High concentration non-bridging oxygen coordinated silver ion information storage glass and preparation method thereof

Abstract

This invention discloses a high-concentration non-bridging oxygen coordinated silver ion information storage glass and its preparation method. The components, by molar percentage, are: network-forming cation (P) 20-35%; network intermediate cations (Al, Mg, and Zn) 30-45%; network exogenous cations (Zn and Mg) 15-25%; activator silver ions 10-20%; bridging oxygen (between phosphorus and oxygen tetrahedra and between phosphorus and oxygen tetrahedra and network intermediate tetrahedra) ratio 80-90%; and non-bridging oxygen (connecting network exogenous Mg and Zn) ratio 10-20%. This fluorescent glass is prepared by high-temperature melting and then processed by femtosecond laser, exhibiting a low laser damage threshold. The Ag content in the glass is... + It exhibits high laser sensitivity and high chemical stability. This invention develops a nanojoule femtosecond laser-responsive high-concentration non-bridging oxygen-coordinated silver ion information storage glass.

Description

Technical Field

[0001] This invention belongs to the field of information storage glass, and particularly relates to a high-concentration non-bridging oxygen coordinated silver ion information storage glass and its preparation method. Background Technology

[0002] With the widespread adoption of 5G communication technology, humanity is entering a smart, interconnected era of big data. According to International Data Corporation (IDC), the world will generate 175 ZB of data annually by 2025. All current storage methods—magnetic, electrical, and optical—suffer from low storage density, high maintenance costs, and short lifespans. The explosive growth of massive amounts of data will lead to serious problems such as power consumption and space occupation. Therefore, the development of new high-density and highly reliable information storage technologies is urgently needed. Recently, the rapid development of femtosecond laser technology holds promise for cleverly resolving the contradiction between the photosensitivity required for high-speed read / write operations and the stability required for long lifespan in large-capacity optical storage materials. Femtosecond lasers have very narrow pulse widths, and after focusing, their energy density reaches as high as 10^6 kilobytes per second. 14 -10 15 W / cm 2 This exceeds the Coulomb field strength of a hydrogen atom. Therefore, near the focal point, even if the material itself does not have intrinsic absorption at the laser wavelength, it will undergo highly selective microstructural modification due to nonlinear reactions such as laser-induced multiphoton absorption and multiphoton ionization, thus endowing the material with unique optical functions. This advantage is unmatched by other laser sources (traditional continuous and long-pulse lasers).

[0003] Fluorescent silver quantum clusters, [Ag m ] x+ It is a type of molecular cluster composed of several to dozens of silver atoms or ions, and is also a novel, efficient, multi-level femtosecond laser-induced fluorescence information carrier. [Ag] m ] x+ With sub-nanometer dimensions comparable to the electron Fermi wavelength, a molecular-like energy level structure determined by quantum confinement effects, and highly efficient molecular-like fluorescence, it exhibits low optical sensitivity suitable for low-power femtosecond laser writing. Its valence state is relatively easy to control, and the raw material cost is also low. Therefore, as a low-threshold fluorescent active center, it is considered a superior choice for quantum clusters with overall performance compared to other noble metals such as copper, gold, and platinum. Meanwhile, inorganic glass is considered one of the best media materials for femtosecond laser information storage, possessing excellent physicochemical stability, particularly low optical sensitivity and a high laser damage threshold. Due to the fluorescence [Ag... m ] x+ Quantum clusters exhibit high chemical reactivity, thus dispersing them within a glass network is beneficial for stabilizing their size distribution and fluorescence properties. Therefore, femtosecond lasers can be used to... (The sentence is incomplete and requires further context to be fully translated.) + Spatially resolved microstructure rewriting in glass, Ag+ Electrons readily accepting laser-induced ionization are reduced and aggregate to grow into fluorescent [Ag] m ] x+ Quantum clusters.

