Optical Homogeneity of CdWO4 Single Crystal Grown by Vertical Bridgman Process

2009 ◽  
Vol 24 (5) ◽  
pp. 1036-1040
Author(s):  
Hong-Bing CHEN ◽  
Hua-Ping XIAO ◽  
Fang XU ◽  
Qi-Shu FANG ◽  
Cheng-Yong JIANG ◽  
...  
CrystEngComm ◽  
2022 ◽  
Author(s):  
Ziyun Chen ◽  
Tingyu Deng ◽  
Rui Chen ◽  
Di Lin ◽  
Wenning Di ◽  
...  

Using the polycrystalline material with a nominal composition of Nd0.01Pb0.985[(Mg1/3Nb2/3)0.70Ti0.30]O3, a Nd-doped PMN-PT single crystal has been grown successfully by vertical Bridgman process. The perovskite structure and the crystalline phase...


Author(s):  
Chang-Bao HUANG ◽  
You-Bao NI ◽  
Hai-Xin WU ◽  
Zhen-You WANG ◽  
Xu-Dong CHENG ◽  
...  

2006 ◽  
Vol 510-511 ◽  
pp. 842-845 ◽  
Author(s):  
Noriko Bamba ◽  
Kentaro Kato ◽  
Toshinori Taishi ◽  
Takayuki Hayashi ◽  
Keigo Hoshikawa ◽  
...  

Langasite (La3Ga5SiO14: denoted by LGS) single crystal is one of the lead free piezoelectric materials with high piezoelectricity that is maintained up to its melting point (1470°C). Although LGS single crystals have usually been grown by Czochralski (CZ) method in oxygen contained atmosphere to prevent evaporation of Ga, they were grown by the vertical Bridgman (VB) method in Ar atmosphere without oxygen, and their properties were evaluated in this work. Transparent and colorless LGS single crystals were successfully obtained without Ga evaporation by the VB method in Ar atmosphere, and their resistivity at room temperature was much higher than that grown by conventional CZ method. Piezoelectric constant d11 of the crystal grown by the VB method was 6 x 10-12 C/N, which was close to that of the crystal grown by CZ method. The colorless transparent LGS single crystal turned to orange and its resistivity decreased by annealing in air. Since an orange-colored transparent LGS single crystal has been grown by conventional CZ method, this indicates that color change and the resistivity decrease of LGS crystal is caused by extra interstitial oxygen atoms in the crystal.


2021 ◽  
Vol 1032 ◽  
pp. 178-185
Author(s):  
Wan Qiu Ding

This report outlines a succinct analysis of the contemporary casting methods in single-crystal turbine blades. Furthermore, this paper also provides an examination of the solidification procedure in mixed turbine blades. The couple cooling and heating operation system was advanced to obtain identical thermal positions for single crystal (SC) solidification in the blade group, thereby significantly diminishing the associated flaws in the contemporary Bridgman process. The chemistry science of Nickel based alloys planed for single crystal (SC) gas turbine blades has been notably improved upon, especially when considering the initial production of alloys. The second and third production within the total operation has been enhanced by the introduction of rhenium (Re). Surged density, grain flaws, and microstructural stableness have presented themselves as significant issues within this process. Additionally, it is imperative to minimize the concentrations of the different alloying components.


Author(s):  
Vasylyna Kopach ◽  
Oleh Kopach ◽  
Larysa Shcherbak ◽  
Petro Fochuk ◽  
Aleksey E. Bolotnikov ◽  
...  

1993 ◽  
Vol 128 (1-4) ◽  
pp. 576-581 ◽  
Author(s):  
Louis G. Casagrande ◽  
Don Di Marzio ◽  
M.B. Lee ◽  
David J. Larson ◽  
Michael Dudley ◽  
...  

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