2 edition of Borate fluxes, viscosity and crystal growth. 1976. found in the catalog.
Borate fluxes, viscosity and crystal growth. 1976.
Claude Michel Lawrence
Written in English
Thesis submitted to the C.N.A.A] for the degree ofDoctor of Philosophy.
The growth cracking and inclusions in the as-grown crystal boule are discussed. CBF crystallizes in the noncentrosymmetric space group Cm (Z . Single crystals of caesium dilithium tetragadolinium pentaborate, CsLi2Gd4(BO3)5, were obtained by heating lithium and gadolinium in a caesium borate flux. The structure features chains of edge.
B2Oy This is an advantage for flux growth of CLBO compared with that of LBO, which grows only from a flux rich in B This is because crystal growth from a flux rich in B is often difficult due to the high viscosity. Therefore, the flux poor in B was used to grow large crystals. Since the flux viscosity is rather low, the CO 2 from carbonates does not produce foam (as usual for silicate melts), and liquid comes to equilibrium much faster, than silicate/borate glasses. A BaFe 12 O 19 single crystal previously obtained by spontaneous crystallization was used as a seed crystal.
However, since magma viscosity controls magma transport, when modelling many volcanic processes (e.g., dome growth) there is a need to estimate crystal‐content viscosity dependence even in the limit of very high crystal content where no experimental observations are available [see, e.g., Melnik and Sparks, , ]. Research primarily concerns crystal growth, crystallography, crystal chemistry, crystal physics of It became possible to grow borate single crystals with sufficiency large sizes and high homogeneities and to consider some of the grown crystals as multifunctional materials for modern Flux Growth and Characterization, pp. In Handbook of.
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The growth of single crystals in these works was performed by the flux technique using fluxes, based on the borax Na 2 B 4 O 7 system for Cu 2 AlBO 5 and B 2 O 3 or B 2 O 3-Li 2 O for Cu 2 GaBO 5. However, due to the high viscosity of most boron-based flux systems (in the cases of , ), the sizes of single crystals were limited by Cited by: 1.
A series of alkali-borate (Na 2 OB 2 O 3, Na 2 OB 2 O 3, Na 2 O2B 2 O 3 and Li 2 OB 2 O 3), and a series of alkali-molybdate (Na 2 OMoO 3, Na 2 O2MoO 3 and Li 2 OMoO 3) solvents were studied with a view to find out the suitable conditions for growing single crystals from germanate phases by the flux ternary systems viscosity and crystal growth.
1976. book Cited by: 3. In this section, a brief overview of flux growth techniques for bulk borate NLO crystals is presented. Growth of Bulk Borate NLO Crystals Low-Temperature Phase of Barium Metaborate (β-BaB 2 O 4, or BBO) BaB 2 O 4 was first synthesized in through the fusion reaction of NaB 2 O 4 and BaCl by: 2.
Journal of Crystal Growth 24/25 () North-Holland Publishing Co. VISCOSiTY AND DENSITY OF BaO/B/BaF2 FLUXES AND SOLUTIONS D. ELWELL, P. CAPPER and C.
LAWRENCE Department of Physics, Portsmouth Polytechnic, Portsmouth, England Viscosity, density, expansion coefficient and surface tension data are reported for fluxes Cited by: a flux consisting of bao, b2o3 and a barium halide such as baf2, bac12, babr2 or bai2 is used for the solution growth of synthetic garnets and orthoferrites when appropriate amounts of the proper nutrients are dissolved in this flux and allowed to precipitate out as single crystals.
this occurs either by slowly cooling an initially unsaturated solution, or by continuously dissolving nutrient Cited by: 8. Crystal Growth and Charact. 40 () Additive agents In order to find suitable agents to reduce the viscosity of LiB fluxes, alkaline oxides or alkaline halides such as Li20, Na20, LiF, NaC1 and acidic oxides such as P2Os, MOO3, WO3, P2Os were added into the LiB samples and investigated using the orthogonal method.
FLUX SELECTION is dependent on the acidity/basicity of both sample and Spectroflux analytical flux. In decreasing order of basicity, the pure alkali metal borate fluxes can be grouped as follows.
LiBO 2 > Na 2 B 4 O 7 > Li 2 B 4 O 7 Samples can be broadly grouped into three categories: Acidic SiO 2, P 2 O 5 Basic M 2 O, MO or M 2 O 3 (M = Metal. John S. Berkes, William B. White, Structural characteristics of alkali borate flux liquids, Journal of Crystal Growth, /(69), 6, 1, (), ().
