A laser-assisted 3D printing ceramic method based on light-induced black body absorption effect

Abstract

The application discloses a kind of laser-assisted 3D printing ceramic methods based on light-induced black body absorption effect, belong to the technical field of ceramic material processing, using light-induced black body absorption material modified ceramic mud as 3d printing raw material, under the induction laser irradiation, modified ceramic mud can enter light-induced black body absorption state, at this time, the material has more than 90% absorption rate to the light in wide spectrum range;And the absorption rate of material to processing laser is extremely high, material is heated to the sintering temperature of ceramic in short time by laser, effectively improve the processing efficiency of laser.Based on the high absorption rate of modified ceramic raw material to processing laser in light-induced black body absorption state, on the basis of original 3d printing ceramic technology, introduce laser to point by point irradiation to just extruded modified material, original 3d printing, debinding and sintering are compressed into 3d printing and sintering two steps, extrusion molding, laser debinding and laser pre-sintering three processes are carried out simultaneously, greatly compressed the processing time of 3d printing ceramic.

Description

Technical Field

[0001] This invention belongs to the field of ceramic material processing technology, specifically relating to a laser-assisted 3D printing method for ceramics based on the photoinduced blackbody absorption effect. Background Technology

[0002] Ceramics are non-metallic inorganic materials made from natural or artificial raw materials such as clay and kaolin through molding and firing. They possess characteristics such as high hardness, high temperature resistance, corrosion resistance, and good insulation, and are widely used in daily necessities, decorations, electronic devices, and other fields. However, these very characteristics also make the manufacturing and processing of ceramics more difficult. Their high hardness and high melting point limit the complexity of their morphological processing, while also increasing their brittleness and fragility.

[0003] The emergence of ceramic 3D printing technology, as a rapid prototyping additive manufacturing technique, effectively overcomes the aforementioned shortcomings. It can directly generate parts of any shape from computer graphics data, without machining or molds, and quickly manufacture ceramic materials with complex morphologies. However, existing 3D ceramic printing technologies inevitably require the addition of various binders to the raw materials for successful 3D printing of the ceramic preform. During subsequent firing, these binders can hinder ceramic formation. Therefore, a debinding process is usually added after the ceramic preform is formed and before firing to remove the binders from the preform using various methods. However, the debinding process for large-volume ceramic preforms inevitably creates voids where the binder has detached, increasing the porosity of the fired ceramic and reducing its mechanical strength. Furthermore, the presence of these voids exacerbates shrinkage during the later firing process, resulting in poor precision in 3D printed ceramic devices. Summary of the Invention

[0004] To address the problems of high porosity, high shrinkage, low precision, and low mechanical strength in existing 3D printing ceramics methods, this invention provides a laser-assisted 3D printing method for ceramics based on the photoinduced blackbody absorption effect. By combining a photoinduced blackbody absorbing material with ceramic raw materials, the absorption rate of the ceramic clay material to the induced laser is changed. Under irradiation by the induced laser, the modified ceramic clay material rapidly enters the photoinduced blackbody absorption state, at which point the material has an absorption rate of more than 90% for electromagnetic waves in a wide wavelength range (200nm~2500nm).

[0005] The principle of the laser-assisted 3D printing method for ceramics based on the photoinduced blackbody absorption effect of the present invention is as follows:

[0006] Ceramic clay modified with photo-blackbody absorbing materials is used as a 3D printing raw material. Under induced laser irradiation, the modified ceramic clay can enter a photo-blackbody absorption state. In this state, the material has an absorption rate of more than 90% for light in a broad spectrum (200nm~2500nm). In this state, the material has an extremely high absorption rate for processing lasers, and can be heated to the ceramic sintering temperature by the laser in a short time, effectively improving the laser processing efficiency. Based on the high absorption rate of the modified ceramic raw material for processing lasers in the photo-blackbody absorption state, laser irradiation is introduced to the freshly extruded modified material point by point, building upon existing 3D ceramic printing technology. The original 3D ceramic printing steps are improved, compressing the original 3D printing, debinding, and firing processes into two steps: 3D printing and firing. This allows extrusion molding, laser debinding, and laser pre-firing to occur simultaneously, significantly reducing the processing time for 3D printed ceramics. Furthermore, compared to traditional 3D printing ceramics technology, which involves heating and debinding after printing and then sintering, the large volume of the preform leads to problems such as high porosity, high shrinkage, poor precision, and low mechanical strength in the finished 3D printed ceramic product. By directly irradiating the freshly extruded modified ceramic raw material with a laser, extrusion molding, laser debinding, and laser pre-firing are performed simultaneously. Only the freshly extruded portion undergoes debinding and sintering at the same time, effectively avoiding the various problems associated with debinding and sintering large volume preforms.

