<p><b>超氧化鉀</b>，分子式KO<sub>2</sub>，是一級氧化劑，與水劇烈反應。超氧化鉀是由K<sup>+</sup>和O<sub>2</sub><sup>−</sup>組成的碳化鈣型粉末狀晶體。有吸濕性、順磁性。
</p>
<h2><span id=".E5.B7.A5.E4.B8.9A.E5.88.B6.E6.B3.95"></span><span id="工业制法">工業製法</span></h2>
<p>超氧化鉀的製備是在不鏽鋼置換釜內，以金屬鈉置換氯化鉀得到純度大於97％的金屬鉀，熔融的鉀壓送到特製的噴槍與經過淨化的空氣混合後噴入氧化爐，在230～250℃下燃燒生成超氧化鉀。
</p>
<h2><span id=".E5.8C.96.E5.AD.A6.E6.80.A7.E8.B4.A8"></span><span id="化学性质">化學性質</span></h2>
<p>超氧化鉀與水反應，生成氫氧化鉀和氧氣：
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4KO_{2}+2H_{2}O\rightarrow 4KOH+3O_{2}}">
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        <mn>4</mn>
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        <mo>+</mo>
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    <annotation encoding="application/x-tex">{\displaystyle 4KO_{2}+2H_{2}O\rightarrow 4KOH+3O_{2}}</annotation>
  </semantics></math></span></span>↑</dd></dl><p>實際上是<span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle K_{2}O_{4}}">
  <semantics>
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    <annotation encoding="application/x-tex">{\displaystyle K_{2}O_{4}}</annotation>
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</p>
<h2><span id=".E7.94.A8.E9.80.94"></span><span id="用途">用途</span></h2>

<p>由於超氧化鉀能和二氧化碳產生以下的化學反應而生成氧氣
</p>
<dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4KO_{2}+2CO_{2}\rightarrow 2K_{2}CO_{3}+3O_{2}}">
  <semantics>
    <mrow class="MJX-TeXAtom-ORD">
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        <mo>+</mo>
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          <mi>O</mi>
          <mrow class="MJX-TeXAtom-ORD">
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    <annotation encoding="application/x-tex">{\displaystyle 4KO_{2}+2CO_{2}\rightarrow 2K_{2}CO_{3}+3O_{2}}</annotation>
  </semantics></math></span></span></dd></dl><dl><dd><span><span><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4KO_{2}+4CO_{2}+2H_{2}O\rightarrow 4KHCO_{3}+3O_{2}}">
  <semantics>
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          <mrow class="MJX-TeXAtom-ORD">
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        <mi>O</mi>
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        <mn>4</mn>
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        <mi>H</mi>
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    <annotation encoding="application/x-tex">{\displaystyle 4KO_{2}+4CO_{2}+2H_{2}O\rightarrow 4KHCO_{3}+3O_{2}}</annotation>
  </semantics></math></span></span></dd></dl><p>所以，超氧化鉀可作為氧氣源用於呼吸面罩，以及飛船、潛艇等密閉系統的氧氣再生劑。
</p>
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**超氧化鉀**，分子式 KO2，是一級氧化劑，與水劇烈反應。超氧化鉀是由 K+ 和 O2−組成的碳化鈣型粉末狀晶體。有吸濕性、順磁性。

## 工業製法

超氧化鉀的製備是在不鏽鋼置換釜內，以金屬鈉置換氯化鉀得到純度大於 97％的金屬鉀，熔融的鉀壓送到特製的噴槍與經過淨化的空氣混合後噴入氧化爐，在 230～250℃下燃燒生成超氧化鉀。

## 化學性質

超氧化鉀與水反應，生成氫氧化鉀和氧氣：

　
: $4KO_{2}+2H_{2}O\rightarrow 4KOH+3O_{2}$ ↑

實際上是 $K_{2}O_{4}$

## 用途

由於超氧化鉀能和二氧化碳產生以下的化學反應而生成氧氣

　
: $4KO_{2}+2CO_{2}\rightarrow 2K_{2}CO_{3}+3O_{2}$

　
: $4KO_{2}+4CO_{2}+2H_{2}O\rightarrow 4KHCO_{3}+3O_{2}$

所以，超氧化鉀可作為氧氣源用於呼吸面罩，以及飛船、潛艇等密閉系統的氧氣再生劑。
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