Fast-response thermistors made of synthetic single-crystal diamonds

Low Temperature Thermal Conductivity of Heavily Boron-Doped Synthetic Diamond: Influence of Boron-Related Structure Defects

“…The best fit of experimental data was achieved at dislocation densities of ∼ 3.7⋅10 6 and ∼ 3.6⋅10 7 cm -2 for BDDs with 2⋅10 19 and 5⋅10 19 cm -3 boron content respectively. These values are more than an order of magnitude higher than the ones measured by etch pits counting (see Fig.…”

“…Boron-doped IIb-type diamonds (BDD) are p-type semiconductors extensively used in design of high-power, high-frequency, high temperature electronic devices [6][7][8]. Thermal conductivity of single-crystal BDD is an important parameter for electronic devices but it is much less investigated comparing to undoped IIa-type diamonds.…”

Boron Doped Diamond for Real-Time Wireless Cutting Temperature Monitoring of Diamond Coated Carbide Tools

“…Nevertheless, the feasibility of wireless temperature monitoring through the use of boron doped diamond-based thermistors and a “Li-Fi” wireless communication system was clearly demonstrated. The works of Pel and collaborators demonstrate that the sensitivity and response time of the diamond thermistor can be improved [ 11 , 12 ]. An upcoming work will address the improvement of such parameters through the direct inclusion of a boron doped diamond thermistor layer on the coated tool, envisioning the fabrication of advanced diamond tools in line with the concept of Industry 4.0.…”

“…Boron doped diamond (BDD) thin films grown by chemical vapour deposition (CVD) exhibit sensitivity to temperature characterized by a negative temperature coefficient (NTC), i.e., when the temperature increases the electrical resistance of the thermistor decreases. Several studies have demonstrated the performance of boron doped CVD diamond based thermistors, which besides high thermal sensitivity also exhibit high chemical inertness, thermal conductivity, and mechanical robustness, making them ideal candidates for applications in harsh environments [ 8 , 9 , 10 , 11 , 12 ]. In this work, BDD thermistors were used for real-time temperature monitoring of end milling operations, with wireless signal communication based on LED-to-LED communication, or “Li-Fi” (light fidelity).…”