Effect of SrO addition on the crystalline gro
wth behavior of ZrO
2–3Y
2O
3 precursor po
wders using a coprecipitation process has been studied. Zirconium nitrate (Zr(NO
3)
4·
xH
2O), yttrium nitrate (Y(NO
3)
3·6H
2O) and strontium nitrate (Sr(NO
3)
2)
were used as the initial materials. Crystalline gro
wth behavior
was investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), nano beam electron diffraction (NBED) and high-resolution TEM (HRTEM). The XRD results sho
wed the ZrO
2–3Y
2O
3–
xSrO only contained single phase of tetragonal ZrO
2 (t-ZrO
2)
when the precursor po
wders
were calcined at different temperatures for various durations. The crystallite size increased from 22.91 to 27.44 nm
when the ZrO
2–3Y
2O
3–1SrO precursor po
wders after calcination at 823 K from 15 to 120 min. The activation energy values obtained are 9.98, 9.04 and 7.43 kJ/mol for SrO addition amount of 1, 2 and 3 mol%, respectively, and the kinetics equations of t-ZrO
2 crystalline gro
wth
with SrO addition are also expressed as follo
ws:
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w the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0272884216302887&_mathId=si0004.gif&_user=111111111&_pii=S0272884216302887&_rdoc=1&_issn=02728842&md5=e4c95e52349b7f6b25660bbcefd3489a">
width="142" alt="View the MathML source" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S0272884216302887-si0004.gif"> with SrO content for 1, 2 and 3 mol%, respectively, for 15≤
t≤120 min and 773≤
T≤923 K.