{"id":7067,"date":"2021-04-11T02:54:36","date_gmt":"2021-04-11T02:54:36","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=7067"},"modified":"2024-06-28T02:22:11","modified_gmt":"2024-06-28T02:22:11","slug":"aplicacao-de-alfa-alumina-em-novas-ceramicas-de-alumina","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/pt\/aplicacao-de-alfa-alumina-em-novas-ceramicas-de-alumina\/","title":{"rendered":"A aplica\u00e7\u00e3o de alfa-alumina em novas cer\u00e2micas de alumina"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"7067\" class=\"elementor elementor-7067\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2c6ae5b5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2c6ae5b5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-746480dd\" data-id=\"746480dd\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-06b79b4 elementor-widget elementor-widget-text-editor\" data-id=\"06b79b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Embora existam muitas variedades de novos materiais cer\u00e2micos, estes podem ser divididos em tr\u00eas categorias, de acordo com as suas fun\u00e7\u00f5es e utiliza\u00e7\u00f5es: cer\u00e2micas funcionais (tamb\u00e9m conhecidas como cer\u00e2micas electr\u00f3nicas), cer\u00e2micas estruturais (tamb\u00e9m conhecidas como cer\u00e2micas de engenharia) e cer\u00e2micas biol\u00f3gicas. Podem ser divididas em cer\u00e2micas de \u00f3xidos, cer\u00e2micas de nitretos, cer\u00e2micas de boretos, cer\u00e2micas de carbonetos e cermets de acordo com as diferentes <a href=\"https:\/\/www.aluminaceramicball.com\/pt\/vantagens-do-po-de-alumina\/\">mat\u00e9rias-primas<\/a> utilizados. Entre elas, a cer\u00e2mica de alumina \u00e9 uma das mais importantes, e a sua mat\u00e9ria-prima \u00e9 <a href=\"https:\/\/www.aluminaceramicball.com\/pt\/produto\/po-ceramico-de-alumina\/\" target=\"_blank\" rel=\"noopener\">P\u00f3 de \u03b1-alumina<\/a> de v\u00e1rias especifica\u00e7\u00f5es.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c10639 elementor-widget elementor-widget-image\" data-id=\"5c10639\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.aluminaceramicball.com\/pt\/produto\/po-ceramico-de-alumina\/\" target=\"_blank\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"438\" src=\"https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-1024x438.webp\" class=\"attachment-large size-large wp-image-7068\" alt=\"P\u00f3 de alumina P\u00f3 de alumina\" srcset=\"https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-1024x438.webp 1024w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-300x128.webp 300w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-400x171.webp 400w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-768x329.webp 768w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-1536x657.webp 1536w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale-2048x876.gif 2048w, https:\/\/www.aluminaceramicball.com\/wp-content\/uploads\/2021\/04\/buy-alumina-powder-for-sale.webp 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b1232ce elementor-widget elementor-widget-text-editor\" data-id=\"b1232ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A alumina alfa tem sido amplamente utilizada na produ\u00e7\u00e3o de v\u00e1rios novos materiais cer\u00e2micos devido \u00e0 sua elevada resist\u00eancia, elevada dureza, resist\u00eancia a altas temperaturas, resist\u00eancia \u00e0 abras\u00e3o e uma s\u00e9rie de excelentes propriedades. N\u00e3o s\u00f3 \u00e9 utilizada como mat\u00e9ria-prima em p\u00f3 para cer\u00e2micas de alumina avan\u00e7adas, tais como substratos de circuitos integrados, gemas artificiais, ferramentas de corte, ossos artificiais, etc., como tamb\u00e9m \u00e9 utilizada como suporte de f\u00f3sforo, materiais refract\u00e1rios avan\u00e7ados e materiais abrasivos especiais. Com o desenvolvimento da ci\u00eancia e da tecnologia modernas, os campos de aplica\u00e7\u00e3o da \u03b1-alumina est\u00e3o a expandir-se rapidamente, a procura do mercado tamb\u00e9m est\u00e1 a aumentar e as suas perspectivas s\u00e3o muito amplas.