201219607 六、 [0001] [0002] [0003] Ο [0004] ❹ [0005] [0006] [0007] [0008] 發明說明： 【發明所屬之技術領娀】 本發明涉及一種鋁製品及其製備方法。 【先前技術】 在呂及紹合金因其質輕以及優良的機械加工性能，使得在呂 及鋁合金被廣泛地應用於各種家用電器、汽車、電子產 品的外殼。 為了獲得較好的外觀效果，通常藉由陽極氧化、電泳塗 裝、噴漆等表面裝飾處理於銘或銀合金產品表面形成某 種顏色的裝飾層’然，經上述處理獲得的裝飾層的顏色 通常是固定不變的’缺乏變化和多樣，。隨著消費水準 的提高，這種外觀已經不能滿足消費者對這些產品的外 觀追求。 【發明内容】 有鑒於此，有必要提供一種顏色多變、具有較佳裝飾效 果的鋁製品〇 另外，有必要提供一種上述鋁製品的製備方法。 一種鋁製品，包括鋁基體及形成於該鋁基體表面的氧化 鋁膜，S亥氧化鋁膜的内部及表面分佈有複數奈米孔，所 述奈米孔的孔徑為20~200nm，該鋁製品還包括形成於該 氧化銘膜表面的#色透明真空鑛膜層，該冑空嫂膜層的 厚度為10〜15〇ϋπι。 -種銘製品的製備方法，包括如下步驟： 提供鋁基體； 099137895 表單編號Α0101 第3頁/共11頁 0992066045-0 201219607 [0009] 陽極氧化處理，以於該鋁基體表面形成氧化鋁膜，該氧 化鋁膜的内部及表面分佈有複數奈米孔，所述奈米孔的 孔徑為20〜200nm ; [0010] 真空鍍膜處理，以於該氧化鋁膜表面形成無色透明真空 鍍膜層，該真空鍍膜層的厚度為10〜150nm。 [0011] 相較於習知技術，上述鋁製品先藉由陽極氧化處理於鋁 基體表面形成奈米多孔氧化鋁膜，再藉由真空鍍膜方法 於該多孔氧化鋁膜表面形成真空鍍膜層。該真空鍍膜層 具有氧化鋁膜的表面仿形結構，使得真空鍍膜層上亦具 有奈米多孔結構。故，於光的照射下，真空鍍膜層對光 線具有反射和折射而顯示出干涉色彩，加上真空鍵膜層 的奈米多孔特徵，使得鋁製品隨著觀測角度的變化而呈 現不同的顏色，產生多種變色效果，具有較佳的裝飾效 果。 【實施方式】 [0012] 請參閱圖2，本發明較佳實施例的鋁製品100包括鋁基體 10、一層形成於鋁基體10表面的奈米多孔氧化鋁膜20及 形成於該氧化鋁膜20上的一層無色透明的真空鍍膜層30 [0013] 鋁基體1 0的材料為純鋁或鋁合金。 [0014] 請參閱圖1，氧化鋁膜20的内部及表面分佈有複數奈米孔 22，奈米孔22的孔徑範圍為20〜200nm，較佳為30〜60nm ，當孔徑小於20nm時，容易被真空鍍膜層30填充堵塞。 氧化鋁膜20的厚度為50〜500奈米。氧化鋁膜20藉由陽極 099137895 表單編號A0101 第4頁/共11頁 0992066045-0 201219607 氧化處理形成。 [0015] Ο ο [0016] [0017] [0018] 該真空鍍膜層30形成於氧化鋁膜20的頂表面24及所述奈 米孔22的側壁221和底壁223上，使得真空鍍膜層30具有 氧化膜20的表面仿形結構’其鍵覆於氧化銘膜2〇上後 基本不改變氧化鋁膜20的表面結構’所述奈米孔22未被 真空鍍膜層30堵塞。真空鍍膜層30可以由金屬、金屬氧 化物或非金屬氧化物形成，其中金屬可以為鈦、鉻、鋁 、鋅及鍅等，金屬氧化物可以為鉻、鋁、鋅及锆的氧化 物’非金屬氧化物可以為二氧佴矽。真空錄膜層3〇的厚 度於10〜150nm範圍内。且，位:於侧壁221上的真空鑛膜 層30的厚度小於位於頂表面24和底壁223上的真空鑛膜層 30的厚度。位於侧壁221上的真空鍍膜層30的厚度為 l〇~6〇nm ;位於頂表面24和底壁223上的真空鍍膜層3〇的 厚度為50~150nm，較佳為50〜90nm。厚度於1〇〜15〇11111範 圍内時，真空鍍膜層30接近無色透明，超過15〇11111時，真 空鍍膜層30自身的顏色於肉眼觀察下開始變得較為明顯 〇 上述鋁製品100的製備方法，包括如下步驟： 首先，提供該鋁基體10。 對鋁基體10進行預處理。預處理包括對鋁基體10除油及 化學拋光。其中，所述除油步驟可以用丙酮清洗大約5分 鐘後，於乙醇中超聲振動大約30mi η，然後用水清洗。所 述化學拋光所用拋光液可以用體積比為3 : 1 : 1的碟酸（ 品質濃度為85%)、硝酸和水的混合溶液，拋光時抛光液 099137895 表單編號Α0101 第5頁/共11頁 0992066045-0 201219607 [0019] [0020] [0021] 099137895 溫度於70〜80°C之間，拋光時間大約為5分鐘。 對經上述預處理的鋁基體1〇進行陽極氧化處理，以於表 面形成該多孔氣化娜2〇(見圖n。陽極氧化所用電解 液可以為硫酸溶液、草酸溶液或魏溶液。相硫酸溶 液時，硫酸濃度可以為〇. 2~〇. 5mol/L，電解液溫度為 8〜12°C，電壓為15〜50V，氧化時間為3〜1〇min;當用草 酸溶液時，草酸濃度可以為〇. 2~〇· 5m〇i/L，電解液溫度 為卜5°C，電壓為30~60V，氧化時間為3〜1〇min ;當用 磷酸溶液時’磷酸濃度可以為8，wt%，電解液溫度為 2〜7°C，電壓為10{H20脾，氧化時間為3〜i〇min。經上 述陽極氧化處理的銘基體1(ί:表面形成所述氧仙額， 該氧化铭膜2G内部及表面分財複數所述奈米孔^。 對形成有氧化_20的銘基體1Q進行真空鑛膜處理以 於氧她賴表面形成該透明的真空鑛膜層3()。該真空 鍵膜方法可採⑽鍍子錢。該㈣具體工藝 可採用相應方法的常規鑛•藝，鍍膜難中藉由控制 鍵膜時間來㈣真錢__雜於上述範圍内，以 保證該真空鍍膜層30為無色透明。 本發明的銘製品⑽先藉由陽極氧化處理於縣龍表面 形成奈米纽氧化賴20，再藉由鍍财法於該多 孔氧化賴20表面形成真空㈣層3()。該真空錢膜層別 具有氧化㈣20的表面仿料構，倾真讀膜層別上 亦具有奈米多孔結構。故，於光_射了，麟 30對光線具有反射和折射而顯示出干涉色彩加上真空 鑛膜層30的奈米多孔特徵’使得紹製品剛隨著觀測角工度 表單編號A0101 第6頁/共u頁 0992066045-0 201219607 [0022] 的變化而呈現不同的顏色，產生多種變色效果，具有較 佳的裝飾效果。 【圖式簡單說明】 圖1為本發明較佳實施例表面形成有奈米多孔氧化膜的鋁 基體的剖視示意圖。 [0023] 圖2為本發明較佳實施例的鋁製品的剖視示意圖。 [0024] 【主要元件符號說明】 鋁製品：100 ❹[0025] 鋁基體：10 [0026] 氧化鋁膜：20 [0027] 奈米孔：22 [0028] 側壁：221 [0029] 底壁：223 [0030] 頂表面：24 ® [0031] 真空鍍膜層：30 099137895 表單編號A0101 第7頁/共11頁 0992066045-0201219607 s. [0001] [0003] [0004] [0005] [0007] [0008] [0008] [Technical Description of the Invention] The present invention relates to an aluminum product and a preparation method thereof . [Prior Art] Due to its light weight and excellent machinability, Lu and Sau alloys are widely used in various household appliances, automobiles, and electronic products. In order to obtain a good appearance effect, a decorative layer of a certain color is usually formed on the surface of the inscription or the silver alloy product by surface decoration treatment such as anodizing, electrophoretic painting, painting, etc., and the color of the decorative layer obtained by the above treatment is usually It is fixed 'lack of change and diversity. As the level of consumption increases, this appearance is no longer sufficient for consumers to pursue these products. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an aluminum article having a variety of colors and having a better decorative effect. Further, it is necessary to provide a method for preparing the above aluminum article. An aluminum product comprising an aluminum substrate and an aluminum oxide film formed on the surface of the aluminum substrate, wherein a plurality of nanopores are distributed inside and on the surface of the aluminum oxide film, and the nanopore has a pore diameter of 20 to 200 nm, and the aluminum product Further, a #color transparent vacuum mineral film layer formed on the surface of the oxidized film is formed, and the thickness of the hollow film layer is 10 to 15 〇ϋπι. - a method for preparing a product, comprising the steps of: providing an aluminum substrate; 099137895 Form No. 1010101 Page 3 of 11 0992066045-0 201219607 [0009] Anodizing to form an aluminum oxide film on the surface of the aluminum substrate, The inside and the surface of the aluminum oxide film are distributed with a plurality of nanopores, and the pores of the nanopores are 20 to 200 nm; [0010] vacuum coating treatment to form a colorless transparent vacuum coating layer on the surface of the aluminum oxide film, the vacuum coating The thickness of the layer is 10 to 150 nm. [0011] Compared with the prior art, the aluminum article is first formed into a nanoporous alumina film on the surface of the aluminum substrate by anodizing, and a vacuum coating layer is formed on the surface of the porous alumina film by a vacuum coating method. The vacuum coating layer has a surface contoured structure of an aluminum oxide film, so that the vacuum coating layer also has a nanoporous structure. Therefore, under the illumination of light, the vacuum coating layer reflects and refracts light to exhibit interference color, and the nanoporous characteristics of the vacuum bonding layer make the aluminum product exhibit different colors as the viewing angle changes. Produces a variety of color-changing effects and has a better decorative effect. [0012] Referring to FIG. 2, an aluminum article 100 according to a preferred embodiment of the present invention includes an aluminum substrate 10, a nanoporous alumina film 20 formed on the surface of the aluminum substrate 