CN115784621A - Glass product for connecting mobile phone rear cover and lens part and using method - Google Patents
Glass product for connecting mobile phone rear cover and lens part and using method Download PDFInfo
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- CN115784621A CN115784621A CN202310069762.6A CN202310069762A CN115784621A CN 115784621 A CN115784621 A CN 115784621A CN 202310069762 A CN202310069762 A CN 202310069762A CN 115784621 A CN115784621 A CN 115784621A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention relates to the technical field of mobile terminal products, and provides a glass product for connecting a rear cover and a lens part of a mobile phone and a using method thereof, wherein the glass product is a glass sheet or glass powder or a glass ring, and the glass product comprises the following chemical components in percentage by weight: 14-21% of SiO 2 、34‑46%PbO、30‑42%Bi 2 O 3 、2‑5%B 2 O 3 、1‑3%Al 2 O 3 、1‑3%Li 2 O、0.5‑2%ZrO 2 、1‑3%P 2 O 5 、0.5‑2%Na 2 O、0.5‑2%Y 2 O 3 When in use, the glass product is placed between the rear cover glass of the mobile phone and the glass sheet for installing the lens and then is sealed by fusing. Through the technical scheme, the problems of high cost and complex process in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of mobile terminal products, in particular to a glass product for connecting a rear cover and a lens part of a mobile phone and a using method.
Background
At present, the rear cover materials of the mobile terminal equipment are mainly divided into four types: metal, ceramic, plastic, glass. The metal material is a common material of the back cover and the frame, and the fatal defect of the product is the interference to 5G signals, and the product is gradually replaced by the non-metal material; the plastic material has low hardness, easy scratch and low strength, and is gradually eliminated; ceramic materials such as zirconia have the disadvantages of being difficult to process, high cost, difficult to mass produce, and unable to be chemically strengthened; the glass capable of being chemically strengthened in multiple steps greatly improves the mechanical property through ion exchange, is strongly concerned as a protective material, can be prepared to be transparent or opaque or semitransparent, has strong color designability, and is widely used as a rear cover protective material of a mobile terminal.
With the continuous iteration updating of mobile terminal products, the design of the product appearance tends to be perfect, especially the design of the back cover and the camera lens in an integrated manner, at present, the products of high-end mobile phones such as apple series, hua-Shi flagship and the like adopt the produced thick glass sheets to integrate the back cover glass and the protruding glass of the camera lens through precision engraving, but the integrated back cover protection glass obtained by the method needs to pass through the procedures of thinning and precision engraving of the original glass material, and the raw material waste and the cost increase are caused.
Disclosure of Invention
The invention provides a glass product for connecting a rear cover and a lens part of a mobile phone and a using method thereof, which solve the problems of high cost and complex process in the prior art.
The technical scheme of the invention is as follows:
a glass product used for connecting a mobile phone rear cover and a lens part is a glass sheet or glass powder or a glass ring, and comprises the following chemical components in percentage by weight: 14-21% of SiO 2 、34-46%PbO、30-42%Bi 2 O 3 、2-5%B 2 O 3 、1-3%Al 2 O 3 、1-3%Li 2 O、0.5-2%ZrO 2 、1-3%P 2 O 5 、0.5-2%Na 2 O、0.5-2%Y 2 O 3 。
As a further technical scheme, the content of each component meets the following requirements: (Li) 2 O+Na 2 O）/（SiO 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ) Is 1/15-1/3, (SiO) 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ）/（PbO+Bi 2 O 3 ) Is 1/5-1/2.
As a further technical solution, the glass product has an expansion coefficient of 75-90 x 10 -7 /K。
As a further technical scheme, the expansion coefficient of the glass product is within 5% of that of the mobile phone rear cover glass.
Preferably, the expansion coefficient of the glass product is within 3% of that of the mobile phone back cover glass, more preferably within 1%, and most preferably consistent.
As a further technical scheme, the refractive index of the glass sheet is less than or equal to 1.8, and the transmittance is greater than or equal to 88%.
Preferably, the refractive index of the glass sheet is less than or equal to 1.75, more preferably less than or equal to 1.7.