[0004] The mechanism of femtosecond laser-induced silver quantum cluster formation is as follows: When the initial series of femtosecond laser pulses interact with the glass mechanism, Ag+ and the phosphate matrix generate a large number of free electrons through multiphoton absorption. These free electrons lead to the formation of Ag+ ions. 0 Formation (Ag) + +e - →Ag 0 The reaction rate depends on the doping concentration and the degree of electron diffusion. Increasing the energy of a single-pulse micro-focal laser compared to a nano-focal laser leads to an increase in peak pulse power, resulting in a higher probability of multiphoton absorption ionization, the formation of more silver quantum clusters, and an increase in the diameter and intensity of photoluminescence. For optical storage applications, a smaller emission diameter and reduced interlayer crosstalk allow for greater information storage capacity with the same material size. Therefore, increasing the Ag content in the glass system... + The concentration of Ag in glass is favorable. + The increased sensitivity to femtosecond lasers enables the storage of information at the single-pulse, nanojoule level, and with a emission diameter of 1 μm. Summary of the Invention

[0005] In view of this, the present invention provides a high-concentration non-bridging oxygen coordinated silver ion information storage glass and its preparation method.

[0006] In a first aspect, embodiments of the present invention provide a high-concentration non-bridged oxygen-coordinated silver ion information storage glass molar percentage meter, wherein the cations and anions contained therein have the following stoichiometric ratios:

[0007] 1) The network-forming cations, network intermediate cations, network exosome cations, and activator silver ions have the following stoichiometric ratios:

[0008]

[0009] Among them, the network-forming cation is P. 5+ The network intermediate cation is Al. 3+ Mg 2+ and Zn 2+ At least one of them; the network exosome cation is Mg 2+ and Zn 2+ At least one of them;

[0010] 2) Anions have the following stoichiometric ratios:

[0011] O 2- 80-90%

[0012] F - 10-20%

[0013] 3) The Ag element has the following stoichiometric ratio:

[0014] Ag + 40-70% ions

[0015] Ag atoms 30-60%

[0016] Secondly, embodiments of the present invention provide a method for preparing a high-concentration non-bridging oxygen coordinated silver ion information storage glass, comprising the following steps:

[0017] (1) Weigh the required mass of the oxide or fluoride powder raw material corresponding to the cation according to the molar percentage ratio;

[0018] (2) Mix the corresponding oxide or fluoride powder raw materials of the cation evenly, melt them and pour them into a mold to form glass blocks, and anneal them to remove internal stress.

[0019] (3) Using a 1030nm femtosecond laser, inscriptions are made on the glass surface at a predefined depth. The inscriptions are made of Ag through the interaction between the femtosecond laser pulses and the glass. + Silver clusters with a molecular-like structure composed of ions and Ag atoms.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) This invention can form [AlO4] by rationally introducing raw materials such as ZnF2, MgF2 and AlF3. - [MgO4] 2- and [ZnO4] 2- Negatively charged tetrahedral units improve the connectivity of the glass three-dimensional network, while Ag... + Ions act as charge compensators for these tetrahedra, promoting uniform distribution, and can also form [ZnO6], [MgO6], and [AlO6], generating a large number of non-bridging oxygen-linked Ag atoms. + Ions; high concentration of non-bridging oxygen; a solubility strategy involves introducing fluorides into pure oxide glasses to break fluorophosphate bonds, generating a large amount of non-bridging oxygen and Ag. + The connection allows for a higher concentration of silver ions.

[0022] (2) The glass network is highly sensitive to lasers. The formation of a large number of non-bridged oxygen and fluoride in the glass network results in a low laser damage threshold for the glass, which can achieve ion rearrangement in the network structure with a single pulse at a low energy. Attached Figure Description

[0023] Figure 1This is the O1s energy spectrum of the XPS of the glass sample provided in the embodiment of the present invention;

[0024] Figure 2 This is the Ag 3d energy dispersive X-ray spectroscopy (EDS) spectrum of the glass sample provided in this embodiment of the invention.

[0025] Figure 3 This is a confocal microscope image obtained under a stable pulse width laser (169 fs 200 kHz) according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the fluorescence intensity at different excitation energies and pulse numbers under stable pulse width laser (169 fs 200 kHz) provided in an embodiment of the present invention;

[0027] Figure 5 This refers to the EDX energy spectrum and elemental composition of the glass provided in the embodiments of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the features in the following embodiments and implementation methods can be combined with each other.

