Kinetics, morphology and thermodynamics of the solid-liquid transition of non-metals. Progress report, March 1, 1979-February 28, 1980

PDF Version Also Available for Download.

Description

Some previous work on Internal Centrifugal Zone Growth was documented. New calculations have been made to show that for large rf skin depths, the temperature of the sample depends in a systematic way on only three dimensionless parameters; these characterize the rf power level, the surface heat transfer coefficient, and the ambient temperature. Critical values are given for the ambient temperature below which curves of sample temperature versus RF power level are S-shaped. Based on this improvement in understanding, our previous numerical results, valid for arbitrary skin depths, are being prepared for publication. Work continues toward the measurement of the ... continued below

Physical Description

Pages: 11

Creation Information

Sekerka, R.F. August 1, 1979.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

Some previous work on Internal Centrifugal Zone Growth was documented. New calculations have been made to show that for large rf skin depths, the temperature of the sample depends in a systematic way on only three dimensionless parameters; these characterize the rf power level, the surface heat transfer coefficient, and the ambient temperature. Critical values are given for the ambient temperature below which curves of sample temperature versus RF power level are S-shaped. Based on this improvement in understanding, our previous numerical results, valid for arbitrary skin depths, are being prepared for publication. Work continues toward the measurement of the solid-liquid surface tensions of non-metallic materials via the grain-boundary groove technique. Degassed samples of GeO/sub 2/ have been obtained, but the necessary temperature caused damage to the quartz tube in our present apparatus, necessitating a new design. While the new apparatus is under construction, sodium sulfate will be used as a prototype material to enable work on the optical system. Use of an astronomical telescope in conjunction with the optical viewpoint leads to poor image quality so we are considering the substitution of a microscope with a large working distance. Previous difficulties with numerical calculation of the temperature profiles in the system have been alleviated by using finer grid sizes for the finite difference scheme. Further effort has been expended to form the basis of new work on the application of Onsager's theory of reciprocity to transport phenomena in solids.

Physical Description

Pages: 11

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • Other Information: Thesis

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: COO-2407-8
  • Grant Number: EY-76-S-02-2407
  • DOI: 10.2172/6017705 | External Link
  • Office of Scientific & Technical Information Report Number: 6017705
  • Archival Resource Key: ark:/67531/metadc1099961

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • August 1, 1979

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

Description Last Updated

  • April 4, 2018, 1:08 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 1
Total Uses: 2

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Sekerka, R.F. Kinetics, morphology and thermodynamics of the solid-liquid transition of non-metals. Progress report, March 1, 1979-February 28, 1980, report, August 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1099961/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.