Molecularly Modified Alkoxide Precursors for Synthesis of Dielectric Ceramics.

1990 ◽  
Vol 180 ◽  
Author(s):  
Pradeep P. Phule ◽  
Farida Khairulla
Keyword(s):  
Chemical Synthesis ◽  
High Purity ◽  
Low Temperatures ◽  
Alkaline Ph ◽  
Ultrafine Powders ◽  
Chemical Polymerization ◽  
Electronic Ceramics ◽  
Precipitation Technique ◽  
Dielectric Ceramics ◽  
Alkoxide Precursors

ABSTRACT:Chemical synthesis of titanate and zirconate based multicomponent electronic ceramics using molecularly modified alkoxide precursors is discussed. Controlled chemical polymerization of the modified alkoxides was conducted to prepare multicomponent gels which on calcination at moderate temperatures (700 – 1000°C) formed high purity, ultrafine powders (e.g. BaTiO3, ZrTiO4, LiTaO3). In the sol-precipitation technique modified precursors were used to prepare ultrafine (< 100 nm) and crystalline powders of such ceramics as BaTiO3 and BaZrO3 at low temperatures (< 100°C), under highly alkaline (pH > 13) conditions.

scholarly journals Canted antiferromagnetism in high-purity NaFeF3 prepared by a novel wet-chemical synthesis method

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Fabian L. M. Bernal ◽  
Bruno Gonano ◽  
Fredrik Lundvall ◽  
David S. Wragg ◽  
Helmer Fjellvåg ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
High Purity ◽  
Synthesis Method ◽  
Wet Chemical Synthesis ◽  
Wet Chemical

Polycrystalline and high purity SnO2 films by plasma-enhanced atomic layer deposition using H2O plasma at very low temperatures of 60–90 °C

Vacuum ◽  
2021 ◽  
pp. 110739
Author(s):  
Jong Hyeon Won ◽  
Heenang Choi ◽  
Seong Ho Han ◽  
Bo Keun Park ◽  
Taek-Mo Chung ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
High Purity ◽  
Low Temperatures ◽  
Atomic Layer ◽  
Layer Deposition

Positron annihilation in fatigued copper

1982 ◽  
Vol 60 (2) ◽  
pp. 201-204 ◽  
Author(s):  
S. Kupca ◽  
D. P. Kerr ◽  
B. G. Hogg ◽  
Z. S. Basinski
Keyword(s):  
Single Crystals ◽  
Point Defects ◽  
High Purity ◽  
Low Temperatures ◽  
Annealing Process ◽  
Simple Diffusion ◽  
Diffusion Limited ◽  
Annealing Study ◽  
Positron Lifetimes ◽  
Trapping Process

Positron lifetimes have been measured in an isochronal annealing study of dynamically fatigued, high purity Cu single crystals. Decomposition of the lifetime spectra into two components results in a description of the annealing process in terms of the lifetime and fraction of trapped positrons. Positron lifetimes were also determined at a series of low temperatures (10–300 K) at different stages of annealing. The lifetime of positrons trapped at point defects is found to vary with temperature indicating that a description of the trapping process according to a simple diffusion limited model is not applicable.

scholarly journals Identification of a Novel Alkaliphilic Esterase Active at Low Temperatures by Screening a Metagenomic Library from Antarctic Desert Soil

2009 ◽  
Vol 75 (13) ◽  
pp. 4657-4659 ◽  
Author(s):  
Caroline Heath ◽  
Xiao Ping Hu ◽  
S. Craig Cary ◽  
Donald Cowan
Keyword(s):  
Escherichia Coli ◽  
Amino Acid ◽  
Low Temperatures ◽  
Metagenomic Library ◽  
Desert Soil ◽  
Functional Screening ◽  
Potential Candidate ◽  
Alkaline Ph ◽  
Burkholderia Xenovorans ◽  
Novel Esterase

ABSTRACT A novel esterase was identified through functional screening of a metagenomic library in Escherichia coli obtained from Antarctic desert soil. The 297-amino-acid sequence had only low (<29%) similarity to a putative esterase from Burkholderia xenovorans. The enzyme was active over a temperature range of 7 to 54°C and at alkaline pH levels and is a potential candidate for industrial application.

Frequency Dependence of Resistivity of High-Purity Copper at Low Temperatures

1993 ◽  
Vol 32 (Part 1, No. 7) ◽  
pp. 3199-3203 ◽  
Author(s):  
Hiroshi Nakane ◽  
Tsuneo Watanabe ◽  
Mineo Kobayashi ◽  
Takasu Hashimoto
Keyword(s):  
Frequency Dependence ◽  
High Purity ◽  
Low Temperatures ◽  
Purity Copper

scholarly journals Low-Temperature Chemical Synthesis of High-Purity Diacylglycerols (DAG) from Monoacylglycerols (MAG)

Lipids ◽  
2014 ◽  
Vol 50 (2) ◽  
pp. 219-226 ◽  
Author(s):  
Łukasz Pazdur ◽  
Jeroen Geuens ◽  
Hannes Sels ◽  
Serge M. F. Tavernier
Keyword(s):  
Low Temperature ◽  
Chemical Synthesis ◽  
High Purity

scholarly journals Wet-chemical synthesis of different bismuth telluride nanoparticles using metal organic precursors – single source vs. dual source approach

2015 ◽  
Vol 44 (32) ◽  
pp. 14272-14280 ◽  
Author(s):  
Georg Bendt ◽  
Anna Weber ◽  
Stefan Heimann ◽  
Wilfried Assenmacher ◽  
Oleg Prymak ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
Bismuth Telluride ◽  
Low Temperatures ◽  
Single Source ◽  
Wet Chemical Synthesis ◽  
Phase Pure ◽  
Dual Source ◽  
Metal Organic ◽  
Wet Chemical ◽  
Organic Precursors

Thermolysis of metal organicsingle sourceanddual source precursorsyielded phase-pure BixTeynanoparticles at low temperatures.

scholarly journals Microplasma-chemical synthesis and tunable real-time plasmonic responses of alloyed AuxAg1−x nanoparticles

2014 ◽  
Vol 50 (24) ◽  
pp. 3144-3147 ◽  
Author(s):  
Tingting Yan ◽  
Xiaoxia Zhong ◽  
Amanda Evelyn Rider ◽  
Yi Lu ◽  
Scott A. Furman ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
Real Time ◽  
Atmospheric Pressure ◽  
Low Temperatures ◽  
Reducing Agent

A new conceptual microplasma-based approach is developed to produce AuAg alloyed crystalline nanoparticles at atmospheric pressure and low temperatures, in the absence of a chemical reducing agent. Real-time plasmonic monitoring is demonstrated.

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