filter busa keramik<\/a> Dalam hal bahan pengisi dan bahan tahan api, diperlukan penggunaan bahan granular yang inert secara kimia, seperti aluminium oksida.<\/p>\n![\"Filter](\"http:\/\/www.adtechamm.com\/wp-content\/uploads\/2019\/09\/Reticulated-ceramic-foam-filters.jpg\")
<\/p>\n
Namun, alumina memiliki koefisien muai panas linier yang relatif tinggi (8,0 \u00d7 10\u207b\u2076 \/ \u00b0C), dan bentuk monolitik alumina, seperti filter busa keramik, memiliki ketahanan panas yang rendah akibat tegangan termal yang tinggi yang disebabkan oleh kombinasi gradien termal akibat pemanasan yang tidak merata serta koefisien ekspansi termal yang tinggi.
\nSelama proses pemanasan awal dan kontak awal dengan logam cair, bahan filter busa keramik berpori jaring dapat retak atau pecah, sehingga bahan filter tersebut masuk ke dalam ingot atau billet, di mana kemudian menjadi inklusi.
\nSelain itu, ketika filter keramik berbahan dasar busa alumina ditempatkan di dalam wadah filter selama proses pemanasan awal dan saat digunakan, tegangan tekan melintang yang tinggi dapat timbul akibat koefisien muai panas filter yang tinggi, sehingga menyebabkan kerusakan pada filter saat mengalami kompresi.<\/p>\n
Berikut ini adalah persyaratan untuk bahan yang ideal bagi filter busa keramik.
\n1. Ketahanan terhadap suhu tinggi \u2013 bahan tersebut tidak boleh retak atau pecah selama proses pemanasan awal atau saat bersentuhan dengan logam cair. Bahan tersebut harus memiliki koefisien muai panas yang rendah untuk meminimalkan tegangan kompresi lateral saat berada di dalam mangkuk filter.
\n2. Ketahanan terhadap korosi \u2013 bahan filter tidak boleh memiliki aktivitas kimia yang signifikan dalam rentang aplikasi yang dimaksud (waktu, suhu, kandungan paduan) dan tidak boleh terkena aluminium cair serta paduan-paduannya yang umum.
\n3. Kekuatan lentur dan tekan yang memadai.
\n4. Profitabilitas di sektor manufaktur.
\n5. Bahan filter setelah digunakan harus aman untuk ditangani dan dibuang.
\n6. Memiliki kepadatan rendah atau bobot yang ringan, sehingga memudahkan pekerjaan operator jembatan tuang.<\/p>","protected":false},"excerpt":{"rendered":"
Reticulated ceramic foam filters Reticulated ceramic foam filters used in aluminum oxide granular material should seem an obvious choice to any person skilled in the art of refractory materials used to contain molten aluminum and its alloys. Alumina is relatively chemically inert in molten aluminum…<\/p>","protected":false},"author":1,"featured_media":5655,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[26524],"tags":[],"yoast_head":"\n
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