助溶剂法晶体生长方法英文介绍

Experimental Section
1.Small crystals of Li2ZrTeO6 were obtained through the spontaneous crystallization method with an excess amount of Li2CO3 and TeO2 serving as flux. 2.A reaction mixture of Li2CO3, ZrO2, and TeO2 was adequately ground and subsequently placed in a platinum crucible. 3.The crucible containing the mixture was gradually heated to 760 °C and held for 2 days to ensure a completely homogeneous solution . 4.A platinum wire was slowly dipped into the solution to serve as a nucleation center, and then the temperature of the solution was decreased to 692 °C at a rate of 2 °C h−1. 5.Some colorless and transparent small crystals were obtained on the platinum wire by spontaneous nucleation 6.A high-quality Li2ZrTeO6 seed was introduced slowly into the solution at a temperature 4 °C above the saturation temperature to dissolve the surface defects of the seed. 7.Subsequently, a slow cooling rate of about1C h−1 was applied to begin the growth process until the centimeter-sized crystal was obtained. 8. When the process was
-
NPM
BaNbO(IO3 )5 LiTi(IO3）6
Cc
600×α-SiO2 500×α-SiO2
2.55
PM
P63
3.0
PM
Preparation Method
Flux Leabharlann ethodFlux method, also known as high temperature solution method, it is the original components at high temperature melting in low melting point flux solution, forming uniform saturated solution and then through slow cooling, forming a susaturated solution to produce crystal.
High temperature solution furnace
Preparation Method
Advantages: 1. Strong applicability; 2. Low temperature required for crystal growth; 3. Easier to obtain high-quality crystals; 4. Few crystal defects; 5. Simple operation. Disadvantages: 1. Long crystal growth cycle;
β-BaTeMo2O9
lone pair cations Pb2+, Bi3+，I5+，Te4+， Se4+…
Introduction
NCS only d0 transition metal ions
Compound
Space group Cmm2
intensity of frequency doubling 220×α-SiO2 180×α-SiO2 300×α-SiO2
medical treatment directivity laser monochro matism
military
communication
coherence
Introduction
Second order ginger-taylor effect cation
d0 transition metals： Mo6+，W6+， Nb5+，V5+ ，Zr4+…
Forbidden phase band width /eV matching
KNbW2O9
-
NPM
KTaW2O9
Cmm2 Cmc21
2.75
PM PM
Pb3SeO5
only lone pair electrons both gingertaylor ions
Bi2TeO5
Abm2
300×α-SiO2
Experimental Section
The flow chart：
heat to 760 °C held for 2 day
Measure crystallizatio
01
L i 2 C O 3 ZrO2 TeO2 adequately ground
shomogeneous solution
03
Team Project Plant
Catalogue
1 2 3 4
Introduction Preparation Method
Experimental Section Conclusions
Introduction
high energy density
industrial processing
Spontaneous
crystallization
n saturation point
05
place a highquality Li2ZrTeO6
Crystal growth
02
04
seed
Slow cooling a rate of 1 ° C h−1
06
decreas to 692 °C at a rate of 2 °C h−1
2. Easy introduction of impurities;
3. Most fluxes are toxic, and volatile substances may corrode or contaminate the furnace body.
Preparation Method
The principle of flux selection: 1.enough solubility for the crystal 2.In the crystal range, the crystals required are the only stable phases 3.low viscosity 4.Lower melting point and higher boiling point 5.Less volatile, corrosive and toxic 6.easy to separate crystals