CN108483900A - One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process - Google Patents

Abstract

The present invention relates to one kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, it is characterised in that is made of the raw material of following mass percent：56~61% SiO₂, 15~18.8% Al₂O₃, 0.5~2% GeO₂, 0.5~2% P₂O₅, 0.1~0.3% ZrO₂, 4 ~ 6% CaO, 6~7.5% B₂O₃, 2~3.8% MgO, 6~7% SrO, 0.1 ~ 0.2% SnO, 0.1 ~ 0.25% MoO₃, 0.1 ~ 0.25% WO₃；Wherein SiO₂+GeO₂+Al₂O₃+P₂O₅Value is 77%~79%, SiO₂+Al₂O₃+ZrO₂Value is 74~77%.Beneficial effects of the present invention：Glass high-temperature characteristic viscosity point reduces, and glass metal surface tension reduces, and both widens the float glass process forming operation range of glass, and had been also easy to the control of the float glass process moulding process of glass, glass product density uniformity greatly improves.

Description

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process

Technical field

The invention belongs to special glass production fields, are related to flexible glass production, and in particular to one kind being suitable for float glass process and is molded Low-phosphorous alkali-free glass batch.

Background technology

Flexible glass is a kind of novel special glass, and flexible glass is not only hard with glass relative to simple glass Degree, translucency, heat resistance, chemical stability also have the features such as the flexible, light of plastics, machinability.Flexible glass can For fields such as the touch panels such as mobile phone and tablet computer, the substrate of flexible display, organic thin film solar cell substrates.It is soft Property glass preparation method, mainly once forming process and secondary forming process, once-forming method include mainly overflow downdraw and Float glass process；Secondary forming process mainly pulls comprising chemical reduction method and again method.

Corning Incorporated monopolizes and controls overflow downdraw, and this method technical barrier is higher, and investment is huge, therefore How to be explored in China and a kind of is used in the molding glass formula of float glass process and technology is problem that industrial circle faces.Currently, electronics Presentation of information is mainly alkali-free alumina silicate glass, alkali-free alumina silicate glass with base plate glass such as glass such as TFT-LCD, OLED Due to containing more aluminium oxide and calcium oxide in formula, glass surface tension is big under same temperature condition（Than common sodium calcium Glass is big by 20% or so）, alkali-free alumina silicate glass is caused to embody the characteristic of large viscosity.Float glass process is will to melt glass using gravity Glass liquid shakeouts cooling in the horizontal plane, but alkali-free alumina silicate glass liquid viscosity is high, by effect of surface tension, lateral flow Difference, reaching horizontal plane using the gravitation of vertical direction, to pull up thin molding difficulty also big, so product density uniformity is bad, This aspect affects the performance of glass；On the other hand, due to Density inhomogeneity, Downstream processing factory glass when carrying out intensive treatment Glass is susceptible to warpage so that the processing yield of float glass is less than press over system glass.If being reduced simply by improving temperature Glass metal viscosity, this aspect can cause product cost to increase, while the also higher of the requirement to equipment, therefore simple warm by improving It spends to solve the problems, such as that viscosity is inadequate, also to consider material side.

Invention content

It is an object of the invention to solve large viscosity in float process alkali-free alumina silicate glass, product water plane pulls up The difficult problem of thin molding provides a kind of suitable for the molding low-phosphorous alkali-free glass batch of float glass process.

In order to complete above-mentioned purpose, the technical solution adopted by the present invention is as follows：

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, it is characterised in that by the raw material system of following mass percent At：56~61% SiO₂, 15~18.8% Al₂O₃, 0.5~2% GeO₂, 0.5~2% P₂O₅, 0.1~0.3% ZrO₂、4 ~ 6% CaO, 6~7.5% B₂O₃, 2~3.8% MgO, 6~7% SrO, 0.1 ~ 0.2% SnO, 0.1 ~ 0.25% MoO₃、 0.1 ~ 0.25% WO₃；Wherein SiO₂+GeO₂+Al₂O₃+P₂O₅Value is 77%~79%, SiO₂+Al₂O₃+ZrO₂Value is 74~77%.

Introduce GeO₂、P₂O₅To reduce the glass melting temperature of glass, P₂O₅The viscid activation energy of melt is small, it and B₂O₃It is viscid Activation energy is close, while P₂O₅[PO is formed into glass structure₄], wherein there are one the oxygen with double bond, the phosphorus oxygen four sides with double bond Body is asymmetric center, it can cause the viscosity of glass to become smaller, so that glass high-temperature characteristic viscosity point reduces, favorably In the control of float glass process moulding process；GeO₂Fusing point ratio SiO₂Much smaller, GeO₂The viscid activation energy of melt also compares SiO₂It is small, So that glass high-temperature characteristic viscosity point reduces, be also conducive to the control of float glass process moulding process；

In addition, present invention introduces micro MoO₃With WO₃, it is therefore an objective to reduce the surface tension of glass metal so that the float glass process of glass Forming operation range is widened, and the molding control of glass is also easy to.

