To gain an in-depth understanding of the application performance of resistor paste in HVDC converter valve resistors

PbRuO3 was selected as the conductive phase

glass powder as the inorganic binder

and ethyl cellulose/α-terpineol as the organic vehicle. Resistor films were fabricated through screen printing followed by high-temperature sintering. Specifically

the effects of the specific surface area of PbRuO3

the blending ratio of low- and high-softening-point glass powders

and the amount of dispersant added on the electrical properties of the resistor paste and the microstructure of the films were systematically investigated. The results showed that when the specific surface area of PbRuO3 reached 18 m2/g

the variation in resistance was minimized to only 1.13%. With a mass ratio of 3:7 for glass powders G1 and G2

the temperature coefficient of resistance (TCR) could be controlled within ±50×10-6 ℃−1

while the film exhibited optimal densification and a short-time overload capacity of up to 100 V/mm. Moreover

when the dispersant content was 1%

the printed patterns were well defined

and the resistance concentration degree was less than 3. These findings demonstrate that rational adjustment and optimization of the conductive phase characteristics and glass powder ratios can significantly enhance the stability and reliability of resistor pastes for HVDC converter valves. This work provides both theoretical guidance and experimental supports for the domestic design and development of resistor pastes.