{"id":957,"date":"2025-08-12T07:23:59","date_gmt":"2025-08-12T07:23:59","guid":{"rendered":"https:\/\/totalquartzworks.com\/?p=957"},"modified":"2026-04-24T01:44:12","modified_gmt":"2026-04-24T01:44:12","slug":"how-to-calculate-the-silica-sio%e2%82%82-purity-of-quartz-materials","status":"publish","type":"post","link":"https:\/\/quartz.10smt.com\/de\/how-to-calculate-the-silica-sio%e2%82%82-purity-of-quartz-materials\/","title":{"rendered":"Wie berechnet man die Reinheit von Quarz (SiO\u2082)"},"content":{"rendered":"

Zu Beginn ben\u00f6tigen Sie einen GDMS-Bericht (Glimmentladungs-Massenspektrometrie). Dieser kann f\u00fcr eine vorl\u00e4ufige Sch\u00e4tzung der theoretischen Reinheit von Siliziumdioxid (SiO\u2082) verwendet werden. Dabei sind jedoch die folgenden wichtigen Einschr\u00e4nkungen und Berechnungsmethoden zu beachten:<\/p>\n\n\n\n

\"GDMS-Daten\"
GDMS-Datenbericht<\/figcaption><\/figure>\n\n\n\n
\n\n\n\n

GDMS-Bericht<\/h3>\n\n\n\n

1. Beispielmethode zur Sch\u00e4tzung der SiO\u2082-Reinheit<\/h4>\n\n\n\n

(1) Direkte Berechnungsmethode (Hauptbestandteil-Abzugsmethode)<\/strong><\/p>\n\n\n\n

Vermutung:<\/strong>
Der Hauptbestandteil des Quarzrohrs ist SiO\u2082, und alle anderen Elemente gelten als Verunreinigungen.<\/p>\n\n\n\n

Formel:<\/strong>
SiO\u2082-Reinheit \u2248 100% - \u03a3 (Gehalt an allen Verunreinigungselementen)<\/p>\n\n\n\n

Berechnungsschritte:<\/strong><\/p>\n\n\n\n

    \n
  1. Entnehmen Sie dem Bericht den Gehalt aller Verunreinigungselemente au\u00dfer Sauerstoff und Silizium (in Gewichts-ppm).<\/li>\n\n\n\n
  2. Addieren Sie die Verunreinigungsgehalte, um den Gesamtgehalt an Verunreinigungen zu erhalten.<\/li>\n\n\n\n
  3. Der Gesamtprozentsatz der Verunreinigung (ppm \u00f7 10.000) wird von 100% abgezogen.<\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    (2) Tats\u00e4chliche Berechnung (basierend auf Berichtsdaten)<\/strong><\/p>\n\n\n\n

    Bestimmen Sie die Gesamtmenge der nachgewiesenen Verunreinigungen (Einheit: ppm):<\/p>\n\n\n\n

    Li (0,16) + B (1,1) + Na (0,29) + Mg (0,05) + Al (11) + Ti (3,4) + K (0,58) + andere Obergrenzen (z. B. Fe <0,5, Cr <0,5...)<\/p>\n\n\n\n

    \u2248 0,16 + 1,1 + 0,29 + 0,05 + 11 + 3,4 + 0,58 + 0,5 (Fe) + 0,5 (Cr) + 0,05 (Ni) + 0,1 (Cu) + 1 (Ca)<\/p>\n\n\n\n

    \u2248 18,73 ppm<\/strong> (konservative Sch\u00e4tzung, berechnet anhand von Obergrenzen)<\/p>\n\n\n\n

    SiO\u2082 Reinheit:<\/strong>
    100% - (18,73 \u00f7 10.000) = 99.8127%<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    (3) Berichtigungsfaktoren<\/strong><\/p>\n\n\n\n