Beneficial effects of the present invention：Glass high-temperature characteristic viscosity point reduces, and glass metal surface tension reduces, and both makes glass Float glass process forming operation range is widened, and the control of the float glass process moulding process of glass is also easy to, and glass product density uniformity carries significantly It is high.

Specific implementation mode

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, by obtain the final product full after glass preparation technique melt molding The alkali-free glass that sufficient electronic information is shown.Specific implementation step is as follows：

Embodiment 1

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, includes the SiO of mass percent 61%₂, 15% Al₂O₃、 0.3% ZrO₂, 0.5% GeO₂, 0.5% P₂O₅, 6% CaO, 6% B₂O₃, 3.8% MgO, 6% SrO, 0.2% SnO, 0.1% MoO₃, 0.1% WO₃；Carry out the dispensing of frit side according to this each component, subsequent dispensing input melting furnaces are melted, Homogenizing, clarification, the glass metal after clarification enter the molding of molten tin bath float glass process, and glassware after molding enters annealing kiln annealing.Float glass process Feature viscosity point is respectively in technique：Fusing clarification（When glass metal viscosity is 10Pa.s）Temperature is 1665 DEG C, and molding starts（Glass When glass liquid viscosity is 100Pa.s）Temperature is 1429 DEG C, operation（Glass metal by flowed out in melting furnaces tin liquor surface carry out float glass process at Type and the process of annealing）Temperature is 1261 DEG C.

Embodiment 2

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, includes the SiO of mass percent 59%₂, 16.5% Al₂O₃, 0.2% ZrO₂, 1.3% P₂O₅, 1% GeO₂, 5% CaO, 7% B₂O₃, 3% MgO, 6.55% SrO, 0.15% SnO, 0.15% MoO₃, 0.15% WO₃；The dispensing of frit side is carried out according to this each component, subsequent dispensing input melting furnaces carry out It is melted, homogenizing, clarifies, the glass metal after clarification enters the molding of molten tin bath float glass process, and glassware after molding enters annealing kiln annealing. Feature viscosity point is respectively in floating process：Fusing clarification（When glass metal viscosity is 10Pa.s）Temperature is 1645 DEG C, and molding is opened Begin（When glass metal viscosity is 100Pa.s）Temperature is 1410 DEG C, operation（Glass metal is floated by flowing out to tin liquor surface in melting furnaces The process that method is molded and anneals）Temperature is 1243 DEG C.

Embodiment 3

One kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, includes the SiO of mass percent 56%₂, 18.8% Al₂O₃, 0.1% ZrO₂, 2% P₂O₅, 2% GeO₂, 4% CaO, 7.5% B₂O₃, 2% MgO, 7% SrO, with 0.1% SnO, 0.25% MoO₃, 0.25% WO₃；The dispensing of frit side is carried out according to this each component, subsequent dispensing input melting furnaces carry out It is melted, homogenizing, clarifies, the glass metal after clarification enters the molding of molten tin bath float glass process, and glassware after molding enters annealing kiln annealing. Feature viscosity point is respectively in floating process：Fusing clarification（When glass metal viscosity is 10Pa.s）Temperature is 1638 DEG C, and molding is opened Begin（When glass metal viscosity is 100Pa.s）Temperature is 1390 DEG C, operation（Glass metal is floated by flowing out to tin liquor surface in melting furnaces The process that method is molded and anneals）Temperature is 1230 DEG C.

The float glass process characteristic point comparison of glass made from embodiment 1 ~ 3 and the AN100 glass of Japan ACG is as shown in table 1.

The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form；It is any ripe Know those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the method for the disclosure above and Technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalence enforcement of equivalent variations Example.Therefore, every content without departing from technical solution of the present invention, it is made to the above embodiment according to the technical essence of the invention Any simple modification, equivalent replacement, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.

Claims (1)

1. one kind being suitable for the molding low-phosphorous alkali-free glass batch of float glass process, it is characterised in that by the raw material of following mass percent It is made：56~61% SiO₂, 15~18.8% Al₂O₃, 0.5~2% GeO₂, 0.5~2% P₂O₅, 0.1~0.3% ZrO₂, 4 ~ 6% CaO, 6~7.5% B₂O₃, 2~3.8% MgO, 6~7% SrO, 0.1 ~ 0.2% SnO, 0.1 ~ 0.25% MoO₃, 0.1 ~ 0.25% WO₃；Wherein SiO₂+GeO₂+Al₂O₃+P₂O₅Value is 77%~79%, SiO₂+Al₂O₃+ZrO₂Value for 74~ 77%。