{"id":2760,"date":"2025-12-16T19:31:16","date_gmt":"2025-12-17T02:31:16","guid":{"rendered":"https:\/\/wfabrasive.com\/?p=2760"},"modified":"2025-12-17T00:38:21","modified_gmt":"2025-12-17T07:38:21","slug":"corundum-white-properties-uses","status":"publish","type":"post","link":"https:\/\/wfabrasive.com\/ja\/corundum-white-properties-uses\/","title":{"rendered":"\u30b3\u30e9\u30f3\u30c0\u30e0\u30db\u30ef\u30a4\u30c8\uff1a\u7279\u6027\u3001\u7523\u696d\u7528\u9014\u3001\u304a\u3088\u3073\u8cfc\u5165\u8005\u306e\u9078\u629e\u30ac\u30a4\u30c9"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"what-is-corundum-white\" data-block-type=\"core\">What Is Corundum White?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Corundum white<\/strong>, commonly referred to as <strong>white fused alumina (WFA)<\/strong>, is a high-purity synthetic abrasive produced by fusing refined alumina in an electric arc furnace at temperatures exceeding 2000 \u00b0C.<br>The material solidifies into a <strong>polycrystalline \u03b1-aluminum oxide (\u03b1-Al\u2082O\u2083)<\/strong> structure with extremely low iron content, making it suitable for precision surface processing.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\" data-block-type=\"core\">\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Featured Snippet Definition<\/strong><br><em>Corundum white is a high-purity, polycrystalline aluminum oxide abrasive characterized by high hardness, chemical stability, and low contamination risk, widely used in grinding, blasting, and refractory applications.<\/em><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chemical-and-physical-characteristics\" data-block-type=\"core\">Chemical and Physical Characteristics<\/h2>\n\n\n\n<figure class=\"wp-block-table\" data-block-type=\"core\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4e0d\u52d5\u7523<\/th><th>Typical Range<\/th><\/tr><\/thead><tbody><tr><td>Main phase<\/td><td>\u03b1-Al\u2082O\u2083 (polycrystalline)<\/td><\/tr><tr><td>Al\u2082O\u2083 content<\/td><td>99.2\u201399.6% (grade-dependent)<\/td><\/tr><tr><td>Fe\u2082O\u2083 content<\/td><td>\u2264 0.10%<\/td><\/tr><tr><td>\u30e2\u30a2\u30b9\u306e\u786c\u3055<\/td><td>~9<\/td><\/tr><tr><td>\u878d\u70b9<\/td><td>~2050 \u00b0C<\/td><\/tr><tr><td>Electrical behavior<\/td><td>Insulating<\/td><\/tr><tr><td>Optical transparency<\/td><td>\u274c Not transparent<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Accuracy clarification:<\/strong><br>Only <strong>single-crystal sapphire<\/strong> exhibits optical transparency. White corundum is a fused, polycrystalline abrasive and should not be described as optically transparent or optical-grade.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-corundum-white-is-manufactured\" data-block-type=\"core\">How Corundum White Is Manufactured<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Industrial production of corundum white generally includes:<\/p>\n\n\n\n<ol class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Selection of high-purity alumina feedstock<\/li>\n\n\n\n<li data-block-type=\"core\">Electric arc furnace fusion<\/li>\n\n\n\n<li data-block-type=\"core\">Controlled cooling and solidification<\/li>\n\n\n\n<li data-block-type=\"core\">Crushing, milling, and particle classification<\/li>\n\n\n\n<li data-block-type=\"core\">Magnetic separation and final grading (FEPA \/ ANSI)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">A full overview of available forms and specifications is provided in the internal pillar article:<br>\ud83d\udc49 <strong><a href=\"https:\/\/wfabrasive.com\/ja\/white-corundum-product-highlight\/\">white corundum product highlights<\/a><\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"industrial-applications-of-corundum-white\" data-block-type=\"core\">Industrial Applications of Corundum White<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"precision-grinding-and-polishing\" data-block-type=\"core\">Precision Grinding and Polishing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Thanks to its friable crystal structure, corundum white continuously exposes fresh cutting edges during use. This makes it suitable for:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Tool and cutter grinding<\/li>\n\n\n\n<li data-block-type=\"core\">Bearing and mold finishing<\/li>\n\n\n\n<li data-block-type=\"core\">Hardened steel surface refinement<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Common abrasive form:<br>\ud83d\udd17 <em><a href=\"https:\/\/wfabrasive.com\/ja\/product\/\">\u30db\u30ef\u30a4\u30c8\u30d5\u30a7\u30fc\u30b8\u30c9\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u30b0\u30ea\u30c3\u30c8<\/a><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h3 class=\"wp-block-heading\" id=\"sandblasting-and-surface-preparation\" data-block-type=\"core\">Sandblasting and Surface Preparation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Low iron content reduces the risk of surface contamination, particularly on corrosion-sensitive metals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Typical uses include:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Stainless steel