在线黄片网欧美 国产

  • <tr id='wD4GQe'><strong id='wD4GQe'></strong><small id='wD4GQe'></small><button id='wD4GQe'></button><li id='wD4GQe'><noscript id='wD4GQe'><big id='wD4GQe'></big><dt id='wD4GQe'></dt></noscript></li></tr><ol id='wD4GQe'><option id='wD4GQe'><table id='wD4GQe'><blockquote id='wD4GQe'><tbody id='wD4GQe'></tbody></blockquote></table></option></ol><u id='wD4GQe'></u><kbd id='wD4GQe'><kbd id='wD4GQe'></kbd></kbd>

    <code id='wD4GQe'><strong id='wD4GQe'></strong></code>

    <fieldset id='wD4GQe'></fieldset>
          <span id='wD4GQe'></span>

              <ins id='wD4GQe'></ins>
              <acronym id='wD4GQe'><em id='wD4GQe'></em><td id='wD4GQe'><div id='wD4GQe'></div></td></acronym><address id='wD4GQe'><big id='wD4GQe'><big id='wD4GQe'></big><legend id='wD4GQe'></legend></big></address>

              <i id='wD4GQe'><div id='wD4GQe'><ins id='wD4GQe'></ins></div></i>
              <i id='wD4GQe'></i>
            1. <dl id='wD4GQe'></dl>
              1. <blockquote id='wD4GQe'><q id='wD4GQe'><noscript id='wD4GQe'></noscript><dt id='wD4GQe'></dt></q></blockquote><noframes id='wD4GQe'><i id='wD4GQe'></i>
                英語閱讀 學英語,練聽力,上聽力課堂! 註冊 登錄
                > 輕松閱讀 > 英語漫讀 >  內容

                科學家們找到了用誰勝誰負可不好說微波爐制造納米石墨的簡♀單新方法》

                所屬教程:英語漫讀

                瀏覽:

                zhaoshasha

                2021年01月11日

                手機版
                掃描二維碼方便學習和分享
                Scientists Find New And Simple Way To Make Nano-Graphite With A Microwave Oven

                科學家們找到了用微波爐制造納米石墨的簡單新方法↑

                Nano-graphite is an important material employed in lubricants, fire extinguishers, and lithium batteries as graphite is a good conductor of heat and electricity. However, graphite reserves are finite and extraction of this mineral comes with hefty environmental concerns. Now, researchers have found a cheap and easy way to produce it. You just need some copper foil, a glass container full of coal powder, and a conventional microwave oven.

                納米石墨是一種熱和電的良好導體,是潤滑劑、滅火器和鋰電池的重要材料。然而,石墨儲量是№有限的,開采這種礦物會帶來嚴重的環境問題。現在,研究人員發現了一種廉價▃而簡單的生產方法。你只需要一些那么重銅箔,一個裝滿煤粉的玻璃容器,和一個傳╱統的微波爐。

                Detailed in the journal Nano-Structures & Nano-Objects, pulverized coal is sealed in a container with a mixture of hydrogen and argon and some aptly cut copper foil. This is then placed in a microwave. If you've ever made the mistake of putting something metallic in a microwave before, you know what happens next: sparks!

                在《納米結構與納米物體》雜誌上詳細介紹,煤粉被密封在一個 朝元豐點了點頭容器中,與氫氣和』氬氣的混合物和一些適當切割的銅箔。然後將其放入微波爐。如果你曾經犯每一道都是攻擊恐怖過把金屬物品放進微波爐的錯誤,你知道接下來會發生什∏麽:火花!

                Dr Alfredo Carpineti

                “By cutting the copper foil into a fork shape, the sparks were induced by the microwave radiation, generating an extremely high temperature of more than 1,800 degrees Fahrenheit within a few seconds,” lead author Christoffer Masi from the University of Wyoming said in a statement. “This is why you shouldn’t place a metal fork inside a microwave oven,” he added.

                研究報告的第一作者、懷俄明大學的克裏斯多夫·馬西在一份聲明中〓說:“將銅箔切成叉子狀,微波輻射會產生火花,幾秒鐘內就會產生超呼過1800華氏度的高溫。”他補充說:“這就是為什麽你不應〓該把金屬叉子放在微波爐裏的原因。”

                When the coal powder was exposed to those 980°C (1,800°F) sparks, the temperature was high enough to turn it into polycrystalline graphite. The hydrogen also helps in the process. The team tested this approach with times ranging between 3-45 minutes. The optimal duration for the process was found to be around 15 minutes.

                當煤粉暴露在攝氏980度(1800華氏度)的火▲花下時,溫度高到足以使其變成多晶石墨。氫在這個過程中也有幫助。該團隊用3-45分鐘的時間測試了這種方法。該過程的最佳持續時間約為15分鐘。

                Graphite is a good conductor of heat and elect

                This may sound a bit like scientists playing around with equipment they have lying around at home but it could actually have some important real-world applications. “This method provides a new route to convert abundant carbon sources to high-value materials with ecological and economic benefits,” the team wrote in the study. “Finite graphite reserves and environmental concerns for the graphite extraction procedures make this method of converting coal to graphite a great alternative source of graphite production.”

                這聽起↑來可能有點像科學家們在家裏擺弄他♀們的設備,但它實際何林也是大笑一聲上可能有一些重要的現實應用。該研究小這可是城市組在研究報告中寫道:“這種方法為將豐富的碳源轉化為具有生態和經濟效益的高價值材料提供了一條新途徑。”出於對戰狂哈哈一笑有限的石墨儲量和對石墨開采過程的環境考慮,使這種將煤轉化為石墨的方法成為石墨生產的一個很好的替代但最讓他高興來源。

                This is not the first time that coal has been refined using microwave technology. Previous approaches saw the reduction of moisture or the removal of certain minerals such as sulfur also achieved by employing microwave ovens. The drawback in those methods is the requirement that the coal undergoes particular chemical pre-treatment for the reactions to take place, which is not needed with this new technique.

                這並不是第一次用微波技術精煉煤炭。以前的方法可以◆減少水分或去除某些礦物質,如硫,也可以通過使用微波爐來實現。這些方法的缺點是需要對煤⌒ 進行特殊的化學預處理升龍道才能發生反應,而新技術不需要這種預處理。

                The researchers believe that this technology can be scaled up and the material involved changed, with the goal of improving on the quality and yield of the nano-graphite produced.

                研究人⌒員認為,這項技術可以擴大規模,所涉及的材料 嗤也會發生變化,其目√標是提高納米石墨的質量和產量。

                “The small thermal load makes this method cost-effective and has potential for higher temperature using metals with higher melting temperature,” the authors write. “Refinement of this technique is possible to yield a higher quality and quantity of nano-graphite materials for a wider range of applications.”

                作者寫道:“小的熱負荷使得這種方法具有成本效益,並且有潛力使用具有更高熔化溫度的金屬達到更高的溫度。”“對這項技術的改進有可能生產出質量★和數量都更高的納米石墨材料,用ω 於更廣泛的應用。”


                用魂飛魄散手機學英語,請加聽力課堂微信公眾號:tingclass123
                用戶搜索

                瘋狂英語 英語語法 新概念¤英語▓ 走遍美國 四級聽力 英語音標 英語入門 發音 美語 四級 新東方 七年級 賴世雄 zero是這越往后面什麽意思

                • 頻道推薦
                • |
                • 全站推薦
                • 廣播聽力
                • |
                • 推薦下載
                • 網站推薦