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CN-121974559-A - Optical fiber anisotropic micro-channel glass-based atomization core and manufacturing method and application thereof

CN121974559ACN 121974559 ACN121974559 ACN 121974559ACN-121974559-A

Abstract

The invention relates to an optical fiber anisotropic microchannel glass-based atomization core, a manufacturing method and application thereof. The manufacturing method comprises the steps of preparing an optical fiber blank, wherein a plurality of vertically arranged optical fiber microstructures are arranged in the optical fiber blank, each optical fiber microstructure comprises an outer skin glass tube and an inner core glass rod, one surface of the exposed core glass rods is used as a first end surface, the side surface of the first end surface is used as a second end surface, a different-direction micro-channel is formed on the second end surface, the optical fiber blank with the different-direction micro-channel is processed into a different-direction micro-channel glass base blank, the different-direction micro-channel glass base blank is etched, through holes formed by etching are the optical fiber micro-channels, the micro-channels in two directions are combined into a glass base with transverse micro-channels and longitudinal micro-channels, and the first end surface of the glass base with the transverse micro-channels is subjected to heating layer coupling to obtain the optical fiber different-direction micro-channel glass base atomized core. The invention has the advantages of improving the use reliability, reducing the high-temperature pyrolysis of the extract and improving the flavor reduction degree.

Inventors

  • WANG SANZHAO
  • MA XIXIANG
  • WANG ZIZHOU
  • MA HONGXIN
  • LIU HAORAN
  • MING YUETONG
  • LI XULEI

Assignees

  • 中建材光芯科技有限公司

Dates

Publication Date
20260505
Application Date
20251224

Claims (10)

