{"id":2981,"date":"2021-01-21T09:13:50","date_gmt":"2021-01-21T08:13:50","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=2981"},"modified":"2025-09-29T10:24:40","modified_gmt":"2025-09-29T08:24:40","slug":"esferas-de-nitreto-de-silicio-si3n4","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/pt-pt\/produtos\/esferas-de-ceramica\/esferas-de-nitreto-de-silicio-si3n4\/","title":{"rendered":"Esferas de nitreto de sil\u00edcio Si3N4"},"content":{"rendered":"<p><!-- PT (usar \u00ab Esferas \u00bb) --><\/p>\n<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Ball_%28bearing%29?utm_source=chatgpt.com\">Esferas de nitreto de sil\u00edcio (Si\u2083N\u2084) \u2013 componentes de precis\u00e3o de alto desempenho<\/a><\/h2>\n<p>As Esferas de nitreto de sil\u00edcio (Si\u2083N\u2084) s\u00e3o componentes cer\u00e2micos avan\u00e7ados, reconhecidos pela dureza excecional, baixa densidade e not\u00e1vel resist\u00eancia t\u00e9rmica e ao desgaste. Estas caracter\u00edsticas tornam-nas ideais para aplica\u00e7\u00f5es exigentes na aeron\u00e1utica, em rolamentos h\u00edbridos e totalmente cer\u00e2micos e em sistemas rotativos de alta velocidade.<\/p>\n<h3>\ud83d\udd27 Especifica\u00e7\u00f5es t\u00e9cnicas principais<\/h3>\n<ul>\n<li><strong>Densidade<\/strong>: ~3,2\u20133,3 g\/cm\u00b3 (~40% do a\u00e7o)<\/li>\n<li><strong>Dureza<\/strong>: &gt;2000 Knoop (aprox. 15 GPa Vickers)<\/li>\n<li><strong>Resist\u00eancia \u00e0 flex\u00e3o<\/strong>: ~800\u20131000 MPa<\/li>\n<li><strong>Resist\u00eancia \u00e0 compress\u00e3o<\/strong>: ~2500\u20133000 MPa<\/li>\n<li><strong>M\u00f3dulo el\u00e1stico<\/strong>: ~310\u2013320 GPa<\/li>\n<li><strong>Tenacidade \u00e0 fratura (K\u2081c)<\/strong>: ~6 MPa\u00b7m\u2070\u00b7\u2075<\/li>\n<li><strong>Condutividade t\u00e9rmica<\/strong>: ~28\u201330 W\/(m\u00b7K)<\/li>\n<li><strong>Coeficiente de dilata\u00e7\u00e3o t\u00e9rmica (CTE)<\/strong>: ~3\u00d710\u207b\u2076 \/K<\/li>\n<li><strong>Resistividade el\u00e9trica<\/strong>: &gt;10\u00b9\u00b2 \u03a9\u00b7cm (isolante el\u00e9trico)<\/li>\n<li><strong>Temperatura de opera\u00e7\u00e3o<\/strong>: at\u00e9 ~1100\u20131200 \u00b0C<\/li>\n<li><strong>Classes<\/strong>: ISO \/ ABMA G1\u2013G60<\/li>\n<li><strong>Intervalo de di\u00e2metros<\/strong>: 0,5 mm \u2013 50 mm<\/li>\n<\/ul>\n<h3>\u2705 Vantagens<\/h3>\n<ul>\n<li><strong>Baixa densidade &amp; menor for\u00e7a centr\u00edfuga<\/strong> \u2013 Mais leves que o a\u00e7o, permitem maiores velocidades e menor perda de energia.<\/li>\n<li><strong>Dureza excecional &amp; resist\u00eancia ao desgaste<\/strong> \u2013 Garante longa vida \u00fatil em condi\u00e7\u00f5es severas.<\/li>\n<li><strong>Alta estabilidade t\u00e9rmica &amp; baixa expans\u00e3o<\/strong> \u2013 Mant\u00e9m a integridade sob varia\u00e7\u00f5es t\u00e9rmicas extremas.<\/li>\n<li><strong>Isolamento el\u00e9trico &amp; n\u00e3o magn\u00e9ticas<\/strong> \u2013 Seguras perto de motores, sensores e campos magn\u00e9ticos.<\/li>\n<li><strong>Elevada tenacidade \u00e0 fratura<\/strong> \u2013 Excelente resist\u00eancia a choques mec\u00e2nicos.<\/li>\n<li><strong>Vida \u00fatil prolongada<\/strong> \u2013 Menor atrito reduz lubrifica\u00e7\u00e3o e manuten\u00e7\u00e3o.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Aplica\u00e7\u00f5es das Esferas de nitreto de sil\u00edcio<\/h3>\n<p>As Esferas Si\u2083N\u2084 s\u00e3o amplamente utilizadas em aplica\u00e7\u00f5es de alto desempenho, incluindo:<\/p>\n<ul>\n<li><strong>Rolamentos h\u00edbridos e totalmente cer\u00e2micos<\/strong> \u2013 Para plataformas rotativas de alta velocidade e baixo atrito.<\/li>\n<li><strong>Motores &amp; turbinas aeroespaciais<\/strong> \u2013 Comprovadas em sistemas cr\u00edticos de propuls\u00e3o e controlo.<\/li>\n<li><strong>Ve\u00edculos el\u00e9tricos e motores<\/strong> \u2013 Proporcionam isolamento e durabilidade em sistemas de tra\u00e7\u00e3o.<\/li>\n<li><strong>Geradores de turbinas e\u00f3licas<\/strong> \u2013 Fiabilidade a longo prazo sob cargas din\u00e2micas elevadas.<\/li>\n<li><strong>Equipamentos semicondutores e m\u00e9dicos<\/strong> \u2013 Propriedades diel\u00e9tricas n\u00e3o magn\u00e9ticas para sistemas sens\u00edveis.<\/li>\n<li><strong>Ferramentas industriais &amp; m\u00e1quinas de alta temperatura<\/strong> \u2013 Resistentes ao calor, qu\u00edmicos e desgaste.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Classes &amp; tamanhos dispon\u00edveis<\/h3>\n<p>As Esferas de nitreto de sil\u00edcio est\u00e3o dispon\u00edveis em v\u00e1rios graus de precis\u00e3o e tamanhos:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\"><strong>Classes<\/strong>: G1, G5, G10, at\u00e9 G60<\/a><\/li>\n<li><strong>Intervalo de di\u00e2metros<\/strong>: 0,5 mm \u2013 50 mm<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Esferas de nitreto de sil\u00edcio (Si\u2083N\u2084) \u2013 componentes de precis\u00e3o de alto desempenho As Esferas de nitreto de sil\u00edcio (Si\u2083N\u2084) s\u00e3o componentes cer\u00e2micos avan\u00e7ados, reconhecidos pela dureza excecional, baixa densidade e not\u00e1vel resist\u00eancia t\u00e9rmica e ao desgaste. Estas caracter\u00edsticas tornam-nas ideais para aplica\u00e7\u00f5es exigentes na aeron\u00e1utica, em rolamentos h\u00edbridos e totalmente cer\u00e2micos e em [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8944,"parent":2979,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2981","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Esferas de nitreto de sil\u00edcio (Si3N4) \u2013 dureza e leveza<\/title>\n<meta name=\"description\" content=\"Esferas de nitreto de sil\u00edcio combinam alta dureza, baixo peso e resist\u00eancia ao desgaste para aplica\u00e7\u00f5es t\u00e9cnicas e industriais.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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