[0030] According to the random network theory of glass, in the fluoroaluminophosphate glass of this invention, the glass mainly contains [PO4]. + [AlO4] - , of which [PO4] + The Q2 and Q1 atoms mainly form a chain-like structure, [AlO4]. - Q4 and Q3 can connect different phosphorus oxygen chains, thus improving the three-dimensional connectivity of the phosphorus oxygen network. This increases Ag... + The concentration in glass can be achieved through two strategies: (1) by introducing negatively charged [AlO4] into the glass system. - [YO4] - [ZnO4] 2- [MgO4] 2- Tetrahedrons can significantly improve the dispersion uniformity of Ag and enhance Ag... + / (Ag + +Ag 0 (2) The formation of [P(O,F)4] in the glass system breaks the glass network, increasing the proportion of non-bridging oxygen, due to Ag +It can also coordinate with non-bridging oxygen, thus improving the Ag content of the glass system. + Solubility, i.e., the formation of an increase in Ag in the glass system + / (Ag + +Ag 0 This invention realizes a high-concentration non-bridging oxygen-coordinated silver ion information storage glass density information, which can provide a new material basis for the development of low-energy-consumption high-density information storage technology.

[0031] This invention provides a high-concentration non-bridged oxygen-coordinated silver ion information storage glass, wherein the cations and anions contained therein have the following stoichiometric ratios by molar percentage:

[0032] 1) The network-forming cations, network intermediate cations, network exosome cations, and activator silver ions have the following stoichiometric ratios:

[0033]

[0034] Among them, the network-forming cation is P. 5+ The network intermediate cation is Al. 3+ Mg 2+ and Zn 2+ At least one of them; the network exosome cation is Mg 2+ and Zn 2+ At least one of them;

[0035] 2) Anions have the following stoichiometric ratios:

[0036] O 2- 80-90%

[0037] F - 10-20%

[0038] 3) The Ag element has the following stoichiometric ratio:

[0039] Ag + 40-70% ions

[0040] Ag atoms 30-60%

[0041] Among them, the stoichiometric ratios of bridging oxygen and non-bridging oxygen, expressed as a percentage by molar, are as follows:

[0042] 80-90% of bridging oxygen anions

[0043] Non-bridging oxygen anions 10-20%

[0044] Among them, the bridging oxygen anion is an O that is simultaneously coordinated with two network-forming cations and / or network intermediate cations. 2-Non-bridging oxygen anions represent O that is simultaneously coordinated with one network-forming cation and one network exocation. 2- Or simultaneously form a network cation and an Ag + ion-coordinated O 2- .

[0045] This invention also provides a method for preparing a high-concentration non-bridging oxygen coordinated silver ion information storage glass, comprising the following steps:

[0046] (1) Weigh the required mass of the oxide or fluoride powder raw materials corresponding to the cation according to the molar percentage ratio; wherein, the oxide or fluoride powder raw materials corresponding to the cation include: P2O5, Al2O3, MgF2, ZnF2 and / or Ag2O.

[0047] (2) Mix the corresponding oxide or fluoride powder raw materials of the cation evenly, put them into a box furnace at 1300-1500℃ for heat preservation and melting for 0.5-2 hours, pour them into a mold to form glass blocks, and place them in a box furnace at 300-400℃ for heat preservation for 1-4 hours to anneal and remove internal stress.

[0048] (3) Using a 1030nm femtosecond laser, inscription is made at a predefined depth downwards from the glass surface (in this example, the inscription is made at a depth of 100μm downwards from the glass surface). The inscription is made by the interaction between the femtosecond laser pulse and the glass, and Ag is formed. + Silver clusters with a molecular-like structure composed of ions and Ag atoms.

[0049] Next, the high-concentration non-bridging oxygen coordinated silver ion information storage glass provided by the present invention will be further described with reference to the embodiments.

