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</p> <p class="p1"> <br /> </p> <p class="p1"> <span>對于大多數人來說，氟可能是“最熟悉的陌生人”。我們每天都接觸它，卻根本都不知道牙膏里為什么要添加氟，加了氟好不好？其實氟是我們熟悉又陌生的朋友，近年來，大家談氟色變，卻不知道氟在我們生活當中扮演著重要的角色，它與我們的生活息息相關。</span> </p> <p class="p3" style="text-align:center;"> <img src="/temp/1630634803563.jpg" /> </p> <p class="p3"> <span> 1、我國磷礦伴生氟資源儲量</span> </p> <p class="p1"> <span>中國氟化工行業絕大多數產品都以螢石為傳統原材料。中國螢石基礎儲量為1.1億噸，可開采儲量為0.24億噸，分別位居世界第一位和世界第三位。近些年隨著過度開采及資源向外流失使得中國螢石資源瀕臨枯竭。</span> </p> <p class="p1"> <span>除螢石之外，氟在自然界以另一種存在形式伴生于磷礦石中，由于其相比于螢石的巨大儲量，使得磷礦石成為具有較高利用價值的含氟資源。中國磷礦石保有儲量為37億噸，按3%-4%的含氟量計算，磷礦石中的氟資源約有1.11-1.48億噸；</span> </p> <p class="p3"> <span> 2、氟的主要用途</span> </p> <p class="p3"> <span>用于合成氟利昂等冷卻劑；</span> </p> <p class="p3"> <span>用于制氟化試劑（二氟化氙等）以及金屬冶煉中的助熔劑（冰晶石等）等；</span> </p> <p class="p3"> <span>ClF3與BrF3可作火箭燃料的氧化劑；</span> </p> <p class="p3"> <span>用于制殺蟲劑與滅火劑；</span> </p> <p class="p3"> <span>氟代烴可用于血液的臨時代用品；</span> </p> <p class="p3"> <span>氟化物玻璃纖維制成的光導纖維，效果比SiO2的光導纖維效果大百倍；</span> </p> <p class="p3"> <span>含氟塑料和含氟橡膠有特別優良的性能；</span> </p> <p class="p3"> <span>3、氟與我們的生活息息相關</span> </p> <p class="p1"> <span>氟是人體必需的14種微量元素之一，也是人體組成成分之一。適量氟化物可對機體的代謝產生一定的積極影響，起到預防疾病發生的作用。缺氟可以引起鈣、磷代謝的障礙。</span> </p> <p class="p1"> <span>大量證據說明適量氟能維持牙的健康，缺氟能增加人體對齲病的易感性。在自然界，它是化學活性最強的非金屬元素之一，也是最具有反應性的負電離子，具有極強的結合性，人體內大多數的氟，都存在于骨骼和牙齒內。二戰以前，還沒有出現用氟加工的商業產品，直到制造原子彈時，對鈾的需求，才促使氟的產業化制造?，F在，我們生活里的很多日用品可能都含有氟，比如，氟利昂制冷劑、一些殺蟲劑和滅火劑，以及一些含氟玻璃和塑料等，最熟悉的，要數牙膏了。我們含氟藥膏中的氟化物通常為以下兩種：氟化鈉NaF和單氟磷酸鈉Na2PO3F，在1955年，寶潔公司率先在全球范圍內推出了含氟牙膏。它不僅是首支通過美國牙科協會(ADA)認證的牙膏，并且是首支獲得授權在廣告中使用美國牙科協會名稱的牙膏。1976年，佳潔士含氟牙膏被美國化學會公認為近100年中的100項偉大發明之一。</span> </p> <p class="p3" style="text-align:center;"> <img src="/temp/1630634803575_1000X560.jpg" /> </p> <p class="p1"> <span>氟生理功能：</span> </p> <p class="p1"> <span>成骨質作用：氟在骨骼的形成中有重要作用。適量的氟有利于鈣和磷的利用和在骨骼中的沉積，加速骨鹽的形成，促進生長，并使骨質堅硬。老年人缺氟時，鈣、磷的利用受到影響，導致骨質硫松，因此，氟對骨質疏松有一定的預防作用，比單純增加鈣更有效。缺氟時易發生骨折、骨折后愈合期延長等。</span> </p> <p class="p1"> <span>預防齲齒：氟也是牙齒的重要成分，它在牙齒表面與磷形成-層堅硬的氟磷灰石的保護層，能抗酸的腐蝕，有防止齲齒的作用。</span> </p> <p class="p1"> <span>預防動脈鈣化：氟有一定預防動脈鈣化作用。</span> </p> <p class="p1"> <span>供給量：</span> </p> <p class="p1"> <span>食物缺乏氟易患齲齒，成年人易出現骨質硫松癥、易骨折、骨折后愈合延緩等；但攝入過多，可發生氟中毒（氟骨?。?，牙齒出現褐黃色斑點，易于折碎，腰腿疼痛，脊柱前彎等。合適的供給量成人每日男女相近，需0.5～1.0毫克。氟主要由飲水、食物中水提供。</span> </p> <p class="p1"> <span>由此可見，世界上沒有絕對有害的物質，也沒有絕對有益的物質，唯一的區別就是它們的劑量。研究化學的意義就是如何最大限度的利用各種物質為人類造福，而使它們帶來的危害最小化。</span> </p> <p class="p3"> <br /> </p> <p class="p3"> <br /> </p> <p class="p3"> <br /> </p> <p class="p3"> <br /> </p> <style type="text/css">.b1{white-space-collapsing:preserve;} .b2{margin: 1.0in 1.25in 1.0in 1.25in;} .p1{text-indent:0.29166666in;text-align:justify;hyphenate:auto;font-family:Calibri;font-size:10pt;} .p2{text-indent:0.5in;text-align:center;hyphenate:auto;font-family:Calibri;font-size:18pt;} .p3{text-align:justify;hyphenate:auto;font-family:Calibri;font-size:10pt;} </style> </div> </div> <div class="h10"></div> <div class="articlePage wow fadeInUp"> </div>  </div> <div class="fotA"> <div class="pageUpbtn fl"> <i 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