{"id":16334,"date":"2025-12-15T08:43:22","date_gmt":"2025-12-15T08:43:22","guid":{"rendered":"https:\/\/www.epicmicron.com\/?p=16334"},"modified":"2025-12-15T08:43:25","modified_gmt":"2025-12-15T08:43:25","slug":"methods-for-distinguishing-between-primary-particles-and-secondary-agglomerates","status":"publish","type":"post","link":"https:\/\/www.epicmicron.com\/de\/methods-for-distinguishing-between-primary-particles-and-secondary-agglomerates\/","title":{"rendered":"Methoden zur Unterscheidung zwischen Prim\u00e4rpartikeln und Sekund\u00e4ragglomeraten"},"content":{"rendered":"<p>In Bereichen wie der Nanotechnologie, der Materialwissenschaft, der Wirkstoffentwicklung und der Umweltwissenschaft arbeiten wir h\u00e4ufig mit winzigen Partikeln. Die Eigenschaften dieser Partikel werden oft nicht nur durch ihre chemische Zusammensetzung, sondern vor allem durch ihre Existenzform bestimmt. <strong>Prim\u00e4rpartikel<\/strong> Und <strong>Sekund\u00e4re Agglomerate<\/strong> Prim\u00e4rpartikel und Sekund\u00e4ragglomerate geh\u00f6ren zu den grundlegendsten und wichtigsten Konzepten. Ihre pr\u00e4zise Unterscheidung ist die Basis f\u00fcr das Verst\u00e4ndnis der Materialeigenschaften, die Optimierung von Herstellungsverfahren und sogar die Beurteilung ihrer Sicherheit. Dieser Artikel erl\u00e4utert systematisch die Definitionen und Unterschiede zwischen Prim\u00e4rpartikeln und Sekund\u00e4ragglomeraten und gibt eine detaillierte Einf\u00fchrung in verschiedene g\u00e4ngige Methoden zu deren Differenzierung.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"577\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-1024x577.webp\" alt=\"\" class=\"wp-image-16335\" style=\"width:838px;height:auto\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-1024x577.webp 1024w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-300x169.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-768x432.webp 768w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-18x10.webp 18w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder-600x338.webp 600w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/12\/Modified-powder.webp 1403w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">I. Definitionen<\/h2>\n\n\n\n<p>Ein Prim\u00e4rteilchen ist die kleinste unabh\u00e4ngige, diskrete Einheit mit regelm\u00e4\u00dfiger oder unregelm\u00e4\u00dfiger geometrischer Form, die durch Keimbildung und Wachstum innerhalb eines spezifischen Reaktionssystems (wie Verbrennung, F\u00e4llung oder Gasphasensynthese) entsteht. Es kann als die \u201eangeborene\u201c, grundlegendste Einzeleinheit verstanden werden, die w\u00e4hrend des Entstehungsprozesses des Materials gebildet wird.<\/p>\n\n\n\n<p>Ein sekund\u00e4res Agglomerat ist ein komplexeres, zusammengesetztes Partikel, das durch die Aggregation mehrerer prim\u00e4rer Partikel entsteht, die durch eine bestimmte Kraft zusammengehalten werden. Es ist nicht angeboren, sondern bildet sich erst nach der Geburt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">II. Unterschiede<\/h2>\n\n\n\n<p>Die beiden unterscheiden sich deutlich hinsichtlich Struktur und Zusammensetzung, Bildungsmechanismus, Bindungskr\u00e4ften, Stabilit\u00e4t und Auswirkungen auf die Leistung. Die spezifischen Unterschiede werden in der folgenden Tabelle veranschaulicht:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">III. Differenzierungsmethoden<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"524\" height=\"312\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/09\/640-7.webp\" alt=\"Pulver\" class=\"wp-image-15913\" style=\"width:838px;height:auto\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/09\/640-7.webp 524w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/09\/640-7-300x179.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/09\/640-7-18x12.webp 18w\" sizes=\"(max-width: 524px) 100vw, 524px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">1) Elektronenmikroskopie<\/h3>\n\n\n\n<p>Methoden:<\/p>\n\n\n\n<p>\u2022 Scanning Electron Microscopy (SEM): Provides information on particle morphology, size, and distribution. At high magnification, it can reveal that agglomerates are composed of many smaller, well-defined primary particles. Primary particles often exhibit regular geometric shapes (e.g., spherical, cubic), while agglomerates have irregular shapes.