[0007] This invention is achieved through the following technical solution:

[0008] The method for laser-assisted 3D printing of ceramics based on the photoinduced blackbody absorption effect specifically includes the following steps:

[0009] Step 1: Modify the ceramic clay raw material using photo-induced blackbody absorbing materials;

[0010] By doping the ceramic clay raw material with a photoinduced blackbody absorbing material whose absorptivity matches the induced laser wavelength, the ceramic material is endowed with photoinduced blackbody absorption characteristics.

[0011] Step 2: Place the prepared printing material into the extruder of the 3D printer;

[0012] Step 3: Adjust the auxiliary laser spot using an optical collimation and focusing system so that the laser spot is focused on the 3D printing material that has just been extruded from the 3D printer's extruder head; the process of the 3D printer's extruder head extruding the 3D printing material is synchronized with the laser-assisted irradiation, and the spatial distance between the exit of the 3D printer's extruder head and the laser focused spot is 2mm-10mm.

[0013] Step 4: Import the data of the model to be printed into the 3D printer;

[0014] Step 5: The 3D printer prints according to the preset path. After the modified ceramic clay is extruded from the exit of the 3D printer, the inducing laser first irradiates the freshly extruded modified ceramic raw material. The material is degreased and enters the photoinduced blackbody absorption state. At this time, the absorption rate of the material to the processing laser increases instantly, the temperature of the material rises and exceeds the melting point of the ceramic material. After the laser spot is removed, the ceramic clay material is transformed into ceramic. The laser-assisted 3D printer repeats the above operation continuously, and finally forms a 3D printed ceramic device.

[0015] Further, in step one, the raw materials for the ceramic clay are kaolin, porcelain stone, Xuyong clay, bentonite, and pyrophyllite; the photoluminescent blackbody absorbing material is a material with an absorption rate of greater than 0.1% for the working laser.

[0016] Furthermore, the photo-induced blackbody absorbing material includes, but is not limited to, polymers containing rare earth elements or transition metal elements, quantum dots, or gold nanoparticles.

[0017] Furthermore, the rare earth element includes Yb 3+ Er 3+ 、Nd 3+ 、Tb 3+ Eu 3+ The transition metal element includes Fe. 3 + Cr 3+ Ni 3+ The gold nanoparticles include ZnS, ZnO, MnS, and ZnSe.

[0018] Furthermore, in step one, the ceramic clay raw material and the photoluminescent blackbody absorbing material are mixed evenly at a mass ratio of 98:2 to 90:10 to obtain the prepared printing material.

[0019] Furthermore, in step three, a single-beam laser is used to assist in the 3D printing of ceramic devices, or two laser beams are used to assist in the 3D printing of ceramic devices. When using a single laser beam, the power is 1W-5W. When using two laser beams, one laser beam has a low power (less than 5W) and the other laser beam has a high power (greater than 5W).

[0020] Furthermore, in step three, the laser that generates the laser includes a semiconductor laser, a solid-state laser, or a fiber laser; the laser used is a continuous, quasi-continuous, or pulsed laser; and the operating wavelength of the laser is between 200 nm and 2500 nm.

[0021] Laser power is typically 1W to 5W.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] 1. By combining ceramic raw materials with corresponding dopants, the ceramic raw materials are made capable of entering the photo-induced blackbody absorption state under the irradiation of the working laser. This improves the absorption performance of the ceramic raw materials to the laser and enhances their laser machinability, allowing the laser to rapidly heat the material point by point.

[0024] 2. In the ceramic 3D printing process, the laser heats the freshly extruded ceramic raw material point by point, and the extrusion molding, debinding and pre-sintering are carried out simultaneously. The original 3D printed ceramic process of printing, debinding and firing is reduced to two steps of printing and firing, which effectively reduces the processing time.

