200304431 玖、發明說明 . (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明） 本發明涉及一種浮法玻蠣製程中經由溢流唇供應玻璃熔 液所用之裝置，玻璃熔液由玻璃熔液盆一可調整之供應通 道而輸送至溢流唇且經由溘流唇之以金屬層覆蓋之表面而 以滑動方式到達一種浮動池之錫表面。 在以此種浮法玻璃製程製造浮法玻璃時，通常是使玻璃 在玻璃熔液盆中冶煉，且在一精煉組件中以無水泡之方式 "精煉π，在一供應通道中在玻璃熔液盆及浮動池之間使玻 φ 璃熔液均句化且受到空調（調整該造形所需之黏度）。空調 後之玻璃熔液在供應通道之末端上經由溢流唇而流至浮動 池中之流體錫上。在浮動池中使玻璃熔液之造形成爲一種 玻璃帶。 溢流唇之下邊緣至錫表面之距離以及溢流唇之表面特性 對浮動池中所進行之造形過程及浮法玻璃之品質是具有決 定性。 若溢流唇之與玻璃熔液相接觸之表面具有裂痕，孔洞或 ® 腐蝕輪廓，則這會在浮法玻璃中造成表面缺陷（Cross Distorsion) 〇 若浮動池中溢流唇之下邊緣至錫表面之距離由於溢流唇 逐漸增加之腐蝕而變成太大，則浮動池中玻璃熔液之供應 條件（例如，B a c k F 1 〇 w : F r ο n t F 1 〇 w之比値）會改變。於是 形成一種濕背式（Wet Back)氣泡。 在習知之裝置中，溢流唇由防火之陶瓷材料所構成。通 200304431 常使用淤泥繞注之已燒結之矽酸玻璃陶瓷（Fused Silica) 或熔融澆注之AhO3作爲溢流唇用之材料。此種材料在製 造石灰-碳酸氫鈉-玻璃時已完全足夠且可使溢流唇之壽命 達2至3年。 但在製造高熔融之腐蝕性玻璃（例如，硼矽酸鹽玻璃（稀 鹼性且稀酸性）及鋁-矽酸鹽玻璃）時，由上述之材料只能使 溢流唇之壽命最高達到6個月。因此試圖使用該溢流唇用 之其它材料以提高該溢流唇之壽命。於是建議：使用一種 熔融澆注材料（其具有8 5至9 7 w t · %之Z r 0 2)且在製造硼石夕 酸鹽玻璃（特別是非鹼性之硼矽酸鹽玻璃）時使用此種溢流 唇。溢流唇之壽命因此可提高至大約1年（JP 06-3 45467 A)。 溢流唇用之目前已知之材料之缺點是由於腐蝕而由玻璃 熔液所限制之壽命以及已爲人所知之對玻璃品質（失真等） 之影響。此外，陶瓷材料之每次腐蝕都與腐蝕產品之水泡 形成及去除有關’這同樣會使玻璃品質劣化。 jp 06-345467 A中所述之溢流唇用之材料具有較佳之抗 腐蝕性，但其對溫度變化較敏感。在溫度變化時會在表面 中輕易地造成剝落現象，在極端情況時甚至會造成裂痕而 具有習知之浮法玻璃之品質缺陷。又，這些材料很昂貴。 在溢流唇上形成金屬層時，特別是亦須注意金屬層之保 護以防止由浮動池而來之還原用之形成氣之侵蝕。又，在 選取該溢流唇用之材料時須確保：溢流唇之材料及金屬層 之材料之熱膨脹係數相近。 若使用溢流唇用之一般材料（例如，熔融之矽石，Al2〇 3 200304431 或锆），則溢流唇具有一種像金屬層一樣小很多之熱膨脹係 數。在製程溫度是1 2 0 0 °C至1 4 0 0 °C時會在金屬層中造成皺 紋及裂痕，在極端情況時會使溢流唇失效。 本發明之目的是提供上述形式之裝置，其中溢流唇具有 一種直至1 4 0 0 °C之耐溫性，對不同之玻璃熔液之高的抗腐 蝕性且不會不期望地與玻璃熔液互相作用，對溫度變化不 敏感以及不會在玻璃熔液中形成腐蝕性成品。 本發明之目的以下述方式達成：溢流唇之至少與玻璃熔 液相接觸之表面塗佈一種昂貴之防火金屬層。 由昂貴之防火金屬所構成之金屬層對溢流唇之與玻璃熔 液相接觸之表面而言可造成一足夠大之抗腐蝕性，因此可 使溢流唇之壽命提高。又，可防止各腐蝕性成品進入玻璃 熔液中且就選取該溢流唇用之材料而言可更有利地針對熱 膨脹係數來調整。就金屬層而言可選取鈾或鉑合金，溢流 唇之材料則可使用鎂鋁酸鹽-尖晶石，因此可達成一種相近 之熱膨脹特性。金屬層中皺紋及裂痕之形成可輕易地避免 。熱膨脹係數之範圍是在10〜中。 鈾及1 0 w t. %之铑所形成之合金或鉑及5 w t. °/。之金所形成 之合金適合用作金屬層。 爲了針對由浮動池而來之還原用之大氣來保護鉑，則溢 流唇下方經由噴嘴之氣體形式之氮須設定爲8 0 0至1 2 0 0 °C 之溫度。 本裝置特別適用於依據浮法過程來製成平板顯示器用之 基板玻璃時所用之浮法設備中。 200304431 純鉑及其合金相對於硼矽酸鹽-及鋁矽酸鹽玻璃而言具 有足夠之抗腐蝕性。 硼矽酸鹽玻璃之成份爲：200304431 发明. Description of the invention. (The description of the invention should state: the technical field, the prior art, the content, the embodiments, and the drawings of the invention.) The present invention relates to a method for supplying glass melt through an overflow lip in a float glass oyster process In the device used, the glass melt is conveyed to the overflow lip from an adjustable supply channel of the glass melt basin and reaches the tin surface of a floating pool in a sliding manner through the surface of the flow lip covered with a metal layer. In the manufacture of float glass by such a float glass process, the glass is usually smelted in a glass melt tank, and in a refining assembly in a waterless manner " refining π, the glass is melted in a supply channel Between the liquid basin and the floating pool, the glass φ glass melt is homogenized and subjected to air conditioning (adjust the viscosity required for the shaping). The glass melt after air-conditioning flows at the end of the supply channel through the overflow lip