Tungsten Research Papers

The melting point of Gallium is about 85 degrees fahrenheit, just above average room temperature. its unique melting point allows it to melt in one's hand, then re-solidify when removed. Gallium more than likely will supercool below its freezing point. It is one of the metals, like mercury, that is able to be liquid at room temperature, and therefore be used in metal-in-glass high-temperature thermometers. Unlike mercury though, it has a low vapor pressure at high

Being a bit of a trickster, Wollaston advertised the properties of this new element before putting it up for sale, but didn't reveal any other information. When another chemist,

In 1781, Carl Wilhelm Scheele discovered Tungsten, which is also known as Wolfram. The word Tungsten is used in the United States, but Wolfram is still used in some European countries. Tungsten comes from the Swedish language which means “heavy stone”. Tungsten is a very strong, shiny, gray-white metal that makes up just a tiny fraction of the earth’s crust and is always combined with other elements as compounds. Every tungsten atom has 74 positively charged protons in the nucleus which means it also has 74 negatively charged electrons revolving around the nucleus. Tungsten played a big role in the background of World War II. Portugal was the main source of this element which meant, they were put under pressure by both sides because of

The purpose of this lab was to identify unknown substances using density. We had three unknown substances; a yellow liquid and two metal rods. For each substance we measured volume using the water displacement method in a graduated cylinder and mass using a triple beam balance. Then we calculated density using the formula density (g/cm3)= mass (g)/volume (cm3). The data we collected in the lab is in the table below. After comparing our data with the density chart we were able to determine the identities of the substances. The liquid was cooking oil and the rods 1 and 2 were copper and aluminium, respectively. In conclusion, density - a characteristic property- is important because even though many substances may look the same but have different

The light bulb was invented in 1879 by Thomas Edison. The light bulb was incandescent which had a filament and metal wires. The light bulb is powered by the filament which sends the electrical current to the bulb. The light bulb converts electricity into heat which makes the filament get very hot so it glows, thus producing light. These light bulbs were very inefficient because only 3% of the energy that went into the incandescent

I’m seventeen years old and i’m a senior attending Weslaco East High School. Some interests i love doing is playing sports. Growing up I came from a very outgoing family, we usually played outside or went camping.

When you pick a protective welding cap, you need to manage the issues that in actuality depend upon:

It is necessary to identify the identity of two unknown metals. This is important because a metal scrap yard must know the identities of the metals before they can be recycled. It is also necessary to know what each metal is if a building is to be made using one or more of these metals. Identifying the metals will be done using intensive properties. Intensive properties do not depend on the amount of material present. Density is an intensive property found with the formula D=m/v. Which is defined as mass divided by volume to find the density.

The following picture shows the CVD growth for WS2. The yield is not very High like MoS2, it is only on the center sample and triangle size up to 80um. To improve the growth, we need to reduce the sulfur flux, and increase the Tungsten trioxide (WO3) flux by changing temperature or quantities. Also, we should increase the growth time.

WD-40 was invented in 1953 by the Rocket Chemical Company. It stands for, “Water Displacement on the 40th try.” It was originally used to prevent rust and corrosion on Atlas missiles, but was soon found to have other beneficial uses around the home. Today it is used around the world to lubricate moving parts and protect against rust. It has also been used for many, less conventional purposes, such as to remove decals and stickers from car windows and bumpers, break in baseball mitts, and remove coffee stains from nearly all surfaces.

One of titanium’s most important uses is in aerospace technology used by the United States Air Force. Titanium is very beneficial because it is corrosion resistant, has a high strength to density ratio, resists fatigue and racking, and is temperature resistant. Because of these properties titanium has many applications for the Air Force. In aircraft titanium is crucial to engine parts because it can handle high temperatures and stress. It is used in modern aircraft, such as the F-22 raptor, and was one of the key components in the record holding SR-71 Blackbird. Because of its low weight and heat resistance titanium is also used in spacecraft and ballistic, air-to-air and air-to-ground missiles. Since titanium has roughly the same weight as aluminum and the strength or iron it has many armor applications. The most noticeable for the US Air Force is in the “bathtub” like shell that protects the pilot of the A-10. Titanium is invaluable to the US Air Force; titanium and its alloys have numerous applications in modern aerospace technology, have been used in some of the most influential and important Air Force missions, and have the potential for future applications that could once again result in a drastic shift in aerospace

(1) However, many uses for lanthanum have been developed that have had a great impact on society. According to Emsley, although there are no commercial uses for pure lanthanum metal, there are many for its alloys. That of lanthanum and nickel (LaNi5) for example, is extremely good at absorbing hydrogen gas. As a powder, it can absorb as much as 400 times its own volume and is being investigated as a storage system for hydrogen. Lanthanum is also the core material in carbon-arc electrodes for film and photographic studio lights and for floodlighting. Lanthanum Oxide is added to the glass for making lenses because it improves its refractive index, and lanthanum salts are included in the zeolite catalysts used in petroleum refining because they stabilize at high temperatures. In medical circles, a new treatment of kidney dysfunction is with lanthanum in the form of carbonate, which, when ingested, bonds to phosphate so strongly that it cannot be absorbed from the

Tungsten, formerly Wolfram or Wolframite, is not naturally found in nature, and can only be created by taking either protons or neutrons from naturally occurring substances. In the sixteenth century, German smelters discovered it as an accompanying mineral to tin ores. When trying to smelt these ores, they sometimes found foam like deposits would form, consuming the tin ores they found valuable. Due to this phenomenon, it was said that it “Tears away the tin and devours it like a wolf devours sheep.” and labeled somewhat of a nuisance material. The name wolfram was also due to the substances black color and its hairy appearance. A century and a half later it would be given the name Tungsten after another tungsten ore called

Tungsten, also known as wolfram, is a chemical element with symbol W and atomic number 74. The word tungsten comes from the Swedish language tung sten, which directly translates to heavy stone. Its name in Swedish is volfram, however, in order to distinguish it from scheelite, which in Swedish is alternatively named tungsten.

GMAW (Gas Metal Arc Welding) is more economic; Springer reports that “ GMAW is an economic process because it has higher speeds and higher deposition rates than manual arc welding. There is also no need to constantly change electrodes” ( Page 11). GMAW has a higher speed, which means that you can get the job done faster. It also has high deposition rates which makes the weld look clean and smooth.” This method can be used for a high range of work, but it is not suited for repair work because of it’s weld quality” (Page 4). This process can be used for many variations of work including root welds, joints, T’s, butts, laps, and many more applications. Even though its used for many practices, it is not recommended to use this method for