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Iron Oxide Fe3O4 is an inorganic material with the chemical formula Fe3O4. The magnetic black crystal is called magnetic iron dioxide.

Iron Oxide Fe3O4 Powder Properties

Ferric oxide cannot be dissolved in organic solvents, such as ethanol, water, or alkali solutions. Natural ferroferric dioxide is insoluble when dissolved in acid. It is readily oxidized in humid air to iron oxide (Fe2O3).
The black Fe3O4 is an iron oxide with mixed valence, melting at 1597degC. It has a density of 5,18g/cm3. Fe3O4 Powder is insoluble with water but soluble with acid solutions. At room temperature, it appears as magnetite. It has a high conductivity and strong submagnetism.

Fe3O4 exhibits anti-corrosion properties. In the case of bluing steel parts, also known as baking blue and blue-burning, an alkaline oxidizing liquid is used to produce a blue-black Fe3O4 coating on the surface. Useful to improve corrosion resistance, aesthetics and gloss.

Iron Oxide Fe3O4 Powder Preparation

The main methods used to prepare nano-Fe3O4 are the hydrothermal method (solvothermal method), the microemulsification technique, and the sol-gel technique.

1. Precipitation methods
The precipitation process is widely used to prepare nanoparticles because it is easy, inexpensive, yields a high purity product, has a uniform composition, is suitable for mass production, and can be done at large scales. The most common precipitation methods are co-precipitation and hydrolytic precipitation. Ultrasonic precipitation is also used, as well as alkoxide hydrogenation and chelate breakdown.

2. Hydrothermal (solvothermal method)
The hydrothermal reaction (solvothermal reaction) is a term used to describe all chemical reactions which are carried out under high pressure and temperature in fluids, such as aqueous (organic) solvents or steam. The Fe3O4 obtained by the hydrothermal process has a particle size that is small and uniform, it does not need high-temperature pretreatment to calcinate, and it can be doped with multivalent ions.

3. Microemulsification method
The microemulsification technique is based on the formation of emulsions by two immiscible solutions under the influence of surfactants. In this method, amphiphilic molecule divides the medium into microreactors, where the reactants are able to react and form a solid. The microreactor limits the nucleation, growth of crystals, coalescence and agglomeration processes, resulting in nanoparticles which are covered with surfactant, have a condensed morphology and structure.

4. Sol-gel method
The method is based on the hydrolysis of metal alkoxides, followed by polymerization to produce a uniform sol containing metal oxides or hydroxides. They are then concentrated into a clear gel. The gel is dried, and then heat-treated in order to obtain superfine powder.

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Nano silver colloidal is a simple substance of metallic silver prepared with a particle size of 1-100nm. The particle size of nano-silver is mostly around 20 nanometers, and a few can reach below 5 nanometers. It has a broad-spectrum bactericidal effect, about 650 kinds of bacteria, and does not produce drug resistance.

The Property of Nano Silver Colloidal

1. Broad-spectrum antibacterial Nano-silver acts on the cell membrane protein, which can directly destroy the bacterial cell membrane and combine with oxygen metabolism enzyme (-SH), hinder the absorption of nutrients necessary for growth such as amino acids and uracil by bacteria and other microorganisms, thereby inhibiting their growth, and this unique effect Mechanism, it can kill most bacteria, fungi and other microorganisms.

2. Strong permeability
Nano silver particles have super permeability, can quickly penetrate 2mm under the skin to sterilize, and have a good sterilization effect on common bacteria, stubborn bacteria, drug-resistant bacteria and deep tissue infections caused by fungi.

3. Strong sterilization
Composed of silver and silicon, it can kill more than 650 kinds of bacteria in a few minutes. The complex quickly combines nano silver with the cell wall of bacteria to achieve a powerful bactericidal effect.

4. Durable antibacterial, washable
Nano-silver polymerizes with the textile surface to form a ring structure, so it is durable and washable.

5. Repeatability
Nano-silver acts on the cell membrane proteins, and after combining with the cell membrane and oxygen metabolism enzyme (-SH), the silver can be freed and used.

6. safe and non-toxic
As early as “Compendium of Materia Medica”, it is recorded that silver is raw and non-toxic; the US Public Health Service’s “Investigation Report on Silver Toxicity” in 1990 stated that: silver has no obvious side effects on humans; nano-silver is a topical drug with low silver content. It is the safest way of medication.