to the fluid tin in the floating pool. The glass melt is formed into a glass ribbon in a floating bath. The distance from the bottom edge of the overflow lip to the tin surface and the surface characteristics of the overflow lip are decisive for the forming process in the floating pool and the quality of the float glass. If the surface of the overflow lip in contact with the molten glass has cracks, holes or corrosion profiles, this will cause surface defects in the float glass (Cross Distorsion). 〇If the edge of the overflow lip in the floating pool reaches the tin surface The distance becomes too large due to the gradually increasing corrosion of the overflow lip, and the supply conditions of the glass melt in the floating bath (for example, the ratio of Back F 1 〇w: F r ο nt F 1 〇w) will change. A Wet Back bubble is formed. In conventional devices, the overflow lip is made of a fire-resistant ceramic material. General 200304431 Fused Silica or AhO3 fused cast silt is often used as the material for overflow lip. This material is sufficient for the production of lime-sodium bicarbonate-glass and can extend the life of the overflow lip to 2 to 3 years. However, when manufacturing highly molten corrosive glass (for example, borosilicate glass (dilute alkaline and acidic) and aluminum-silicate glass), the above materials can only make the life of the overflow lip up to 6 Months. Attempts have therefore been made to use other materials for the overflow lip to increase the life of the overflow lip. Therefore, it is recommended to use a molten casting material (having a Zr 0 2 of 85 to 97 wt.%) And use it in the manufacture of borosilicate glass (especially non-alkaline borosilicate glass). Overflowing lip. The life of the overflow lip can therefore be increased to approximately 1 year (JP 06-3 45467 A). The disadvantages of the currently known materials for overflow lips are the limited life of the glass melt due to corrosion and the known effects on glass quality (distortion, etc.). In addition, every corrosion of the ceramic material is related to the formation and removal of blisters from the corroded product ', which also degrades the glass quality. The material for the overflow lip described in jp 06-345467 A has better corrosion resistance, but it is more sensitive to temperature changes. When the temperature changes, it will easily cause peeling in the surface, and in extreme cases, it may even cause cracks, which has the quality defects of conventional float glass. Also, these materials are expensive. When forming a metal layer on the overflow lip, it is particularly necessary to pay attention to the protection of the metal layer to prevent the erosion of the forming gas used for reduction from the floating pool. In addition, when selecting the material for the overflow lip, it must be ensured that the thermal expansion coefficients of the material of the overflow lip and the material of the metal layer are similar. If