[0050] Figure 1 The O1s energy spectrum of the XPS of the glass sample is shown; the orange line represents the bridging oxygen with POP bonds, the red line represents the bridging oxygen of the network intermediate, and the blue line represents the non-bridging oxygen connected to silver. Figure 2 The XPS 3d energy dispersive spectroscopy (EDS) spectra of Ag in the glass sample are shown; the red line represents Ag. 0 The blue line represents Ag. + . Figure 3 The confocal microscopy images under stable pulse width laser (169 fs 200 kHz) are shown; from left to right, the horizontal axis represents the energy at 32 nJ, 40 nJ, 50 nJ, 62 nJ, 78 nJ, 98 nJ and 125 nJ, and the vertical axis represents the number of pulses at 1, 2, 3, 4, 8, 16, 32 and 64. Figure 4 This is a schematic diagram of the fluorescence intensity at different excitation energies and pulse numbers under a stable pulse width laser (169fs 200kHz) provided in an embodiment of the present invention. Figure 5This refers to the EDX energy spectrum and elemental composition of the glass provided in the embodiments of the present invention.

[0051] Example 1

[0052] Step S1: Weigh the required mass of P2O5, Al2O3, Ag2O, and MgF2 powder raw materials according to the molar percentage ratio; mix the P2O5, Al2O3, Ag2O, MgF2, and ZnF2 powder raw materials evenly and place them in an alumina crucible. In this composition, Ag2O accounts for 5% of the total molar amount of the phase-separated fluorophosphate, MgF2 and ZnF2 each account for 12.5% ​​of the total molar amount of the fluorophosphate, and P2O5 and Al2O3 account for 50% and 20%, respectively.

[0053] Step S2: Place the glass block in a box furnace at 1450℃ for 45 minutes to heat and melt. Pour it into a mold to form a glass block. Place the glass block at 300℃ for 4 hours to remove internal stress. Polish the glass to a surface of 3000 mesh and then perform femtosecond laser micro-area processing. Then take the powder to test XRD and observe the processed area under a confocal microscope.

[0054] After measurement, such as Figure 1 As shown in (a) and Table 1, the POP bridging oxygen content in the XPS of this glass is 26.8%, and the POM (Zn, Mg, and Al) network intermediate bridging oxygen content in the glass is 54.7%. Figure 2 As shown in (a) and Table 2, the proportion of non-bridged oxygen bonded to silver in the glass is 18.5%, and the proportion of Ag+ in the glass is 59.2%. Figure 5 As shown in (a), the EDX spectrum contains O, F, Al, P, Ag, Zn, and Mg elements. Figure 3 (a) and Figure 4 As shown in (a), the glass exhibits the strongest fluorescence intensity at 32 nJ per pulse, with a relative intensity value of 3.089 counts, as observed by confocal microscopy. This example glass possesses the highest concentration of non-bridging oxygen and Ag+, exhibiting the highest sensitivity to femtosecond lasers and enabling information storage at relatively low laser energies.

[0055] Example 2

[0056] Step S1: Weigh the required mass of P2O5, Al2O3, Ag2O, and ZnF2 powder raw materials according to the molar percentage ratio; mix the P2O5, Al2O3, Ag2O, and ZnF2 powder raw materials evenly and place them in an alumina crucible. In this composition, Ag2O accounts for 5% of the total molar amount of the phase-separated fluorophosphate, ZnF2 accounts for 20% of the total molar amount of the fluorophosphate, and P2O5 and Al2O3 account for 55% and 20%, respectively.

[0057] Step S2: The glass is then placed in a box furnace at 1450℃ for 45 minutes for heat preservation and melting. It is then poured into a mold to form a glass block. The glass block is placed at 300℃ for 4 hours to remove internal stress. The glass is then polished to a surface of 3000 mesh and then processed by femtosecond laser micro-area processing. The powder is then tested for XRD, and the processed area is observed under a confocal microscope.

[0058] After measurement, such as Figure 1 As shown in (b) and Table 1, the POP bridging oxygen content in the XPS of this glass is 29%, and the POM (Zn and Al) network intermediate bridging oxygen content in the glass is 58.1%. Figure 2 As shown in (b) and Table 2, the proportion of non-bridged oxygen bonded to silver in the glass is 12.9%, and the proportion of Ag+ in the glass is 53.14%. Figure 5 As shown in (b), the EDX spectrum contains O, F, Al, P, Ag, and Zn elements, as shown in Figure (b). Figure 3 (b) and Figure 4 As shown in (b), confocal microscopy revealed that the glass still exhibited fluorescence intensity at 32 nJ for one pulse, with a relative intensity value of 0.844 counts.