<\/p><p><strong>Aplica\u00e7\u00e3o da \u03b1lfa-alumina em cer\u00e2micas funcionais<\/strong><\/p><p>As cer\u00e2micas funcionais referem-se a cer\u00e2micas avan\u00e7adas que utilizam as suas propriedades el\u00e9ctricas, magn\u00e9ticas, ac\u00fasticas, \u00f3pticas, t\u00e9rmicas e outras ou os seus efeitos de acoplamento para atingir uma determinada fun\u00e7\u00e3o de utiliza\u00e7\u00e3o. T\u00eam propriedades de isolamento, diel\u00e9ctricas, piezoel\u00e9ctricas, piroel\u00e9ctricas e semicondutoras. A condutividade i\u00f3nica, a supercondutividade e muitas outras propriedades el\u00e9ctricas, pelo que possui uma vasta gama de fun\u00e7\u00f5es e uma vasta gama de utiliza\u00e7\u00f5es. Atualmente, as aplica\u00e7\u00f5es pr\u00e1ticas em grande escala s\u00e3o principalmente cer\u00e2micas isolantes para substratos e embalagens de circuitos integrados, cer\u00e2micas isolantes de velas de igni\u00e7\u00e3o para autom\u00f3veis, cer\u00e2micas diel\u00e9ctricas de condensadores amplamente utilizadas em televisores e gravadores de v\u00eddeo, cer\u00e2micas piezoel\u00e9ctricas para v\u00e1rios fins e v\u00e1rios sensores. As cer\u00e2micas sens\u00edveis s\u00e3o tamb\u00e9m utilizadas em l\u00e2mpadas de s\u00f3dio de alta press\u00e3o, etc.<\/p><h2>1. Vela de igni\u00e7\u00e3o em cer\u00e2mica isolante<\/h2><p>A cer\u00e2mica de isolamento de velas de igni\u00e7\u00e3o \u00e9 atualmente a maior aplica\u00e7\u00e3o de cer\u00e2mica em motores. Uma vez que a alumina possui um excelente isolamento el\u00e9trico, elevada resist\u00eancia mec\u00e2nica, resist\u00eancia a altas tens\u00f5es e resist\u00eancia ao choque t\u00e9rmico, as velas de igni\u00e7\u00e3o isoladas com alumina s\u00e3o amplamente utilizadas em todo o mundo. O requisito de alfa-alumina para velas de igni\u00e7\u00e3o \u00e9 o p\u00f3 de mon\u00f3xido de alum\u00ednio alfa comum com baixo teor de s\u00f3dio, no qual o teor de \u00f3xido de s\u00f3dio \u00e9 \u22640,05%, e o tamanho m\u00e9dio das part\u00edculas \u00e9 de 325 mesh.<\/p><h2>2. Substrato de circuito integrado e materiais de embalagem<\/h2><p>As cer\u00e2micas utilizadas como materiais de substrato e materiais de embalagem s\u00e3o superiores aos pl\u00e1sticos nos seguintes aspectos: elevada resist\u00eancia ao isolamento, elevada resist\u00eancia qu\u00edmica, elevada veda\u00e7\u00e3o, podem impedir a passagem de humidade, n\u00e3o t\u00eam reatividade e n\u00e3o poluem o sil\u00edcio semicondutor ultrapuro.<\/p><p>As propriedades da \u03b1-alumina necess\u00e1rias para substratos de circuitos integrados e materiais de embalagem s\u00e3o coeficiente de expans\u00e3o t\u00e9rmica 7,0 \u00d7 10-6 \/ \u2103, condutividade t\u00e9rmica 20-30W \/ K - m (temperatura ambiente), constante diel\u00e9trica 9-12 (IMHz), perda diel\u00e9trica 3 ~ 10-4 (IMHz), resistividade de volume&gt; 1012-1014\u03a9 - cm (temperatura ambiente).<\/p><p>Com o elevado desempenho e a elevada integra\u00e7\u00e3o dos circuitos integrados, os substratos e os materiais de embalagem s\u00e3o objeto de requisitos mais rigorosos:<\/p><h3>-\u00c0 medida que a produ\u00e7\u00e3o de calor do chip aumenta, \u00e9 necess\u00e1ria uma maior condutividade t\u00e9rmica.<\/h3><h3>-\u00c0 medida que os componentes aritm\u00e9ticos aumentam de velocidade, \u00e9 necess\u00e1ria uma constante diel\u00e9ctrica baixa.<\/h3><h3>-O coeficiente de expans\u00e3o t\u00e9rmica deve ser pr\u00f3ximo do do sil\u00edcio. Este facto coloca requisitos mais elevados \u00e0 \u03b1-alumina, ou seja, desenvolve-se no sentido de uma elevada pureza e finura.<\/h3><h2>3. Tubo luminoso de s\u00f3dio de alta press\u00e3o<\/h2><p>As cer\u00e2micas finas feitas de alumina ultrafina de alta pureza como mat\u00e9ria-prima t\u00eam as carater\u00edsticas de resist\u00eancia a altas temperaturas, resist\u00eancia \u00e0 corros\u00e3o, bom isolamento e alta resist\u00eancia. \u00c9 um excelente material cer\u00e2mico \u00f3tico. \u00c9 um policristal transparente feito de alumina de alta pureza com uma pequena quantidade de magn\u00e9sia, \u00f3xido de lant\u00e2nio ou \u00f3xido de ir\u00eddio e outros aditivos, e \u00e9 feito por sinteriza\u00e7\u00e3o em atmosfera e sinteriza\u00e7\u00e3o por prensagem a quente. Pode suportar a corros\u00e3o do vapor de s\u00f3dio a alta temperatura e pode ser utilizado como l\u00e2mpada emissora de luz de s\u00f3dio de alta press\u00e3o. A sua efici\u00eancia de ilumina\u00e7\u00e3o \u00e9 elevada.