Preferably, the glass sheet has a transmittance of 90% or more, more preferably 92% or more.
As a further technical scheme, the thicknesses of the glass ring and the glass sheet are both less than or equal to 0.15mm, and the mesh number of the glass powder is less than or equal to 300 meshes.
Preferably, the thickness of the glass ring and the thickness of the glass sheet are both less than or equal to 0.12mm, and more preferably less than or equal to 0.1mm.
As a further technical scheme, the glass sheet can be prepared by casting into a block and then performing multi-line cutting, grinding and polishing processing, or by a melting down-draw method, or by a drawing forming method after pressing, or by a cutting forming method after blowing.
As a further technical scheme, the glass ring is prepared by silk-screen printing of glass powder into a ring by a silk-screen printing method.
The invention also provides a using method of the glass product for connecting the rear cover and the lens part of the mobile phone, when the glass product is a glass sheet: sealing the rear cover glass of the mobile phone and the glass sheet for installing the lens by fusing through the glass sheet;
when the glass article is a glass ring: fixing a glass ring between the rear cover glass of the mobile phone and the glass sheet for installing the lens, and performing fusion sealing;
when the glass product is glass powder: and (3) preparing glass powder into slurry, printing the slurry on the rear cover glass of the mobile phone, and sealing the slurry with a glass sheet for mounting the lens in a melting way.
As a further technical scheme, the sealing temperature is 500-650 ℃, and the sealing time is 0.5-6h.
Preferably, the sealing temperature is 550-600 ℃.
As a further technical scheme, the softening point temperature-sealing temperature of the rear cover glass of the mobile phone is more than or equal to 20 ℃.
Preferably, the softening point temperature-sealing temperature of the glass of the rear cover of the mobile phone is more than or equal to 40 ℃, more preferably more than or equal to 60 DEG C
As a further technical scheme, the sealing temperature-the chemical strengthening temperature of the glass of the rear cover of the mobile phone is more than or equal to 30 ℃.
Preferably, the melt sealing temperature-the chemical strengthening temperature of the rear cover glass of the mobile phone is more than or equal to 40 ℃, and more preferably more than or equal to 60 ℃.
The beneficial effects of the invention are as follows:
the invention aims at the rear cover glass and the glass slide of the mobile phone, prepares a glass product which can tightly combine the rear cover glass and the glass slide into a whole through a low-temperature fusion sealing process, and achieves the same visual and use effects compared with the prior process of integrating the rear cover glass and the protruding glass of the camera lens. In addition, in the process, the protruding part is formed by removing the other part of the fine engraving on the basis of thick glass at present, but the unnecessary fine engraving is avoided, the processing procedures and difficulty are reduced, the yield is improved, the production capacity and efficiency are improved, and the cost is greatly saved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a plot of the coefficient of expansion of the glass article of example 5;
FIG. 2 is a plot of the coefficient of expansion of the glass article of example 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive step, are intended to be within the scope of the present invention.
The expansion coefficient of the low-temperature glass material can be obtained by testing through a thermal expansion instrument, and the glass composition and the fusion sealing technology which finally meet the requirements are obtained through continuous tests and researches.
SiO 2 Is an essential component of the glass of the present invention, and plays a role in stabilizing the glass structure and reducing the expansion coefficient if SiO 2 When the content of (B) is 14% or less, glass forming performance of the glass is deteriorated and chemical stability is deteriorated. Thus, siO 2 The lower limit of the content is preferably 15%, preferably 16%. If SiO 2 The content is more than 21 percent, the glass liquid phase temperature is high, the sintering temperature is high, and the mobile phone rear cover deforms in the high-temperature sintering process.