10, and a glass film 20 formed thereon. A layer of colorless transparent vacuum coating layer 30 [0013] The material of the aluminum substrate 10 is pure aluminum or aluminum alloy. Referring to FIG. 1, a plurality of nanopores 22 are disposed inside and on the surface of the aluminum oxide film 20. The pore diameter of the nanopore 22 ranges from 20 to 200 nm, preferably from 30 to 60 nm. When the pore diameter is less than 20 nm, it is easy. The clogging is filled by the vacuum coating layer 30. The thickness of the aluminum oxide film 20 is 50 to 500 nm. The aluminum oxide film 20 is formed by oxidation treatment of the anode 099137895 Form No. A0101 Page 4 of 11 0992066045-0 201219607. [0015] [0018] The vacuum coating layer 30 is formed on the top surface 24 of the aluminum oxide film 20 and the sidewall 221 and the bottom wall 223 of the nanopore 22 such that the vacuum coating layer 30 The surface contoured structure having the oxide film 20 does not substantially change the surface structure of the aluminum oxide film 20 after the key is applied to the oxidized film 2, and the nanopore 22 is not blocked by the vacuum plating layer 30. The vacuum coating layer 30 may be formed of a metal, a metal oxide or a non-metal oxide, wherein the metal may be titanium, chromium, aluminum, zinc, and antimony, and the metal oxide may be an oxide of chromium, aluminum, zinc, and zirconium. The metal oxide can be dioxin. The thickness of the vacuum recording film layer 3 is in the range of 10 to 150 nm. Moreover, the thickness of the vacuum mineral film layer 30 on the side wall 221 is smaller than the thickness of the vacuum mineral film layer 30 on the top surface 24 and the bottom wall 223. The vacuum coating layer 30 on the side wall 221 has a thickness of from 1 〇 to 6 〇 nm; and the vacuum coating layer 3 位于 on the top surface 24 and the bottom wall 223 has a thickness of 50 to 150 nm, preferably 50 to 90 nm. When the thickness is in the range of 1 〇 15 15 11111, the vacuum coating layer 30 is nearly colorless and transparent, and when the thickness exceeds 15 〇 11111, the color of the vacuum coating layer 30 itself becomes more apparent under the naked eye, and the preparation method of the above aluminum product 100 The method includes the following steps: First, the aluminum substrate 10 is provided. The aluminum substrate 10 is pretreated. The pretreatment includes degreasing and chemical polishing of the aluminum substrate 10. Wherein the degreasing step can be washed with acetone for about 5 minutes, ultrasonically vibrated in ethanol for about 30 mi η, and then washed with water. The polishing liquid used for the chemical polishing may be a mixed solution of a dish with a volume ratio of 3:1:1 (quality concentration: 85%), nitric acid and water, and a polishing liquid for polishing 099137895 Form No. 1010101 Page 5 of 11 0992066045-0 201219607 [0020] [0021] 099137895 The temperature is between 70 and 80 ° C, and the polishing time is about 5 minutes. The