Dielectric Properties of BaTiO3 Based Ceramics Prepared from Nano-powders

2003 ◽  
Vol 783 ◽  
Author(s):  
Xiao-Hui Wang ◽  
Ren-Zheng Chen ◽  
Zhi-Lun Gui ◽  
Long-Tu Li
Keyword(s):  
Dielectric Properties ◽  
Chemical Method ◽  
Room Temperature ◽  
Pressureless Sintering ◽  
Wet Chemical Method ◽  
Average Grain Size ◽  
Wet Chemical ◽  
Cubic Structure ◽  
First Time ◽  
Nano Size

ABSTRACTIn this paper, the BaTiO3 nanoceramics have been fabricated by pressureless sintering for the first time. High purity BaTiO3 powders in nano-size of 50∼80nm synthesized by wet chemical method were used to fabricate nanoceramics. The addition of an appropriate amount of Nb2O5 and Co3O4 was found to suppress the grain growth, which is normally encountered in the conventional pressless sintering. The effects of Nb2O5 and Co3O4 on the phase structure, microstructure and dielectric properties of the sintered ceramics were investigated. The BaTiO3 ceramics with the average grain size less than 100nm were achieved after sintering below 1220°C with dielectric constant up to 2000 at room temperature, which is of cubic structure and meets the requirement of X7R specification.

Fabrication and characterization of n-ZnO nanorods/p-Si (100) heterojunction

2015 ◽  
Vol 24 (04) ◽  
pp. 1550050 ◽  
Author(s):  
Kieu Loan Phan Thi ◽  
Lam Thanh Nguyen ◽  
Anh Tuan Dao ◽  
Nguyen Huu Ke ◽  
Vu Tuan Hung Le
Keyword(s):  
Chemical Method ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Average Height ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Wet Chemical ◽  
Fabrication And Characterization

In this paper, ZnO nanorods were grown by wet chemical method on p-Si (100) substrate to form n-ZnO nanorods/p-Si (100) heterojunction. The optical, electrical, structural properties of n-ZnO nanorods/p-Si(100) heterojunction were analyzed by the photoluminescence (PL) spectroscopy, [Formula: see text]–[Formula: see text] measurement, X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The room temperature PL spectra reveal the good optical property of the heterojunction with strong UV peak at 385[Formula: see text]nm. The ZnO nanorods were vertically well-aligned on p-Si (100) and had an average height of about 1.6[Formula: see text][Formula: see text]m. The n-ZnO nanorods/p-Si (100) heterojunction also exhibits diode-like-rectifying-behavior.

Synthesis and Evaluation of Hollow-Tubular ZnO by Wet Chemical Method

2007 ◽  
Vol 124-126 ◽  
pp. 571-574
Author(s):  
Hideaki Murase ◽  
Shoichiro Shio ◽  
Atsushi Nakahira
Keyword(s):  
Chemical Process ◽  
Aging Process ◽  
Chemical Method ◽  
Room Temperature ◽  
Single Phase ◽  
Chemical Processing ◽  
Wet Chemical Method ◽  
High Transparency ◽  
Wet Processing ◽  
Wet Chemical

In this study, morphology control of ZnO was performed by a wet chemical processing without templates at room temperature. In special, the effect of aging time and pH of this wet processing on ZnO morphologies was in detail investigated. As a result, products composed of a single phase of ZnO with a unique morphology like a hollow tube were obtained. Then, it was found that an aging process played an important role on controlling morphology of ZnO during this wet chemical process. Furthermore, it was found that this hollow-tubular ZnO had a high transparency.

A porous PdO microrod-based electrochemical sensor for nanomolar-level Cu2+ released from cells

2014 ◽  
Vol 2 (44) ◽  
pp. 7719-7724 ◽  
Author(s):  
Xia Cao ◽  
Yu Han ◽  
Caizhen Gao ◽  
Ying Xu ◽  
Xiaomin Huang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Surface Area ◽  
Active Sites ◽  
Chemical Method ◽  
Large Surface Area ◽  
Wet Chemical Method ◽  
Wet Chemical ◽  
First Time ◽  
Highly Porous

Highly porous PdO microrods (PoPdOMRs) with a well-defined morphology, large surface area and active sites were synthesized via a facile wet chemical method for the first time.

Perovskites beyond photovoltaics: field emission from morphology-tailored nanostructured methylammonium lead triiodide

2017 ◽  
Vol 19 (39) ◽  
pp. 26708-26717 ◽  
Author(s):  
Nripen Besra ◽  
Shreyasi Pal ◽  
Bikram Kumar Das ◽  
Kalyan Kumar Chattopadhyay
Keyword(s):  
Field Emission ◽  
Chemical Method ◽  
Room Temperature ◽  
Wet Chemical Method ◽  
Synthesis Parameters ◽  
Simple Variation ◽  
Wet Chemical

Herein, methylammonium lead triiodide (CH3NH3PbI3) nanorods and nanocrystals were prepared by a facile room-temperature wet chemical method via simple variation of the synthesis parameters and their field emission performances were investigated.

Methanolysis of ammonia borane by shape-controlled mesoporous copper nanostructures for hydrogen generation

2015 ◽  
Vol 44 (3) ◽  
pp. 1070-1076 ◽  
Author(s):  
Qilu Yao ◽  
Ming Huang ◽  
Zhang-Hui Lu ◽  
Yuwen Yang ◽  
Yuxin Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Chemical Method ◽  
Room Temperature ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
Wet Chemical Method ◽  
Wet Chemical ◽  
Shape Controlled ◽  
Cu Nanostructures

A facile and scaleable wet-chemical method has been successfully applied to the synthesis of diverse mesoporous Cu nanostructures, which exhibited excellent catalytic activity for hydrogen generation from the methanolysis of AB at room temperature.

Facile synthesis of Fe-baicalein nanoparticles for photothermal/chemodynamic therapy with accelerated Fe(III)/Fe(II) conversion

2021 ◽  
Author(s):  
Zhendong Liu ◽  
Chunling Hu ◽  
Sainan Liu ◽  
Lihan Cai ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Conversion Efficiency ◽  
Chemical Method ◽  
Room Temperature ◽  
Antitumor Efficacy ◽  
Wet Chemical Method ◽  
Facile Synthesis ◽  
Photothermal Conversion ◽  
Wet Chemical

Fe(II)-baicalein-polyethylene glycol (Fe-BaP) nanoparticles were synthesized by a room temperature wet chemical method via coordination between Fe(II) and baicalein. Fe-BaP possessed high photothermal conversion efficiency (η=45.6%) and excellent antitumor efficacy...

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