Device and method for synthesizing nanoparticles by simulating zero-microgravity flame with assistance of magnetic field

The invention relates to a device and a method for synthesizing nano-particles by simulating zero-microgravity flame under the assistance of a magnetic field. The device comprises a gradient magnetic field device (1), a combustor (2) and a product collecting device (3), and the gradient magnetic field device is composed of two magnetic field devices arranged face to face, the combustor is located between the two magnetic field devices, and an outlet of the combustor is vertically upward and located below the magnetic field center of the gradient magnetic field device. The gradient magnetic field device acts on the flame and the volume force of magnetic species around the flame to counteract the gravity buoyancy effect, flame synthesis is carried out under the simulated zero/microgravity flame, and the nano-particles are prepared. Compared with an existing flame synthesis device, the device can simulate zero/microgravity flames on the ground through the gradient magnetic field, nano-particles are synthesized u