  1. 1. A manufacturing method of an optical fiber anisotropic micro-channel glass-based atomized core is characterized by comprising the following steps: (1) The method comprises the steps of coaxially nesting and combining a cortical glass tube and a core glass rod to prepare an optical fiber blank, wherein a plurality of vertically arranged optical fiber microstructures are arranged in the optical fiber blank, each optical fiber microstructure comprises an outer cortical glass tube and an inner core glass rod, one surface of the exposed plurality of core glass rods is a first end surface, and the side surface of the first end surface is a second end surface; (2) Forming a plurality of anisotropic micro-channels which are arranged at the same distance on the second end face; (3) Cold working is carried out on the optical fiber blank plate with the anisotropic micro-channel to obtain an anisotropic micro-channel glass base blank plate; (4) Etching the anisotropic microchannel glass substrate to remove the core layer glass rod component in the optical fiber microstructure, wherein the formed through holes are optical fiber microchannels, and the microchannels in two directions are combined into a glass substrate with transverse and longitudinal microchannels; (5) And (3) carrying out heating layer coupling on the first end face of the glass base with the transverse and longitudinal micro-channels to finally form the glass base atomization core of the optical fiber anisotropic micro-channel.
  2. 2. The method of claim 1, wherein the anisotropic micro-channel is a predetermined microstructure formed by locally micro-melting, micro-blasting or phase-changing the optical fiber blank by focusing a laser on the inside or a specific depth of the optical fiber blank.
  3. 3. The method according to claim 2, wherein the processing method of the anisotropic micro-channel comprises laser engraving or laser drilling, the side surface opposite to the second end surface is a third end surface, the anisotropic micro-channel penetrates from the second end surface to the third end surface, and the anisotropic micro-channel and the optical fiber micro-channel form an intersection angle of 90 DEG + -5 deg.
  4. 4. The method of manufacturing according to claim 3, wherein the etching comprises performing acid etching or acid-base alternate wet etching on the anisotropic microchannel glass substrate, so that the acid solution or alkali solution reacts with the core glass rod in the optical fiber microstructure, and finally the core glass rod is completely dissolved to form the arrayed optical fiber microchannels; The aperture of the optical fiber micro-channel is 1-100um, and the aperture ratio is 10-95%; the aperture of the anisotropic micro-channel is 5-70um, and the aperture ratio is 10-40%; the acid liquid is at least one selected from hydrochloric acid, nitric acid, sulfuric acid and citric acid.
  5. 5. The manufacturing method of claim 4, wherein the heating layer is a metal film layer or a metal sheet, and is plated on the surface of the optical fiber micro-channel by a magnetron sputtering deposition technology; The number of the metal film layers is more than or equal to 1, more than two metal film layers are more than two material film layers, and the metal film layers are sequentially sputtered on the surface end of the first end surface through a certain sequence; The metal film layer is selected from one of titanium, tantalum, tungsten, iron, copper, aluminum, gold, silver and platinum, and one of iron alloy, tantalum alloy, copper alloy, aluminum alloy, nickel alloy and titanium alloy; The metal sheet is selected from one of copper, tungsten, nickel, iron, titanium, tantalum, gold, platinum, silver and aluminum, and the metal sheet is selected from one of iron alloy, tantalum alloy, copper alloy, aluminum alloy, nickel alloy and titanium alloy.
  6. 6. The method of manufacturing according to any one of claims 1 to 5, wherein the method of manufacturing the optical fiber preform comprises the steps of: (1) The method comprises the steps of coaxially nesting and combining a skin glass tube and a core glass rod to form an optical fiber preform, vertically placing the optical fiber preform into a vacuum heating furnace, and bonding the skin glass tube and the core glass rod through a vacuum heating process; (2) The bonded optical fiber preform is sent into a drawing device and is subjected to drawing treatment to obtain optical fiber monofilaments, a plurality of optical fiber monofilaments are arranged to form primary multifilament rods, and the primary multifilament rods are placed into the drawing device and are further drawn to obtain primary multifilament; (3) Binding and fixing the arranged primary multifilament in a hot-pressing die, putting the hot-pressing die with the primary multifilament in a vacuum hot-pressing furnace for melting and pressing, and obtaining an optical fiber blank to be processed after the melting and pressing process in the vacuum hot-pressing furnace is completed; (4) Continuously monitoring the temperature in the furnace until the temperature is reduced to room temperature, and then taking the annealed optical fiber blank out of the furnace; (5) And carrying out cold working treatment on the annealed optical fiber blank plate to obtain the optical fiber blank plate.
  7. 7. The manufacturing method according to claim 6, wherein the sheath glass tube and the core glass rod are made of special glass materials with high transparency and low absorption, the transparency is more than or equal to 85% under the visible light wave band or the specific laser wavelength, and the linear absorption coefficient to the target laser wavelength is less than or equal to 0.1cm -1 ; the fracture toughness of the sheath glass tube and the core glass rod is more than or equal to 0.7MPa x m 1/2 ; the primary multifilament obtained in the step (2) is adjusted according to the size of the micro-channel of the optical fiber, and the number of times of arranging and drawing the optical fiber monofilaments is more than or equal to 1; The material of the cortex glass tube is a special glass material with acid and alkali corrosion resistance and a glass transition temperature of 500-800 ℃; the material of the core layer glass rod is an acid-soluble special glass material with the glass transition temperature of 500-800 ℃; the glass transition temperature difference of the sheath glass and the core glass of the optical fiber preform is less than or equal to 50 ℃, the difference percentage of the thermal expansion coefficients is less than or equal to 20%, and the wire drawing temperature of the sheath glass and the core glass is 550-900 ℃.
  8. 8. The method of manufacturing according to claim 7, wherein the melt pressing operation includes: Vacuumizing the vacuum hot-pressing furnace to a vacuum degree of less than 50pa, heating at a rate of 0.5-8 ℃ per minute, firstly heating to 400-600 ℃ for 20-180 minutes, then continuously heating to 500-800 ℃ for 1-5 hours, finally heating to 500-900 ℃ for 1-5 hours, and then starting a press to apply pressure to the hot-pressing die, wherein the compression ratio is controlled to be 0.75-0.99; The gradient annealing treatment comprises the steps of continuously preserving the heat of an optical fiber blank plate to be processed at 500-900 ℃ for 1.5-2.5h after hot pressing, then reducing the temperature to 250-350 ℃ at the speed of 1-2 ℃/min, preserving the heat for 20-40 min, and naturally cooling to room temperature.
  9. 9. An optical fiber anisotropic microchannel glass-based atomized core prepared according to the preparation method of any one of claims 1 to 8.
  10. 10. Use of the optical fiber anisotropic microchannel glass-based nebulizing core of claim 9 in electronic cigarettes, medical nebulizers, fragrance nebulizing equipment and healthcare nebulizing devices.

