CN114031299B - Method for reducing hygroscopicity of glass powder - Google Patents
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- CN114031299B CN114031299B CN202111495572.8A CN202111495572A CN114031299B CN 114031299 B CN114031299 B CN 114031299B CN 202111495572 A CN202111495572 A CN 202111495572A CN 114031299 B CN114031299 B CN 114031299B
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- 239000011521 glass Substances 0.000 title claims abstract description 132
- 239000000843 powder Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 239000001856 Ethyl cellulose Substances 0.000 claims abstract description 8
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920001249 ethyl cellulose Polymers 0.000 claims abstract description 8
- 235000019325 ethyl cellulose Nutrition 0.000 claims abstract description 8
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 12
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 12
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 239000011701 zinc Substances 0.000 claims description 7
- 229910052810 boron oxide Inorganic materials 0.000 claims description 6
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 6
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 6
- 239000011787 zinc oxide Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 3
- 239000006060 molten glass Substances 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 239000010431 corundum Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C12/00—Powdered glass; Bead compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/006—Surface treatment of glass, not in the form of fibres or filaments, by coating with materials of composite character
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Composite Materials (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a method for reducing hygroscopicity of glass powder, which is characterized in that on the basis of a conventional glass powder preparation process, a finished glass powder is modified by using a coating agent prepared from tetraethoxysilane and ethylcellulose, so that the hygroscopicity of the glass powder can be greatly reduced. The method is simple, and is suitable for glass powder which is easy to absorb moisture and hydrolyze, such as V-Ba-B-Zn system glass powder, ba-Si-Ca-P system glass powder, sn-P-Si system glass powder and the like. The coating agent disclosed by the invention is simple to prepare, low in cost and high in stability, the coating agent is not decomposed under the condition of 25-80 ℃ for a long time, and ethyl cellulose dissolved in tetraethoxysilane is not separated out; the moistureproof effect of the glass powder treated by the coating agent is obviously improved, and the coating agent is completely decomposed and volatilized when the treated glass powder is sintered at the temperature of more than 500 ℃.
Description
Technical Field
The invention belongs to the technical field of powder material processing, and particularly relates to a method for effectively reducing hygroscopicity of glass powder, so that the glass powder can keep moisture resistance for a long time.
Background
With the development of science and technology and age, glass powder has high transparency, large hardness, uniform particle size distribution, good dispersibility, easy dissolution with other components in organic systems such as resin, paint and the like, easy processing, good adhesion, certain acid resistance, alkali resistance and other excellent characteristics, and is widely used in the fields of chemical industry, electronic components, food processing, mechanical manufacturing and the like; the glass powder has high moisture absorption speed and is easy to hydrolyze, so that the original excellent characteristics of the glass powder are lost. The V-Ba-B-Zn system glass powder, the Ba-Si-Ca-P system glass powder and the Sn-P-Si system glass powder are widely applied to thick film circuits, but the glass powder is easy to hydrolyze after moisture absorption, so that the performance of the glass powder is changed, the quality of the whole thick film circuit is affected, and a method for reducing the hygroscopicity of the glass powder is needed to be found.
Disclosure of Invention
The invention aims to provide a method for reducing hygroscopicity of glass powder, so that influence of moisture on the characteristics of the glass powder can be greatly reduced.
Aiming at the purposes, the technical scheme adopted by the invention comprises the following steps:
1. at normal temperature, adding excessive ethyl cellulose into tetraethoxysilane, continuously stirring until the solution is saturated, and then sieving the solution by using a stainless steel screen to obtain the coating agent.
2. Mixing the ingredients of the glass powder which is easy to absorb moisture and hydrolyze according to the formula, smelting after the ingredients are uniformly mixed, quenching molten glass by using a pair of rollers, ball-milling and sieving cooled glass slag to obtain the glass powder, finally soaking the glass powder in a coating agent, taking out and drying.
In the step 1, the glass powder is soaked in the coating agent for 20-24 hours.
In the step 2, the glass powder which is easy to absorb moisture and hydrolyze is any one of V-Ba-B-Zn system glass powder, ba-Si-Ca-P system glass powder, sn-P-Si system glass powder and the like. Wherein, the V-Ba-B-Zn glass powder comprises, by weight, 35% -50% of vanadium pentoxide, 5% -11% of barium oxide, 6% -10% of boron oxide, 25% -40% of zinc oxide, 1% -3% of aluminum oxide and 2% -7% of bismuth oxide; the Ba-Si-Ca-P system glass powder comprises, by weight, 7% -15% of barium oxide, 20% -45% of silicon dioxide, 7% -15% of calcium oxide, 15% -30% of phosphorus pentoxide, 10% -18% of zinc oxide and 1% -3% of zirconium oxide; the Sn-P-Si system glass powder comprises, by weight, 25% -40% of tin dioxide, 40% -60% of phosphorus pentoxide, 7% -13% of silicon dioxide, 0.5% -2.5% of aluminum oxide and 1% -5% of boron oxide.