the general material used for the overflow lip (for example, fused silica, Al203 200304431 or zirconium) is used, the overflow lip has a coefficient of thermal expansion much smaller than a metal layer. Wrinkles and cracks can be caused in the metal layer at a process temperature of 12 0 ° C to 14 0 ° C, and in extreme cases, the overflow lip will fail. The object of the present invention is to provide a device of the above-mentioned form, in which the overflow lip has a temperature resistance up to 1 400 ° C, a high corrosion resistance to different glass melts and does not undesirably fuse with the glass Liquids interact with each other, are insensitive to temperature changes and do not form corrosive finished products in glass melts. The object of the invention is achieved by coating an expensive fire-resistant metal layer on at least the surface of the overflow lip which is in contact with the molten glass. The metal layer composed of expensive fire-resistant metal can cause a sufficiently large corrosion resistance to the surface of the overflow lip which is in contact with the molten glass liquid, so that the life of the overflow lip can be improved. In addition, each corrosive product can be prevented from entering the glass melt, and the material for the overflow lip can be selected more favorably to adjust the thermal expansion coefficient. As for the metal layer, uranium or platinum alloy can be selected, and the material of the overflow lip can be magnesium aluminate-spinel, so a similar thermal expansion characteristic can be achieved. The formation of wrinkles and cracks in the metal layer can be easily avoided. The coefficient of thermal expansion is in the range of 10 ~. Alloy or platinum formed from uranium and 10 w t.% Rhodium or 5 w t. ° /. An alloy of gold is suitable for use as a metal layer. In order to protect the platinum from the reducing atmosphere from the floating pond, the nitrogen in the form of a gas passing through the nozzle below the overflow lip must be set to a temperature of 800 to 120 ° C. This device is particularly suitable for use in float equipment used to make substrate glass for flat panel displays according to the float process. 200304431 Pure platinum and its alloys have sufficient corrosion resistance relative to borosilicate- and aluminosilicate glasses. The composition of borosilicate glass is:
5 5 〜6 5 w t. 0/〇 Si02 1 2 〜2 0 w t · % A120 ^ 5 w t. % B 2 〇 3 0 〜5 w t. 0/〇 B aO 3 〜9 w t · 0/〇 CaO 1 〜5 w t. % \ MgO 1 〜5 w t · % SrO 時特別適合且本發明之溢流唇在表面無皺紋及無裂痕時 具有高的壽命，其對以浮法製成之玻璃帶之表面品質之改 良而言具有決定性之意義。 本發明以下將依據圖式中之實施例來說明。 如第1圖之原理所示，玻璃在玻璃熔液盆1 0中冶煉且輸 送至一供應通道11，其中已精煉之玻璃熔液1 2之數量可 利用玻璃量-調整裝置14(Fr〇nt Tweel)(其配屬於供應通道 1 1之末端上之溢流唇2 0 )來調整。 一種阻塞裝置13(Back Tweel)配屬於該供應通道1 1，藉 此可使玻璃熔液1 2供應至溢流唇2 0被完全中斷。 如第2圖所示，經由溢流唇2 0之上側所輸送之玻璃熔液 12.1之數量藉由玻璃量-調整裝置14(Fr〇ntTweel)之設定 來進行分配。溢流唇2 0之上側以金屬層2 2來覆蓋。金屬 層目前由鉑或鉑合金所構成，其藉由鈾銷（pin)或鈾合金銷 200304431 而固定在側面上限制該溢流唇2 0所用之側面唇中。須設定 各固定位置，使其不會與已被覆之溢流唇2 0上所流過之玻 璃熔液1 2 · 1相接觸。