مروری بر لعاب‌های بلورین

نوع مقاله : مقاله مروری

نویسندگان

1 دانشیار، مجتمع مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر

2 کارشناس مسئول پژوهشی، گروه پژوهشی رنگ‌های سرامیکی و لعاب، پژوهشگاه رنگ

3 دانشجوی کارشناسی ارشد، مجتمع مواد و فناوری‌های ساخت، دانشگاه صنعتی مالک اشتر

چکیده

لعاب‌های بلورین به عنوان پوشش‌هایی با کاربردهای متنوع، از جمله تزیین بدنه‌های سرامیکی و یا بهبود خواص مکانیکی، نوری و غیره استفاده می‌شوند. بسته به شرایط لعاب، ترکیب بدنه و برنامه حرارتی، بلورهای متنوعی در فاز مایع لعاب به وجود می‌آید که گاهی باعث ایجاد یا بهبود خواص و گاهی باعث خلق جلوه‌های ویژه و انحصاری در لعاب می‌شود. این لعاب‌ها را می‌توان بر اساس اندازه (ماکرو، میکرو و نانو) و یا بر اساس نوع بلور و ترکیب (هماتیت، آنورتیت، پیروکسین و غیره / زیرکونیم، نقره، طلا و غیره) دسته‌بندی نمود. سیلیس، گدازآورها و بلور‌سازها سه جز اصلی ترکیب پایه لعاب بلوری هستند و سازوکار تشکیل بلورها در لعاب همان سازوکار جوانه‌زنی و رشد است. عوامل تاثیرگزار بر تشکیل و رشد بلور‌ها شامل ترکیب، ضخامت، نوع و مقدار جوانه‌زا و رنگ‌سازها در لعاب، طراحی و مدت زمان منحنی پخت (گرمایش و سرمایش)، دما و زمان جذب در فرآیند رشد، اتمسفر کوره و همچنین ترکیب و شکل هندسی بدنه سرامیکی است. در این مطالعه برخی از این عوامل به اختصار شرح داده خواهد شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

A Review of Crystalline Glazes

نویسندگان [English]

  • Mehri Mashhadi 1
  • maryam salehi 2 3
1 Department of Inorganic Pigments and Glaze, Institute for Color Science and Technology
2 Department of Inorganic Pigments and Glaze, Institute for Color Science and Technology | University Complex of Materials and Manufacturing Technology, Malek-Ashtar University of Technology
3 Department of Inorganic Pigments and Glaze, Institute for Color Science and Technology | University Complex of Materials and Manufacturing Technology, Malek-Ashtar University of Technology
چکیده [English]

Crystal glazes are used as functional coatings with applications such as decorating ceramic bodies or improving mechanical, opacity and other properties. Depending on the glaze conditions, ceramic body and heat program, various crystals are created in the liquid phase of the glaze that sometimes create or improve the properties and sometimes create special luster and unique effects in the glaze. These glazes can be classified based on size (macro, micro, nano), type of crystal and composition (hematite, anorthite, pyroxin, etc. /zircon, silver, gold, etc.). Silica, fluxes and crystallizers are the main components of the crystalline glaze base composition and the crystalline formation mechanism in the glaze is the same as the nucleation and growth mechanism.Factors affecting the formation and growth of crystals: the composition, thickness, type and amount of nucleates and coloring agents in the glaze, design and duration of heat firing curve (heating and cooling), temperature and time of absorption in the growth process, furnace atmosphere and also the composition and geometric form of the ceramic body. In this study, some of these factors will be briefly explained.

کلیدواژه‌ها [English]

  • Crystalline Glaze
  • Nucleation and Growth
  • Nano
  • Micro
  • Macro
  • Artistic glaze
  • Luster
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