<\/p><h3>Aplica\u00e7\u00e3o de \u03b1-Alumina em cer\u00e2mica estrutural<\/h3><h3>Aplica\u00e7\u00e3o de \u03b1-Alumina em Biocer\u00e2mica<\/h3><p>Como materiais biom\u00e9dicos inorg\u00e2nicos, os materiais biocer\u00e2micos n\u00e3o t\u00eam efeitos t\u00f3xicos e secund\u00e1rios em compara\u00e7\u00e3o com os materiais met\u00e1licos e os materiais polim\u00e9ricos e t\u00eam boa biocompatibilidade e resist\u00eancia \u00e0 corros\u00e3o com os tecidos biol\u00f3gicos. As pessoas t\u00eam prestado cada vez mais aten\u00e7\u00e3o a estes materiais. A investiga\u00e7\u00e3o e a aplica\u00e7\u00e3o cl\u00ednica dos materiais cer\u00e2micos desenvolveram-se desde a substitui\u00e7\u00e3o e o enchimento a curto prazo at\u00e9 \u00e0 planta\u00e7\u00e3o permanente e firme, desde materiais biologicamente inertes at\u00e9 materiais biologicamente activos e materiais comp\u00f3sitos multif\u00e1sicos.<\/p><p>Nos \u00faltimos anos, as cer\u00e2micas porosas de alumina t\u00eam sido utilizadas para fabricar articula\u00e7\u00f5es esquel\u00e9ticas artificiais, articula\u00e7\u00f5es artificiais do joelho, cabe\u00e7as femorais artificiais, outros ossos artificiais, ra\u00edzes dent\u00e1rias artificiais e ossos devido \u00e0 sua resist\u00eancia qu\u00edmica, resist\u00eancia ao desgaste, estabilidade a altas temperaturas e propriedades termoel\u00e9ctricas. Fixa\u00e7\u00e3o de parafusos e repara\u00e7\u00e3o da c\u00f3rnea, etc. O m\u00e9todo para controlar o tamanho dos poros durante a prepara\u00e7\u00e3o de cer\u00e2mica de alumina porosa \u00e9: misturar part\u00edculas de alumina de diferentes tamanhos de part\u00edculas, espumar as part\u00edculas e secar as part\u00edculas por pulveriza\u00e7\u00e3o. A placa de alum\u00ednio tamb\u00e9m pode ser anodizada para produzir poros orientados do tipo canal microporoso em nanoescala.<\/p><p>Em compara\u00e7\u00e3o com o m\u00e9todo acima descrito, o m\u00e9todo sol-gel pode melhorar ainda mais o controlo da distribui\u00e7\u00e3o do tamanho dos poros, da transi\u00e7\u00e3o de fase, da pureza e da microestrutura das cer\u00e2micas porosas de alumina. O processo de prepara\u00e7\u00e3o de cer\u00e2micas porosas de alumina pelo m\u00e9todo sol-gel \u00e9 o seguinte: o p\u00f3 de alum\u00ednio \u00e9 hidrolisado numa solu\u00e7\u00e3o de cloreto de alum\u00ednio para obter um sol de alum\u00ednio e o agente formador de poros \u00e9 misturado diretamente com o sol de alum\u00ednio, sendo o produto formado e cozido.<\/p><p>Pode <a href=\"https:\/\/www.aluminaceramicball.com\/pt\/produto\/\" target=\"_blank\" rel=\"noopener\">ver mais produtos<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Although there are many varieties of new ceramic materials, they can be roughly divided into three categories according to their functions and uses functional ceramics (also known as electronic ceramics), structural ceramics (also known as engineering ceramics), and biological ceramics. It can be divided into oxide ceramics, nitride ceramics, boride ceramics, carbide ceramics, and cermets [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[137],"tags":[464],"class_list":["post-7067","post","type-post","status-publish","format-standard","hentry","category-alumina-powder","tag-alumina-powder-tech-service"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The application of alpha alumina in new alumina ceramics | Alumina Ceramic Products Manufacturer<\/title>\n<meta name=\"description\" content=\"The application of alpha alumina in new alumina ceramics, Know more About Knowledge for Tabular Alumina, Alumina Grinding Ball, Alumina Ceramic Grinding Column, Alumina Ceramic Lined Pipe, Alumina Ceramic Powder, Alumina ceramic lining Bricks, Alumina Ceramic Mosaic Tile, Alumina ceramic Plate, High Alumina Ceramic Balls Wet 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cer\u00e2micas de alumina | Fabricante de produtos cer\u00e2micos de alumina","description":"A aplica\u00e7\u00e3o da alfa-alumina em novas cer\u00e2micas de alumina, Saiba mais sobre o conhecimento para Alumina tabular, Bola de moagem de alumina, Coluna de moagem de cer\u00e2mica de alumina, Tubo revestido de cer\u00e2mica de alumina, P\u00f3 de cer\u00e2mica de alumina, Tijolos de revestimento de cer\u00e2mica de alumina, Mosaico de cer\u00e2mica de alumina, Placa de cer\u00e2mica de alumina, Bolas de cer\u00e2mica de alta alumina Moagem h\u00famida","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.aluminaceramicball.com\/pt\/aplicacao-de-alfa-alumina-em-novas-ceramicas-de-alumina\/","og_locale":"pt_PT","og_type":"article","og_title":"The application of alpha alumina in new alumina ceramics | Alumina Ceramic Products 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