ISSN:0232-1300    

DOI:10.1002/crat.2170230526

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

ISSN:0232-1300    

DOI:10.1002/crat.2170230527

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

ISSN:0232-1300    

DOI:10.1002/crat.2170230528

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

摘要:

AbstractThe shape and size of the gross morphological defect which occurs (in the form of a depression) as a result of the diffusion inhomogeneity in the matter supply on the growing crystal face with supercritical dimensions are investigated. The transition shapes of similar skeletal crystal faces are determined by considering the configuration of the steps which are moving (and accumulating) from the edge toward the centre of the crystal face. The basic parameter which is evaluated, is the width of the macroscopically flat periphery which grows around the depression and its alteration when the crystal is enlarged. The theoretical analysis is carried out by presuming that no transportation of crystallizing material occurs parallel to the crystal face. The calculations are based on the different thicknesses of the Nernst diffusion layer, a magnitude which can be easily determined experimentally by some interferometric technique, over the various regions of the growing face.

ISSN:0232-1300    

DOI:10.1002/crat.2170230502

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

摘要:

AbstractIn the present work the phaseP—Tdiagram of ice is constructed in the temperature range 90–250 K and is ascertained at temperatures 250–300 K and pressures up to 2500 MPa. A new modification of ice — ice XII — was found. Compressibility and Grüneisen coefficients for a number of ice modifications were

ISSN:0232-1300    

DOI:10.1002/crat.2170230503

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

摘要:

AbstractThe structural, optical and electrical behaviour of MnS under high pressure was investigated. For X‐ray investigations and optical observations a gasketed diamond anvil cell was used. Measurements of the electrical conductivity were performed in a Bridgman opposed‐anvil apparatus. A structural phase transition at 7.2 GPa from the cubic α‐phase (NaCl‐type) to the B16‐type structure (GeS‐type) was detected by X‐ray investigations and confirmed by optical observations. Measurements of the electrical conductivity showed a linear decreasing electrical gap energy in dependen

ISSN:0232-1300    

DOI:10.1002/crat.2170230504

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

摘要:

AbstractAll types of fluctuation mechanisms resulting in a normal kinetics of the one‐component and binary melt's crystallization within a small supercooling region for micro‐ and macro‐systems are systematized. Three principal mechanisms of spontaneous fluctuations acting in the monolayers of two‐phase transitional zone in the vicinity of melting temperature for one‐component metallic crystals and of the liquidus temperature for binary ones are described. The formulas of kinetic coefficients figuring in the normal law of crystallization conformably to one‐component and binary metallic micro‐ and macrosystems for all types of fluctuation mechanisms are presented. Some peculiarities of each fluctuation mechanism are presented. Some peculiarities of each fluctuation mechanism acting within a small supercooling region of the melt‐crystal micro‐ and macrosystems are pointed out. A comparison of theoretical and experimental data concerning the one‐component and binary melt's crystallization kinetics at some small superco

ISSN:0232-1300    

DOI:10.1002/crat.2170230505

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

ISSN:0232-1300    

DOI:10.1002/crat.2170230506

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

摘要:

AbstractThe growth kinetics of LiNbO3films from a limited volume of melt solution is observed. We developed crystallization models describing the character of mass transfer in the liquid phase for isothermal and non‐isothermal epitaxy. Analytical expressions have been derived connecting the film thickness with the system growth parameters. The experimental values being in good agreement with the calculated one

ISSN:0232-1300    

DOI:10.1002/crat.2170230507

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY

ISSN:0232-1300    

DOI:10.1002/crat.2170230508

出版商:WILEY‐VCH Verlag    

年代:1988

数据来源: WILEY