Al2O3 AND ZrO2 CERAMIC MATERIALS OBTAINED BY SOL-GEL METHOD

2021 ◽  
pp. 61-73
Author(s):  
Yu.E. Lebedeva ◽  
◽  
N.E. Shchegoleva ◽  
V.A. Voronov ◽  
St.S. Solntcev ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Zirconium Dioxide ◽  
Monoclinic Phase ◽  
Eutectic Composition ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Gel Method ◽  
Sol Gel Method ◽  
Zro2 System ◽  
Sintered Materials

The rheological properties, processes of structure and phase formation of the Al2O3–ZrO2 system compositions obtained by the sol-gel method have been investigated. The temperature range of crystallization of the compositions is 900–1100 °C. With an increase in the concentration of zirconium dioxide in the system, the temperature of the transition from the tetragonal to the monoclinic phase decreases. The effect of the ratio of the components in the initial solutions and the temperature regime of heat treatment of gels on the physicochemical properties of nanopowders and sintered materials has been studied. Ceramic materials of eutectic composition give the highest density and lower values of porosity and water absorption.

Preparation of La0.75Sr0.25Cr0.5Mn0.5O3-δ Nanometer Powders by Sol-Gel Method and Research about its Electrochemical Performance

2013 ◽  
Vol 712-715 ◽  
pp. 257-261
Author(s):  
Yin Lin Wu ◽  
Qing Hui Wang ◽  
Ling Wang ◽  
Hai Yan Zhao
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Electrochemical Performance ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Treatment Temperature ◽  
Preparation Process ◽  
Gel Method ◽  
Sol Gel Method ◽  
Ft Ir

The La0.75Sr0.25Cr0.5Mn0.5O3-δnanometer powders were prepared by citric acid sol-gel method.The samples were characterized by DTA, FT-IR, XRD, TEM techniques. The preparation process, morphology of synthesized powders, the best heat-treatment temperature and the electrochemical performance had been studied. The results show that the spherical nanometer powders can be obtained and the best heat-treatment temperature is 800°C. The particle size is about 30nm and Ea is 0.071 eV.

Synthesis and characterization of macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) and its application in metal ion detection

2019 ◽  
Vol 43 (21) ◽  
pp. 8315-8324
Author(s):  
Hui Yang ◽  
Rui Wang ◽  
Yaozu Wang ◽  
Jianzhong Jiang ◽  
Xingzhong Guo
Keyword(s):  
Heat Treatment ◽  
Metal Ion ◽  
Sol Gel ◽  
Synthesis And Characterization ◽  
Practical Application ◽  
Ion Detection ◽  
Gel Method ◽  
Sol Gel Method ◽  
Metal Ion Detection

Macroporous europium-doped Ca12Al14O33 (C12A7:Eu3+) was prepared via a sol–gel method followed by heat-treatment, and the resultant macroporous C12A7:Eu3+ shows potential for practical application in metal ion detection and has a good response to Pb2+ ions.

Fabrication of Bi-2223 Powders Using Sol-Gel Method

2011 ◽  
Vol 412 ◽  
pp. 125-128 ◽  
Author(s):  
Ming Ya Li ◽  
Xiao Yan Wang ◽  
Cheng Li Ye ◽  
Feng Lin Xue
Keyword(s):  
Heat Treatment ◽  
Sol Gel ◽  
Chelating Agent ◽  
Experimental Results ◽  
Main Phase ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dwelling Time ◽  
Metal Nitrates ◽  
Gel Technique

The Bi-2223 powders were fabricated by the sol-gel technique. Metal nitrates were used as starting materials, and ethylenediamineteracetic acid was used as chelating agent. The solution was heated until it turns to gel. Then the organic was removed at a temperature of 240°C, and the nitrite was removed at 500°C. The powder was calcined at different temperature, varying the dwelling time. Experimental results show that the main phase of samples after heat treatment is Bi-2212 phase.

Effects of cooling rate and post-heat treatment on properties of ZnO thin films deposited by sol–gel method

2011 ◽  
Vol 257 (21) ◽  
pp. 9019-9023 ◽  
Author(s):  
Min Su Kim ◽  
Kwang Gug Yim ◽  
Dong-Yul Lee ◽  
Jin Soo Kim ◽  
Jong Su Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Cooling Rate ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Post Heat Treatment ◽  
Gel Method ◽  
Sol Gel Method

The Process of Sol-Gel Method Prepared Bi-2212 Superconductors Tapes

2013 ◽  
Vol 275-277 ◽  
pp. 2300-2303
Author(s):  
Gen Zong Song ◽  
Duo Zhang
Keyword(s):  
Heat Treatment ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Ni Substrate ◽  
Treatment Conditions ◽  
Drying Conditions ◽  
And Control

In this dissertation, Bi-2212 superconducting tapes was prepared by sol-gel method, in addition we mainly studied heat treatment conditions and sintering material drying conditions of the NiO/Ni substrate, and gived a optimization to the process. The heat treatment process of the NiO/Ni substrate had been researched.Based on previous experience, we explored the temperature of heat treatment and improved the process.Afterheattreatment,the samples was analyzed by metallographic microscope and X-ray diffraction,and we analysed these data. It’s concluded that the dense uniform oxide film can be sintered in 800°C with a 3 hours’ heat treatment.We further explored the conditions of the Bi-2212 superconducting materials.During the preparation. We mainly studied the drying temperature and sintering temperature ,because they would affect the gel phase transition and control components. It has a very important effect on high-quality superconducting strip preparation. Experiments results showed that drying the sample at 510 °C in temperature is best. all the samples was analyzed by X-ray diffraction. We summed up the data derived from experiments , it showed that sintering the sample at 850°C,we can obtain the mixed phase of Bi-2201 and Bi-2212.

The effect of heat treatment in the reducing atmosphere on the physical properties of TiO2 thin films prepared by sol–gel method

2013 ◽  
Vol 67 (2) ◽  
pp. 236-243 ◽  
Author(s):  
Maryam Sadat Ghorashi ◽  
Azarmidokht Hosseinnia ◽  
Fereydoun Alikhani Hessari ◽  
Yadolah Ganjkhanlou
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Physical Properties ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Reducing Atmosphere

Effect of heat treatment conditions on the growth of MgAl2O4 nanoparticles obtained by sol-gel method

2017 ◽  
Vol 43 (17) ◽  
pp. 15246-15253 ◽  
Author(s):  
Yubin Wen ◽  
Xinhong Liu ◽  
Xiaoyu Chen ◽  
Quanli Jia ◽  
Renhong Yu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Treatment Conditions
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