Recent Progress in Diamond Raman Lasers

2012 ◽  
Vol 1395 ◽  
Author(s):  
Richard P. Mildren
Keyword(s):  
Thermal Conductivity ◽  
Recent Progress ◽  
Raman Laser ◽  
Cvd Diamond ◽  
High Thermal Conductivity ◽  
Transmission Range ◽  
Short History ◽  
Laser Material ◽  
Raman Lasers

ABSTRACTIn its relatively short history as a Raman laser material, CVD diamond has already demonstrated to be a forerunner in performance. Yet the more outstanding properties of the material such as its high thermal conductivity and wide transmission range remain largely unexploited. This paper summarizes the recent studies aimed to extend diamond laser capability beyond that readily achievable using other materials, focusing on in particular diamond Raman lasers in the ultraviolet, infrared and at high average powers.

scholarly journals Recent Progress in the Study of Thermal Properties and Tribological Behaviors of Hexagonal Boron Nitride-Reinforced Composites

2020 ◽  
Vol 4 (3) ◽  
pp. 116
Author(s):  
Maryam Khalaj ◽  
Sanaz Zarabi Golkhatmi ◽  
Sayed Ali Ahmad Alem ◽  
Kahila Baghchesaraee ◽  
Mahdi Hasanzadeh Azar ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Recent Progress ◽  
Phonon Scattering ◽  
Hexagonal Boron Nitride ◽  
High Thermal Conductivity ◽  
Promising Candidate ◽  
Reinforced Composite ◽  
Low Thermal Expansion ◽  
Wide Range

Ever-increasing significance of composite materials with high thermal conductivity, low thermal expansion coefficient and high optical bandgap over the last decade, have proved their indispensable roles in a wide range of applications. Hexagonal boron nitride (h-BN), a layered material having a high thermal conductivity along the planes and the band gap of 5.9 eV, has always been a promising candidate to provide superior heat transfer with minimal phonon scattering through the system. Hence, extensive researches have been devoted to improving the thermal conductivity of different matrices by using h-BN fillers. Apart from that, lubrication property of h-BN has also been extensively researched, demonstrating the effectivity of this layered structure in reduction of friction coefficient, increasing wear resistance and cost-effectivity of the process. Herein, an in-depth discussion of thermal and tribological properties of the reinforced composite by h-BN will be provided, focusing on the recent progress and future trends.

Measurement of Thermal Diffusivity of Cvd diamond films using modified ac calorimetry

1995 ◽  
Vol 416 ◽  
Author(s):  
Akikazu Maesono ◽  
Ronald. P. Tye
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Cvd Diamond ◽  
High Thermal Conductivity ◽  
Ac Calorimetry ◽  
Free Standing ◽  
International Round ◽  
Flow Directions ◽  
Very High

ABSTRACTMany applications of thin films, especially for electronics devices, require that these materials, which are often anisotropic, have a very high thermal conductivity as well as uniform areal properties to ensure that reproducible performance be attained. These factors necessitate that measurements of thermal transport properties are required both to provide absolute application values for different heat flow directions as well as to evaluate uniformity and homogeneity of a wafer. For diamond, the combination of a very high thermal conductivity with limited size and form of available specimen presents unique challenges to the experimentalist. As a result, a modification of the ac calorimeter method has been developed to evaluate the thermal diffusivity of thin films.Details of the technique will be provided together with examples of its use to evaluate thermal diffusivity and thermal conductivity of different CVD diamond film composites having thicknesses from 10µm to 600µm and free-standing films. In addition, results using this method will be compared. with those obtained by other techniques involved in a recent international round-robin measurements program designed to evaluate a potential standard method(s).

Preparation of 1D C/C Composites with High Thermal Conductivity

2013 ◽  
Vol 28 (12) ◽  
pp. 1338-1344 ◽  
Author(s):  
Jian-Feng LIN ◽  
Guan-Ming YUAN ◽  
Xuan-Ke LI ◽  
Zhi-Jun DONG ◽  
Jiang ZHANG ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Thermal Conductivity

High thermal conductivity carbon fiber reinforced polymer based on a carbon fiber from pitch and dispersed-filled ENPB matrix

2018 ◽  
pp. 130-137
Author(s):  
E. A. Nikolaeva ◽  
A. N. Timofeev ◽  
K. V. Mikhaylovskiy
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
High Thermal Conductivity ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Carbon Powder ◽  
Fiber Reinforced ◽  
Thermophysical Characteristics ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

This article describes the results of the development of a high thermal conductivity carbon fiber reinforced polymer based on carbon fiber from pitch and an ENPB matrix modified with a carbon powder of high thermal conductivity. Data of the technological scheme of production and the results of determining the physicomechanical and thermophysical characteristics of carbon fiber reinforced polymer are presented. 

Strain tuned high thermal conductivity in boron phosphide at nanometer length scales – a first-principles study

2020 ◽  
Vol 22 (36) ◽  
pp. 20914-20921 ◽  
Author(s):  
Rajmohan Muthaiah ◽  
Jivtesh Garg
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
High Thermal Conductivity ◽  
Biaxial Strain ◽  
Length Scales ◽  
First Principles Study ◽  
Boron Phosphide

We report novel pathways to significantly enhance the thermal conductivity at nanometer length scales in boron phosphide through biaxial strain.

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