<\/p>\n\n\n\n<p>\u2022 Transmissionselektronenmikroskopie (TEM): Sie bietet eine h\u00f6here Aufl\u00f6sung als die Rasterelektronenmikroskopie (REM) und erm\u00f6glicht so eine klarere Beobachtung der Gitterlinien und der inneren Struktur von Prim\u00e4rpartikeln sowie eine pr\u00e4zise Messung ihrer Partikelgr\u00f6\u00dfe. Sie gilt als Goldstandard f\u00fcr die Unterscheidung zwischen nanoskaligen Prim\u00e4rpartikeln und deren Agglomeraten.<\/p>\n\n\n\n<p>Abschluss:<\/p>\n\n\n\n<p>In Elektronenmikroskopaufnahmen werden Einheiten mit klaren Grenzen und innerer Kontinuit\u00e4t als Prim\u00e4rpartikel identifiziert. Strukturen, die aus mehreren solchen, locker oder dicht gepackten Einheiten bestehen, werden als Sekund\u00e4ragglomerate eingestuft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2) Partikelgr\u00f6\u00dfenanalysetechniken<\/h3>\n\n\n\n<p>Methoden:<\/p>\n\n\n\n<p>\u2022 Laserbeugungs-Partikelgr\u00f6\u00dfenanalysator: Dieses Verfahren misst den hydrodynamischen Durchmesser von Partikeln in einem Medium (\u00fcblicherweise einer Fl\u00fcssigkeit) mittels Lichtstreuung. Es misst die scheinbare Gr\u00f6\u00dfe von Agglomeraten im dispergierten Zustand. Ist die mittels Laserbeugung gemessene Gr\u00f6\u00dfe deutlich gr\u00f6\u00dfer als die prim\u00e4re Partikelgr\u00f6\u00dfe, die mittels Elektronenmikroskopie beobachtet wurde, deutet dies auf eine signifikante sekund\u00e4re Agglomeration der Probe in Wasser oder einem L\u00f6sungsmittel hin.<\/p>\n\n\n\n<p>Die R\u00f6ntgenbeugung (XRD) analysiert die Verbreiterung der Beugungspeaks von Kristalliten. Mithilfe der Scherrer-Gleichung l\u00e4sst sich aus diesen Messungen die Kristallitgr\u00f6\u00dfe der Prim\u00e4rpartikel berechnen. Diese Kristallitgr\u00f6\u00dfe spiegelt den Bereich koh\u00e4renter Streuung innerhalb des Kristalls wider und bleibt von physikalischer Agglomeration unbeeinflusst.<\/p>\n\n\n\n<p>Abschluss:<\/p>\n\n\n\n<p>Der Vergleich der mittels R\u00f6ntgenbeugung (XRD) berechneten Kristallitgr\u00f6\u00dfe mit der mittels Laserbeugung gemessenen Agglomeratgr\u00f6\u00dfe ist eine g\u00e4ngige Methode zur Unterscheidung beider Materialien. Liegen die Werte nahe beieinander, deutet dies auf eine gute Dispersion hin, wobei das Material \u00fcberwiegend als Prim\u00e4rpartikel vorliegt. Ist die Agglomeratgr\u00f6\u00dfe deutlich gr\u00f6\u00dfer als die Kristallitgr\u00f6\u00dfe, l\u00e4sst dies auf eine starke sekund\u00e4re Agglomeration schlie\u00dfen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3) Spezifische Oberfl\u00e4chenanalyse (BET-Methode)<\/h3>\n\n\n\n<p>Verfahren:<\/p>\n\n\n\n<p>Die BET-Methode bestimmt die spezifische Oberfl\u00e4che von Partikeln durch Messung der Gasadsorption. Mit dieser Methode l\u00e4sst sich die theoretische Prim\u00e4rpartikelgr\u00f6\u00dfe f\u00fcr sph\u00e4rische Partikel mithilfe der Formel berechnen. <em>Partikelgr\u00f6\u00dfe \u2248 6 \/ (Dichte \u00d7 spezifische Oberfl\u00e4che)<\/em>unter der Annahme, dass alle Teilchen unabh\u00e4ngige Kugeln sind.<\/p>\n\n\n\n<p>Abschluss:<\/p>\n\n\n\n<p>Vergleichen Sie die mittels BET-Methode berechnete Partikelgr\u00f6\u00dfe mit den Ergebnissen aus Elektronenmikroskopie oder R\u00f6ntgenbeugung. Ist die BET-basierte Gr\u00f6\u00dfe kleiner, kann dies auf Poren oder Oberfl\u00e4chenrauheit der Partikel hindeuten. Stimmt sie hingegen gut mit der mittels anderer Methoden gemessenen Prim\u00e4rpartikelgr\u00f6\u00dfe \u00fcberein, best\u00e4tigen sich die Ergebnisse. Ist die tats\u00e4chliche Partikelgr\u00f6\u00dfe, gemessen mit einem Partikelgr\u00f6\u00dfenanalysator, deutlich gr\u00f6\u00dfer als der BET-Wert, belegt dies ebenfalls das Vorliegen von Agglomeration.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4) Dispersions- und Ultraschallpr\u00fcfungen<\/h3>\n\n\n\n<p>Verfahren:<\/p>\n\n\n\n<p>Die Pulverprobe wird in einem geeigneten L\u00f6sungsmittel dispergiert und nach dem Absetzen beobachtet. Eine schnelle Sedimentation zu einem harten Pellet deutet typischerweise auf starke Agglomeration hin. Anschlie\u00dfend wird die Suspension einer Ultraschallbehandlung unterzogen.