aluminum substrate 1〇 subjected to the above pretreatment is anodized to form the porous gasification layer on the surface (see FIG. n. The electrolyte used for the anodization may be a sulfuric acid solution, an oxalic acid solution or a Wei solution. The concentration of sulfuric acid may be 〇. 2~〇. 5mol/L, the temperature of the electrolyte is 8~12°C, the voltage is 15~50V, the oxidation time is 3~1〇min; when the oxalic acid solution is used, the concentration of oxalic acid can be 〇. 2~〇· 5m〇i/L, the electrolyte temperature is 5°C, the voltage is 30~60V, the oxidation time is 3~1〇min; when the phosphoric acid solution is used, the phosphoric acid concentration can be 8,wt %, the electrolyte temperature is 2 to 7 ° C, the voltage is 10 {H20 spleen, the oxidation time is 3 to i 〇 min. The anodized body of the above-mentioned anodized body 1 (ί: the surface forms the oxygen scent, the oxidation The inside and the surface of the film 2G are divided into a plurality of nanopores. The vacuum substrate treatment is performed on the inscription substrate 1Q on which the oxidation_20 is formed to form the transparent vacuum mineral film layer 3 () on the surface of the oxygen oxide. The vacuum key film method can adopt (10) plating money. The (4) specific process can adopt the conventional method and art of the corresponding method, and the coating is difficult to use. Controlling the bond film time to (4) the real money __ is mixed within the above range to ensure that the vacuum coating layer 30 is colorless and transparent. The inscription product (10) of the present invention first forms a nano-oxidation lag on the surface of the county dragon by anodizing treatment. And forming a vacuum (four) layer 3 () on the surface of the porous oxide layer 20 by a plating method. The vacuum film layer has a surface imitation structure of oxidized (tetra) 20, and the nano-porous structure is also formed on the layer of the true reading film. Therefore, in the light _ shot, Lin 30 has reflection and refraction on the light to show the interference color plus the nanoporous feature of the vacuum mineral film layer 30, so that the Shao products just follow the observation angle work form number A0101 6 The page / total u page 0992066045-0 201219607 [0022] changes in different colors, resulting in a variety of color-changing effects, with a better decorative effect. [Illustration of the drawings] Figure 1 is a preferred embodiment of the surface of the present invention 2 is a schematic cross-sectional view of an aluminum substrate of a nanoporous oxide film. [0023] FIG. 2 is a cross-sectional view of an aluminum article according to a preferred embodiment of the present invention. [0024] [Main component symbol description] Aluminum product: 100 ❹ [0025] Aluminum matrix: 10 [00 26] Alumina film: 20 [0027] Nano hole: 22 [0028] Side wall: 221 [0029] Bottom wall: 223 [0030] Top surface: 24 ® [0031] Vacuum coating layer: 30 099137895 Form No. A0101 No. 7 Page / Total 11 pages 0992066045-0