{"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\/fr\/how-to-calculate-the-silica-sio%e2%82%82-purity-of-quartz-materials\/","title":{"rendered":"Comment calculer la puret\u00e9 de la silice (SiO\u2082) des mat\u00e9riaux en quartz"},"content":{"rendered":"

Pour commencer, vous aurez besoin d'un rapport GDMS (Glow Discharge Mass Spectrometry). Celui-ci peut \u00eatre utilis\u00e9 pour faire une premi\u00e8re estimation de la puret\u00e9 th\u00e9orique de la silice (SiO\u2082). Il convient toutefois de tenir compte des principales limitations et m\u00e9thodes de calcul suivantes :<\/p>\n\n\n\n

\"Donn\u00e9es
Rapport de donn\u00e9es GDMS<\/figcaption><\/figure>\n\n\n\n
\n\n\n\n

Rapport GDMS<\/h3>\n\n\n\n

1. Exemple de m\u00e9thode d'estimation de la puret\u00e9 du SiO\u2082<\/h4>\n\n\n\n

(1) M\u00e9thode de calcul direct (m\u00e9thode de d\u00e9duction de l'\u00e9l\u00e9ment principal)<\/strong><\/p>\n\n\n\n

Hypoth\u00e8se :<\/strong>
Le composant principal du tube de quartz est le SiO\u2082, et tous les autres \u00e9l\u00e9ments sont consid\u00e9r\u00e9s comme des impuret\u00e9s.<\/p>\n\n\n\n

Formule :<\/strong>
SiO\u2082 puret\u00e9 \u2248 100% - \u03a3 (teneur en tous les \u00e9l\u00e9ments d'impuret\u00e9)<\/p>\n\n\n\n

\u00c9tapes de calcul :<\/strong><\/p>\n\n\n\n

    \n
  1. Extraire du rapport les teneurs de tous les \u00e9l\u00e9ments d'impuret\u00e9 autres que l'oxyg\u00e8ne et le silicium (en ppm en poids).<\/li>\n\n\n\n
  2. Additionner les teneurs en impuret\u00e9s pour obtenir la teneur totale en impuret\u00e9s.<\/li>\n\n\n\n
  3. Soustraire le pourcentage d'impuret\u00e9s totales (ppm \u00f7 10 000) de 100%.<\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    (2) Calcul r\u00e9el (bas\u00e9 sur les donn\u00e9es du rapport)<\/strong><\/p>\n\n\n\n

    D\u00e9terminer la quantit\u00e9 totale d'impuret\u00e9s d\u00e9tect\u00e9es (unit\u00e9 : 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) + autres limites sup\u00e9rieures (par exemple, 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> (estimation prudente, calcul\u00e9e \u00e0 partir des limites sup\u00e9rieures)<\/p>\n\n\n\n

    SiO\u2082 Puret\u00e9 :<\/strong>
    100% - (18,73 \u00f7 10 000) = 99.8127%<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    (3) Facteurs de correction<\/strong><\/p>\n\n\n\n

      \n
    • \u00c9l\u00e9ments non d\u00e9tect\u00e9s :<\/strong> Les \u00e9l\u00e9ments marqu\u00e9s d'un \"-\" dans le rapport (tels que Au, Hg, etc.) peuvent \u00eatre inf\u00e9rieurs \u00e0 la limite de d\u00e9tection de l'instrument, mais ne sont pas comptabilis\u00e9s dans les impuret\u00e9s totales.<\/li>\n\n\n\n
    • La teneur en oxyg\u00e8ne n'est pas quantifi\u00e9e :<\/strong> Le rapport ne mentionne que l'oxyg\u00e8ne comme \"composant principal\", mais dans le SiO\u2082 r\u00e9el, l'oxyg\u00e8ne repr\u00e9sente 53,2% de sa composition (la correction du rapport st\u0153chiom\u00e9trique est n\u00e9cessaire).<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      2. \u00c9valuation de la puret\u00e9 Conclusion<\/h3>\n\n\n\n
        \n
      • La puret\u00e9 conservatrice :<\/strong> \u2265 99.81% (calcul\u00e9 en utilisant les limites sup\u00e9rieures des impuret\u00e9s d\u00e9tect\u00e9es par GDMS)<\/li>\n\n\n\n
      • La puret\u00e9 r\u00e9elle peut \u00eatre plus \u00e9lev\u00e9e :<\/strong> Si certains \u00e9l\u00e9ments se situent bien en dessous de leur limite sup\u00e9rieure (par exemple, le Fe n'est que de 0,1 ppm), la puret\u00e9 peut atteindre 99.9%<\/strong>.<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        3. Principales limites et consid\u00e9rations<\/h3>\n\n\n\n