In the step 2, the smelting temperature is 900-1250 ℃, and the heat preservation time is 20-60 minutes.
In the step 2, after the cooled glass slag is ball-milled to the granularity D50 of less than 2 mu m, the cooled glass slag is sieved by a stainless steel screen with 80 meshes to separate the spherical materials.
The invention has the following beneficial effects:
the coating agent disclosed by the invention is simple to prepare, low in cost and high in stability, the coating agent is not decomposed under the condition of 25-80 ℃ for a long time, and ethyl cellulose dissolved in tetraethoxysilane is not separated out; the moistureproof effect of the glass powder treated by the coating agent is obviously improved, and when the treated glass powder is sintered at the temperature of more than 500 ℃, the coating agent is completely decomposed and volatilized, metal salt cannot be remained, the performance of the glass powder cannot be influenced, and the glass powder is suitable for the glass powder which is easy to absorb moisture and hydrolyze and is used for thick film circuits such as V-Ba-B-Zn system glass powder, ba-Si-Ca-P system glass powder, sn-P-Si system glass powder and the like, thereby ensuring the quality of the whole thick film circuit.
Detailed description of the preferred embodiments
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to these examples.
Example 1
1. 3kg of ethyl orthosilicate is weighed into a 5L stainless steel barrel, then 1kg of ethyl cellulose is poured into the ethyl orthosilicate, the ethyl cellulose is continuously stirred for 2 hours at normal temperature by using a stirring rod, and then the solution is sieved by using a stainless steel screen with 80 meshes, and excessive undissolved ethyl cellulose is removed, so that the coating agent is obtained.
2. The glass powder comprises the following components in percentage by weight: mixing 42 kg of vanadium pentoxide, 6% of barium oxide, 6% of boron oxide, 38% of zinc oxide, 1% of aluminum oxide and 7% of bismuth oxide, pouring into a 5L turnover barrel, covering a barrel cover, putting the turnover barrel on an eight-roller ball mill, and mixing the raw materials until the raw materials are uniform and have no obvious chromatic aberration. Pouring the uniformly mixed raw materials into a 2L platinum crucible, smelting by using a silicon carbide rod resistance furnace, wherein the smelting temperature is 1150 ℃, and the heat preservation time is 30 minutes; turning on a double-roller machine, switching on circulating water, adjusting the distance between the two rollers to be 0.5mm, pouring completely molten glass liquid between the two rollers of the double-roller machine slowly and uniformly at the rotating speed of 25 r/min, after the glass liquid is completely poured, waiting for the quenched glass slag to return to room temperature, dry-grinding the glass slag by using a 5L corundum ball-milling tank, adding zirconia balls with the diameters of 5mm, 10mm and 15mm into the corundum ball-milling tank, and placing the glass slag on an eight-roller ball mill until the granularity D50 of the glass powder is less than 2 mu m, wherein the weight ratio of the zirconia balls to the corundum ball-milling tank is 5:3:2; and (3) after ball milling, performing ball material separation on powder in a corundum ball milling tank by using a 80-mesh stainless steel screen, soaking glass powder in the coating agent obtained in the step (1) for 20 hours at normal temperature, taking out, and drying by using an oven at 80 ℃ for 10 hours to obtain the treated glass powder.
The treated glass powder was sampled 6 parts after moisture was measured, 50g of each part was labeled as 1# to 6# glass powder, and the glass powder was placed between constant temperature and constant humidity at 25℃and 35% RH for 0 hour, 3 hours, 6 hours, 12 hours, 24 hours, and 48 hours, respectively, and then taken out, and the respective moisture was measured, and the measurement results were shown in Table 1.
TABLE 1
| Name of the name | No. 1 glass powder | No. 2 glass powder | 3# glass frit | No. 4 glass powder | 5# glass frit | No. 6 glass powder |
| Moisture (%) | 0.02 | 0.03 | 0.07 | 0.08 | 0.11 | 0.14 |
| Duration of placement (h) | 0 | 3 | 6 | 12 | 24 | 48 |
Comparative example 1
In example 1, the glass frit after the separation of the pellets was not subjected to the dipping and drying of the coating agent, and the other steps were the same as in example 1, and the obtained glass frits were labeled as # 7 to # 12 glass frits, and the moisture test results of the respective glass frits are shown in table 2.
TABLE 2
| Name of the name | No. 7 glass powder | 8# glass powder | No. 9 glass powder | 10# glass frit | 11# glass frit | 12# glass frit |
| Moisture (%) | 0.11 | 0.31 | 0.77 | 1.94 | 4.56 | 9.01 |
| Duration of placement (h) | 0 | 3 | 6 | 12 | 24 | 48 |
As can be seen from the data in tables 1 and 2, the V-Ba-B-Zn system glass powder treated by the coating agent has obviously improved moisture resistance.