Al 2 O 3 Is an oxide which can improve the chemical stability and the thermal stability in the glass composition, and is very beneficial to improving the glass structure, but if the content of the oxide is less than 1 percent, the chemical stability of the glass is not ideal in the low-temperature glass composition, so Al 2 O 3 The lower limit of the content is 1%, preferably 1.2% or more, and more preferably 1.5% or more. On the other hand, if Al 2 O 3 If the content of (b) exceeds 3%, the liquidus temperature of the glass becomes high, causing a high sintering temperature and deformation of the mobile phone rear cover during high temperature sintering. Thus, al 2 O 3 The upper limit of the content is 3%, preferably 2.6%. In some embodiments, about 1%, 1.5%, 2%, 2.5%, 2.6%, 3% Al may be included 2 O 3 。
Li 2 O is an oxide for adjusting the expansion coefficient of the glass and can lower the viscosity and the sealing temperature of the glass, but if the content is less than 1%, the sealing temperature of the glass is higher, and if the content is overMostly contain Li 2 O, the glass is poor in chemical stability, and the expansion coefficient is large, so that the phase separation of the glass is easy. Thus, li 2 The upper limit of the O content is 3% and the lower limit is 1%. In some embodiments, about 1%, 1.5%, 2%, 2.5%, 3% Li may be included 2 O。
Na 2 O is used as the external body of the glass network in the invention, mainly plays a role of breaking the network to provide free oxygen, plays a role of adjusting the expansion coefficient of low-temperature glass and reducing the sealing temperature, and if Na is used, the O serves as the external body of the glass network 2 When the O content is low, the expansion coefficient is low and the sealing temperature is high, so Na 2 The lower limit of the O content is 0.5%, and the preferable lower limit is 1%. Excessive content of Na in glass 2 O, na because of its high coefficient of expansion, poor thermal stability, difficulty in annealing and susceptibility to cracking 2 The upper limit of the O content is 2%. In some embodiments, about 0.5%, 1%, 1.5%, 2% may be included.
A great deal of experimental research of the invention discovers that (Na) is controlled 2 O+Li 2 O）/（SiO 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ) Introduced in a proportion that affects the coefficient of expansion and sealing temperature of the low temperature glass, and in some embodiments (Na) is preferred 2 O+Li 2 O）/（SiO 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ) 1/15-1/3, when the proportion is higher than 1/3, the chemical stability of the glass is not ideal, and the expansion coefficient is higher; when the temperature is lower than 1/15, the sealing temperature of the glass is higher, so that the rear cover glass of the mobile phone is deformed and cannot be used in the sealing process.
ZrO 2 And Y 2 O 3 The invention mainly improves the chemical stability, hardness and mechanical property of the low-temperature glass, has certain strength, and the experimental data shows that the effect of mixing the low-temperature glass and the glass is better than the chemical stability of single use.
P 2 O 5 Can effectively reduce the melting temperature and increase ZrO 2 And Y 2 O 3 Solubility, but if P is contained excessively 2 O 5 It is easy to phase separate the mother glass and even to phase separateCrystallization increases the sintering temperature of the glass, which is disadvantageous for sealing by fusion.
B 2 O 3 Can effectively lower the melting temperature and strengthen the network structure of the glass, has good effect on the chemical stability and the thermal stability of the glass, but if B is excessively contained 2 O 3 Since phase separation and even crystallization of the mother glass easily occur, the sintering temperature of the glass is increased, and sealing by fusion is not facilitated, B 2 O 3 The upper limit of (2) is 5% and the lower limit is 2%. In some embodiments, about 2%, 2.5%, 3%, 4%, 5% may be included.
PbO is a necessary component of glass, can effectively reduce melting temperature and sealing temperature, but high-content PbO is easy to volatilize and erode a melting container, so that the PbO is properly controlled below 46%, more than 46% of the PbO is seriously eroded on refractory materials, and the PbO has adverse defects on glass, the stability of glass components cannot be ensured, but too low content of PbO is easy to cause higher sealing temperature and is not beneficial to sealing, and therefore the lower limit is controlled to be above 34%.
Bi 2 O 3 Can effectively reduce the high-temperature viscosity of the glass, improve the material property, can replace some characteristics of lead, but has higher price, can completely replace PbO to protect the environment, but has higher cost and is difficult to accept in the market, and Bi takes the comprehensive performance and cost into consideration 2 O 3 The dosage of the composition is controlled to be 30-42%. In addition to cost control, the present inventors have discovered that PbO and Bi 2 O 3 The use together has better sealing effect, bi 2 O 3 Not only can play a role in adjusting the expansion coefficient, but also can adjust the surface tension of the glass in a melt-sealing state, so that the combination firmness is tighter.