[0025] 3. In the ceramic 3D printing process, the laser heats the freshly extruded ceramic raw material point by point, and the extrusion molding, debinding and pre-sintering are carried out simultaneously. At the same time, only the freshly extruded material is processed, which effectively avoids the high porosity of large green bodies during the debinding and firing process.

[0026] 4. Extrusion molding, debinding, and pre-sintering are carried out simultaneously. The printing process is monitored in real time using a camera. The existing printing status and built-in parameters are compared in real time. The printing parameters are adjusted in real time and the printing is compensated layer by layer through an algorithm. This effectively avoids the high shrinkage rate and low accuracy caused by the original large-body firing. This printing method can accurately print larger ceramic materials.

[0027] 5. Extrusion molding, debinding, and pre-sintering are carried out simultaneously, and only the freshly extruded material is processed. This effectively avoids the high porosity of large green bodies during debinding and firing. The low porosity results in higher mechanical strength for the ceramic material. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 Photographs of Y2O3:0.7% Yb materials irradiated with 980nm excitation light of different powers;

[0030] Where, a: before laser irradiation; b: 10W; c: 12W; d: 14W; e: 16W; f: 18W; g: 20W; h: after laser irradiation, the inset is a magnified image of a local area of ​​the sample after laser irradiation;

[0031] Figure 2 Schematic diagram of the spectrum and integrated intensity of light-induced blackbody absorption;

[0032] a: Luminescence spectra of Y2O3 materials under different 980nm excitation light powers (0-30W); b: Changes in the integrated intensity of photoinduced blackbody emission (400-800nm) and the scattering intensity of 980nm excitation light of Y2O3 materials as the 980nm excitation light power increases;

[0033] Figure 3 Schematic diagram of the scattering intensity of 980nm light on Y2O3 material before (curve 1) and after (curve 2) light-induced blackbody absorption;

[0034] The irradiation light used was a 980nm laser (0.5W), and the excitation light used was an 808nm laser (15W). Both laser beams were focused on the same point on the sample. When the 15W 808nm laser was present, the sample exhibited blackbody absorption, and the intensity of the 0.5W 980nm scattered light decreased significantly, indicating that the sample absorbed light much more strongly.

[0035] Figure 4 Schematic diagram of light-induced blackbody absorption and the strong light absorption phenomenon generated by the material;

[0036] a: Changes in the intensity of light emission (left) and scattering of 980nm excitation light (right) of Yb2O3 material before and after photoinduced blackbody absorption; b: Schematic diagram of photon avalanche upconversion luminescence; c: Changes in scattering intensity (curve 1) of five types of irradiated laser light (266nm, 405nm, 532nm, 650nm, 808nm, and 1560nm) before and after the occurrence of photoinduced blackbody absorption (curve 2); d: Under the photoinduced blackbody absorption state, the relative absorption (absorption ratio) of the sample to the six probe lasers is all above 90%, exhibiting strong light absorption characteristics;

[0037] Figure 5 Schematic diagram of a material thin-section transmission spectroscopy measurement device;

[0038] Figure 6 Schematic diagram of transmission spectrum and relative transmittance;

[0039] a: Transmission spectra of Yb2O3 material sheets under different irradiation powers of 980nm excitation light; b: Relative transmittance of Yb2O3 material sheets under different irradiation powers of 980nm excitation light;

[0040] Figure 7 Two laser beams irradiate a powder sample of Yb₂O₃ to achieve intrinsic optical bistability.

[0041] The excitation light was a 5W 808nm continuous laser, and the induction laser was a 980nm pulsed laser (average power 10W, repetition rate 10Hz, pulse width 40ms). Both lasers were focused on the same point on the sample. When only the 5W 808nm laser was used, the sample did not exhibit a photo-induced blackbody effect and remained in a dark, non-emitting state. When the 980nm pulsed laser was simultaneously activated, the sample exhibited new optical absorption at 808nm, and the scattered light intensity decreased slightly. After approximately 10 seconds, the sample entered a photo-induced blackbody state, with a sudden increase in luminescence and a sudden decrease in scattering at 808nm. At this point, removing the 980nm pulsed laser resulted in the sample remaining stably in a photo-induced blackbody radiation state (bright state), meaning that excitation by the 5W 808nm laser alone could maintain the sample in a bright state. When the 808nm laser was momentarily blocked, the photo-induced blackbody effect immediately disappeared, and the sample returned to a dark, non-emitting state under 5W 808nm laser irradiation.