Example 2
In the embodiment, the glass powder comprises the following components in percentage by weight: 12 kg of barium oxide, 40% of silicon dioxide, 7% of calcium oxide, 27% of phosphorus pentoxide, 13% of zinc oxide and 1% of zirconium oxide are mixed for 2kg, the smelting temperature is 1250 ℃, the heat preservation time is 30 minutes, other steps are the same as those of the embodiment 1, the treated glass powder is marked as 13# to 18# glass powder, and the moisture test results of the glass powder are shown in Table 3.
TABLE 3 Table 3
Comparative example 2
In example 2, the glass frit after the separation of the pellets was not subjected to the dipping and drying of the coating agent, and the other steps were the same as in example 2, and the obtained glass frits were labeled as # 19 to # 24 glass frits, and the moisture test results of the respective glass frits are shown in table 4.
TABLE 4 Table 4
| Name of the name | 19# glass frit | 20# glass frit | 21# glass frit | No. 22 glass powder | 23# glass frit | No. 24 glass powder |
| Moisture (%) | 0.12 | 0.26 | 0.51 | 1.92 | 4.50 | 8.92 |
| Duration of placement (h) | 0 | 3 | 6 | 12 | 24 | 48 |
As can be seen from the data in tables 3 and 4, the Ba-Si-Ca-p system glass powder treated by the coating agent has obviously improved moisture resistance.
Example 3
In the embodiment, the glass powder comprises the following components in percentage by weight: the materials including tin dioxide 35%, phosphorus pentoxide 55%, silicon dioxide 8%, aluminum oxide 0.5% and boron oxide 1.5% are mixed for 2kg, the smelting temperature is 900 ℃, the heat preservation time is 40 minutes, the other steps are the same as those of the embodiment 1, the treated glass powder is marked as 25# to 30# glass powder, and the water content testing results of the glass powder are shown in Table 5.
TABLE 5
| Name of the name | 25# glass powder | No. 26 glass powder | No. 27 glass powder | No. 28 glass powder | 29# glass powder | 30# glass frit |
| Moisture (%) | 0.02 | 0.05 | 0.06 | 0.10 | 0.14 | 0.21 |
| Duration of placement (h) | 0 | 3 | 6 | 12 | 24 | 48 |
Comparative example 3
In example 3, the glass frit after the separation of the pellets was not subjected to the dipping and drying of the coating agent, and the other steps were the same as in example 3, and the obtained glass frits were labeled as # 31 to # 36 glass frits, and the moisture test results of the respective glass frits are shown in table 6.
TABLE 6
| Name of the name | 31# glass powder | 32# glass powder | 33# glass frit | 34# glass powder | 35# glass powder | No. 36 glass powder |
| Moisture (%) | 0.21 | 0.46 | 1.14 | 3.65 | 8.43 | 11.2 |
| Duration of placement (h) | 0 | 3 | 6 | 12 | 24 | 48 |
As can be seen from the data in tables 5 and 6, the Sn-P-Si system glass powder treated with the coating agent has significantly improved moisture resistance.
Claims (7)
1. A method for reducing the hygroscopicity of glass frit, characterized in that it consists of the steps of:
(1) At normal temperature, adding excessive ethyl cellulose into tetraethoxysilane, continuously stirring until the solution is saturated, and then sieving the solution by using a stainless steel screen to obtain a coating agent;
(2) Mixing ingredients of glass powder which is easy to absorb moisture and hydrolyze according to the formula, smelting after the ingredients are uniformly mixed, quenching molten glass by using a pair of rollers, ball-milling and sieving cooled glass slag to obtain glass powder, finally soaking the glass powder in a coating agent, taking out and drying;
the glass powder which is easy to absorb moisture and hydrolyze is any one of V-Ba-B-Zn system glass powder, ba-Si-Ca-P system glass powder and Sn-P-Si system glass powder.
2. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: the glass powder is soaked in the coating agent for 20-24 hours.
3. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: the V-Ba-B-Zn glass powder comprises, by weight, 35% -50% of vanadium pentoxide, 5% -11% of barium oxide, 6% -10% of boron oxide, 25% -40% of zinc oxide, 1% -3% of aluminum oxide and 2% -7% of bismuth oxide.
4. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: the Ba-Si-Ca-P system glass powder comprises, by weight, 7% -15% of barium oxide, 20% -45% of silicon dioxide, 7% -15% of calcium oxide, 15% -30% of phosphorus pentoxide, 10% -18% of zinc oxide and 1% -3% of zirconium oxide.
5. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: the Sn-P-Si system glass powder comprises, by weight, 25% -40% of tin dioxide, 40% -60% of phosphorus pentoxide, 7% -13% of silicon dioxide, 0.5% -2.5% of aluminum oxide and 1% -5% of boron oxide.
6. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: the smelting temperature is 900-1250 ℃, and the heat preservation time is 20-60 minutes.
7. The method of reducing the hygroscopicity of glass frit according to claim 1, wherein: and (3) ball milling the cooled glass slag until the granularity D50 is smaller than 2 mu m, and sieving the cooled glass slag by using a stainless steel screen mesh with 80 meshes to separate the spherical materials.
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