[0059] Example 3

[0060] Step S1: Weigh the required mass of P2O5, Al2O3, Ag2O, and AlF3 powder raw materials according to the molar percentage ratio; mix the P2O5, Al2O3, Ag2O, and MgF2 powder raw materials evenly and place them in an alumina crucible. In this composition, Ag2O accounts for 5% of the total molar amount of the phase-separated fluorophosphate, MgF2 accounts for 20% of the total molar amount of the fluorophosphate, and P2O5 and Al2O3 account for 55% and 20%, respectively.

[0061] Step S2: The glass is then placed in a box furnace at 1450℃ for 45 minutes for heat preservation and melting. It is then poured into a mold to form a glass block. The glass block is placed at 300℃ for 4 hours to remove internal stress. The glass is then polished to a surface of 3000 mesh and then processed by femtosecond laser micro-area processing. The powder is then tested for XRD, and the processed area is observed under a confocal microscope.

[0062] After measurement, such as Figure 1 As shown in (c) and Table 1, the POP bridging oxygen content in the XPS of this glass is 30.1%, and the POM (Zn and Al) network intermediate bridging oxygen content in the glass is 55.3%. Figure 2 As shown in (c) and Table 2, the proportion of non-bridged oxygen bonded to silver in the glass is 14.6%, and the proportion of Ag+ in the glass is 54.95%. Figure 5As shown in (c), the EDX spectrum contains O, F, Al, P, Ag, and Mg elements, as shown in (c). Figure 3 (c) and Figure 4 As shown in (c), confocal microscopy revealed that the glass exhibited a weak fluorescence intensity at 32 nJ per pulse, with a relative intensity value of 2.651 counts.

[0063] Example 4

[0064] Step S1: Weigh the required mass of P2O5, Al2O3, Ag2O, and MgF2 powder raw materials according to the molar percentage ratio; mix the P2O5, Al2O3, Ag2O, and AlF3 powder raw materials evenly and place them in an alumina crucible. In this composition, Ag2O accounts for 5% of the total molar amount of the phase-separated fluorophosphate, AlF3 accounts for 20% of the total molar amount of the fluorophosphate, and P2O5 and Al2O3 account for 55% and 20%, respectively.

[0065] Step S2: Place the glass block in a box furnace at 1450℃ for 45 minutes to heat and melt. Pour it into a mold to form a glass block. Place the glass block at 300℃ for 4 hours to remove internal stress. Polish the glass to a surface of 3000 mesh and then perform femtosecond laser micro-area processing. Then take the powder to test XRD and observe the processed area under a confocal microscope.

[0066] After measurement, such as Figure 1 As shown in (d) and Table 1, the POP bridging oxygen content in the XPS of this glass is 25.3%, and the POM (Zn and Al) network intermediate bridging oxygen content in the glass is 64.4%. Figure 2 As shown in (d) and Table 2, the proportion of non-bridged oxygen bonded to silver in the glass is 10.3%, and the Ag content in the glass is... + The proportion was 51.10%. For example... Figure 5 As shown in (d), the EDX spectrum contains O, F, Al, P, Ag, and Zn elements, as shown in (d). Figure 3 (d) and Figure 4 As shown in (d), confocal microscopy of the glass showed that the glass still had fluorescence intensity at 32 nJ for one pulse, and the relative intensity value was 0.572 counts.

[0067] Table 1: Bridging oxygen (BO), non-bridging oxygen (NBO), silver ion (Ag) + ) and silver atoms (Ag) 0 ) proportion

[0068] Brix (BO) Non-bridging oxygen (NBO) <![CDATA[Silver ion (Ag + )]]> <![CDATA[Silver atom (Ag 0 )]]> Example 1 81.5％ 18.5％ 59.20％ 40.80％ Example 2 87.1％ 12.9％ 53.14％ 46.86％ Example 3 86.2％ 13.8％ 54.95％ 45.05％ Example 4 89.7％ 10.3％ 51.10％ 48.90％

[0069] Table 2: Atomic percentage of each element (O, F, Al, P, Ag, Zn and Mg)