Y 2 O 3 Can improve the mechanical property of the glass, and can improve the hardness, the strength and the chemical stability of the glass by introducing a small amount of Y in the low-temperature glass 2 O 3 The glass network structure can be effectively improved, and the structure is more compact.
Experiments show that in order to ensure that the melt seal meets the use requirements, the (SiO) is determined through repeated experiments 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ）/（PbO+Bi 2 O 3 ) The control is reasonable between 1/5 and 1/2, when the proportion is lower than 1/5, the chemical stability of the glass is not ideal, the expansion coefficient is higher, and the structural stress influences the sealing strength; if the proportion is higher than 1/2, the sealing temperature of the glass is higher, and the excessively high sealing temperature causes the rear cover glass of the mobile phone to deform and be unusable in the sealing process.
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and carrying out ball milling and screening on the base glass to obtain 300-mesh glass powder.
Preparing a glass ring: fully grinding and mixing the binder and the glass powder, printing the glass powder on a release film in a screen printing mode, repeatedly printing and drying for 8-10 times until a glass ring with the thickness of less than 0.15mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 6.5-8% of polyvinyl butyral, 80-90% of terpineol, 1.5-3% of triethyl phosphate, and dibutyl phthalate: 3% -4% of polyethylene glycol and 3% -5% of polyethylene glycol.
Preparing a glass sheet: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging and pouring the materials into blocks after 2 hours, and performing multi-line cutting, grinding and polishing to obtain glass sheets with the thickness of less than or equal to 0.15 mm. Or can be prepared by a melting down-draw method or a drawing forming method after pressing or a cutting forming method after blowing.
Example 1
Glass article oxide composition: siO 2 2 16%、Al 2 O 3 1%、Na 2 O 0.5%、Li 2 O 1.5%、ZrO 2 1%、Y 2 O 3 0.5%、B 2 O 3 2.5%、PbO 46%、P 2 O 5 1%、Bi 2 O 3 30%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 32:68 grinding and mixing, printing the glass powder on a release film by a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.14mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 6.8% of polyvinyl butyral, 84.3% of terpineol, 1.9% of triethyl phosphate, 3.2% of dibutyl phthalate and 3.8% of polyethylene glycol.
Example 2
Glass article oxide composition: siO 2 2 15%、Al 2 O 3 3%、Na 2 O 0.8%、Li 2 O 1.5%、ZrO 2 1.7%、Y 2 O 3 0.7%、B 2 O 3 2%、PbO 42%、P 2 O 5 1.3%、Bi 2 O 3 32%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 34:66 grinding and mixing, printing the glass powder on a release film by a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.135mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 7.2% of polyvinyl butyral, 83.1% of terpineol, 2.7% of triethyl phosphate, 3.2% of dibutyl phthalate and 3.8% of polyethylene glycol.
Example 3
Glass article oxide composition: siO 2 2 14%、Al 2 O 3 1.6%、Na 2 O 1%、Li 2 O 1%、ZrO 2 1.5%、Y 2 O 3 0.9%、B 2 O 3 2.5%、PbO 41%、P 2 O 5 2.5%、Bi 2 O 3 34%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 35:65 grinding and mixing, printing glass powder on a release film by a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.128mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 8% of polyvinyl butyral, 80.5% of terpineol, 2.5% of triethyl phosphate, 4% of dibutyl phthalate and 5% of polyethylene glycol.
Example 4
Glass article oxide composition: siO 2 2 21%、Al 2 O 3 1%、Na 2 O 1%、Li 2 O 1%、ZrO 2 1.2%、Y 2 O 3 1.6%、B 2 O 3 2%、PbO 39%、P 2 O 5 2.2%、Bi 2 O 3 30%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 30:70, fully grinding and mixing, printing glass powder on a release film in a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.132mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 6.5% of polyvinyl butyral, 84% of terpineol, 1.5% of triethyl phosphate, 3.2% of dibutyl phthalate and 4.8% of polyethylene glycol.