7. No resistance
Nano silver is a non-antibiotic bactericide, and its unique antibacterial mechanism can quickly and directly kill bacteria, causing them to lose their ability to reproduce. Therefore, the next generation can not be reproduced, and it can effectively avoid repeated attacks due to drug resistance.

The Application of Nano Silver Colloidal

Daily necessities:
Nano silver can be used for surface spraying of various textiles and paper products, soaps, facial masks and various scrubbing products.

Chemical building materials:
Nano silver can be added to water-based paints, paints, solid liquid paraffin, inks, various organic (inorganic) solvents, etc.

Medical and health:
Nano silver can be used in medical rubber tubes, medical gauze, women’s external antibacterial drugs and health products.

Ceramic products:
Nano silver antibacterial tableware, sanitary ware, etc. can be produced.

Plastic products:
Nano silver can be added to various plastic products such as PE, PP, PC, PET, ABS, etc. to achieve antibacterial function.

Tech Co., Ltd () is a professional nano silver colloidal with over 12 years experience in chemical products research and development. If you are looking for high quality nano silver colloidal, please feel free to contact us and send an inquiry.

Molybdenum is a main component in molybdenite. The powder is black and has a metallic sheen. The chemical name is MoS2, melting point is 1185degC. Density is 4.80g/cm (14.4degC) and Mohs Hardness is 1.01.5. Introduction on the benefits of molybdenum sulfide

1. Keep the production area clean, tidy and free of oil.
2. This can save you a lot of lubricants.
3. Reduce the workload of maintenance workers and improve the technical conditions.
4. Because of the low friction coefficient, molybdenum isothiodide has a small friction resistance, which allows for electricity savings. The brother unit can save 12% electricity. 5. It can improve attendance rates, reduce loss of equipment components, and extend the service lifetime of friction equipment.
6. The application of molybdenum diulfide lubrication resolves the technical problem and improves accuracy and efficiency.
7. Molybdenum diulfide is a filling and filling agent that can restore geometric dimensions to certain parts. This extends the life of the part.
8. Molybdenum diulfide exhibits the properties of being waterproof, resistant to alkali and acid, as well as moisture-proof.
9. Molded components using molybdenum-disulfide plastics or powder melting can save a great deal of nonferrous metals.
10. After removing the complex oil supply systems from some equipment that uses molybdenum diulfide, it will simplify the structure and improve the efficiency of the equipment.

Application of molybdenum sulfide

It is also capable of superconducting. It has unique electronic properties that are not found in graphene. Its applications are wide-ranging and include electronic communications (e.g., transistors, sensors), biomedicine, flexible manufacturing (including flexible screens), energy, and many others. ).

Due to their unique two-dimensional layered structure with atomic thickness and photoelectric characteristics, two-dimensional materials have gained much attention. Most representative are transition metal chalcogenides including molybdenum chalcogenide (MoS2) tungsten chalcogenide (WS2) molybdenum selenide WSe2 tungsten selenide WSe2 etc. because they possess visible light bandgap qualities that the first discovered material graphene did not possess.

It is very easy to break the van der Waals force that exists between the layers of two-dimensional materials. Two-dimensional materials are used in research to create lighter optoelectronic device by using two-dimensional material with a thinner thickness. Molybdenum Disulfide, with its multiple layers, is one of most studied two-dimensional material in the family of TMDCs. Its 2H phase also happens to be the most stable.

Compared with the traditional intercalator-assisted electrochemical method, the intercalator-assisted plasma liquid phase technology has fewer product defects and does not introduce additional groups. It can be peeled in a controlled fashion, enabling the production of high-quality materials. Promote the flexible use of two-dimensional material in optoelectronics as well as other fields and continue to improve optical-electronic device development.

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Nitinol This is a type of shape memory metal and it’s used in 3D printers. Shape memory alloys have a good plasticity and can be reformed to their original form at a given temperature.
Nitinol alloy is made up of two metals, titanium and nickel. The austenite phase, and the martensite, are different phases of crystallization due to temperature and mechanical stress changes. The nickel-titanium metal alloy has many other outstanding properties, including wear resistance and corrosion resistance. It also offers high damping, super elasticity, and super durability.