        (1) Limites de la m\u00e9thode GDMS<\/strong><\/p>\n\n\n\n

          \n
        • Donn\u00e9es semi-quantitatives :<\/strong> Par exemple, un taux de Fe <0,5 ppm peut en r\u00e9alit\u00e9 \u00eatre de 0,1 ppm ou de 0,01 ppm, ce qui peut affecter de mani\u00e8re significative le calcul de la puret\u00e9.<\/li>\n\n\n\n
        • \u00c9l\u00e9ments lumineux manquants :<\/strong> Le GDMS a une faible capacit\u00e9 de d\u00e9tection pour les \u00e9l\u00e9ments l\u00e9gers tels que C et H, ce qui peut conduire \u00e0 une sous-estimation des impuret\u00e9s totales (par exemple, l'hydroxyle OH- n'est pas d\u00e9tect\u00e9).<\/li>\n<\/ul>\n\n\n\n

          (2) Comparaison avec les normes industrielles<\/strong><\/p>\n\n\n\n

          Qualit\u00e9 des mat\u00e9riaux<\/th>Exigence de puret\u00e9 typique de SiO\u2082<\/th>Puret\u00e9 estim\u00e9e par GDMS<\/th>R\u00e9pond \u00e0 la norme<\/th><\/tr><\/thead>
          Quartz de qualit\u00e9 industrielle<\/td>\u226599.5%<\/td>99.81%<\/td>\u2705 Oui<\/td><\/tr>
          Quartz de qualit\u00e9 photovolta\u00efque<\/td>\u226599.9%<\/td>Proche, mais incertain<\/td>\u26a0 V\u00e9rification ICP-MS n\u00e9cessaire<\/td><\/tr>
          Quartz de qualit\u00e9 semi-conducteur<\/td>\u226599.99%<\/td>Non atteint<\/td>\u274c Non<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
          \n\n\n\n

          4. Recommandations d'application pour le mat\u00e9riau<\/h3>\n\n\n\n
            \n
          • Usage industriel\/g\u00e9n\u00e9ral :<\/strong> Une puret\u00e9 de 99,8% est suffisante et peut \u00eatre utilis\u00e9e directement.<\/li>\n\n\n\n
          • Utilisation photovolta\u00efque\/semiconducteur :<\/strong>\n
              \n
            • Utiliser l'ICP-MS pour confirmer que les impuret\u00e9s m\u00e9talliques critiques (Fe, Na, etc.) sont r\u00e9ellement inf\u00e9rieures \u00e0 0,1 ppm.<\/li>\n\n\n\n
            • Compl\u00e9ter par un test FTIR pour d\u00e9terminer la teneur en hydroxyle (OH- < 5 ppm).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

              R\u00e9sum\u00e9 :<\/strong>
              Ce mat\u00e9riau appartient au quartz industriel de haute puret\u00e9 mais ne r\u00e9pond pas aux exigences de qualit\u00e9 des semi-conducteurs (4N5 ou 5N).<\/p>\n\n\n\n

              Base de d\u00e9cision :<\/strong>
              Si le processus du client est sensible \u00e0 la contamination par le Fe\/Na (par exemple, les cellules solaires PERC), la priorit\u00e9 doit \u00eatre donn\u00e9e \u00e0 la v\u00e9rification des niveaux d'impuret\u00e9 r\u00e9els.<\/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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