Synthesis of Yttria-Stabilized Zirconia (YSZ) Ceramic Powder Using Modified Sol-Gel Method

Year 2019, , 871 - 875, 31.12.2019

Aysu Aydınoğlu , Afife Binnaz Hazar Yoruç

https://doi.org/10.35414/akufemubid.619424

Abstract

Zirconia is widely used
ceramic powders as a biomaterial in medical applications due to its similarity
with tooth color, good mechanical and bioinert properties. Its high temperature
forms can be fully or partially stabilized by the addition of oxides such as
MgO, CaO and Y₂O₃. Recently, yttria stabilized zirconia
has been mostly studied because of its lots of advantages. In this study, 3%
mol and 8% mol yttria stabilized zirconia powders have been synthesized using a
simple sol-gel process. ZrO(NO₃)₂.xH₂O and
Y(NO₃)₃.6H₂O was dissolved in ethylene glycol
and pure water, respectively and mixed together. After mixing pH was adjusted
to 3.5 using HNO₃. Final suspension was stirred until it becomes
homogenized. Homogeneous mixture dried at 120°C and then sintered at 1200°C.
Crystallite sizes and mineralogical composition were determined by XRD. Surface
area was measured by BET method and particle size was calculated. Density of
powders was measured by ultrapicnometer. Also, morphological structure was
examined by SEM. Tetragonal ZrO₂ and tetragonal ZrO₂-Y₂O₃
phases were observed. Current studies showed that YSZ powder can be effectively
synthesis with the present method.

Keywords

Yttria-stabilized zirconia; Tetragonal zirconia powder; Stabilization; Sol-gel

Supporting Institution

The Office of Scientific Research Project Coordination; Yildiz Technical University

Project Number

2013-07-02-KAP01

Thanks

This study was supported by the Office of Scientific Research Project Coordination; Yildiz Technical University within the scope of the project number is 2013-07-02-KAP01.

Modifiye Sol-Jel Yöntemi Kullanılarak İtriya Katkılı Zirkonya Sentezi

Abstract

Zirkonya, tıbbi
uygulamalarda, diş rengine benzerliği, iyi mekanik ve biyoinert özellikleri
nedeniyle yaygın olarak kullanılan seramik tozlarıdır. Yüksek sıcaklık formları
MgO, CaO ve Y₂O₃ gibi oksitlerin eklenmesi ile tamamen
veya kısmen dengelenebilir. Son zamanlarda, itriya stabilize zirkonya
çoğunlukla avantajları nedeniyle incelenmiştir. Bu çalışmada, basit bir sol-jel
işlemi kullanılarak %3 mol ve %8 mol itriya stabilize zirkonya tozları
sentezlenmiştir. ZrO(NO₃)₂.xH₂O ve Y(NO₃)₃.6H₂O
sırası ile etilen glikol ve saf su içerisinde çözündürüldü ve karıştırıldı.
Karıştırmanın ardından pH, HNO₃ ile 3.5'e ayarlandı. Elde edilen
süspansiyon homojen hale gelinceye kadar karıştırıldı. Homojen karışım,
120°C'de kurutuldu ve daha sonra 1200°C'de sinterlendi. Elde edilen tozların
kristal boyutları ve mineralojik kompozisyon XRD ile belirlenmiştir. Yüzey
alanı BET metodu ile ölçülmüş ve partikül büyüklüğü hesaplanmıştır. Tozların
yoğunluğu ise ultrapiknometre ile ölçülmüştür. Ayrıca SEM ile morfolojik yapı
incelenmiştir. Tetragonal ZrO₂ ve tetragonal ZrO₂-Y₂O₃
fazları gözlendi. Mevcut çalışmalar, YSZ tozunun bu yöntemle etkili bir şekilde
sentezlenebileceğini göstermektedir.

Keywords

itriya stabilize edilmiş zirkonya, tetragonal zirkonya, stabilizasyon, sol-jel

Project Number

2013-07-02-KAP01

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