{"id":317714,"date":"2024-10-19T21:55:53","date_gmt":"2024-10-19T21:55:53","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-21068-12008\/"},"modified":"2024-10-25T20:11:59","modified_gmt":"2024-10-25T20:11:59","slug":"bs-en-iso-21068-12008","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-21068-12008\/","title":{"rendered":"BS EN ISO 21068-1:2008"},"content":{"rendered":"

This part of ISO 21068 gives definitions and specifies techniques for the preparation of samples for the chemical analysis of silicon-carbide-containing raw materials and refractory products including:<\/p>\n

    \n
  1. \n

    graphite brick containing silicon carbide;<\/p>\n<\/li>\n

  2. \n

    silicon carbide brick (includes the bricks containing silicon nitride);<\/p>\n<\/li>\n

  3. \n

    refractories containing carbon and\/or silicon carbide mixed with clay;<\/p>\n<\/li>\n

  4. \n

    refractories containing carbon and\/or silicon carbide mixed with silica (and fused silica);<\/p>\n<\/li>\n

  5. \n

    refractories containing carbon and\/or silicon carbide mixed with high alumina material;<\/p>\n<\/li>\n

  6. \n

    refractories containing carbon and\/or silicon carbide mixed with magnesia (and dolomite);<\/p>\n<\/li>\n

  7. \n

    refractories containing carbon and\/or silicon carbide mixed with chrome mineral or magnesia-chrome materials;<\/p>\n<\/li>\n

  8. \n

    refractories containing carbon and\/or silicon carbide except those described in a) to g) above.<\/p>\n<\/li>\n<\/ol>\n

    The items of chemical analysis described in ISO 21068, Parts 1 to 3 are as follows:<\/p>\n

      \n
    1. \n

      loss on drying (LOD);<\/p>\n<\/li>\n

    2. \n

      loss on ignition (LOI);<\/p>\n<\/li>\n

    3. \n

      total carbon, Ctotal<\/sub>;<\/p>\n<\/li>\n

    4. \n

      free carbon, Cfree<\/sub>;<\/p>\n<\/li>\n

    5. \n

      silicon carbide, SiC;<\/p>\n<\/li>\n

    6. \n

      free silicon (Sifree<\/sub>);<\/p>\n<\/li>\n

    7. \n

      free aluminium (Alfree<\/sub>);<\/p>\n<\/li>\n

    8. \n

      free magnesium (Mgfree<\/sub>);<\/p>\n<\/li>\n

    9. \n

      free iron (Fefree<\/sub>);<\/p>\n<\/li>\n

    10. \n

      silicon(IV) oxide (SiO2<\/sub>);<\/p>\n<\/li>\n

    11. \n

      aluminium oxide (Al2<\/sub>O3<\/sub>);<\/p>\n<\/li>\n

    12. \n

      iron(III) oxide (total iron oxide calculated as Fe2<\/sub>O3<\/sub>);<\/p>\n<\/li>\n

    13. \n

      titanium(IV) oxide (TiO2<\/sub>);<\/p>\n<\/li>\n

    14. \n

      calcium oxide (CaO);<\/p>\n<\/li>\n

    15. \n

      magnesium oxide (MgO);<\/p>\n<\/li>\n

    16. \n

      sodium oxide (Na2<\/sub>O);<\/p>\n<\/li>\n

    17. \n

      potassium oxide (K2<\/sub>O);<\/p>\n<\/li>\n

    18. \n

      chromium(III) oxide (Cr2<\/sub>O3<\/sub>);<\/p>\n<\/li>\n

    19. \n

      zirconium oxide (ZrO2<\/sub>);<\/p>\n<\/li>\n

    20. \n

      boron oxide (total boron calculated as B2<\/sub>O3<\/sub>);<\/p>\n<\/li>\n

    21. \n

      nitrogen;<\/p>\n<\/li>\n

    22. \n

      oxygen;<\/p>\n<\/li>\n

    23. \n

      nitrides (undifferentiated: Si3<\/sub>N4<\/sub>, AlN, BN, sialon, oxy-nitrides, etc.).<\/p>\n<\/li>\n<\/ol>\n

      The range of determination specified in this part of ISO 21068 is given in Table 1.<\/p>\n

      Table 1<\/b><\/p>\n

      Range of determination<\/b><\/p>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      9<\/td>\nScope <\/td>\n<\/tr>\n
      11<\/td>\nNormative references
      Terms and definitions <\/td>\n<\/tr>\n
      12<\/td>\nSampling and preparation of the test sample
      General
      Sample pretreatment
      General
      Crushing <\/td>\n<\/tr>\n
      13<\/td>\nDrying
      Weighing (only general procedure)
      Preliminary analyses <\/td>\n<\/tr>\n
      14<\/td>\nExpression of results
      Test report <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Chemical analysis of silicon-carbide-containing raw materials and refractory products – General information and sample preparation<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2008<\/td>\n18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":317720,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-317714","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/317714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/317720"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=317714"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=317714"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=317714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}