Nitinol Powder Performance

1. Shape memory
The material automatically returns to its mother phase when it undergoes a reverse phase transformation. It is true that the shape memory process is a thermally initiated phase transformation of Nitinol.

2.Superelasticity
Superelasticity is the phenomenon in which a sample under external force produces a larger strain than its elastic limit, but the strain can automatically be restored upon unloading. It is the case that, when the parent phase is in its state, due to stress applied, the martensitic transition occurs. This results in a different mechanical behavior than ordinary materials.

3. Sensitivity in the mouth to temperature changes
The temperature in the mouth cavity does not affect the correction force of CoCr alloy wire or stainless steel wire. The temperature in the oral cavity affects the corrective force of super-elastic nickel titanium alloy orthopedic wire.

4. Corrosion resistance
According to recent studies, the corrosion resistance between stainless steel and nickel-titanium is almost identical.

5. Anti-toxicity
This alloy is a nickel-titanium atomic alloy, which is composed of about 50% Nickel. Nickel has been known to be carcinogenic, causing cancer. In normal circumstances, titanium oxide on the surface acts as barrier. This makes Ni-Ti alloy biocompatible. TiXOy, TixNiOy, and TixNiOy are surface layers that can inhibit Ni release.

6. Corrective correction
Currently commercially used orthopedic wires include austenitic stainless steel wires, cobalt-chromium-nickel alloy wires, nickel-chromium alloy wires, Australian alloy wires, gold alloy wires and ss titanium alloy wires. Nitinol has the lowest unloading curve and flattest platform, which indicates that it is capable of providing the softest and most durable correction force.

7. Good shock absorption properties
The root and periodontal tissue is more damaged by the higher the vibration caused by the archwire. It was found through the results of several arch wire attenuation studies that the vibration amplitude for stainless steel wire is greater than that of super elastic Ni-Ti. The initial vibratory amplitude of Ni-Ti super-elastic arch wire is only half that of the stainless steel wire. The health of teeth is extremely important.

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What is Amorphous Boron Powder Boron Powder It is an amorphous element, with CAS no. 7440-42-8. The appearance of the powder is light brown or gray-black, with a melting point between 2300+-2 and 2550 L Hua, atomic weight 10.81, specific gravity 2,34-2,37. Is 7440-42-8. Appearance is a light brown to gray black invisible powder. Melting point is 2300+-2. Atomic weight is 10.81. L Hua Temperature is 2550. Specific Gravity is 2.34-2.37. Insoluble in water, hydrochloric, ethanol, or ether.

Amorphous Boron powder: Its Properties
On the periodic chart, boron occupies a unique place between metals. It has a large nuclear charge and is more reactive. It is extremely stable at normal room temperature. When heated above 300 degrees it will become oxidized and begin to smell when over 700 degrees. It can also interact at high temperatures with oxygen, nitrogen and sulfur. The Use of Applications Amorphous Boron Powder
Amorphous boron is commonly used in the metal smelting industry, electronic product manufacture, ceramic manufacturing and chemical industries. Amorphous Boron is used for the following specific purposes:
1. Amorphous Boron Pulp is a good non-metallic fuel for pyrotechnics. Amorphous boreon powder’s ignition temperature is reduced by a large amount due to the irregular shape and high specific surface area.
2. Amorphous Boron is also a key raw material used to produce high-purity boron halite and other boride products.
3. Amorphous Boron Powder, used to deoxidize metals at high temperatures, is a part of the Oxygen-free Copper Smelting Deoxidizer.
4. Amorphous Boron Powder may be used in alloy products and to improve metal properties.
5. Amorphous Boron Powder has more active chemical properties than crystalline boron. Crystalline Boron is very hard and is often used in place of diamond for cutting tools or drill bit.
6. Boron Amorphous powder can be used to assist in welding.
7. Amorphous Boron is a very important energy source. It can be used as solid fuel for composite solid propellants. The calorific values of boron are more than double those of carbon and aluminum, as well as more than two times those of magnesium. It has a calorific volume that is three times greater than that of hydrocarbon fuel and is about twice as dense. Energy-wise, boron is the best nonmetallic fuel. The irregular shape of amorphous boran and its large specific surface area also reduces the ignition temperature. ;
As an additive to high-temperature steelmaking high magnesia furnaces, boron powder is used.

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