تأثیر مقادیر متفاوت ZnO بر تغییرات ریزساختاری در شیشه‌های آلومینوسیلیکاتی

نوع مقاله : علمی و پژوهشی

نویسندگان

1 گروه مهندسی متالورژی و مواد، دانشکده مهندسی، دانشگاه فردوسی مشهد.

2 گروه مهندسی متالورژی و مواد، دانشکده مهندسی، دانشگاه فردوسی مشهد،

چکیده

در تحقیق حاضر تأثیر مقادیر متفاوتZnO بر خواص فیزیکی و رفتار تبلور شیشه‌های سیستم SiO2-Al2O3-p 2O5-CaF2-CaO-K2O-Na2O-xZnOبررسی شده است و تأثیر اکسید روی بر دماهای شیشه‌ای‌شدن و تبلور با استفاده از DTAمطالعه شد. نوع و شدت پیوندها با استفاده از FTIR و RAMAN، نوع فازهای متبلورشده به‌کمک XRD و درنهایت ریزسختی شیشه‌ها با آزمون ویکرز مطالعه شد. برای مطالعۀ تأثیر عملیات حرارتی بر دما و نوع فازهای متبلورشده، نمونه‌های تهیه‌شده به‌صورت جداگانه در ۲دمای °C 750 و °C 1100 به‌مدت 3ساعت عملیات حرارتی شدند. نتایج DTA نشان داد افزایش مقدار اکسید روی تا 3درصد وزنی، منجر به افزایش نسبی دمای تبلور می‌شود. نتایج FTIR حاکی از آن بود که اکسید روی تأثیر چشمگیری بر نوع پیوندها در نمونه‌های شیشه‌ایی نداشته است. پس از نرماله‌کردن نتایج میکروسختی ویکرز و ارزیابی این نتایج به‌کمک ANOVA، مشخص شد در مقایسه با نمونۀ بدون افزودنی، نمونه‌های حاوی 1 و 2گرم اکسید روی از سختی بالاتری برخوردارند.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Different Amounts of ZnO on Structural Properties of Aluminosilicate Glasses

نویسندگان [English]

  • Zahra Kahrobaee 1
  • Sajad Azghandirad 1
  • Javad NaeemAbadi 1
  • Masoud Tavakolian Akbari 1
  • Sahar Mollazadeh 1
  • Mohammad Mazinani 2
1 Department of Materials Engineering, Faculty of Engineering, Ferdowsi University Of Mashhad.
2 Department of Materials Engineering, Faculty of Engineering, Ferdowsi University Of Mashhad.
چکیده [English]

The effect of different amounts of ZnO on structural properties of SiO2-Al2O3-p < sub>2O5-CaF2-CaO-K2O-Na2O-xZnOglasses was studied. The effect of ZnO addition on glass transition and crystallization temperatures were studied by DTA. FTIR and RAMAN were used to study the characteristic bands of prepared glasses. All samples were heat treated at two different temperatures of 750 and 1100°C. XRD analysis showed that anorthite and calciumphosphate were the main crystalline phases. Based on DTA and XRD results, samples with higher amounts of ZnO were crystallized at higher temperatures. No significant band changes were detected as a result of ZnOaddition as spectroscopic results showed. Vickers microhardness numbers showed that ZnO addition up to 2gr lead to a significant (p < 0.05) improvement in microhardness values.

کلیدواژه‌ها [English]

  • Glass-ceramic
  • Zinc Oxid
  • Heat-treatment
  • Micro-hardness
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