[0042] Figure 8 Photographs of ceramics prepared by laser-induced photo-blackbody absorption;

[0043] a: Photo of ceramic clay mixed with Yb2O3; b: Photo of the ceramic clay transformed into ceramic after being irradiated with a 10W 980nm laser. Detailed Implementation

[0044] To clearly and completely describe the technical solution and its specific working process of the present invention, the specific embodiments of the present invention are as follows, in conjunction with the accompanying drawings:

[0045] Example 1

[0046] This embodiment provides a preparation method based on the photoinduced blackbody absorption effect, which specifically includes the following steps:

[0047] Step 1: Preparation of Y2O3 material thin films;

[0048] All chemicals are analytical grade and require no further purification before use. Yttrium oxide (Y₂O₃, 99.99%) was supplied by Aladdin Reagents, Shanghai.

[0049] Place 5 mmol of powder into a tablet mold with a diameter of 12 mm, pressurize to 8 t using a BJ-15 flat tablet press (Tianjin, China), maintain the pressure for 20 s, release the pressure, and remove the tablet (approximately 2 mm thick).

[0050] Step 2: Use light-induced light to dramatically increase the light absorption of the material;

[0051] By irradiating a thin film of Y₂O₃ material with a high-power 980 nm laser, and adjusting the excitation light power, the Y₂O₃ material film undergoes photoinduced blackbody radiation, thereby producing strong optical absorption characteristics. For example... Figure 1As shown, Figure 1 Images show Y₂O₃:0.7%Yb material thin films excited by 980 nm excitation light at different powers. The images show that when the 980 nm excitation light power exceeds 10 W, it surpasses the threshold for photoinduced blackbody radiation, and the Y₂O₃:0.7%Yb material thin film suddenly emits bright white light. Further increasing the pump power not only increases the luminescence intensity but also changes the emission color from yellow to white. (Comparison) Figure 1 a and Figure 1 As can be seen from h, there was no significant change in the material before and after excitation.

[0052] Step 3: Measure the absorption of the material at 980 nm after it has been photoinduced;

[0053] Then, using an 808 nm laser as the excitation source, the absorptivity of the material at 980 nm was obtained. Under irradiation with an 808 nm high-power laser, the optical absorption at 980 nm of the Y₂O₃ material sheet before and after photoinduced blackbody radiation was measured. Figure 3 As shown, under the irradiation of a 15W 808 nm laser, the Y2O3 material sheet exhibits photoinduced blackbody radiation. The intensity of the 980 nm scattered laser is significantly weaker than that without excitation light, indicating that the material has strong optical absorption (over 90%) at 980 nm.

[0054] Example 2

[0055] Select a suitable excitation source based on different materials to induce blackbody absorption;

[0056] By irradiating a Yb2O3 material sheet with a high-power 980nm laser, and adjusting the excitation light power, the Yb2O3 material sheet undergoes photoinduced blackbody absorption, thereby generating strong optical absorption characteristics.

[0057] The wavelength range in which the optical absorption of the probe material is enhanced after being photoinduced;

[0058] To investigate the wavelength range of enhanced absorption, the intensity of scattered laser light at different wavelengths was examined. A pump laser (980 nm, 30 W) and six low-power (~100 mW) probe lasers (266 nm, 405 nm, 532 nm, 650 nm, 808 nm, and 1560 nm) were simultaneously irradiated onto a Yb₂O₃ sheet. When the sample became a bright blackbody under the pump laser irradiation, the scattering intensity of the six probe lasers suddenly decreased significantly, as shown in the image. Figure 4 As shown in c, this indicates that the sample exhibits strong optical absorption over a wide spectral range. Figure 4 As shown in d, the absorption rates of the six probe lasers are all above 90%, exhibiting obvious blackbody absorption characteristics. Figure 4Figure a shows the changes in luminescence and 980nm laser scattering intensity of the Yb2O3 material sheet before and after the appearance of light-induced blackbody absorption. Figure 4 The 'b' represents a schematic diagram of the avalanche luminescence process;

