
La criogenia studia il comportamento di materiali e sistemi a temperature inferiori a -150 °C, concentrandosi sulla produzione, il mantenimento e l'applicazione di temperature estremamente basse. Implica l'uso di fluidi criogenici come elio liquido e azoto liquido, tecniche di refrigerazione specializzate e metodi di isolamento per raggiungere e mantenere condizioni criogeniche. Le applicazioni spaziano dalla superconduttività alla tecnologia spaziale, dalla conservazione medica alla liquefazione dei gas. Questo campo integra termodinamica, fluidodinamica e scienza dei materiali per affrontare fenomeni specifici degli ambienti criogenici. La nostra raccolta di seguito raccoglie le pubblicazioni e i brevetti più recenti che descrivono in dettaglio le innovazioni in apparecchiature, processi, materiali e strumentazione criogenici.
Questa è la nostra ultima selezione di pubblicazioni e brevetti mondiali in inglese sulla criogenia, tra numerose riviste scientifiche online, classificate e focalizzate su fluido criogenico, elio liquido, azoto liquido, criocooler, superconduttori, isolamento criogenico, criostato, smagnetizzazione adiabatica, pompa criogenica, valvole criogeniche, stoccaggio criogenico, criogenia, ingegneria criogenica, refrigerazione criogenica, vuoto criogenico, liquefazione criogenica, materiali criogenici e distillazione criogenica.
Device and corresponding method for refrigerating fluids by heat exchange with liquefied cryogenic gas in a two-phase flow
Patent published on the 2026-05-13 in EP under Ref EP4740741 by SOC IT ACETILENE & DERIVATI S I A D S P A IN BREVE S I A D S P A [IT] (Frati Maurizio [it])
Abstract: The present invention relates to a device for refrigerating fluids by heat exchange with liquefied cryogenic gases in a two-phase flow comprising a heat exchanger configured to receive at least one fluid to be refrigerated, a first supply line (A) activatable to supply a first gaseous to said heat exchanger and a second supply line (B) activatable to supply a liquefied cryogenic gas to said heat exchanger.[...]
Our summary: The invention describes a device for refrigerating fluids using heat exchange with liquefied cryogenic gases. It includes a heat exchanger for receiving fluids to be refrigerated. The device has two supply lines for gaseous and liquefied cryogenic gas.
heat exchanger, cryogenic gas, two-phase flow, refrigeration
Patent
Magnetic resonance imaging apparatus and method of controlling cryocooler
Patent published on the 2026-05-13 in EP under Ref EP4741862 by FUJIFILM CORP [JP] (Yatsuo Takeshi [jp])
Abstract: [0001] An object is to extend a replacement lifetime of a cryocooler and reduce a replacement frequency of the cryocooler, thereby improving an operating rate of an MRI apparatus. [0002] A cold head lifetime extension mode is executed. In the cold head lifetime extension mode, a displacer of a cryocooler is driven at a constant frequency that is lower than a predetermined upper limit frequency regardless of a temperature of a superconducting coil, and a drive frequency of a compressor drive unit[...]
Our summary: The invention aims to extend the replacement lifetime of a cryocooler in MRI apparatus. A cold head lifetime extension mode is implemented to reduce the frequency of replacements. The displacer is driven at a constant frequency, while the compressor drive unit is adjusted based on the superconducting coil s temperature.
MRI, cryocooler, lifetime extension, superconducting coil
Patent
Magnetic resonance imaging apparatus and method of controlling cryocooler
Patent published on the 2026-05-13 in EP under Ref EP4741861 by FUJIFILM CORP [JP] (Takeshi Yatsuo [jp])
Abstract: [0001] An object is to extend a replacement lifetime of a cryocooler and reduce a replacement frequency of the cryocooler, thereby improving an operating rate of an MRI apparatus. [0002] A processor has an imaging mode and a non-imaging mode. In the imaging mode, a displacer is caused to operate continuously at a constant frequency regardless of a pressure in a vessel of a superconducting magnet.[...]
Our summary: The invention aims to enhance the lifespan of a cryocooler and minimize its replacement frequency. A processor operates in both imaging and non-imaging modes. In imaging mode, a displacer runs continuously at a constant frequency, independent of the superconducting magnet s vessel pressure.
MRI, cryocooler, imaging mode, superconducting magnet
Patent
Photonic product for in-plane chip coupling operating at cryogenic temperatures, and method of manufacturing the same
Patent published on the 2026-05-13 in EP under Ref EP4741894 by TNO [NL] (Tchebotareva Anna [nl], Van Essen Bernard Henk Marius Francois [nl], De Dood Michiel Jacob Andries [nl])
Abstract: [0001] The present application pertains to a photonic in-plane chip coupling product including a support with a first and a second stack, each comprising a carrier and an optical component. The first stack has a carrier with a mounting surface and an opposing carrier surface carrying the first optical component, which has a first guided optical mode. Likewise, the second stack has a carrier and an optical component, featuring a second guided optical mode. These stacks are aligned so that the cen[...]
