Project No: FE0001127
Performer: Missouri University of Science & Technology (Miner Circle)

Robert Romanosky
Advanced Research
Technology Manager
National Energy Technology Laboratory
3610 Collins Ferry Road
P.O. Box 880 PO3D
Morgantown, WV 26507-0880

Susan Maley
Project Manager
National Energy Technology Laboratory
3610 Collins Ferry Road
P.O. Box 880 P03D
Morgantown, WV 26507-0880

Hai Xiao
Principal Investigator
Missouri University of Science and
219 Emerson Hall
Rolla, MO 65409

Award Date:  10/01/2009
Project Date:  09/30/2014

DOE Share: $1,013,796.00
Performer Share: $264,211.00
Total Award Value: $1,278,007.00

Performer website: Missouri University of Science & Technology (Miner Circle) -

Crosscutting Research - Plant Optimization Technologies

Micro-Structured Sapphire Fiber Sensors for Simultaneous Measurements of High Temperature and Dynamic Gas Pressure in Harsh Environments

Project Description

The project is to develop single-crystal sapphire fiber based sensors for in situ measurement of temperature (up to 1600°C) and dynamic gas pressure in harsh environments. It will also conduct fundamental and applied research that leads to successful single-crystal sapphire fiber hybrid extrinsic/intrinsic Fabry-Perot interferometer (HEIFPI) sensors. A multidisciplinary research team from Missouri University of Science and Technology (MST) and University of Cincinnati (UC) will collaboratively focus on solving the fundamental and engineering challenges. MST and UC will model the HEIFPI sensor in response to temperature and pressure. A fully optimized measurement system integrated with high quality sapphire sensors is the objective.

Program Background and Project Benefits

This project will develop advanced temperature measuring sensor devices for direct and simultaneous measurement of temperature and dynamic gas pressure in high temperature (up to 1600°C), high pressure, and chemically-harsh environments. The outcome of this technology will be advanced control of key operational parameters resulting in enhanced efficiency, reduced emissions, and improved reliability, availability, and maintainability of existing and next generation power and fuel systems.


Researchers met their initial milestone of constructing models of the HEIFPI sensor in response to anticipated temperature and pressure conditions. Researchers then established structural parameters of the HEIFPI sensor to guide device fabrication. The team has completed a unique sensor fabrication device using a femtosecond laser. Using this device, the team has been able to micro machine sapphire for the purposes of temperature and pressure measurement. In addition, the team has made progress on formulations of thin ceramic films to coat the sapphire. The research team also participated in sensor design and packaging for in situ monitoring of high-temperature synthesis gas in a small-scale coal gasifier at the University of Cincinnati. The experience of testing in harsh environment benefits the research on sensors that are viable for commercial applications.