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Four common metal conductive powders

Conductive materials can conduct current well because they have a large number of charged particles that can move freely under the action of an electric field, including conductor and superconducting materials.

The following are the four most widely used metal conductive materials.

Pure silver conductive powder (Ag99.99%)

1) Flake:

Common available particle size: <1um, 1-3um, 3-5um, 5-8um, 8-10um, particle size, and apparent density can be customized according to requirements. Flake silver powder with low apparent is available.

Appearance: silver gray with metallic luster

Application: Flake silver powder is a high-performance conductive filler material with good oxidation resistance. Flake Ag particle is the main raw material for making conductive coatings, membrane switches, conductive inks, conductive rubber, conductive plastics, and conductive ceramics.

Flake Ag powder is an ideal raw material for good low-temperature polymer slurry, conductive paint and electromagnetic shielding paint. The coating prepared with flake silver powder has good fluidity, anti-settling and large spray area.

2) Spherical silver conductive powder:

Common particle size: <1um, 1-3um, 3-5um，5-8um，etc

Application: Near-spherical silver powder is mainly used as conductive filler for high-temperature sintered conductive paste.

There is no absolute standard for silver powder as a conductive filler. The choice of silver powder should be based on the corresponding adhesive, the target conductor material, the physical and chemical properties of the film, and the reliability requirements.

 

Silver coated copper conductive powder (common particle size is 1-3um, 3-5um, 5-8um, 10um, Ag content ranges from 3%-35%)

Features:

1) Silver coated copper powder has adjustable superfine particle size.

2) Ag coated Cu powder has several shapes, such as spherical, flake, dendritic, etc.

3) Silver-coated copper powder has excellent conductivity and lower cost, which can replace some applications of pure silver powder.

4) Silver-coated copper powder has good oxidation resistance and dispersion, and can be used in medium and low temperature slurry.

Application range: It can be widely used in conductive adhesives, conductive coatings, polymer pastes, and various industries that require electrical conductivity and static electricity, electromagnetic shielding, and surface metallization of non-conductive materials.

Silver-coated copper powder can be widely used in conductive adhesives, conductive coatings, polymer pastes, and various fields of microelectronics technology that need to conduct electricity and static electricity, and non-conductive materials surface metallization. It is a new type conductive composite powder. Ag-Cu powder is widely used in the fields of electrical conductivity and electromagnetic shielding in various industries such as electronics, electromechanics, communications, printing, aerospace, and military industries, such as computers, mobile phones, integrated circuits, various electrical appliances, electronic medical equipment, electronic instruments, etc., so that products are not interfered by electromagnetic waves, while reducing the harm caused by electromagnetic radiation to the human body, as well as the conductivity of colloids, circuit boards, and other insulators, to make the insulated object have good electrical conductivity.

 

Pure copper powder (Cu 99%+)

Common particle size: <1um, 1-3um, 3-5um, 5-8um, etc.

Features: spherical and flake shape, uniform particle size, good dispersion, high crystallinity

Applications: Manufacture of terminals and internal electrodes of multilayer ceramic capacitors(MLCC), electronic components and electronic pastes, etc.

Pure nickel powder (Ni 99.7%): Common particle size: 1-3um

As a functional conductive filler, nickel powder can be added in coatings, adhesives, inks, plastics, rubbers, and can be made into conductive, electromagnetic shielding, anti-static  products, to be used in electronics, electromechanics, communications, printing, aerospace, weapons and other industrial sectors in the field of electrical conductivity. Such as computers, mobile phones, electronic medical equipment, electronic instruments and meters.

Guangzhou Hongwu Material Technology Co., Ltd. supplies the conductive materials mentioned above, with reliable high and stable quality, reasonable prices and excellent customized service.

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The History Of Static Electricity

History

People have dealt with and managed the problems of static electricity for hundreds of years.For example, at the beginning of the fifteenth Century, military fortress, static control program implemented in the treatment of black powder to prevent ignition from electrostatic discharge (ESD). In early 1860, Vin Mills in the American use grounding and flame ionization techniques to eliminate static electricity steel tube and paper in the drying process of network. When American Navy sent the first nuclear submarine in the 50’s of the last century in the Arctic, typical of the antistatic agent used to reduce electrostatic influence to navigation equipment. Over the years, as electronic devices become smaller, faster, therefore, more vulnerable to the destructive effect of static electricity. In order to ensure the normal operation of electrical equipment to the electrostatic, Navy needs some form of control. Because the navy task, static control and increasing awareness of the whole world. Then, static control, industrial development, products and equipment control of electrostatic and electrostatic discharge.

Definitions

According to Grolier’s encyclopedia, Static Electricity is electricity at rest or the accumulation of electric charge, as opposed to an electric current which is the movement of electricity. The flow or movement of people and/or materials in and through the environment causes separation and therefore static electricity. A familiar example is when a person walks across a carpeted floor. Static Electricity is generated simply by the contact and separation of the soles of shoes from the carpeted floor. ESD occurs when the electrostatic charge is transferred from a material that carries the charge to an electrostatic sensitive device. In the example above this ESD is the shock felt after walking across the carpeted floor and then touching a door knob. It is this ESD, which comes in varying degrees, that can be most damaging to electrical devices and other industrial, commercial and consumer products.

Examples

Static Electricity, a natural phenomenon, and consequently ESD are the primary causes of multiple number of problems affecting industry, business and personal life. These problems can be as simple as the shock resulting from walking across a carpet; as costly as the destruction of sensitive electronic components or jamming of machinery; and as dangerous as the ignition of combustible vapors, powders or dust. Typical problems caused by static;

Attraction of dust, dirt and bacteria to all environmental surfaces, as well as to products and product packages Damage or destruction of sensitive electronic components and sub-assemblies during manufacture, testing, packaging, shipping or receiving.