Crossref Vol. Abstract: High quality and large size Al-doped CsLiB6O10 (CLBO) single crystals have been successfully grown by top-seeded solution growth (TSSG) technique using Cs2O–Li2O–MoO3 fluxes. The advantages of this newly developed flux system were investigated by viscosity measurements and growth experiments.
Al-doped CLBO presents a very high transmittance. The viscosity and electrical resistance of members of the systems Li 2 O–B 2 O 3, Na 2 O–B 2 O 3, and K 2 O–B 2 O 3 have been measured in the approximate temperature range ° to °C.
The log viscosity isotherms in the range ° to °C. showed a minimum in the low‐alkali region followed by a maximum as the alkali concentration was increased. Request PDF | Other Borate Crystals | La2CaB10O19 (LCB)Ca4YO(BO3)3 (YCOB)GdCa4O(BO3)3 (GdCOB)Bismuth TriborateGdxY1−xCa4O(BO3)3 (GdCOB)Tetra-LBOReferences | Find, read and cite all the research.
This book introduces the principles and techniques of crystal growth by the flux method, an elementary level are also provided to better understand the techniques and to help in assessing the quality of the crystals. The book also contains many photographs of beautiful crystals with important physical properties of current interest, such as.
The book as a whole is distributed by MDPI under the terms and conditions of the Creative Commons license CC BY-NC-ND.
Contents Complex investigation of phase formations in multi-component borate melts and the study of crystal growth conditions for novel high-temperature borates will provide a scientiﬁc base for. A single crystal of gallium borate, GaBO3, 4 × 4 × mm3 in size has been grown by spontaneous crystallization with a molten flux based on a Bi2OB2O3 solvent.
From single crystal X-ray diffraction measurement, GaBO3 was found to crystallize in the trigonal calcite type, space group R-3c, with cell dimensions a = (10) and c = (4) Å, Z = 6.
Layers. A lithium−potassium−borate glass system containing manganese and iron cations has been thoroughly investigated in order to obtain information about the mixed alkali effect and the structural role of both the manganese and iron in such glass hosts.
Mixed alkali borate glasses of the (30 − x)Li2O − xK2O − 10CdO/ZnO − 59B2O3 (x = 0, 10, 15, 20, and 30) doped. In the crystal growth from the B-rich self-flux solution, we grew SBO single crystals at three different growth rates of, and mm/day along the a-axis.
The growth periods for each growth rate w 72, and 96 h, respectively. The growth rate of the crystals was controlled by growth temperature.
In the present manuscript, the efforts to control the crystal morphology are carried out aiming at improving the lubrication of lime-alumina-based mold flux for casting advanced high-strength steel with high aluminum. Jackson α factors for crystals of melt crystallization in multi-component mold fluxes are established and reasonably evaluated by applying.
Magnesium carbonate: flux for high-fire range, increases glaze adhesion and viscosity. Used for matte glazes. Talc: Used as a flux in low-temperature clay bodies, and as a flux in both low- and high-fire glazes.
Dolomite: A calcium-magnesium carbonate flux used in the high-fire range when both elements are desired. Growth and Characterization of Nonlinear Optical Borate Crystals: CBO, SBO and BBO International School of Photonics A dissertation submitted to Cochin University of Science and Technology, Cochin, Kerala towards the partial fulfillment of award of degree of Master of Technology in Optoelectronics and Laser Technology by.
The surface tension of a series of compositions ranging from 0 to % PbO in the system PbO‐B 2 O 3 and of compositions ranging from 0 to 35% SiO 2 in the system PbO‐SiO 2, was measured by a modification of the anchor ring volatility and changes in composition of members of each system on heating were found to be related to the surface tension and its change with.
EPB1 EPA EPA EPB1 EP B1 EP B1 EP B1 EP A EP A EP A EP A EP A EP A EP B1 EP B1 EP B1 Authority EP European Patent Office Prior art keywords aluminium supplying component flux whisker boric acid Prior art date .Third, the introduction of fluoride-containing flux can effectively decrease the viscosity of the borate systems during the growth of single crystals, which is a .The study of the LBGO-LiF phase diagram showed that LiF could be considered as a convenient flux to reduce viscosity of the melt during the growth process.
A new borate crystal.