Our summary: The document discusses a photonic in-plane chip coupling product designed for cryogenic temperatures. It features two aligned stacks, each with a carrier and an optical component, ensuring optimal mode field distribution. The design incorporates materials with different thermal expansion coefficients to minimize thermal deformation.
photonic coupling, cryogenic temperatures, optical components, thermal deformation
Patent
System and method for forming continuous variable cluster states and quantum correlations with microwaves
Patent published on the 2026-05-07 in WO under Ref WO2026093553 by WACQT IP AB [SE] (Lingua Fabio [se], Rivera HernÁndez Juan Carlos [se], Boch Christoph Leon [se], Haviland David B [se])
Abstract: The present disclosure relates to a system for forming continuous variable cluster states and quantum correlations with microwaves comprising a cryogenic chamber with a cryocooler, a superconducting parametric circuit, SPC, comprising a resonator, a pumping circuitry arrange to pump said SPC with three or more microwave signals to form a pump field in the resonator, control circuitry arranged to control the pumping circuitry. The cryocooler is arranged to prepare a vacuum state inside the cryoge[...]
Our summary: The system forms continuous variable cluster states using microwave signals. It includes a cryogenic chamber with a cryocooler and a superconducting parametric circuit. Control circuitry manages the pumping of microwave signals to generate quadrature-squeezed states.
quantum correlations, continuous variable, superconducting parametric circuit, microwave signals
Patent
Composition and method for cryogenic grinding of tissue, and extracellular matrix prepared therefrom
Patent published on the 2026-05-07 in WO under Ref WO2026095611 by SEOUL NAT UNIV R&DB FOUNDATION [KR] (Kwon Seong Keun [kr], Kim Hyun Seong [kr], Son Young Ju [kr], Yoo Hye Rin [kr], Lee Jeong Hoon [kr], Jang Yoo Jung [kr], Choi Ji Suk [kr])
Abstract: The present invention relates to a composition and a method for cryogenic grinding of tissue and, more specifically, to a composition and a method for cryogenic grinding of tissue, wherein the composition is applicable to both hard tissue and soft tissue and causes minimal damage to an extracellular matrix by comprising biologically derived tissue and a solid crystalline granular material which is used by being mixed with the biologically derived tissue during cryogenic grinding of the biologica[...]
Our summary: The invention presents a method for cryogenic grinding of both hard and soft tissue. It utilizes a composition that minimizes damage to the extracellular matrix. The composition includes biologically derived tissue mixed with a solid crystalline granular material for effective decellularization.
cryogenic grinding, tissue composition, extracellular matrix, decellularization
Patent
Numerical analysis of superconductivity in quasi-one-dimensional A2Mo3As3 (A = K, Rb, Cs)
Published on 2026-04-07 by Lin Wu, Yating Hu and Xiangang Wan @IOP SCIENCE
Abstract: Recent experiments have discovered superconductivity in the ternary molybdenum pnictide materials A2Mo3As3 (A = K, Rb, Cs). In this work, we investigate the superconducting properties of the A2Mo3As3 family based on an effective five-band Hubbard model and using the fluctuation exchange approximation. By solving the linearized Eliashberg equation for various interaction parameters, we find that the spin-singlet and spin-triplet pairings dominate as the leading pairing symmetries in the weak and [...]
Our summary: This study analyzes superconductivity in A2Mo3As3 materials using a five-band Hubbard model. The research identifies spin-singlet and spin-triplet pairings as dominant pairing symmetries under varying electron interactions. Findings align well with recent experimental observations.
Superconductivity, Quasi-one-dimensional, Hubbard model, Eliashberg equation
Publication
Strong enhancement of p?+?ip and d?+?id topological superconductivity on a center-decorated honeycomb lattice
Published on 2026-03-19 by Kai Cheng, Xin-Hao He, Zhi-Peng Sun, Zhuo-Ran He and Zhong-Bing Huang @IOP SCIENCE
Abstract: Using the constrained-path quantum Monte Carlo method, we investigate the superconducting and charge properties of the extended Hubbard model on a center-decorated honeycomb lattice, which includes nearest-neighbor attraction (V1) and third-nearest-neighbor attraction (V2) between sites on the hexagonal grid. Our simulations show that V1 and V2 act to strongly enhance the triplet p + ip and singlet d + id pairing correlations, respectively. Increasing charge density on the hexagonal grid[...]
Our summary: This study examines the enhancement of p+ip and d+id topological superconductivity on a center-decorated honeycomb lattice using the constrained-path quantum Monte Carlo method. The simulations reveal that nearest-neighbor and third-nearest-neighbor attractions significantly boost pairing correlations while charge density influences the competition among pairing symmetries. Additionally, the findings indicate that site disorder and reduced hopping can suppress dominant pairing symmetries, while V2 increases charge structure factors, suggesting pathways to realize topological superconductivity.
topological superconductivity, honeycomb lattice, quantum Monte Carlo, Hubbard model
Publication