金紅石型雲母珠光顔料之研究

雲母表面披覆二氧化鈦複合材料之主要用途為珠光顔料，因光線干涉作用呈現珍珠及虹彩光澤，是近年發展最迅速的顔料之一。其表面之二氧化鈦結構是影響顔料光澤度重要因素。金紅石型（Rutile）較銳鈦礦型（Anatase）具有更高的折射率，因而有更佳之反射率、光澤度、遮蓋率及耐候等特性。由於煅燒過程中二氧化鈦薄膜層會受到白雲母基質影響，傾向生成銳鈦礦。本研究以四氯化鈦水解反應法進行披覆製備珠光顔料，探討SnO2添加量、煅燒溫度對披覆TiO2層A-R相變之影響。實驗結果顯示：先在白雲母表面披覆少量SnO2（SnO2/白雲母=0.30wt%），然後再披覆上25.5 wt% TiO2（TiO2/Pigment），經850℃煅燒1小時，即可製得約含77﹪金紅石的珠光顔料，惟繼續增添至2.0%，因受到基質中Si、Al等雜質擴散之影響，金紅石含有率不易達到100﹪。煅燒溫度在750℃、850℃、950℃對珠光顔料A-R相變化量及色澤之影響不明顯，但在1050℃煅燒後，受到TiO2本身在高溫相變化之影響，其Rutile相含量普遍增加，同時顏色明顯偏黃而且光澤偏差。綜合考量SnO2摻雜量及煅燒溫度對製備金紅石型雲母珠光顔料之影響，SnO2最經濟之添加量約在≧0.30﹪，即接近可以最少掺雜量達到最大金紅石形成量。因此在本研究披覆反應條件下，最適當之SnO2摻雜量範圍在≧0.30﹪~＜0.50﹪；煅燒溫度範圍在800℃~900℃。

關鍵字

雲母；金紅石；銳鈦礦；珠光顔料

並列摘要

Mica surface coating TiO2 can be used as pearlescent pigments due to interference of light. The microstructure of TiO2 on the mica surface is the major factor to affect the colorful luster of the pigment. The refraction index of rutile is higher than anatase and caused better feature of reflectance, luster, hiding power and weather resistance. Because of the characteristics of muscovite surface, TiO2 thin film is trending to form anatase after sintering. This research work was using titanium tetrachloride hydrolysis process to produce pearlescent pigments. Conferring the effect of Anatase-Rutile phase transformation in different additional SnO2 and sintering temperature. The experimental results show that before coating TiO2 (25.5%), small amount of SnO2 （SnO2/muscovite=0.30wt%）should coat at first layer on the muscovite surface. After sintering at 850℃ for 1 hr., 77% rutile based pearlescent pigment can be produced. Due to the impurity diffusion effect on the muscovite surface, the containing of rutile on the muscovite surface cannot reach 100%. When sintered at 750℃, 850℃, and 950℃, the effect of Anatase-Rutile phase transformation and color-luster are not much different. However, After sintering at 1050℃, the containing of rutile increase. The color deflect to yellow and luster become worse due to the effect of TiO2 phase transformation at high temperature Investigating the influence of SnO2 dopant and sintering temperature on the production of rutile-coated mica pearlescent pigments, the most economic dopant concentration of SnO2 is ≧0.30%, approaching to the maximum quantity of rutile formation. According to the experiment results, SnO2 dopant weight at ≧0.30﹪~＜0.50﹪and sintering temperature at 800℃~900℃ are believed to be an optimum range for fabricating pearlescent pigments.

並列關鍵字

Mica ； Rutile ； Anatase ； pearlescent pigments

參考文獻

[1] Tan Junru, Han Yunfang, Hou Wenxiang, Chen Xiuzeng, Fu Xiansong, "The preparation and characteristics of cobalt blue mica coated titania pearlescent pigment," Dyes and Pigments 52 , 2002, pp. 215-222.

[2] Tan Junru, Fu Xiansong, Hou Wenxiang, Chen Xiuzeng, Wang Li, "The preparation and characteristics of a multi-cover-layer type, blue mica titania, pearlescent pigment," Dyes and Pigments 56 , 2003, pp.93-98.

[3] Dieter Franz Klaus, Klaus Ambrosius, Stefan Wilhelm; Nita Katsuhisa, "Platelet-like colored pigments and process for producing the same," U.S. Patent No. 5540769,1996.

[4] Dieter Franz Klaus, Klaus Ambrosius, Constanze Prengel, "Lustrous lamellar pigments," European Patent No. 354374,1990.

[5] Dieter Franz Klaus, Klaus Ambrosius, August Kanpp; Bruecker Hans D., " Nacreous pigments," US Patent No. 4867793,1989.

國際替代計量

金紅石型雲母珠光顔料之研究

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