Description

Optical fiber anisotropic micro-channel glass-based atomization core and manufacturing method and application thereof Technical Field The invention relates to the technical field of electronic atomization equipment manufacturing, in particular to an optical fiber anisotropic microchannel glass-based atomization core, and a manufacturing method and application thereof. Background In recent years, electronic atomization technology is rapidly popularized in the fields of consumption and medical treatment, an atomization core is used as a core functional component of electronic atomization equipment, and the material characteristics and structural design of the atomization core directly determine the atomization efficiency, flavor reduction stability and product service life of tobacco tar or an extract, so that the atomization core becomes a key link for restricting technical upgrading of industries. At present, two main materials of cotton core and ceramic core are mainly adopted for preparing the atomization core by the mainstream atomization core in the market, but the two materials have technical defects which are difficult to overcome in practical application. The cotton core relies on capillary action among fibers to realize tobacco tar adsorption and conduction, and has the advantages of high oil guiding speed (the oil guiding speed can reach 0.3-0.5mL/min under the conventional condition) and low production cost, but the organic cotton fiber is easy to carbonize and scorch under the high-temperature atomization environment (the conventional working temperature is 200-300 ℃), so that not only can the irritation scorched smell be generated to cause the deterioration of taste, the actual flavor of tobacco tar or an extract can not be reduced, but also the service life of the atomization core can be shortened, the conventional service life of the atomization core of the cotton core is only 500-1000 mouths, in addition, the high-temperature stability of the cotton fiber is poor, volatile organic pollutants such as formaldehyde, benzene compounds and the like can be released during the thermal decomposition process, potential safety hazards exist, meanwhile, the contact uniformity of the cotton core and a heating component is insufficient, the local overheating easily occurs, the single-point temperature can reach more than 350 ℃, and the insufficient smoke tar atomization is caused, and the stability of the smoke output effect is further influenced. The ceramic core realizes liquid guiding and heating through the micropore structure of the porous ceramic matrix, although the high temperature resistance (the long-term working temperature can reach more than 350 ℃) is obviously improved compared with a cotton core, the phenomenon of core pasting is improved to a certain extent, the porosity of the ceramic material and the oil guiding speed have natural contradiction, and when the porosity is too high and is more than 60%, the oil guiding speed is too high, so that the smoke oil is easy to overflow; when the porosity is too low and less than 40%, the oil guiding speed is insufficient, so that dry burning is easily caused, and scorching taste is generated, meanwhile, the number of pores of a ceramic core is small, the pore density of a conventional product is less than or equal to 100 pores/cm <2 >, the pore size distribution is uneven, the pore diameter distribution is wider, the oil guiding interruption is usually caused by pore blockage caused by deposition of tobacco residue in the long-term use of the ceramic core, the reliability is poor, in addition, the sintering temperature of the ceramic core is usually 1200-1500 ℃ in the high-temperature sintering process, heavy metal impurities in raw materials, such as lead, cadmium and the like, are easily transported to the surface due to lattice diffusion, the heavy metal leaching amount of part of the product can reach 0.01-0.1mg/L according to GB 4806.4-2016 detection standard, the inhalation risk of human body exists, the consistency of the ceramic sintering process is poor, the yield is usually lower than 70%, the three-dimensional network of a porous structure is easy to remain the tobacco oil impurities, the three-dimensional network is difficult to remove in a conventional clean mode, and flavor problem easily occurs after long-term use. Therefore, the existing cotton core and ceramic core atomization core cannot meet the core requirements of high oil conductivity, high temperature stability, safety, no harm and real taste, the cotton core has the problems of burnt smell at high temperature and release of harmful substances although oil is quickly led, the ceramic core has good temperature resistance, but has heavy metal risks, pore blockage and hidden danger of oil leakage, and the flavor degradation of an extract at high temperature cannot be avoided. The glass material has the characteristics of chemical inertness (meeting the general safety requiremen