Abstract: A Group VB element doped with a ?-gallium oxide crystalline material, and a preparation method and application thereof. The series doped with the ?—Ga2O3 crystalline material is monoclinic, the space group is C2/m, the resistivity is in the range of 2.0×10?4 to 1×104?·cm, and/or the carrier concentration is in the range of 5×1012 to 7×1020/cm3. The preparation method comprises steps of: mixing M2O5 and Ga2O3 with a purity of 4N or more at molar ratio of (0.000000001-0.01):(0.999999999-0.99); an then performing crystal growth. The present invention can prepare a high-conductivity ?-Ga2O3 crystalline material with n-type conductivity characteristics by conventional processes, providing a basis for applications thereof to electrically powered electronic devices, optoelectronic devices, photocatalysts or conductive substrates.

Abstract: The disclosure relates to the technical field of cleaning devices, and discloses a cleaning device. The cleaning device includes a machine body, a front bumper, a cleaning assembly, a collecting assembly and a water tank. The machine body is provided with a recess, and the cleaning assembly includes a roller for cleaning the ground. The roller is mounted between the machine body and the front bumper. The collecting assembly is provided with a wastewater outlet and mounted between the machine body and the roller and abuts against the roller. The water tank is provided with a wastewater inlet and is removably mounted in the recess. The wastewater flows into the water tank through the wastewater outlet and the wastewater inlet.

Abstract: A cleaning robot includes a main body, a drive assembly and a cleaning assembly. The main body includes a bottom part. The cleaning assembly includes a mounting part, a wiping part and a release part. The mounting part is positioned on the bottom part. The mounting part includes a first rail, a second rail, and a first positioning part. The wiping part is positioned on the mounting part and includes a second positioning part, the wiping part is movable from first ends of the first rail and the second rail to second ends thereof until the second positioning part abuts against the first positioning part whereby the wiping part is fixed on the mounting part. The release part is positioned on the mounting part and configured to separate the second positioning part from the first positioning part whereby the wiping part is detached from the mounting part.

Abstract: A cleaning robot including a body, a driving assembly for driving the cleaning robot to move, and a first cleaning assembly for cleaning a floor is disclosed. The first cleaning assembly includes a rotating shaft, mounting members mounted at both ends of the rotating shaft, a brush body provided outside the rotating shaft, and the rotating shaft is rotatable along with rotation of the mounting member, driving the brush body to clean the floor. The brush body includes a soft bag of an internal hollow structure and a brush portion extending outward from a surface of the soft bag, such that during cleaning, elastic space of the first cleaning assembly is increased, and a frictional force between the first cleaning assembly and the floor is reduced, thereby effectively protecting the floor and increasing the service life of the first cleaning assembly.

Abstract: A Group VB element doped with a ?-gallium oxide crystalline material, and a preparation method and application thereof. The series doped with the ?—Ga2O3 crystalline material is monoclinic, the space group is C2/m, the resistivity is in the range of 2.0×10?4 to 1×104?·cm, and/or the carrier concentration is in the range of 5×1012 to 7×1020/cm3. The preparation method comprises steps of: mixing M2O5 and Ga2O3 with a purity of 4N or more at molar ratio of (0.000000001-0.01):(0.999999999-0.99); an then performing crystal growth. The present invention can prepare a high-conductivity ?-Ga2O3 crystalline material with n-type conductivity characteristics by conventional processes, providing a basis for applications thereof to electrically powered electronic devices, optoelectronic devices, photocatalysts or conductive substrates.

Abstract: A cleaning robot including a body, a driving assembly for driving the cleaning robot to move, and a first cleaning assembly for cleaning a floor is disclosed. The first cleaning assembly includes a rotating shaft, mounting members mounted at both ends of the rotating shaft, a brush body provided outside the rotating shaft, and the rotating shaft is rotatable along with rotation of the mounting member, driving the brush body to clean the floor. The brush body includes a soft bag of an internal hollow structure and a brush portion extending outward from a surface of the soft bag, such that during cleaning, elastic space of the first cleaning assembly is increased, and a frictional force between the first cleaning assembly and the floor is reduced, thereby effectively protecting the floor and increasing the service life of the first cleaning assembly.