Smirnov Andrey Vladimirovich RussiaSaratovSaratov State University, 410012, Russia, Saratov, Astrakhanskaya street, 83ассистентsmirnov-sgu@yandex.ru Author's articles Production of Tungsten Spherical Microparticles in Ultrasonic Field at Presence an Activator Morphology of Gas Sensitive Tin Dioxide Thin Films Operating at Room Temperature