[0059] The transmission spectrum of Yb2O3 material thin films under excitation light irradiation was tested;

[0060] When a Yb₂O₃ thin sheet undergoes photoinduced blackbody absorption under 980 nm excitation light, it is not only a bright emitter but also an excellent absorber. In this case, the intense white light emitted by the photoinduced blackbody absorption significantly interferes with our measurements of transmission and absorption spectra. To avoid this interference, a transmission and absorption spectral measurement and detection system based on a latch-up amplifier and an optical chopper was established, such as… Figure 5 As shown. The system uses a halogen lamp with a broadband spectrum as the light source. An optical chopper modulates the probe light transmitted through a Yb₂O₃ thin film. The modulated light is detected by a photomultiplier tube (PMT) on a 1000M spectrometer and converted into a photocurrent signal. A lock-in amplifier is used to amplify the transmitted signal. The transmission spectra of the Yb₂O₃ thin film are obtained by comparing the transmission signals with and without excitation light under 980nm excitation light irradiation at different powers, as shown. Figure 6 As shown in a. The corresponding relative transmittance (transmittance ratio) is calculated from the transmission spectrum, as shown in Figure a. Figure 6 As shown in b, it can be seen that after the thin-film sample enters the photoinduced blackbody radiation state, it exhibits extremely strong optical absorption in the range of 500–1500 nm, which is consistent with the results we obtained using scattered laser.

[0061] Example 3

[0062] The Yb2O3 thin film was irradiated with a 5W 808nm laser and a 980nm pulsed laser, and the intensity of the 808nm scattered light from the Yb2O3 thin film was monitored with a Haiguang optical spectrometer.

[0063] The intensity of the scattered light at 808 nm was observed by turning the 980 nm laser on and off. The experimental results are as follows: Figure 7 As shown, Yb₂O₃ exhibits very low absorption of light at 808 nm but very high absorption of light at 980 nm. Neither a 5W 808nm laser nor a 980nm pulsed laser alone can induce the Yb₂O₃ sheet to enter a photo-induced blackbody absorption state. However, when both lasers are used simultaneously, the material enters this state after a very short period of irradiation. At this point, the intensity of the scattered light at 808 nm, as monitored by the spectrometer, rapidly decreases, indicating that the Yb₂O₃ in the photo-induced blackbody absorption state strongly absorbs the 808nm laser light.

[0064] Example 4

[0065] This embodiment provides a method for laser-assisted 3D printing of ceramics based on the photoinduced blackbody absorption effect, specifically including the following steps:

[0066] Step 1: Modify the ceramic clay raw material using photo-induced blackbody absorbing materials;

[0067] By doping the ceramic clay raw material with a photoinduced blackbody absorbing material whose absorptivity matches the induced laser wavelength, the ceramic material is endowed with photoinduced blackbody absorption characteristics.

[0068] In this embodiment, ceramic clay and Yb2O3 powder were thoroughly mixed at a mass ratio of 95:5, and the ceramic clay was coated onto a glass slide to a thickness of approximately 1 mm. The resulting photograph is shown below. Figure 8 As shown in a.

[0069] Step 2: Place the prepared printing material into the extruder of the 3D printer;

[0070] Step 3: Adjust the auxiliary laser spot using an optical collimation and focusing system so that the laser spot is focused on the 3D printing material that has just been extruded from the 3D printer's extruder head; the process of the 3D printer's extruder head extruding the 3D printing material is synchronized with the laser-assisted irradiation, and the spatial distance between the exit of the 3D printer's extruder head and the laser focused spot is 2mm to 10mm.

[0071] Step 4: Import the data of the model to be printed into the 3D printer;

[0072] Step 5: The 3D printer prints according to the preset path. After the modified ceramic clay is extruded from the exit of the 3D printer, the inducing laser first irradiates the freshly extruded modified ceramic raw material. The material is degreased and enters the photoinduced blackbody absorption state. At this time, the absorption rate of the material to the processing laser increases instantly, the temperature of the material rises and exceeds the melting point of the ceramic material. After the laser spot is removed, the ceramic clay material is transformed into ceramic. The laser-assisted 3D printer repeats the above operation continuously, and finally forms a 3D printed ceramic device.

