Improvement of properties of ZnO varistors by low-temperature two-step sintering method

A high potential gradient of ZnO varistors were fabricated by Y 2 O 3-doping and low-temperature sintering. The value of the potential gradient increased to 2460.5 V/mm with the Y 2 O 3 content of 0.08 mol% and the sintering temperature of 800°C. The effects of Y 2 O 3-doping and sintering temperature on the electrical properties of ZnO varistors were investigated. Under the given experimental conditions, additive Y 2 O 3 exists in the form of Y 2 O 3 phase after sintering at 800°C. High-energy ball-milling in the early period of the experiment induced the grain refinement and realized the sintering formation at the lower temperature of 800°C. Both Y 2 O 3-doping and low-temperature sintering restrained the ZnO grain growth and increased the potential gradient.

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Low Temperature Sintering of SrZn2W - type Ferrites by Spark Plasma Sintering Method and Evaluation of Their Magnetic Properties

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.60.121 ◽

2013 ◽

Vol 60 (3) ◽

pp. 121-127

Author(s):

Yusuke RYOSHI ◽

Takashi NAKAGAWA ◽

Yoshinori KOBAYASHI ◽

Satoshi SEINO ◽

Takao A YAMAMOTO

Keyword(s):

Magnetic Properties ◽

Low Temperature ◽

Spark Plasma Sintering ◽

Low Temperature Sintering ◽

Plasma Sintering ◽

Spark Plasma ◽

Sintering Method

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Luminescence properties of Nd:YAG nanoceramics prepared by low temperature high pressure sintering method

Optical Materials ◽

10.1016/j.optmat.2006.05.014 ◽

2007 ◽

Vol 29 (10) ◽

pp. 1244-1251 ◽

Cited By ~ 28

Author(s):

D. Hreniak ◽

R. Fedyk ◽

A. Bednarkiewicz ◽

W. Stręk ◽

W. Łojkowski

Keyword(s):

High Pressure ◽

Low Temperature ◽

Luminescence Properties ◽

High Pressure Sintering ◽

Sintering Method

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Preparation and Characterization of (1-x)BiScO3-xPbTiO3 Ceramics by Two-Step Sintering

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.8 ◽

2008 ◽

Vol 368-372 ◽

pp. 8-10 ◽

Cited By ~ 1

Author(s):

Ting Ting Zou ◽

Xiao Hui Wang ◽

Long Tu Li

Keyword(s):

Grain Size ◽

Low Temperature ◽

High Performance ◽

Piezoelectric Properties ◽

Sintering Temperature ◽

Sintering Aid ◽

Potential Approach ◽

Fine Grain ◽

Sintering Method

High-performance fine-grain (1-x)BiScO3-xPbTiO3 ceramics were prepared by two-step sintering method. Influences of sintering temperature, holding time, and composition on the microstructure and properties were discussed. The BSPT ceramics obtained via two-step sintering reaches density higher than 95% at a low temperature of 800°C without any sintering aid, and the grain size of the ceramics is also effectively controlled. Excellent piezoelectric properties between the composition of x=0.63 and x=0.64 reveals a probable MPB in this range, suggesting a potential approach to pursue high performance BSPT ceramics.

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