此處須明確地說明：在本發明之範圍 中金屬層2 2可像目則一樣由各別之構件所構成或金屬層 只有單一部份以溢流唇20來形成。金屬層22亦可蒸鍍在 溢流唇2 0上或以其它方式塗佈而成。 玻璃熔液1 2 · 1到達浮動池中，浮動池以基準壁1 5及底 部元件1 7來表示且可容納流體錫1 8。流動之玻璃熔液1 2 . 1 在流體錫1 8上形成一種玻璃帶1 2 . 1，其經由拉引滾筒而 由浮動池中拉出。 溢流唇2 0之下邊緣至浮動池中該流體錫1 8之表面須具 有正確之距離。溢流唇2 〇可配置在浮動池之基準壁1 5上 。噴嘴2 1配置在溢流唇2 0下方，經由噴嘴使8 0 0 °C至1 2 0 0 °C 之氣體形式之氮供應至溢流唇2 0及浮動池之間之過渡區 。這樣可使鉑層之未由玻璃熔液所覆蓋之部份可針對還原 用之浮動池大氣而受到保護。 溢流唇2 0及浮動池之間之過渡區藉由前罩1 9朝向該供 應通道1 1而被覆蓋。流體錫1 8在浮動池中形成浮動式玻 璃帶1 2.2所需之流動式載體，玻璃帶1 2.2經由瓷磚1 6而 與浮動池之基準壁1 5相隔開。 溢流唇2 0由鎂鋁酸鹽尖晶石所構成’其就像金屬層一樣 由鉑及1 〇 w t. %之铑或由鉛及5 w t · %之金所構成且具有相近 之熱膨脹係數1 〇〜1 4 X 1 0·6 K/ 1。此種已調整之熱膨脹係數 可確保：在溫度1 2 0 0 °C至1 4 0 0 °C時金屬層不會形成皺紋或 200304431 裂痕且因此形成一種明顯之表面以便改良浮動中之玻璃帶 1 2.2之表面品質。在溢流唇2 0之下側上經由噴嘴2 1使氣 體形式之氮之溫度成爲8 0 0至1 2 0 0 °C，以便針對由浮動池 而來之還原用之大氣來保護該鉑。 金屬層之下側亦可承載一種氣密之擴散阻止層，以便針 對由浮動池出來之錫蒸氣及還原用之形成氣來保護該金屬 層。 本發明之裝置特別適合用來依據浮動過程製成平板顯示 器用之玻璃基板。所使用之硼矽酸鹽玻璃較佳是具有以下 之成份： 5 5 〜6 5 w t · % Si02 1 2 〜2 0 w t. % Al2〇 ^ 5wt.°/〇 B 2 0 3 0 〜5 w t · % BaO 3 〜9 w t. 〇/〇 CaO 1 〜5 w t · % MgO 1 〜5 w t · % SrO 式簡單說明： 第1圖在玻璃熔液盆至浮動池之過渡區（其具有一種溢 流唇）中製成浮法玻璃所用之浮法設備。 第2圖只具有一阻塞活門之浮法設備中該具有溢流唇 之過渡區。 主要部分之代表符號說明 10 玻璃熔液盆 -11- 200304431 1112,12.1 12.2 13 14 15 16 供應通道 玻璃熔液 玻璃帶 阻塞裝置 玻璃量-調整裝置 基準壁 瓷磚5 5 to 6 5 w t. 0 / 〇Si02 1 2 to 2 0 wt.% A120 ^ 5 w t.% B 2 〇3 0 to 5 w t. 0 / 〇B aO 3 to 9 wt. 0 / 〇 CaO 1 ～ 5 w t.% \ MgO 1 ～ 5 wt ·% SrO is particularly suitable and the overflow lip of the present invention has a long life without wrinkles and cracks on the surface. The improvement of surface quality is of decisive significance. The present invention will be described below based on the embodiments in the drawings. As shown in the principle of Fig. 1, the glass is smelted in a glass melt basin 10 and conveyed to a supply channel 11, wherein the quantity of the refined glass melt 12 can be used by the glass quantity-adjustment device 14 (Fr0nt Tweel) (which is assigned to the overflow lip 2 0 on the end of the supply channel 11). A blocking device 13 (Back Tweel) is assigned to the supply channel 11 so that the supply of the glass melt 12 to the overflow lip 20 can be completely interrupted. As shown in FIG. 2, the amount of glass melt 12.1 conveyed through the upper side of the overflow lip 20 is distributed by setting the glass amount-adjustment device 14 (FrontTweel). The upper side of the overflow lip 20 is covered with a metal layer 22. The metal layer is currently composed of platinum or a platinum alloy, which is fixed in a side lip on the side to limit the overflow lip 20 by a uranium pin (uranium pin) or a uranium alloy pin 200304431. Each fixed position must be set so that it will not contact the glass melt 1 2 · 1 flowing on the covered overflow lip 20. It must be clearly stated here that within the scope of the present invention, the metal layer 22 can be composed of individual components as intended or the metal layer has only a single portion formed by the overflow lip 20. The metal layer 22 may also be deposited on the overflow lip 20 or coated in another manner. The glass melt 1 2 · 1 reaches the floating pool, which is represented by the reference wall 15 and the bottom element 17 and can hold the fluid tin 18. The flowing glass melt 12. 