blasting<\/li>\n\n\n\n<li data-block-type=\"core\">Aerospace component preparation<\/li>\n\n\n\n<li data-block-type=\"core\">Equipment surface cleaning<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Recommended material:<br>\ud83d\udd17 <em><a href=\"https:\/\/wfabrasive.com\/ja\/product\/white-fused-alumina-grits-14\/\">White Corundum for Sandblasting<\/a><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h3 class=\"wp-block-heading\" id=\"refractory-and-high-temperature-applications\" data-block-type=\"core\">Refractory and High-Temperature Applications<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Fine white corundum powders are frequently used as:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Refractory fillers<\/li>\n\n\n\n<li data-block-type=\"core\">Castable aggregates<\/li>\n\n\n\n<li data-block-type=\"core\">Kiln furniture raw materials<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Relevant product type:<br>\ud83d\udd17 <em><a href=\"https:\/\/wfabrasive.com\/ja\/product\/low-sodium-wfa-micro-powder-8000-na%e2%82%82o-%e2%89%a4-0-10\/\">\u30db\u30ef\u30a4\u30c8\u30d5\u30a7\u30fc\u30b8\u30c9\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u30d1\u30a6\u30c0\u30fc<\/a><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"comparative-data-white-corundum-vs-other-abrasives\" data-block-type=\"core\">Comparative Data: White Corundum vs Other Abrasives<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"chemical-purity-and-contamination-risk\" data-block-type=\"core\">Chemical Purity and Contamination Risk<\/h3>\n\n\n\n<figure class=\"wp-block-table\" data-block-type=\"core\"><table class=\"has-fixed-layout\"><thead><tr><th>Abrasive Material<\/th><th>Al\u2082O\u2083 (%)<\/th><th>Fe\u2082O\u2083 (%)<\/th><th>Contamination Risk<\/th><\/tr><\/thead><tbody><tr><td><strong>Corundum White<\/strong><\/td><td>99.2\u201399.6<\/td><td>\u22640.10<\/td><td>Very Low<\/td><\/tr><tr><td>\u30d6\u30e9\u30a6\u30f3\u878d\u5408\u30a2\u30eb\u30df\u30cb\u30a6\u30e0<\/td><td>95\u201397<\/td><td>0.3\u20131.0<\/td><td>\u4e2d\u7d1a<\/td><\/tr><tr><td>Calcined Alumina<\/td><td>\u226599.5<\/td><td>\u22640.05<\/td><td>Very Low<\/td><\/tr><tr><td>\u30b1\u30a4\u7d20\u70ad\u5316\u7269<\/td><td>\u226598 (SiC)<\/td><td>N\/A<\/td><td>Low<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Why it matters:<\/strong><br>Corundum white is selected not for appearance, but for <strong>chemical cleanliness and process stability<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h3 class=\"wp-block-heading\" id=\"cutting-behavior-and-wear-characteristics\" data-block-type=\"core\">Cutting Behavior and Wear Characteristics<\/h3>\n\n\n\n<figure class=\"wp-block-table\" data-block-type=\"core\"><table class=\"has-fixed-layout\"><thead><tr><th>Abrasive<\/th><th>Cutting Action<\/th><th>Friability<\/th><th>Heat Generation<\/th><\/tr><\/thead><tbody><tr><td><strong>White Corundum<\/strong><\/td><td>Medium\u2013High<\/td><td>\u9ad8\u3044<\/td><td>Low\u2013Medium<\/td><\/tr><tr><td>Brown Alumina<\/td><td>\u4e2d\u7d1a<\/td><td>Low<\/td><td>Medium\u2013High<\/td><\/tr><tr><td>\u30b1\u30a4\u7d20\u70ad\u5316\u7269<\/td><td>Very High<\/td><td>Very High<\/td><td>\u9ad8\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">This balance makes corundum white ideal where <strong>surface quality outweighs maximum material removal<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"application-suitability-matrix\" data-block-type=\"core\">Application Suitability Matrix<\/h2>\n\n\n\n<figure class=\"wp-block-table\" data-block-type=\"core\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7533\u8acb<\/th><th>White Corundum<\/th><th>Brown Alumina<\/th><th>\u30b1\u30a4\u7d20\u70ad\u5316\u7269<\/th><\/tr><\/thead><tbody><tr><td>\u7cbe\u5bc6\u7814\u524a<\/td><td>\u2705 Recommended<\/td><td>\u26a0\ufe0f Acceptable<\/td><td>\u274c Too aggressive<\/td><\/tr><tr><td>Stainless steel blasting<\/td><td>\u2705 Recommended<\/td><td>\u274c Rust risk<\/td><td>\u26a0\ufe0f Conditional<\/td><\/tr><tr><td>Refractory fillers<\/td><td>\u2705 Suitable<\/td><td>\u26a0\ufe0f Limited<\/td><td>\u274c Rare<\/td><\/tr><tr><td>Optical or biomedical implants<\/td><td>\u274c Not applicable<\/td><td>\u274c<\/td><td>\u274c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\"><strong>Trust note:<\/strong><br>White corundum is <strong>not<\/strong> a biomedical implant material and <strong>not<\/strong> an optical material. Its role in medical-related industries is limited to <strong>equipment and surface processing<\/strong>, not direct human use.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-select-a-corundum-white-supplier\" data-block-type=\"core\">How to Select a Corundum White Supplier<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">Professional buyers should evaluate suppliers based on:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Verified chemical composition reports<\/li>\n\n\n\n<li data-block-type=\"core\">\u5747\u4e00\u306a\u7c92\u5f84\u5206\u5e03<\/li>\n\n\n\n<li data-block-type=\"core\">Compliance with FEPA or ANSI standards<\/li>\n\n\n\n<li data-block-type=\"core\">Batch traceability and industrial experience<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">As a specialized <strong>manufacturer of white fused alumina<\/strong>, WF Abrasive supplies graded corundum white materials for grinding, blasting, and refractory applications across multiple industries.