Example 5
Glass article oxide composition: siO 2 2 14%、Al 2 O 3 1.9%、Na 2 O 0.5%、Li 2 O 1%、ZrO 2 0.5%、Y 2 O 3 1.3%、B 2 O 3 4%、PbO 38%、P 2 O 5 2.8%、Bi 2 O 3 36%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and carrying out ball milling and screening on the base glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing the binder and the glass powder according to the mass ratio of 38:62, fully grinding and mixing, printing the glass powder on a release film in a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.135mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 7% of polyvinyl butyral, 83.5% of terpineol, 2% of triethyl phosphate, 3.5% of dibutyl phthalate and 4% of polyethylene glycol.
Example 6
Glass article oxide composition: siO 2 2 18%、Al 2 O 3 2.5%、Na 2 O 1.5%、Li 2 O 3%、ZrO 2 2%、Y 2 O 3 2%、B 2 O 3 5%、PbO 34%、P 2 O 5 2%、Bi 2 O 3 30%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and carrying out ball milling and screening on the base glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 35:65 grinding and mixing completely, printing glass powder on a release film by screen printing, repeatedly printing and drying until a glass ring with the thickness of 0.14mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 6.6% of polyvinyl butyral, 83% of terpineol, 2.4% of triethyl phosphate, 3.2% of dibutyl phthalate and 4.8% of polyethylene glycol.
Example 7
Glass article oxide composition: siO 2 2 14%、Al 2 O 3 1.2%、Na 2 O 1.5%、Li 2 O 2%、ZrO 2 0.5%、Y 2 O 3 0.5%、B 2 O 3 3%、PbO 36%、P 2 O 5 1.3%、Bi 2 O 3 40%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing a binder and glass powder according to the mass ratio of 34.5:63.5 fully grinding and mixing, printing the glass powder on a release film in a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.128mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 7.2% of polyvinyl butyral, 83.1% of terpineol, 1.8% of triethyl phosphate, 3.4% of dibutyl phthalate and 4.5% of polyethylene glycol.
Example 8
Glass article oxide composition: siO 2 2 14%、Al 2 O 3 1%、Na 2 O 2%、Li 2 O 1%、ZrO 2 0.5%、Y 2 O 3 0.5%、B 2 O 3 2%、PbO 34%、P 2 O 5 3%、Bi 2 O 3 42%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and carrying out ball milling and screening on the base glass to obtain 300-mesh glass powder.
Preparing a glass ring: mixing the binder and the glass powder according to the mass ratio of 37:63 and fully grinding and mixing, printing the glass powder on a release film in a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.136mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 7.5% of polyvinyl butyral, 81.4% of terpineol, 2.6% of triethyl phosphate, 3.8% of dibutyl phthalate and 4.7% of polyethylene glycol.
Comparative example 1
Glass article oxide composition: siO 2 2 14%、Al 2 O 3 1.2%、Na 2 O 3%、Li 2 O 4%、ZrO 2 0.5%、Y 2 O 3 0.5%、B 2 O 3 3%、PbO 36%、P 2 O 5 1.3%、Bi 2 O 3 36.5%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and carrying out ball milling and screening on the base glass to obtain 300-mesh glass powder.
Preparing a glass ring: fully grinding and mixing the binder and the glass powder according to the mass ratio of 35.5 to 64.5, printing the glass powder on a release film in a screen printing mode, repeatedly printing and drying until a glass ring with the thickness of 0.135mm is obtained, and removing the glass ring for later use. The formula of the binder is as follows: 7.2% of polyvinyl butyral, 83.2% of terpineol, 2.8% of triethyl phosphate, 4.3% of dibutyl phthalate and 4.5% of polyethylene glycol.
Comparative example 2
Glass article oxide composition: siO 2 2 30%、Al 2 O 3 1%、Na 2 O 2%、Li 2 O 1%、ZrO 2 0.5%、Y 2 O 3 0.5%、B 2 O 3 2%、PbO 30%、P 2 O 5 3%、Bi 2 O 3 30%。
Preparing base glass: melting the raw materials at 1400-1500 ℃ according to the composition of oxides, discharging after 2 hours, and quenching with water to obtain the base glass.
