron migration rate of about 1400 cm2/vs. However, it is better than amorphous silica and other ultra thin semiconductors.

Molybdenum diulfide, with its excellent semiconductor properties, small size, ultra thin, and softness, is especially suitable for transistors, flexible electronic, LEDs lasers, solar cells.

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Tungsten Oxide Insulation Material Can Make The Sun Room Cool in Winter and Cool in Summer

What is tungsten Oxide?Tungsten dioxide has the molecular formula WO3 with a weight of 2318.5.
It is a form of tungsticanhydride. Tungsten dioxide is not produced in industrial production. The tungsten-trioxide salts are classified according to their content in tungsten.
Tungsten Trioxide is a powdery pale yellow triclinic crystal. Once the temperature reaches 740 deg C it changes into an orange tetragonal crystalline. In air, it is stable, with a melting point of 1473 deg C and a boiling point higher than 1750.
Tungsten Trioxide is one of the most stable tungsten oxydes. It is not soluble in water or inorganic acids except hydrofluoric. It is soluble with hot sodium hydroxide solution, ammonia and ammonia in order to form soluble-tungstate. If the temperature is greater than 650 deg C it can reduce by H2, but at 1000-1100 C it can be further reduced by C to get tungsten.

The application of tungsten dioxide transparent insulation material
Smart homes make home life safer, more comfortable and more convenient. The smart home also saves energy and is environmentally friendly. So, it's not surprising to see the smart sunroom. One of these is the so-called "intelligence", which breaks the sun room into two parts: summer, like a fire stove and winter, like a refrigerator. Transparent semiconductor materials like tungsten oxide transparent materials are a good way to make the sunroom cool in the summer and warm in the winter. My opinion is that it's not necessary to install floor heating and air conditioning equipment. The best solution to heat insulation in the sunroom is to start at the roots.

This concept of smart homes has already permeated our minds and is being applied everywhere! Unfortunately, this author hasn't been able live an intelligent lifestyle. This led to the classic home scene: the author would go out and come back halfway. Then, she'd remember something, did I lock my door? Is your air conditioner turned off? You cannot survive the day if you do not go back to confirm. But go back, and you'll be late to work! What about changing to the smart home scenario? ----After you lock the front door, turn the scene to unmanned, shut off the power of the terminal blocks, and check the status from the app at any time. It is easy to use, and it makes people feel more at ease.
The switch to the smart room is a similar experience. Some sunrooms are now using Low-e glasses. Researchers tested the blocking of ultraviolet rays and near-infrared radiation by glass coated with nano-tungsten dioxide coating, Low e glass, glasses with heat-insulating films, hollow tempered and single-sided glass. The glass coated with nano-tungsten dioxide has an infrared blockage rate of 91%. 2. Low-e glass has an infrared blocking percentage of 62.8% and a UV blocking percentage of 56%. 3. The infrared blocking percentage of glass with heat-insulating films is 59%, while the ultraviolet blocking percentage is 99.7%. 4. Hollow tempered glasses have an infrared-blocking rate of 34.2%, and an ultraviolet-blocking rate of 23.5%. 5. The infrared blocking percentage of single-sided glasses is 12.4%, and the ultraviolet blocking is 13.5%.

As can be seen by the data, single-sided tempered glass with nano tungsten oxide coating has the best infrared blocking ability. Single-sided tempered glass with thermal film and nano tungsten oxide have the best ultraviolet blocking ability. Coated single-sided glass. However, industry insiders say that because UV light has a bactericidal effect, and most people need to take pictures of the sun to function properly, it's not good to have high UV blocking. It is well-known that solar radiation supplies energy to all human activities on Earth. The amount of infrared, ultraviolet, and other rays that are present in sunlight is important. In general, the scientifically-recommended permeability rate is around 10%. In terms of health and energy savings, using nano-tungsten oxide-coated insulating glass makes the most sense.

It is clear that tungsten oxide is a transparent insulation material with two issues to solve urgently when building energy-saving windows: Transparency is defined as the ability to transmit light. It also meets lighting requirements. High barrier for the near infrared. This reduces energy consumption by blocking the radiant sun's energy.
The tungsten-oxide transparent heat insulating film is an environmentally friendly, water-based material that can be painted to a thickness as low as a few nanometers. This allows it to have the "warm winter, cool summer" effect without the need for air conditioning. The tungsten oxide transparent heat insulating material is also a great option for insulation. . These materials include tungsten bronze as well as ITO, ATO FTO.
Tungsten-oxide insulation is not an "black technology", it is the result of technological and scientific development. According to the author, in today's advocacy for "energy conservation and emission reduction" as well as "taking a path towards sustainable development", these transparent insulation materials will receive more and greater attention.

Tech Co., Ltd., a professional tungsten-oxide manufacturer, has over 12 years of experience in chemical research and product development. Contact us if you need high-quality tungsten oxide. Send a request .

High Purity 3D Printing Nickel Alloy IN718 Powder

In718 Powder is widely used for industrial and aviation turbo-propellers, petrochemical, nuclear reactors, and laser cladding.Particle Size: 15-45mm; 15-53mm; 53-120mm and 53-150mm

High Purity Germanium Sulfide GeS2 Powder CAS 12025-34-2, 99.99%

Germanium Sulfide (GeS2) is a semiconductor compound with the chemical Formula GeS2. It is easily soluble when heated alkali is used, but not in water.Particle size: 100mesh
Purity: 99.99%

Metal Alloy 18.5g/cm3 Polished Tungsten Heavy Alloy Plate

Tungsten alloy heavy plate has low thermal expansion. It is also known for its high density, high radiation absorption, and high electrical and thermal conductivity. It is used widely in the aerospace and medical industries.

Metal Alloy 8.92g/Cm3 High Purity Polished Copper Plate

Copper products exhibit good electrical conductivity as well as thermal conductivity. They are also ductile, resistant to corrosion, and have a high wear resistance. They are widely used by the electricity, electronics and energy industries.