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\" id=\"buyer-summary\" data-block-type=\"core\">Buyer Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Corundum white is a <strong>high-purity alumina abrasive<\/strong>, not sapphire<\/li>\n\n\n\n<li data-block-type=\"core\">Its value lies in <strong>low contamination and stable cutting behavior<\/strong><\/li>\n\n\n\n<li data-block-type=\"core\">Correct grade and grain size selection directly affect performance<\/li>\n\n\n\n<li data-block-type=\"core\">Standards compliance is more important than nominal purity alone<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" data-block-type=\"core\">For specifications, grades, and industrial forms, refer to the detailed guide:<br>\ud83d\udc49 <strong><a href=\"https:\/\/wfabrasive.com\/ja\/white-corundum-product-highlight\/\">white corundum product highlights<\/a><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>What Is Corundum White? Corundum white, commonly referred to as white fused alumina (WFA), is a high-purity synthetic abrasive produced by fusing refined alumina in an electric arc furnace at temperatures exceeding 2000 \u00b0C.The material solidifies into a polycrystalline \u03b1-aluminum oxide (\u03b1-Al\u2082O\u2083) structure with extremely low iron content, making it suitable for precision surface processing. Featured Snippet DefinitionCorundum white is a high-purity, polycrystalline aluminum oxide abrasive characterized by high hardness, chemical stability, and low contamination risk, widely used in grinding, blasting, and refractory applications. Chemical and Physical Characteristics Property Typical Range Main phase \u03b1-Al\u2082O\u2083 (polycrystalline) Al\u2082O\u2083 content 99.2\u201399.6% (grade-dependent) Fe\u2082O\u2083 content \u2264 0.10% Mohs hardness ~9 Melting point ~2050 \u00b0C [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2693,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","content-type":"","footnotes":""},"categories":[116],"tags":[],"class_list":["post-2760","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"rttpg_featured_image_url":{"full":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-scaled.jpg",2560,1920,false],"landscape":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-scaled.jpg",2560,1920,false],"portraits":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-scaled.jpg",2560,1920,false],"thumbnail":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-150x150.jpg",150,150,true],"medium":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-300x225.jpg",300,225,true],"large":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-1024x768.jpg",1024,768,true],"1536x1536":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-1536x1152.jpg",1536,1152,true],"2048x2048":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-2048x1536.jpg",2048,1536,true],"trp-custom-language-flag":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-scaled.jpg",16,12,false],"woocommerce_archive_thumbnail":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-300x300.jpg",300,300,true],"woocommerce_thumbnail":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-300x300.jpg",300,300,true],"woocommerce_single":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-500x375.jpg",500,375,true],"woocommerce_gallery_thumbnail":["https:\/\/wfabrasive.com\/wp-content\/uploads\/2025\/12\/IMG_0923-100x100.jpg",100,100,true]},"rttpg_author":{"display_name":"xlabrasive@gmail.com","author_link":"https:\/\/wfabrasive.com\/ja\/author\/xlabrasivegmail-com\/"},"rttpg_comment":2,"rttpg_category":"<a href=\"https:\/\/wfabrasive.com\/ja\/category\/blog\/\" rel=\"category tag\">BLOG<\/a>","rttpg_excerpt":"What Is Corundum White? Corundum white, commonly referred to as white fused alumina (WFA), is a high-purity synthetic abrasive produced by fusing refined alumina in an electric arc furnace at temperatures exceeding 2000 \u00b0C.The material solidifies into a polycrystalline \u03b1-aluminum oxide (\u03b1-Al\u2082O\u2083) structure with extremely low iron content, making it suitable for precision surface processing.&hellip;","_links":{"self":[{"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/posts\/2760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/comments?post=2760"}],"version-history":[{"count":2,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/posts\/2760\/revisions"}],"predecessor-version":[{"id":2855,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/posts\/2760\/revisions\/2855"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/media\/2693"}],"wp:attachment":[{"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/media?parent=2760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/categories?post=2760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wfabrasive.com\/ja\/wp-json\/wp\/v2\/tags?post=2760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}