{"id":718,"date":"2026-10-28T21:32:22","date_gmt":"2026-10-28T13:32:22","guid":{"rendered":"https:\/\/siliconcarbide.net\/?p=718"},"modified":"2026-10-28T21:32:22","modified_gmt":"2026-10-28T13:32:22","slug":"%e3%82%ac%e3%83%a9%e3%82%b9%e7%82%89%e3%81%ab%e3%81%8a%e3%81%84%e3%81%a6%e3%80%81%e7%86%b1%e9%9b%bb%e5%af%be%e4%bf%9d%e8%ad%b7%e7%ae%a1%e3%81%8c%e6%97%a9%e6%9c%9f%e3%81%ab%e7%a0%b4%e6%90%8d%e3%81%97","status":"publish","type":"post","link":"https:\/\/siliconcarbide.net\/ja\/why-thermocouple-protection-tubes-fail-early-or-drift-in-glass-furnaces\/","title":{"rendered":"\u30ac\u30e9\u30b9\u7089\u306b\u304a\u3044\u3066\u3001\u71b1\u96fb\u5bfe\u4fdd\u8b77\u7ba1\u304c\u65e9\u671f\u306b\u7834\u640d\u3057\u305f\u308a\u3001\u30c9\u30ea\u30d5\u30c8\u304c\u751f\u3058\u305f\u308a\u3059\u308b\u7406\u7531"},"content":{"rendered":"<p dir=\"auto\"><strong>\u30ac\u30e9\u30b9\u7089\u306b\u304a\u3044\u3066\u3001\u71b1\u96fb\u5bfe\u4fdd\u8b77\u7ba1\u304c\u65e9\u671f\u306b\u7834\u640d\u3057\u305f\u308a\u3001\u30c9\u30ea\u30d5\u30c8\u304c\u751f\u3058\u305f\u308a\u3059\u308b\u7406\u7531<\/strong><\/p>\n<p dir=\"auto\">12\u5e74\u9593\u306b\u308f\u305f\u308a\u30ac\u30e9\u30b9\u6eb6\u878d\u4f5c\u696d\u3092\u652f\u63f4\u3057\u3066\u304d\u305f\u4e2d\u3067\u3001\u7e70\u308a\u8fd4\u3057\u767a\u751f\u3059\u308b\u554f\u984c\u3068\u3057\u3066\u3001\u71b1\u96fb\u5bfe\u306e\u6e2c\u5b9a\u5024\u304c\u5f90\u3005\u306b\u30c9\u30ea\u30d5\u30c8\u3057\u305f\u308a\u3001\u4e88\u5b9a\u3055\u308c\u305f\u70b9\u691c\u6642\u671f\u3088\u308a\u3082\u304b\u306a\u308a\u524d\u306b\u4fdd\u8b77\u7ba1\u304c\u7834\u640d\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u7089\u5185\u6e29\u5ea6\u306f\u5b89\u5b9a\u3057\u3066\u304a\u308a\u3001\u71b1\u96fb\u5bfe\u306e\u7d20\u5b50\u3082\u9069\u5207\u306a\u30bf\u30a4\u30d7\u3067\u3042\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u8868\u793a\u6e29\u5ea6\u304c\u6570\u5341\u5ea6\u305a\u308c\u305f\u308a\u3001\u30ac\u30e9\u30b9\u30e9\u30a4\u30f3\u3084\u71c3\u713c\u5ba4\u5185\u3067\u4fdd\u8b77\u7ba1\u306b\u3072\u3073\u5272\u308c\u3084\u8584\u5316\u304c\u751f\u3058\u305f\u308a\u3057\u307e\u3059\u3002 \u305d\u306e\u6839\u672c\u7684\u306a\u8981\u56e0\u306f\u3001\u30a2\u30eb\u30ab\u30ea\u84b8\u6c17\u3084\u6eb6\u878d\u30ac\u30e9\u30b9\u306b\u3088\u308b\u8150\u98df\u901f\u5ea6\u3068\u3001\u4fdd\u8b77\u7ba1\u6750\u6599\u306e\u71b1\u4f1d\u5c0e\u7387\u306b\u3042\u308a\u3001\u3053\u308c\u30892\u3064\u306e\u8981\u56e0\u304c\u76f8\u307e\u3063\u3066\u3001\u8010\u7528\u5e74\u6570\u3068\u6e29\u5ea6\u5fdc\u7b54\u306e\u9045\u308c\u3092\u6c7a\u5b9a\u3065\u3051\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p dir=\"auto\">\u30a2\u30eb\u30df\u30ca\u7ba1\uff08\u901a\u5e38\u306f99 % Al\u2082O\u2083\uff09\u306f\u3001\u305d\u306e\u5316\u5b66\u7684\u5b89\u5b9a\u6027\u306b\u3088\u308a\u3001\u6eb6\u878d\u30ac\u30e9\u30b9\u3084\u30a2\u30eb\u30ab\u30ea\u84b8\u6c17\u306b\u3088\u308b\u8150\u98df\u306b\u5bfe\u3057\u3066\u304b\u306a\u308a\u9ad8\u3044\u8010\u6027\u3092\u793a\u3057\u307e\u3059\u304c\u3001\u71b1\u4f1d\u5c0e\u7387\u306f\u4e2d\u7a0b\u5ea6\uff08\u7d0425\uff5e30 W\/m\u00b7K\uff09\u3067\u3042\u308a\u3001\u8010\u71b1\u885d\u6483\u6027\u3082\u9650\u3089\u308c\u3066\u3044\u307e\u3059\u3002 \u70ad\u5316\u30b1\u30a4\u7d20\u7ba1\u3001\u7279\u306b\u713c\u7d50\u54c1\u3084\u518d\u7d50\u6676\u54c1\u306f\u3001\u3088\u308a\u9ad8\u3044\u71b1\u4f1d\u5c0e\u7387\uff08\u591a\u304f\u306e\u5834\u540830\uff5e50 W\/m\u00b7K\u4ee5\u4e0a\uff09\u3068\u512a\u308c\u305f\u8010\u71b1\u885d\u6483\u6027\u3092\u5099\u3048\u3066\u304a\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u5fdc\u7b54\u306e\u9045\u308c\u304c\u8efd\u6e1b\u3055\u308c\u308b\u304c\u3001\u4e00\u90e8\u306e\u30b0\u30ec\u30fc\u30c9\u3067\u306f\u3001\u5f37\u30a2\u30eb\u30ab\u30ea\u6027\u96f0\u56f2\u6c17\u4e0b\u3067\u8868\u9762\u306e\u9178\u5316\u3084\u53cd\u5fdc\u304c\u751f\u3058\u308b\u3053\u3068\u304c\u3042\u308b\u3002 \u8150\u98df\u306f\u3001\u30a2\u30eb\u30ab\u30ea\u9178\u5316\u7269\u304c\u7ba1\u306e\u8868\u9762\u3068\u53cd\u5fdc\u3057\u3066\u4f4e\u878d\u70b9\u306e\u5c64\u3092\u5f62\u6210\u3057\u3001\u305d\u308c\u304c\u5f90\u3005\u306b\u6eb6\u89e3\u307e\u305f\u306f\u5265\u96e2\u3059\u308b\u3053\u3068\u3067\u9032\u884c\u3057\u307e\u3059\u3002\u6d78\u6f2c\u90e8\u5206\u3067\u306f\u8150\u98df\u304c\u901f\u304f\u9032\u884c\u3057\u3001\u30af\u30e9\u30a6\u30f3\u90e8\u3084\u4e0a\u90e8\u69cb\u9020\u3067\u306f\u3001\u6c34\u84b8\u6c17\u306e\u51dd\u7e2e\u306b\u3088\u3063\u3066\u8150\u98df\u304c\u4fc3\u9032\u3055\u308c\u307e\u3059\u3002 \u58c1\u539a\u306e\u6e1b\u5c11\u306f\u6a5f\u68b0\u7684\u7834\u640d\u306e\u30ea\u30b9\u30af\u3092\u9ad8\u3081\u308b\u4e00\u65b9\u3001\u58c1\u304c\u539a\u3044\u5834\u5408\u3084\u71b1\u4f1d\u5c0e\u7387\u304c\u4f4e\u3044\u5834\u5408\u306f\u3001\u6e2c\u5b9a\u306e\u6642\u5b9a\u6570\u304c\u5897\u52a0\u3059\u308b\u3002.<\/p>\n<p dir=\"auto\">1450\uff5e1500 \u00b0C\u3067\u7a3c\u50cd\u3059\u308b\u30b3\u30f3\u30c6\u30ca\u5f0f\u30ac\u30e9\u30b9\u7089\u306b\u304a\u3044\u3066\u30012\u672c\u306e\u9589\u7aef\u578b\u4fdd\u8b77\u7ba1\u3092\u7089\u51a0\u90e8\u306b\u4e26\u3079\u3066\u8a2d\u7f6e\u3057\u300190\u65e5\u9593\u8a66\u9a13\u3092\u884c\u3063\u305f\u3002 \u30a2\u30eb\u30df\u30ca\u7ba1\uff08\u5f53\u521d\u306e\u8089\u539a 6 mm\uff09\u306f\u3001\u6700\u3082\u9ad8\u6e29\u3068\u306a\u308b\u9818\u57df\u3067\u5e73\u5747 1.2 mm \u306e\u8089\u539a\u6e1b\u5c11\u304c\u898b\u3089\u308c\u3001\u30d0\u30fc\u30ca\u30fc\u306e\u8ca0\u8377\u3092\u5909\u66f4\u3057\u305f\u969b\u306e\u6e2c\u5b9a\u3055\u308c\u305f\u6642\u5b9a\u6570\u306f\u7d04 45 \u79d2\u3067\u3042\u3063\u305f\u3002 \u713c\u7d50\u70ad\u5316\u30b1\u30a4\u7d20\u7ba1\uff08\u5f53\u521d\u306e\u8089\u539a 5 mm\uff09\u306f\u3001\u540c\u3058\u6761\u4ef6\u4e0b\u3067 0.7 mm \u306e\u8584\u5316\u304c\u898b\u3089\u308c\u3001\u6642\u9593\u5b9a\u6570\u306f\u7d04 28 \u79d2\u3067\u3057\u305f\u3002\u3044\u305a\u308c\u306e\u7ba1\u306b\u3082\u8cab\u901a\u4e80\u88c2\u306f\u767a\u751f\u3057\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u53d6\u308a\u5916\u3057\u5f8c\u3001\u30a2\u30eb\u30df\u30ca\u7ba1\u306e\u8868\u9762\u306b\u306f\u30ca\u30c8\u30ea\u30a6\u30e0\u3068\u30ab\u30ea\u30a6\u30e0\u3092\u542b\u3080\u8584\u3044\u53cd\u5fdc\u5c64\u304c\u5f62\u6210\u3055\u308c\u3066\u3044\u305f\u306e\u306b\u5bfe\u3057\u3001\u70ad\u5316\u30b1\u30a4\u7d20\u7ba1\u306e\u8868\u9762\u306b\u306f\u3001\u30a2\u30eb\u30ab\u30ea\u306e\u6d78\u900f\u304c\u9650\u5b9a\u7684\u306a\u8584\u3044\u30b7\u30ea\u30ab\u30b9\u30b1\u30fc\u30eb\u304c\u5f62\u6210\u3055\u308c\u3066\u3044\u305f\u3002\u70ad\u5316\u30b1\u30a4\u7d20\u7ba1\u304b\u3089\u306e\u6e29\u5ea6\u6e2c\u5b9a\u5024\u306f\u30d7\u30ed\u30bb\u30b9\u306e\u5909\u5316\u3092\u3088\u308a\u5fe0\u5b9f\u306b\u8ffd\u8de1\u3057\u3066\u3044\u305f\u306e\u306b\u5bfe\u3057\u3001\u30a2\u30eb\u30df\u30ca\u7ba1\u306f\u9045\u308c\u304c\u751f\u3058\u3066\u3044\u305f\u305f\u3081\u3001\u3088\u308a\u5927\u304d\u306a\u5236\u5fa1\u30c7\u30c3\u30c9\u30d0\u30f3\u30c9\u304c\u5fc5\u8981\u3068\u306a\u3063\u305f\u3002.<\/p>\n<p dir=\"auto\">\u3057\u305f\u304c\u3063\u3066\u3001\u4fdd\u8b77\u7ba1\u306e\u9078\u5b9a\u306b\u3042\u305f\u3063\u3066\u306f\u3001\u8a2d\u7f6e\u5834\u6240\u306b\u5fdc\u3058\u3066\u8010\u98df\u6027\u3068\u71b1\u4f1d\u5c0e\u7387\u3001\u304a\u3088\u3073\u8089\u539a\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u71b1\u96fb\u5bfe\u4fdd\u8b77\u7ba1\u306e\u30ac\u30e9\u30b9\u7089\u5185\u3067\u306e\u8010\u98df\u6027\u7ba1\u7406\u306b\u304a\u3044\u3066\u3001\u5b9f\u7528\u4e0a\u306e\u5909\u6570\u3068\u306a\u308b\u306e\u306f\u3001\u6750\u6599\u306e\u7d14\u5ea6\u3001\u5bc6\u5ea6\u3001\u304a\u3088\u3073\u30a2\u30eb\u30ab\u30ea\u84b8\u6c17\u3078\u306e\u66dd\u9732\u3068\u30ac\u30e9\u30b9\u3068\u306e\u76f4\u63a5\u63a5\u89e6\u306e\u6709\u7121\u3067\u3059\u3002 \u30a2\u30eb\u30df\u30ca\u88fd\u3068SiC\u88fd\u306e\u71b1\u96fb\u5bfe\u30b7\u30fc\u30b9\u30ac\u30e9\u30b9\u306e\u6027\u80fd\u6bd4\u8f03\u306f\u3001\u5b9f\u9a13\u5ba4\u3067\u306e\u8150\u98df\u30c7\u30fc\u30bf\u306e\u307f\u3067\u306f\u306a\u304f\u3001\u540c\u4e00\u306e\u7089\u6761\u4ef6\u4e0b\u3067\u306e\u8089\u539a\u6e1b\u5c11\u91cf\u3068\u5fdc\u7b54\u6642\u9593\u3092\u6e2c\u5b9a\u3059\u308b\u3053\u3068\u3067\u78ba\u8a8d\u3055\u308c\u308b\u3002 \u6eb6\u878d\u30ac\u30e9\u30b9\u4e2d\u306b\u304a\u3051\u308b\u71b1\u96fb\u5bfe\u30b7\u30fc\u30b9\u306e\u5bff\u547d\u306f\u3001\u305d\u306e\u6750\u6599\u304c\u52d5\u4f5c\u6e29\u5ea6\u306b\u304a\u3044\u3066\u5316\u5b66\u7684\u4fb5\u98df\u3068\u71b1\u885d\u6483\u306e\u4e21\u65b9\u306b\u8010\u3048\u308b\u3053\u3068\u3067\u5ef6\u9577\u3055\u308c\u307e\u3059\u3002\u6e2c\u5b9a\u5024\u306b\u30c9\u30ea\u30d5\u30c8\u304c\u751f\u3058\u305f\u308a\u3001\u30b7\u30fc\u30b9\u304c\u65e9\u671f\u306b\u7834\u640d\u3057\u305f\u308a\u3057\u305f\u5834\u5408\u3001\u305d\u306e\u88cf\u4ed8\u3051\u3068\u306a\u308b\u8a3c\u62e0\u306f\u3001\u8089\u539a\u306e\u6e2c\u5b9a\u5024\u3068\u3001\u65e2\u77e5\u306e\u6e29\u5ea6\u5909\u5316\u4e2d\u306b\u89b3\u5bdf\u3055\u308c\u308b\u6642\u9593\u9045\u308c\u3067\u3059\u3002 \u30af\u30e9\u30a6\u30f3\u6bd4\u8f03\u306b\u304a\u3044\u3066\u3001\u8584\u5316\u304c1.2 mm\u304b\u30890.7 mm\u3078\u3001\u6642\u5b9a\u6570\u304c45\u79d2\u304b\u308928\u79d2\u3078\u3068\u6e1b\u5c11\u3057\u305f\u3053\u3068\u304c\u793a\u3059\u3088\u3046\u306b\u3001\u5c0e\u96fb\u7387\u304c\u9ad8\u304f\u3001\u5341\u5206\u306a\u8010\u98df\u6027\u3092\u5099\u3048\u305f\u30c1\u30e5\u30fc\u30d6\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u30ac\u30e9\u30b9\u7089\u3067\u306e\u4f7f\u7528\u306b\u304a\u3051\u308b\u6e2c\u5b9a\u5fdc\u7b54\u6027\u3068\u8010\u7528\u5e74\u6570\u306e\u4e21\u65b9\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>Why Thermocouple Protection Tubes Fail Early or Drift in Glass Furnaces After twelve years supporting glass melting operations, a repeated issue is that thermocouple readings gradually drift or the protection tube fails well before the scheduled campaign. The furnace temperature is stable and the thermocouple element is the correct type, yet the indicated temperature shifts by tens of degrees or the tube cracks or thins at the glass line or in the combustion space. The underlying factors are the rate of corrosion by alkali vapors or molten glass and the thermal conductivity of the tube material, which together determine both service life and the lag in temperature response. Alumina tubes&hellip;&nbsp;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[30],"tags":[],"class_list":["post-718","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/posts\/718","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/comments?post=718"}],"version-history":[{"count":2,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/posts\/718\/revisions"}],"predecessor-version":[{"id":720,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/posts\/718\/revisions\/720"}],"wp:attachment":[{"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/media?parent=718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/categories?post=718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbide.net\/ja\/wp-json\/wp\/v2\/tags?post=718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}