      \n
    • Unentdeckte Elemente:<\/strong> Elemente, die im Bericht mit \"-\" gekennzeichnet sind (z. B. Au, Hg usw.), k\u00f6nnen unterhalb der Nachweisgrenze des Ger\u00e4ts liegen, werden aber nicht zu den Gesamtverunreinigungen gez\u00e4hlt.<\/li>\n\n\n\n
    • Sauerstoffgehalt nicht quantifiziert:<\/strong> In dem Bericht wird Sauerstoff nur als \"Hauptbestandteil\" bezeichnet, aber im tats\u00e4chlichen SiO\u2082 macht Sauerstoff 53,2% der Zusammensetzung aus (eine Korrektur des st\u00f6chiometrischen Verh\u00e4ltnisses ist erforderlich).<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      2. Reinheitsbewertung Schlussfolgerung<\/h3>\n\n\n\n
        \n
      • Konservative Reinheit:<\/strong> \u2265 99,81% (berechnet anhand der Obergrenzen der mit GDMS nachgewiesenen Verunreinigungen)<\/li>\n\n\n\n
      • Der tats\u00e4chliche Reinheitsgrad kann h\u00f6her sein:<\/strong> Wenn einige Elemente weit unter ihren oberen Grenzwerten liegen (z. B. Fe nur 0,1 ppm), k\u00f6nnte die Reinheit bis zu 99.9%<\/strong>.<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        3. Wichtige Einschr\u00e4nkungen und Erw\u00e4gungen<\/h3>\n\n\n\n

        (1) Beschr\u00e4nkungen der GDMS-Methode<\/strong><\/p>\n\n\n\n

          \n
        • Semi-quantitative Daten:<\/strong> So kann beispielsweise Fe <0,5 ppm in Wirklichkeit 0,1 ppm oder 0,01 ppm sein, was die Reinheitsberechnung erheblich beeinflussen kann.<\/li>\n\n\n\n
        • Fehlende Leuchtelemente:<\/strong> GDMS hat ein schwaches Nachweisverm\u00f6gen f\u00fcr leichte Elemente wie C und H, was zu einer Untersch\u00e4tzung der Gesamtverunreinigungen f\u00fchren kann (z. B. Hydroxyl OH- nicht nachgewiesen).<\/li>\n<\/ul>\n\n\n\n

          (2) Vergleich mit Industriestandards<\/strong><\/p>\n\n\n\n

          Material Klasse<\/th>Typische SiO\u2082-Reinheitsanforderung<\/th>Aus GDMS gesch\u00e4tzte Reinheit<\/th>Erf\u00fcllt die Norm<\/th><\/tr><\/thead>
          Quarz in Industriequalit\u00e4t<\/td>\u226599.5%<\/td>99.81%<\/td>\u2705 Ja<\/td><\/tr>
          Quarz f\u00fcr die Photovoltaik<\/td>\u226599.9%<\/td>Knapp, aber unsicher<\/td>\u26a0 ICP-MS-\u00dcberpr\u00fcfung erforderlich<\/td><\/tr>
          Quarz in Halbleiterqualit\u00e4t<\/td>\u226599.99%<\/td>Nicht erreicht<\/td>\u274c Nein<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
          \n\n\n\n

          4. Anwendungsempfehlungen f\u00fcr das Material<\/h3>\n\n\n\n
            \n
          • Industrielle\/allgemeine Nutzung:<\/strong> Eine Reinheit von 99,8% ist ausreichend und kann direkt verwendet werden.<\/li>\n\n\n\n
          • Verwendung von Photovoltaik\/Halbleitern:<\/strong>\n
              \n
            • Best\u00e4tigen Sie mit ICP-MS, ob kritische metallische Verunreinigungen (Fe, Na usw.) wirklich unter 0,1 ppm liegen.<\/li>\n\n\n\n
            • Erg\u00e4nzung durch FTIR-Tests zur Bestimmung des Hydroxylgehalts (OH- < 5 ppm).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

              Zusammenfassung:<\/strong>
              Dieses Material geh\u00f6rt zu den hochreinen Quarzen in Industriequalit\u00e4t, erf\u00fcllt jedoch nicht die Anforderungen an die Halbleiterg\u00fcte (4N5 oder 5N).<\/p>\n\n\n\n

              Entscheidungsgrundlage:<\/strong>
              Wenn der Prozess des Kunden empfindlich auf Fe\/Na-Verunreinigungen reagiert (z. B. PERC-Solarzellen), sollte der \u00dcberpr\u00fcfung des tats\u00e4chlichen Verunreinigungsgrads Priorit\u00e4t einger\u00e4umt werden.<\/p>","protected":false},"excerpt":{"rendered":"

              To begin, you will need a GDMS (Glow Discharge Mass Spectrometry) report. This can be used to make a preliminary […]<\/p>\n","protected":false},"author":4,"featured_media":960,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"How to Calculate the Silica (SiO\u2082) Purity of Quartz Materials","_seopress_titles_desc":"Methods for calculating SiO\u2082 purity in quartz materials using GDMS, key limitations, industry standards comparison, and application 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