Liquid argon (LAr) is a low-temperature liquid form of argon. Argon (Ar) is a rare inert gas with atomic number 18, which widely exists in the earth’s atmosphere. The volume proportion of argon in the atmosphere is stable at 0.93-0.934, which is the third most abundant gas in the atmosphere.
High purity liquid argon in the industrial field is all prepared by liquid air fractionation process. Through the air separation equipment for air compression, liquefaction, distillation separation, removal of oxygen, nitrogen, moisture, hydrocarbons and other impurities, and finally get high-purity cryogenic liquid argon.
Liquid argon inherits the inert nature of argon and has excellent safety and stability properties. Under normal conditions, it is a colorless, tasteless, and odorless transparent liquid. It is non-toxic, non-flammable, and non-corrosive, and will not chemically react with most metal and non-metallic materials.
As a typical cryogenic medium, the boiling point of liquid argon at atmospheric pressure is as low as -185.9 ℃, which requires extremely high thermal insulation performance of storage and transportation equipment, and must be stored in a vacuum insulated container.
Liquid argon has a very advantageous volume expansion ratio. 1 volume of liquid argon can be expanded to 780-860 volumes of gaseous argon at normal temperature and pressure. This feature makes the gas storage capacity of liquid argon far exceed that of traditional compressed gas cylinders, which is the core advantage of large-scale gas supply.
At the same time, the density of liquid argon is greater than that of air, and it can settle stably on the surface of the operation area after gasification, forming a dense isolation gas layer, which is also one of the core characteristics that it is superior to most inert gases.
Compared with the gaseous argon filled with traditional high-pressure gas cylinders, the storage density of liquid argon is greatly improved, and the gas storage capacity in the same space is increased hundreds of times. Enterprises do not need to pile up a large number of heavy industrial gas cylinders, which can greatly save the storage space of the factory and optimize the layout of the workshop.
The use of vertical cryogenic storage tank centralized storage liquid gas supply mode, can achieve 24 hours uninterrupted and stable gas supply. Completely avoid the problems of frequent replacement and ventilation shutdown of traditional gas cylinders, effectively reduce the loss of production downtime, and improve the continuous operation efficiency of the production line.
In medium-to large-scale gas scenarios, the unit gas cost of industrial liquid argon is lower. Significantly reduce the additional costs of cylinder leasing, frequent logistics and transportation, manual handling and replacement, and long-term use can significantly reduce the cost of production consumables.
Relying on low-temperature liquefaction and multi-stage distillation process, industrial liquid argon can easily achieve ultra-high purity of 99.999%(5N) and above. The purity of liquid argon for semiconductor manufacturing can reach 6N level, and the impurity content is controlled at ppb level.
The content of active impurities such as oxygen, moisture and hydrocarbons in liquid argon is extremely low, and the gas quality is uniform and stable. There is no problem of gas purity fluctuation in ordinary gas cylinders, and it can be accurately adapted to high-precision and highly sensitive industrial production scenarios.
As an international liquid argon supplier, Fullcryo serve semiconductor enterprises in different regions and provide stable ultra-high purity gas source, which can effectively reduce defects such as porosity, embrittlement, oxidation and doping, greatly improve the yield of finished products of workpieces, metal materials and chip components, and reduce the cost of rework and scrap.
As a completely inert rare gas, argon after gasification of liquid argon remains stable in high temperature environment, and will not react with most industrial materials such as stainless steel, titanium alloy, aluminum alloy, silicon material and so on.
Because the density is greater than air, argon can form a dense protective gas layer in the molten pool, furnace and wafer processing cavity, actively replace and isolate oxygen and nitrogen in the air, and prevent oxidation and nitriding pollution.
Whether it is high-temperature steelmaking, precision welding, or semiconductor wafer annealing, etching process,industrial liquid argon can provide a pure inert environment, to ensure that the product structure is dense, stable performance, excellent corrosion resistance.
Liquid argon itself does not burn, non-combustion, non-toxic and non-corrosive, does not belong to flammable and explosive dangerous media, the overall safety properties are better than hydrogen, oxygen, combustible gas mixtures and other industrial media.
The low-pressure storage mode of cryogenic tank avoids the safety hazards of high-pressure gas cylinder explosion and valve breakage and leakage, and the safety and controllability of large-scale operation is stronger.
As long as the risk of suffocation and low-temperature frostbite in confined spaces is regulated and controlled, and standardized operation and maintenance is done, liquid argon can operate stably for a long time, effectively reducing the probability of process fluctuations, safety accidents and production rework.
Liquid argon in welding as MIG gas shielded arc welding, plasma arc welding and other mainstream processes.
