{"id":12485,"date":"2025-10-14T21:18:33","date_gmt":"2025-10-14T19:18:33","guid":{"rendered":"https:\/\/sxe-consulting.com\/?page_id=12485"},"modified":"2025-10-14T21:18:33","modified_gmt":"2025-10-14T19:18:33","slug":"sintered-alumina-definition","status":"publish","type":"page","link":"https:\/\/sxe-consulting.com\/en\/glossaire-industriel\/sintered-alumina-definition\/","title":{"rendered":"Sintered Alumina - Alumin\u00e9 Frit\u00e9e"},"content":{"rendered":"

L\u2019Sintered alumina<\/strong> is a form of technical ceramic composed mainly of aluminum oxide (Al2O3). It is characterized by a very high density<\/strong> and a fine-grained microstructure<\/strong>, obtained by a thermal consolidation process without passing through the total liquid phase.<\/p>\n

<\/p>\n

In-depth definition :<\/strong> Visit Sintering<\/strong> is a\u2019Industrialisation<\/strong> where a compacted powder (alumina powder) is heated to a high temperature, but below its melting point<\/strong> (generally between 1400\u2218C and 1700\u2218C). Under the effect of heat, powder particles bind together by atomic diffusion, pores reduce and the material consolidates into a solid, dense and cohesive mass. Additives (called sintering aids) are often used to control grain size and facilitate densification.<\/p>\n

Key Properties and Applications for Industrial Performance<\/strong><\/h3>\n

Sintered alumina is appreciated in the Industrial Engineering<\/strong> for its unique combination of properties:<\/p>\n

    \n
  1. Excellent wear and abrasion resistance:<\/strong> It is harder than most metals and is used for parts subject to intense friction.<\/li>\n
  2. High mechanical strength (hardness and rigidity) :<\/strong> It maintains its strength even at high temperatures, superior to that of steel in these conditions.<\/li>\n
  3. Chemical inertia :<\/strong> It resists corrosion by many acids and alkalis.<\/li>\n
  4. Superior dielectric properties :<\/strong> It is an excellent electrical and thermal insulator.<\/li>\n
  5. Microstructure Fine :<\/strong> Provides an excellent surface finish, essential for precision parts.<\/li>\n<\/ol>\n\n\n\n\n\n\n\n
    Field of application<\/th>\nExample<\/th>\nKey role<\/th>\n<\/tr>\n<\/thead>\n
    Precision Mechanics<\/strong><\/td>\nSeals, nozzles, wire guides<\/td>\nWear resistance, dimensional accuracy.<\/td>\n<\/tr>\n
    Electronics<\/strong><\/td>\nIntegrated circuit substrates, high-voltage insulators<\/td>\nElectrical insulation, heat dissipation.<\/td>\n<\/tr>\n
    Medical<\/strong><\/td>\nHip prostheses (femoral heads), surgical instruments<\/td>\nBiocompatibility, hardness, chemical inertness.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Sintered alumina is the preferred choice when the application calls for technical ceramics from high performance, dense and tightly toleranced<\/strong>, often in the glass and\/or steel industry.<\/p>\n

    <\/p>\n

    <\/p>","protected":false},"excerpt":{"rendered":"

    L’Alumine Fritt\u00e9e est une forme de c\u00e9ramique technique compos\u00e9e principalement d’oxyde d’aluminium (Al2O3). Elle est caract\u00e9ris\u00e9e par une tr\u00e8s haute densit\u00e9 et une microstructure \u00e0 grains fins, obtenues par un processus de consolidation thermique sans passer par la phase liquide totale.<\/p>","protected":false},"author":1,"featured_media":0,"parent":12324,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"definition":[99],"class_list":["post-12485","page","type-page","status-publish","hentry","definition-definition"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/comments?post=12485"}],"version-history":[{"count":0,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12485\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/pages\/12324"}],"wp:attachment":[{"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/media?parent=12485"}],"wp:term":[{"taxonomy":"definition","embeddable":true,"href":"https:\/\/sxe-consulting.com\/en\/wp-json\/wp\/v2\/definition?post=12485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}