Topics of Special Interest

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Topics of Special Interest

Transforming Telecommunications

Talking Ceramics
[Science, Vol. 298, 1182ff (2002)]

The discovery of ceramics based on Ba₂Ti₉O₂₀ in the 1970s was followed by two decades of astonishing developments culminating in the intense global market for microwave communications devices that encompass the world today. Read Terrell A. Vanderah's article, Talking Ceramics, for an incisive look at the past, present, and future of this technology.

UHMWPE Wear Particles Effects on Bioactivity

Ultra-High Molecular Weigth Polyethylene Wear Particles Effects on Bioactivity
[NIST SP 1002]

Ultra-high molecular weight polyethylene (UHMWPE) wear particles have been recognized as one of the major causes of aseptic loosening in total joint replacements. The goal of this study is to develop a technique for producing UHMWPE particles with specific sizes and shapes so as to be able to study the effects of different UHMWPE particles on bioactivity.
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Elastic Moduli Data

Elastic Moduli Data
for Polycrystalline Oxide Ceramics
[NISTIR 6853]

This extensive collection of elastic moduli data for polycrystalline oxide ceramics, based on NIST IR 6853, includes data for Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio. The data have been collected from the technical literature, either as reported in textual or tabular formats or as digitized from graphical formats. Special emphasis is placed on the dependence of the moduli on porosity and temperature.

Data Evaluation Tool

NIST Interactive Data Evaluation Assessment Tool provides a means of classifying property data according to how the data were acquired, processed, and reported. The present protocol is based on the seven categories of acceptable data that are discussed in the NIST Recommended Practice Guide SP 960-11. These categories are used in both the NIST Structural Ceramics Database (SCD) and the NIST Database on High Temperature Superconductors (HTS). The protocol provides an interactive,step-by-step procedure in the manner of a decision tree. Based on the user's responses to a series of questions, the protocol determines the appropriate data evaluation level for a given set of data.

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Date created: 08 February 2001
Last updated: 13 June 2005

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