Computer and electronic office equipment data errors memory loss, system failures and other glitches.

Charge generation on surfaces of tote boxes and carriers used to process and store electronic components can create a potential for discharge. Jamming or slipping of paper, plastics or other material during printing, packaging or converting. Ignition of combustible vapors, dust or solvents causing fire or explosion. Irregularities caused by static in high quality printing, heat sealing, silk screening, lamination and other applications.

Work benches and production surfaces in electronic manufacturing and repair facilities will triboelectric charge components, assemblies, or their handling containers in contact and separation with a surface thereby creating a discharge

FACTS

1. Almost any material can generate static electricity. The ability to store or dissipate the charge depends on the type of material

2. Static can cause damage to sensitive devices resulting in instant failure. In contrast, static damage can also go undetected for a period of times resulting in product failure once the product is in service.

3. Electrostatic fields are associated with charged objects

4. The degree of severity of ESD events is contingent upon the type of discharge which occurs.

Electrical Characteristics of Materials

In order to understand how to control the generation of static electricity and the prevention of ESD, one must know the different electrical characteristics of materials that can generate static electricity. There are four varying degrees of electrical resistance.

Conductive Silver Powders allows a charge to flow across or through its volume easily. Surface Resistivity < 106 ohms/sq The miracle of the products have been provide solutions for static control in the past 20 years in India.Our high quality products to help prevent the electrostatic discharge damage sensitive electronic components.Our products include electrostatic prevention personnel grounding, anti-static work surface, anti-static packaging.

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Carbon Nanotubes Are Invisible Barricade

You know that carbon nanotubes are very small and very strong, they do a lot of things almost perfect material. The increase in material science, this technique will allow us to build lighter vehicles that get better gas mileage, the stronger the aircraft structure, more powerful, and all other all.Indeed, our intranet style think tank often discusses Carbon Nanotubes, graphene coatings, and other high-tech materials which are just now hitting the scene. Of course, we are most interested in commercial applications.

Now then, let me tell you about a concept I recently came up with; carbon nanotube road blocks to be used in areas like Afghanistan where we are fighting insurgents. We can build a system which raises and lowers these road blocks so our convoys can get through. If we find insurgents are moving in the middle of the night, perhaps to plant roadside bombs merely leave the roadblocks down and in place. Since we can make these carbon Nanotubes very strong, very thin, you wouldn’t be able to see them as you approached.

Instead, you could have many strings of carbon nano tubes, perhaps only 100 Nanotubes thick, not much wider than a very thin fishing line across the road. The only difference is these fishing lines, would be 250 times stronger than steel. And if you thought the insurgents would most likely be coming on a motorcycle, you could put them across the road at about neck height. These carbon nanotubes would not only stop vehicles, they would cut right through them and make them unable to drive. Indeed they would cut through flesh like it wasn’t even there, shesh – I can hear the angry insurgents now; “that’s not fair!”

Remember, in this case we are dealing with terrorists, members of Al Qaeda, insurgents, or the Taliban and which are hellbent on killing US and NATO troops. And they love to plant their roadside bombs late at night. Of course, if we set up these carbon nano-tube roadblocks, they certainly wouldn’t be able to do that now would they? Please consider all this.Lance Winslow is the Founder of the Online Think Tank, a diverse group of achievers, experts, innovators, entrepreneurs, thinkers, futurists, academics, dreamers, leaders, and general all around brilliant minds.

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Applications Fields of Copper Nanoparticles

Copper nanoparticles in different particle size are purple or black. There are no other colors mixed. They have spherical shapes and no obvious agglomeration. Copper nanoparticles have large specific surface area and a number of surface active centers. It is the excellent metallurgical and petrochemical catalyst. The nano-copper powder can be used for the conductive paste. 100 nano copper powder (FCu) producing by this method and dubbed the copper electronic suspensions can be sintered only 0.6 microns thick electrode. It is applied in MLCC and makes the MLCC miniaturization. It optimizes microelectronics technology and replaces silver electric and precious metals such as electronic pulp expected. It greatly reduces the costs. Copper and its alloy nano-powders are used as catalyst with high efficiency, selectivity. It is often found in the process of carbon dioxide and hydrogen and methanol synthesis reaction.

Conductive Silver Powders as the raw material drug (weight ratio of 0.2 to 0.4%) can significantly reduced MDA content, and to improve the oxygen free radicals caused by lipid peroxidation damage, significantly increased SOD content, and enhance the body’s SOD levels, to regulate their characteristics of the functional activity of expression, so as to achieve slow the body’s aging process, intervention, and to postpone the structure of the tissues to the aging transformation has opened up new ways of life science field of anti-aging. Researchers as the preparation of anti-aging and cerebral ischemia, cerebral complications such as therapeutic drug efficacy, easy to take, safe. More experts and professors for the treatment of cancer has made miraculous after anti-so far as to explore its mechanism. Nano-copper powder can also be used to add new medicines in the treatment of osteoporosis, bone hyperplasia materials.
Copper nanoparticles are used as metal nano lubricant additives for metal powder exporter. Adding 0.1 to 0.6% to lubricants, greases, Mount Sassafras process, to set friction pair surface form a self-lubricating, self-laminating, significantly improve the Mount Sassafras vice, anti-wear anti-friction properties. Adding nano-copper powder metal friction self-lubricating oil in the repair agent to a variety of machinery and equipment, metal friction pairs wear part of the self-healing, energy saving. It will increase equipment life and maintenance cycle.