1 forms a glass ribbon 12. 1 on the fluid tin 18, which is pulled out of the floating bath through a drawing roller. There must be a correct distance from the lower edge of the overflow lip 20 to the surface of the fluid tin 18 in the floating pool. The overflow lip 20 can be arranged on the reference wall 15 of the floating pool. The nozzle 21 is arranged below the overflow lip 20, and through the nozzle, nitrogen in a gas form of 80 ° C to 12 ° C is supplied to the transition area between the overflow lip 20 and the floating pool. This allows the portion of the platinum layer not covered by the molten glass to be protected from the atmosphere of the floating bath for reduction. The transition area between the overflow lip 20 and the floating pool is covered by the front cover 19 toward the supply channel 11. The fluid tin 18 forms a floating carrier for the floating glass ribbon 12 in the floating pool. The glass ribbon 12 is separated from the reference wall 15 of the floating pool by the ceramic tile 16. The overflow lip 20 is composed of magnesium aluminate spinel, which is like a metal layer composed of platinum and 10 watt t.% Rhodium or lead and 5 wt.% Gold with similar thermal expansion. Coefficient 1 〇 ~ 1 4 X 1 0 · 6 K / 1. This adjusted thermal expansion coefficient ensures that the metal layer does not form wrinkles or 200304431 cracks at temperatures of 12 0 ° C to 14 0 ° C and thus forms a distinct surface for improving glass ribbons in float 1 Surface quality of 2.2. On the underside of the overflow lip 20, the temperature of nitrogen in the form of gas was adjusted to 800 to 120 ° C via a nozzle 21 in order to protect the platinum from the reducing atmosphere from the floating pool. The underside of the metal layer may also carry an air-tight diffusion preventing layer, so as to protect the metal layer against the tin vapor from the floating pool and the forming gas for reduction. The device of the present invention is particularly suitable for making a glass substrate for a flat panel display according to a floating process. The borosilicate glass used preferably has the following components: 5 5 ~ 6 5 wt ·% Si02 1 2 ~ 2 0 w t.% Al2〇 ^ 5wt. ° / 〇B 2 0 3 0 ~ 5 wt % BaO 3 ～ 9 w t. 〇 / 〇CaO 1 ～ 5 wt. Lip) float equipment used to make float glass. Figure 2 shows the transition zone with overflow lip in a float plant with only a blocking valve. Description of the main parts of the symbol 10 Glass melt basin -11- 200304431 1112, 12.1 12.2 13 14 15 16 Supply channel Glass melt Glass ribbon Blocking device Glass volume-adjustment device Reference wall Tile
17 底部元件 1 8 流體錫 19 前罩 20 溢流唇 2 1 噴嘴 22 金屬層17 Bottom element 1 8 Fluid tin 19 Front cover 20 Overflow lip 2 1 Nozzle 22 Metal layer
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