Preparing glass powder: and performing ball milling and screening on the basic glass to obtain 300-mesh glass powder.
Preparing a glass ring: fully grinding and mixing the binder and the glass powder according to the mass ratio of 31. The formula of the binder is as follows: 6.7% of polyvinyl butyral, 84.1% of terpineol, 1.7% of triethyl phosphate, 3.6% of dibutyl phthalate and 3.9% of polyethylene glycol.
The base glasses of examples 1 to 8 and comparative examples 1 to 2 were subjected to the coefficient of expansion test: measurements were performed using a DIL2012STD dilatometer. Preparing a sample: strips of 4mm, 25.4mm and a heating rate of 5 ℃/min.
The use experiment: preparing 80mm 250mm 5mm strip-shaped samples from the mobile phone rear cover glass, then placing the prepared glass ring between the two strip-shaped samples, and carrying out sealing by melting in a sintering furnace.
Examples 1-5 the corresponding compositions of oxides in the mobile phone back cover glass were: 55.2% SiO 2 、22% Al 2 O 3 、8% Na 2 O、3.5% Li 2 O、6% MgO、3% B 2 O 3 、2% ZrO 2 、0.3% Sb 2 O 3 For example, the coefficient of expansion is about 78 x 10 -7 /K。
The oxide compositions of the mobile phone rear cover glass corresponding to the experiments of the examples 6-8 and the comparative examples 1-2 are as follows: 54% SiO 2 、20% Al 2 O 3 、9% Na 2 O、4% Li 2 O、7.7% MgO、1.5% B 2 O 3 、3.5% ZrO 2 、0.3% Sb 2 O 3 Having an expansion coefficient of about 85 x 10 -7 /K。
Test of tensile strength after melt sealing:
the tensile strength of the interface was tested according to GB/T31541-2015 Cross method. Cross sample requirement: two rectangular or square section strips with the same size and shape are bonded together in a crisscross mode, the maximum load corresponding to the interface crack applied to the crisscross test sample in the tensile bonding strength test is obtained, and the tensile bonding strength is calculated through the tensile breaking load and the bonding area.
Table 1 examples 1-5 oxide compositions and properties of glass articles
TABLE 2 oxide compositions and Properties of glass articles of examples 6-8 and comparative examples 1-2
Compared with example 7, the base glass in comparative example 1 has a higher expansion coefficient, and the glass can not meet the use requirement after selecting proper sealing temperature and sealing time, so that the glass can fall off in the tensile experiment. Comparative example 2 to example 8, siO 2 The higher content leads to the increase of sintering temperature and the deformation of the glass after sealing.
In addition, in examples 1 to 8, the sealing by the glass ring is described, and similarly, the sealing by the printing of the paste prepared from the glass frit between two strip-shaped samples may be performed, and the effect of the use is the same as that of the sealing by the glass ring, and the description thereof is not repeated.
Glasses having the same oxide composition as in examples 1 to 8 and comparative examples 1 to 2 were prepared as glass sheets, examples 9 to 16 and comparative examples 3 to 4, respectively. The preparation method comprises the following steps:
the glass is prepared according to the oxide composition of the glass product, melted and cast into blocks, and then the blocks are processed to be 0.1mm in thickness by multi-line cutting, grinding and polishing.
Examples 9-13 the same bar-shaped samples of mobile phone back cover glass as in examples 1-5 were used for the use experiments, and examples 14-16 and comparative examples 3-4 the same bar-shaped samples of mobile phone back cover glass as in examples 6-9 were used for the use experiments. The specific using method comprises the following steps: and placing the glass sheet between the two strip-shaped samples, and carrying out melt sealing in a sintering furnace.
The glass sheets were tested as follows:
refractive index:
the refractive index (nd) was measured by Abbe refractometer WAY-2S according to the method prescribed in GB/T7962.1-2010.
Visible light transmittance:
the sample is processed into a thickness of 0.1mm, the opposite surfaces of the sample are polished in parallel, the test wavelength is 200-2500nm by using a Lambda 950 type test, and the value at 550nm is taken in the test.