[0073] In this embodiment, a 10W 980nm laser is used to irradiate the ceramic clay described in step two, causing it to enter a photoinduced blackbody absorption state. The irradiated laser spot emits a dazzling white light, and the material temperature rises rapidly, accompanied by ceramization. The laser spot is moved along the desired path to ceramize the desired portion and form the desired pattern. A photograph of the ceramized sample after irradiation is shown below. Figure 8 As shown in b.

[0074] Thanks to the extremely high absorption rate of the working laser by the ceramic raw material in its photo-blackbody state, the efficiency of laser processing is greatly improved. This increased efficiency allows extrusion molding, debinding, and pre-firing to be performed simultaneously. Compared to existing ceramic 3D printing technologies, this invention's laser 3D printing method compresses the original 3D printing molding, debinding, and firing processes into just two steps: 3D printing and firing, significantly reducing device processing time. Simultaneously, the material used in this method is pre-fired ceramic, resulting in higher structural strength and adaptability to larger-sized prints. Furthermore, this invention's laser 3D printing method for ceramics involves layer-by-layer printing, leading to lower porosity due to debinding. The printed material, having undergone pre-firing during laser printing, exhibits lower shrinkage, resulting in higher precision and mechanical strength.

[0075] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0077] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect, characterized in that, Specifically, the steps include the following: Step 1: Modify the ceramic clay raw material using photo-induced blackbody absorbing materials; By doping the ceramic clay raw material with a photoinduced blackbody absorbing material whose absorptivity matches the induced laser wavelength, the ceramic material is endowed with photoinduced blackbody absorption characteristics. Step 2: Place the prepared printing material into the extruder of the 3D printer; Step 3: Adjust the auxiliary laser spot using an optical collimation and focusing system so that the laser spot is focused on the 3D printing material that has just been extruded from the 3D printer's extruder head; the process of the 3D printer's extruder head extruding the 3D printing material is synchronized with the laser-assisted irradiation, and the spatial distance between the exit of the 3D printer's extruder head and the laser focused spot is 2mm to 10mm. Step 4: Import the data of the model to be printed into the 3D printer; Step 5: The 3D printer prints according to the preset path. After the modified ceramic clay is extruded from the exit of the 3D printer, the inducing laser first irradiates the freshly extruded modified ceramic raw material. The material is degreased and enters the photoinduced blackbody absorption state. At this time, the absorption rate of the material to the processing laser increases instantly, the temperature of the material rises and exceeds the melting point of the ceramic material. After the laser spot is removed, the ceramic clay material is transformed into ceramic. The laser-assisted 3D printer repeats the above operation continuously, and finally forms a 3D printed ceramic device.

2. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 1, characterized in that, Step 1: The raw materials for the ceramic clay are kaolin, porcelain stone, Xuyong clay, bentonite, and pyrophyllite; the photoluminescent blackbody absorbing material is a material with an absorption rate of greater than 0.1% for the working laser.

3. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 1, characterized in that, The photo-induced blackbody absorbing material includes, but is not limited to, polymers containing rare earth elements or transition metal elements, quantum dots, or gold nanoparticles.

4. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 3, characterized in that, The rare earth element includes Yb 3+ Er 3+ 、Nd 3+ 、Tb 3+ Eu 3+ The transition metal element includes Fe. 3+ Cr 3+ Ni 3+ The gold nanoparticles include ZnS, ZnO, MnS, and ZnSe.

5. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 1, characterized in that, In step one, the ceramic clay raw material and the photoluminescent blackbody absorber are mixed evenly at a mass ratio of 98:2 to 90:10 to obtain the prepared printing material.

6. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 1, characterized in that, In step three, a single-beam laser is used to assist in the 3D printing of ceramic devices, or two laser beams are used. When using a single laser beam, the power is 1W-5W. When using two laser beams, one laser beam has a low power (less than 5W) and the other laser beam has a high power (greater than 5W).

7. The method for laser-assisted 3D printing of ceramics based on photoinduced blackbody absorption effect as described in claim 1, characterized in that, In step three, the laser that generates the laser includes a semiconductor laser, a solid-state laser, or a fiber laser; the laser used is a continuous, quasi-continuous, or pulsed laser; and the working wavelength of the laser is between 200 nm and 2500 nm.

Images