For aluminum alloy, magnesium alloy, titanium alloy, stainless steel and other easily oxidized active metals, the argon protective layer can prevent the oxidation and nitriding reaction in the welding process, and avoid the problems of porosity, crack and embrittlement in the weld.
Relying on the advantages of continuous and stable liquid argon supply, large sheet metal processing plants, steel structure enterprises and aerospace parts manufacturers can realize continuous welding of assembly lines, greatly improving welding efficiency, weld strength and corrosion resistance.
In steelmaking equipment such as electric arc furnace, converter, AOD argon oxygen decarburization furnace, liquid argon gasification gas supply is mainly used for molten steel stirring, degassing and impurity removal, and composition homogenization treatment.
The argon gas used in the high-speed rail industry can effectively remove harmful gases such as hydrogen and nitrogen in molten steel, reduce non-metallic inclusions, stabilize the carbon-chromium ratio of carbon steel and stainless steel, reduce the loss of precious metal chromium, and improve the purity and quality of steel.
In continuous casting, ladle flushing, hot isostatic pressing and other processes, industrial liquid argon provides an inert protective atmosphere to prevent secondary oxidation of high-temperature molten steel and alloy melts, helping high-end special steel and precision alloy mass production and quality improvement.
Semiconductor chip manufacturing requires extremely strict gas purity, trace-level impurities will cause the entire wafer to be scrapped, ultra-high purity liquid argon is the core auxiliary gas of the chip process.
Liquid argon for semiconductor manufacturing is used in core processes such as monocrystalline silicon growth, plasma etching, magnetron sputtering coating, wafer annealing, and cavity purge cleaning, providing an oxygen-free and impurity-free inert environment throughout the process.
Large-scale liquid argon supply can provide a stable and high-purity gas source for wafer fabs and electronic processing plants, ensuring the stability of nanoscale precision processes and greatly improving chip yield and product reliability.
Argon in the plasma cutting process, mixed hydrogen, nitrogen can form a high temperature plasma arc, precision cutting stainless steel, aluminum alloy and other high-end metal sheet, cut smooth without oxide layer.
In metal annealing, sintering, quenching and other heat treatment processes, the inert furnace atmosphere created by liquid argon can avoid surface oxidation and nitriding of titanium alloys, refractory metals and other materials, and completely retain the original mechanical properties of the material.
At the same time, liquid argon is suitable for metal powder atomization and industrial metal 3D printing molding process to ensure that the printed workpiece is compact in structure, accurate in size, free of oxidation defects, and suitable for additive manufacturing of high-end precision parts.
With the stable low temperature environment and excellent ionization and scintillation characteristics, liquid argon is used in particle physics detection, dark matter research, neutrino experiments and other cutting-edge scientific research fields, and is the core medium of LArTPC detector.
Liquid argon in field of laboratory testing, can be used as carrier gas and plasma gas source for chromatographic analysis and ICP instruments to ensure accurate and stable testing data.
In addition, liquid argon can also be used in low-temperature cryoablation medical, special low-temperature experiments and other niche high-end scenes, covering scientific research, medical, precision testing and other diverse fields.
Liquid argon is a low-temperature liquid medium at -185.9 ℃. It is stored in vacuum insulated cryogenic storage tank and Dewar tank. It operates at low pressure and has a great gas storage capacity. Gas argon is a normal temperature and high pressure gaseous medium, relying on high pressure cylinder compression storage, single bottle gas storage capacity is limited.
Under the same occupied space, the gas storage capacity of liquid argon is hundreds of times that of high-pressure gas cylinders, which completely solves the problems of large area, large quantity and complicated management of gas cylinders.
The liquid argon storage tank can continuously gasify and supply gas all day long, with stable pressure and purity without fluctuation, and is fully adapted to the uninterrupted production of the assembly line. The gas volume of the gas argon cylinder is limited, and it needs to be stopped and replaced when it is used up, which is easy to cause production interruption and process parameter fluctuation. For continuous production enterprises, liquid argon can effectively reduce downtime losses, improve overall production efficiency, and adapt to large-scale mass production needs.
The core risk of gas argon is the pressure risk of high-pressure gas cylinder, which has potential safety hazards such as valve damage, tank burst and high-pressure leakage. Liquid argon has no risk of high-pressure explosion, the main risks are low-temperature frostbite, confined space suffocation and a small amount of evaporation loss, as long as the insulation protection, ventilation pipe control, safety and controllability is higher.
Liquid nitrogen is cheaper and more versatile, suitable for ordinary purging, preservation and conventional heat treatment scenarios. However, under high temperature environment, it will react with titanium alloy, stainless steel and aluminum alloy to generate brittle nitrides, which will destroy the performance of the workpiece.