<\/p>\n\n\n\n<p>Abschluss:<\/p>\n\n\n\n<p>Wenn die mittels Laserbeugung gemessene Partikelgr\u00f6\u00dfe nach der Ultraschallbehandlung deutlich abnimmt und sich der prim\u00e4ren Partikelgr\u00f6\u00dfe aus Elektronenmikroskopie oder R\u00f6ntgenbeugung ann\u00e4hert, deutet dies auf eine zuvor stattgefundene, schwache sekund\u00e4re Agglomeration hin, die durch \u00e4u\u00dfere Krafteinwirkung aufgebrochen werden kann. Ver\u00e4ndert sich die Gr\u00f6\u00dfe vor und nach der Ultraschallbehandlung kaum, k\u00f6nnen die Partikel selbst gro\u00df sein oder die Agglomeration sehr stark sein \u2013 man spricht dann von einer harten Agglomeration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><mark style=\"color:#cf2e2e\" class=\"has-inline-color\">Episches Pulver<\/mark><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"967\" height=\"802\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1.webp\" alt=\"Strahlm\u00fchlen 1\" class=\"wp-image-16090\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1.webp 967w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1-300x249.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1-768x637.webp 768w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1-14x12.webp 14w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/10\/Jet-Mills-1-600x498.webp 600w\" sizes=\"(max-width: 967px) 100vw, 967px\" \/><\/figure>\n\n\n\n<p>When selecting equipment, it&#8217;s essential to look beyond the initial price and consider long-term costs. Epic Powder\u2019s jet mill has low energy consumption and minimal maintenance make it a more cost-effective choice in the long run. At <a href=\"https:\/\/www.epicmicron.com\/de\/products\/\">Episches Pulver<\/a>Wir bieten eine breite Palette an Ger\u00e4temodellen und ma\u00dfgeschneiderte L\u00f6sungen f\u00fcr Ihre individuellen Bed\u00fcrfnisse.<\/p>\n\n\n\n<p>Contact us today for a free consultation and customized solutions!\u00a0Our expert team is dedicated to providing high-quality <a href=\"https:\/\/www.epicmicron.com\/de\/products\/\">Produkte<\/a> und Dienstleistungen zur Maximierung des Werts Ihrer Pulververarbeitung.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.linkedin.com\/showcase\/107512344\/admin\/dashboard\/\">Episches Pulver<\/a>\u2013 Ihr vertrauensw\u00fcrdiger Experte f\u00fcr Pulververarbeitung!<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"EPIC Ultrafeinvermahlung: Mikronisierung von Kokosnussschalenkohle mit einer Luftstrahlm\u00fchle\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/JVRXDC1v2Zc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity is-style-default\" \/>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"602\" height=\"602\" src=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang.webp\" alt=\"Herr Wang\" class=\"wp-image-16245\" style=\"width:150px;height:150px\" srcset=\"https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang.webp 602w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang-300x300.webp 300w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang-100x100.webp 100w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang-12x12.webp 12w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang-60x60.webp 60w, https:\/\/www.epicmicron.com\/wp-content\/uploads\/2025\/11\/Mr-Wang-600x600.webp 600w\" sizes=\"(max-width: 602px) 100vw, 602px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote has-text-align-center is-style-large is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-medium-font-size\">&#8220;Thanks for reading. I hope my article helps. Please leave a comment down below. You may also contact EPIC Powder online customer representative <strong><mark style=\"color:#ff6900\" class=\"has-inline-color\">Zelda<\/mark><\/strong> F\u00fcr weitere Fragen stehen wir Ihnen gerne zur Verf\u00fcgung.<\/p>\n<cite>                                                                                                                    \u2014 <strong><mark style=\"color:#ff6900\" class=\"has-inline-color\">Jason Wang<\/mark><\/strong>, <em>Leitender Ingenieur<\/em><\/cite><\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity is-style-default\" \/>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f15081-o1\" lang=\"zh-CN\" dir=\"ltr\" data-wpcf7-id=\"15081\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/de\/wp-json\/wp\/v2\/posts\/16334#wpcf7-f15081-o1\" method=\"post\" class=\"wpcf7-form init\" 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Die Eigenschaften dieser Partikel werden oft nicht nur durch ihre [\u2026] 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