本研究以高能研磨Talc-Al2O3-SiO2原料系統(TAS)證明製造非晶質SiO2環境可造成AlVI的生成。以此原理在Talc-Al2O3-Kaolinite原料系統(TAK)合成α-Cordierite過程，藉外加堇青石粉末於原料粉末中，造成高非晶質SiO2環境於α-Cordierite生成溫度區間發生，使對應出現的AlIV直接接近同步合成α-Cordierite。達成簡化固態反應合成堇青石的路徑。也使合成溫度從以往的1350℃降低至1250℃。
堇青石屬環狀矽酸鹽礦物。基礎結構是鋁氧及矽氧四面體組成的六連環。工業上常用的固態反應法，因固體間的擴散距離相對較遠且均勻度較差，堇青石的合成路徑複雜，導致熱處理溫度高，提高了合成的難度和成本，同時對堇青石產品的性質產生了一定的影響。根據溶膠凝膠法合成堇青石的操作程序，可知堇青石的生成需要先形成Si-O-AlIV鍵結，再出現四面體組成的六連環。因此由TEOS和含Al前驅物反應先引發Si-O-AlIV，可以使α-Cordierite於低溫合成。
四面體的Al-O鍵結長度為1.76~1.77Å，因此可以取代Si4+(Si-O鍵結長度最長為1.77 Å)。Si-O-AlIV結構在自然界常見於造岩礦物的矽酸鹽礦物，如單鏈矽酸鹽的普通輝石(Augite)、片狀矽酸鹽的黑雲母(Biotite)、架狀矽酸鹽的長石(Feldspar)等。此外在環狀矽酸鹽也會出現，如堇青石(Cordierite)、大隅石(Osumilite)。環狀矽酸鹽礦物的生成和氣成(Pneumatolytic)礦物有關，大多和偉晶岩共生。也會在流紋岩中生成。綜觀來說，環狀矽酸鹽或AlIV的生成條件為高流動性或玻璃質環境，可利用高水含量或是固態中相對容易移動(擴散)的玻璃質來促進離子遷移生成環狀矽酸鹽礦物相。在Al2O3-SiO2溶液或玻璃中，Al3+主要為四或五配位，但在Al2O3比例較高的玻璃中會由五配位、六配位的Al進行電荷補償。文獻分析在SiO2-Al2O3玻璃中，存在Si,Al-O四面體網絡，氧原子出現在Si-O-AlV、Si-O-AlIV、Si-O-Si鍵結中。因此創造高溫及流動性高的非晶質/玻璃質SiO2環境，即有機會使AlIV生成，製造鋁矽六連環。
本研究利用高能研磨將TAS原料系統進行研磨，使原料非晶質化，讓其中的SiO2也轉為非晶質相，證明非晶質SiO2環境可以造成AlIV(-O-Si)出現，並製造六連環。結果顯示AlIV和Amorphized SiO2濃度呈正相關，且隨研磨時間增加，單位Amorphized SiO2造成的AlIV(Si-O-AlIV)增加，[IV]Al使用率增加。高能研磨製造出的高濃度AlIV(Si-O-AlIV)粉末原料，可於低溫製造六連環礦物Mg-Osumilite，證明AlIV(Si-O-AlIV)可製造六連環。然而因在低溫即存在 AlIV，使六連環礦物Mg-Osumilite於低溫先出現，再和Spinel反應生成α-Cordierite，所以仍須兩步驟才能生成堇青石。
利用上述原理，直接在α-Cordierite生成溫度區間製造高非晶質SiO2環境，幫助AlIV大量生成，則有機會簡化TAK系統合成堇青石的路徑。TAK系統本身即可由滑石及高嶺石提供足量的非晶質SiO2。利用外加堇青石降低Al2O3對滑石的反應濃度，並阻礙Al2O3的擴散，可強制延後第一階段於低溫發生的氧化鋁與Enstatite的反應延至α-Cordierite生成溫度區間發生。外加堇青石量使滑石表面分配到的成分Al2O3減少2.70%以上，可將第一階段反應由1050℃延後至1200℃，和第二階段的Mullite 與Enstatite反應同步發生。使滑石與高嶺石釋出的非晶質SiO2在α-Cordierite生成區間同時存在，幫助AlVI至AlIV(Si-O-AlIV)的轉移在此溫度區間發生，則可直接生成α-Cordierite。在1250℃熱處理10分鐘直接合成α-Cordierite。
本研究證明利用高能研磨TAS(滑石-氧化鋁-氧化矽)原料系統製造非晶質SiO2有助於AlVI至AlIV(Si-O-AlIV)的轉移，製造六連環。在滑石-氧化鋁-氧化矽 (TAK)原料系統中外加堇青石，利用上述原理，在α-Cordierite生成溫度區間製造高非晶質SiO2濃度，幫助AlIV生成，直接合成α-Cordierite。達到簡化堇青石合成路徑，減少中間相殘留的目的，有助於提高堇青石的粉末純度。合成溫度較以往的低100℃(自1350℃降至1250℃)。此研究成果為工業界降低堇青石合成溫度並實現純相堇青石的製備，提供了另一重要的方向。

This study focuses on the synthesis of α-cordierite using common solid-state reaction raw material systems: talc-alumina-silica (TAS) and talc-alumina-kaolinite (TAK), which provide a basis for creating an amorphous SiO2 environment. It has been demonstrated that amorphous SiO2 can induce the transition of AlVI to AlIV(Si-O-AlIV) and trigger this transformation within the α-cordierite formation range, resulting in direct α-cordierite phase synthesis. This simplifies the synthesis pathway, reduces intermediate phase residues, and lowers the synthesis temperature from the previous 1350°C to 1250°C.
According to sol-gel methods, the formation of Si-O-AlIV bonds is a prerequisite for α-cordierite formation.
Through high-energy milling of the TAS system, this study confirms that amorphous SiO2 can induce AlIV(Si-O-AlIV) formation, thereby constructing hexagonal rings. Employing the aforementioned principle, the action of generating AlIVfrom amorphous SiO2 is shifted to the α-cordierite formation temperature range, achieving a simplified synthesis pathway. By incorporating additional cordierite in the TAK system, the diffusion of Al2O3 is hindered, delaying the first-stage reaction to coincide with the second stage. This allows the amorphous SiO2 released by talc and kaolinite to induce AlIV(Si-O-AlIV) formation, enabling the direct production of high-temperature α-cordierite. α-cordierite can be synthesized directly at 1250°C for 10 minutes, achieving the aim of streamlining the cordierite synthesis pathway and lowering synthesis temperatures.

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