Liquid argon is more inert, more dense, more stable to protect the gas layer, does not produce nitride pollution, is the preferred medium for active metal welding, high-end metallurgy, semiconductor technology, suitable for high-precision high-demand scenarios.
Both are completely inert rare gases, but liquid helium has extremely low density, strong thermal conductivity, expensive and scarce resources, and is only suitable for niche scenarios such as special deep cooling and penetrating welding.
Liquid argon is more cost-effective, covers a wider range of scenes, and can form a stable protective layer at low flow, which is the mainstream preferred solution for industrial inert protection and gas supply.
Liquid oxygen is a strong oxidizing combustion-supporting medium, which is mainly used in combustion-supporting, cutting, and medical oxygen supply scenarios. The core function is to accelerate the oxidation reaction. The role of liquid argon is the complete opposite, the main isolation oxidation, inhibition of reaction, the two are often used in the air separation industry, complementary functions, each other.
Industrial high purity liquid argon all use air separation process mass production, the whole process standardization, high degree of automation, can be stable production of high purity finished products.
First of all, the ambient air is filtered and compressed, and the water, carbon dioxide and hydrocarbon impurities are completely removed by the pretreatment of molecular sieve, so as to avoid blocking the equipment and polluting the finished product by freezing at low temperature.
The purified compressed air enters the cold box, is cooled and liquefied by the heat exchanger and expander, and then is distilled by high and low pressure double towers, and is separated by layers according to the difference of boiling points of nitrogen, argon and oxygen.
After extracting the crude argon component in the middle section, it is purified by deoxidation and secondary distillation to remove the impurities of oxygen and nitrogen, and finally ultra-high purity argon is obtained, and then liquefied and stored as finished liquid argon at low temperature.
Small batch scene: the use of small Dewar tank, capacity up to 200 liters, portable and easy to operate, suitable for short-term experimental gas.
Medium-sized industrial uses: cryogenic liquid argon steel cylinders with a capacity of 100-500 litres are used, taking into account portability and gas storage capacity, and are suitable for small and medium-sized processing plants.
Large factory supply: fixed low-temperature vacuum storage tank is adopted, the capacity is 3000 to tens of thousands of liters, and the gasification voltage stabilization system is matched to realize all-weather centralized gas supply.
Cross-regional transportation use: vacuum insulated ISO low-temperature tanks can be transported by road, rail and sea to ensure low-temperature and low-loss storage throughout the process.
Fullcryo has been deeply engaged in the cryogenic air separation and industrial gas support sectors for 10 years, focusing on providing global industrial enterprises with end-to-end customized liquid argon solutions that cover the entire process—equipment manufacturing, storage and transportation, installation and commissioning, as well as operations and maintenance—while ensuring safety and regulatory compliance.
We offer a complete suite of customized, standardized air separation equipment, cryogenic liquid argon storage tanks, vaporization and delivery pipelines, and other supporting systems, ensuring stable liquid argon purity, continuous gas supply, and controllable losses.
We also provide professional on-site installation and commissioning, regular maintenance and repair, and safety compliance guidance, catering to diverse industries such as metallurgy, welding, semiconductors, and research, thereby helping enterprises reduce costs, boost efficiency, and improve production quality.
For small-volume, intermittent gas usage scenarios, argon gas offers greater flexibility and requires lower equipment investment. Medium-large-scale, continuous production scenario, liquid argon comprehensive cost is lower, more stable gas supply, long-term use of cost-effective far more than bottled gas argon.
Small batches use Dewar tanks for short-distance transportation; medium batches use low-temperature tanker road transportation; cross-country and cross-regional mass transportation use ISO cryogenic liquid argon storage tanks, full vacuum insulation, compliance and safety.
Liquid argon itself does not deteriorate or expire, but it does experience natural evaporation and loss. The daily loss of large insulated storage tanks can be controlled at 0.1-0.5%, and can be stored stably for weeks or even months without worrying about quality degradation.
Yes. Through the air temperature type, steam type vaporizer can be uniform speed gasification of liquid argon to high purity argon, purity without loss, pressure stability, can be directly connected to the production line.
Ordinary semiconductor process requires 5N(99.999%) high purity liquid argon, advanced nano process requires 6N and above ultra-high purity liquid argon, impurities are controlled at ppt level, and chip defects caused by trace pollution are eliminated.
Liquefied argon, with its ultra-high purity, exceptional inertness, extremely high expansion ratio, and cost-effective large-scale supply, has become an indispensable core inert medium in modern high-end industries. It is used in a variety of applications, including precision welding, special metallurgy, semiconductor manufacturing, 3D printing, and cutting-edge scientific research. Enterprises can contact us to select a customized liquid argon storage and supply solution based on their gas consumption scale and production precision requirements.