Table 3 performance testing of glass sheets in examples 9-13
TABLE 4 Performance testing of glass sheets of examples 14-16 and comparative examples 3-4
The expansion coefficients are the same for the oxide compositions of the glass flakes of examples 9-13 and the glass rings of examples 1-5. And the glass of the back cover of the mobile phone, the sealing temperature and the sealing time are the same when the mobile phone is used, so that the tensile strength after sealing is the same. Similarly, the same applies to examples 14 to 16 and examples 6 to 8, and comparative examples 1 to 2 and comparative examples 3 to 4, and the data of the sealing performance of examples 9 to 16 and comparative examples 3 to 4 are omitted.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A glass product for connecting a mobile phone rear cover and a lens part is characterized in that the glass product is a glass sheet or glass powder or a glass ring, and the glass product comprises the following chemical components in percentage by weight: 14-21% of SiO 2 、34-46%PbO、30-42%Bi 2 O 3 、2-5%B 2 O 3 、1-3%Al 2 O 3 、1-3%Li 2 O、0.5-2%ZrO 2 、1-3%P 2 O 5 、0.5-2%Na 2 O、0.5-2%Y 2 O 3 。
2. The glass product for connecting a mobile phone back cover and a lens part according to claim 1, wherein the content of each component satisfies: (Li) 2 O+Na 2 O）/（SiO 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ) Is 1/15-1/3, (SiO) 2 +Al 2 O 3 +ZrO 2 +Y 2 O 3 ）/（PbO+Bi 2 O 3 ) Is 1/5-1/2.
3. The glass article for connecting a back cover and a lens portion of a mobile phone according to claim 1, wherein the glass article has an expansion coefficient of 75-90 x 10 -7 /K。
4. The glass article for connecting a back cover of a mobile phone and a lens part as claimed in claim 1, wherein the coefficient of expansion of the glass article is within 5% of the coefficient of expansion of the back cover glass of the mobile phone.
5. The glass product for connecting a mobile phone back cover and a lens part as claimed in claim 1, wherein the refractive index of the glass sheet is not more than 1.8, and the transmittance is not less than 88%.
6. The glass product for connecting a rear cover and a lens part of a mobile phone as claimed in claim 1, wherein the thicknesses of the glass ring and the glass sheet are both less than or equal to 0.15mm, and the mesh number of the glass powder is less than or equal to 300 meshes.
7. A method of using the glass product for connecting a back cover and a lens portion of a mobile phone according to claim 1,
when the glass article is a glass sheet: sealing the rear cover glass of the mobile phone and the glass sheet for installing the lens by fusing the glass sheets;
when the glass article is a glass ring: fixing a glass ring between the rear cover glass of the mobile phone and the glass sheet for installing the lens, and performing fusion sealing;
when the glass product is glass powder: and preparing glass powder into slurry, printing the slurry on the rear cover glass of the mobile phone, and sealing the slurry with a glass sheet for mounting a lens in a fusing manner.
8. The use method of the glass product for connecting the back cover and the lens part of the mobile phone as claimed in claim 7, wherein the sealing temperature is 500-650 ℃ and the sealing time is 0.5-6h.
9. The use method of the glass product for connecting the rear cover and the lens part of the mobile phone as claimed in claim 7, wherein the softening point temperature-sealing temperature of the rear cover glass of the mobile phone is not less than 20 ℃.
10. The use method of the glass product for connecting the back cover and the lens part of the mobile phone as claimed in claim 7, wherein the sealing temperature-the chemical strengthening temperature of the back cover glass of the mobile phone is greater than or equal to 30 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310069762.6A CN115784621B (en) | 2023-02-07 | 2023-02-07 | Glass product for connecting mobile phone rear cover and lens part and use method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310069762.6A CN115784621B (en) | 2023-02-07 | 2023-02-07 | Glass product for connecting mobile phone rear cover and lens part and use method |
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| CN115784621A true CN115784621A (en) | 2023-03-14 |
| CN115784621B CN115784621B (en) | 2023-05-23 |
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| CN115784621B (en) | 2023-05-23 |
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