[0070] Atomic percentage (%) Example 1 Example 2 Example 3 Example 4 O 59.06 66.98 66.36 65.63 F 0.93 0.3 0.98 0.12 Al 9.20 7.99 9.35 8.51 P 27.19 21.42 19.41 23.04 Ag 1.49 0.96 1.41 1.22 Zn 1.14 2.35 0 1.49 Mg 0.98 0 2.50 0

[0071] As shown in Tables 1 and 2, the concentration ratio of non-bridging oxygen and silver ions in the glass was Example 1 > Example 3 > Example 2 > Example 4, and the percentage of Ag atoms in the EDX spectrum was also Example 1 > Example 3 > Example 2 > Example 4. This indicates that the concentration of non-bridging oxygen in the glass is positively correlated with the concentration of silver ions. The large amount of non-bridging oxygen cations Zn, Al and Mg in the glass leads to the generation of a large amount of non-bridging oxygen. Glass systems with high non-bridging oxygen concentrations are more sensitive to femtosecond lasers and can achieve laser writing with lower single-pulse energy, thus reducing the energy consumption of femtosecond laser storage.

[0072] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only.

[0073] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A high-concentration non-bridging oxygen-coordinated silver ion information storage glass, characterized in that, According to the molar percentage meter, the cations and anions contained have the following stoichiometric ratios: 1) The network-forming cation, network intermediate cation, network exosome cation, and activator silver ion have the following stoichiometric ratio: Network-forming cations 20-35% Network intermediate cations 30-45% Network exosome cations 15-25% Ag 10~20% Among them, the network-forming cation is P. 5+ The network intermediate cation is Al. 3+ Mg 2+ and Zn 2+ At least one of them; the network exosome cation is Mg 2+ and Zn 2+ At least one of them; 2) Anions have the following stoichiometric ratios: O 2- 80~90% F - 10~20% 3) The Ag element has the following stoichiometric ratio: Ag + 40-70% ions Ag atoms: 30-60%.

2. The high-concentration non-bridging oxygen-coordinated silver ion information storage glass as described in claim 1, characterized in that, On a molar percentage basis, the stoichiometric ratios of bridging oxygen and non-bridging oxygen are as follows: 80-90% of bridging oxygen anions Non-bridging oxygen anions: 10-20% Among them, the bridging oxygen anion is an O that is simultaneously coordinated with two network-forming cations and / or network intermediate cations. 2- ; Non-bridged oxygen anions represent O that is simultaneously coordinated with one network-forming cation and one network exocation. 2- Or simultaneously form a network cation and an Ag + ion-coordinated O 2- .

3. A method for preparing a high-concentration non-bridging oxygen-coordinated silver ion information storage glass according to any one of claims 1-2, characterized in that, Includes the following steps: (1) Weigh the required mass of the oxide or fluoride powder raw material corresponding to the cation according to the molar percentage ratio; (2) Mix the corresponding oxide or fluoride powder raw materials of the cation evenly, melt them and pour them into the mold to form glass blocks, and anneal them to remove internal stress; (3) Using a 1030nm femtosecond laser, writing is performed on the glass surface at a predefined depth. The interaction between the femtosecond laser pulse and the glass is used to write the Ag-based material. + Silver clusters with a molecular-like structure composed of ions and Ag atoms.

4. The method for preparing a high-concentration non-bridging oxygen-coordinated silver ion information storage glass according to claim 3, characterized in that, Place it in a box furnace at 1300~1500°C for heat preservation and melting for 0.5~2 hours.

5. The method for preparing a high-concentration non-bridging oxygen-coordinated silver ion information storage glass according to claim 3, characterized in that, Annealing is performed by placing the product in a box furnace at 300-400°C for 1-4 hours to remove internal stress.

6. The method for preparing a high-concentration non-bridging oxygen-coordinated silver ion information storage glass according to claim 3, characterized in that, A 1030nm femtosecond laser was used to etch a 100μm depth downwards on the glass surface.

7. The method for preparing a high-concentration non-bridging oxygen-coordinated silver ion information storage glass according to claim 3, characterized in that, The corresponding oxide or fluoride powder raw materials for cations include: P2O5, Al2O3, MgF2, ZnF2 and Ag2O.

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