2results about How to "Enough buoyancy" patented technology

The present application relates to a kind of perovskite precursor solution stability protection method, belong to perovskite photovoltaic technical field, solve the problem that perovskite precursor solution is easily affected by light, oxygen and water vapor and occurs degradation deterioration in the process of opening bottle use.The method of the present application is: perovskite precursor solution is stored in liquid storage container, perovskite precursor solution surface is covered with a layer of liquid protective layer formed by liquid protective agent;The absorbance A of liquid protective layer in 300~550 nm wave band is greater than or equal to 3.The present application forms threefold protection of light shielding, oxygen isolation and water vapor barrier through liquid protective layer, can continuously provide interface protection in the process of opening bottle and static storage, effectively improve the stability of perovskite precursor solution.

This utility model relates to the field of wine aging technology and discloses a level gauge for measuring the liquid level in oak barrels. It includes a float, a connecting rod, an indicator plate, a flange, and a transparent tube arranged coaxially. The float has a hollow structure with a cylindrical center. The radial dimension of the float's center is smaller than the opening of the oak barrel. One end of the float is spherical, and the other end is fixedly connected to one end of the connecting rod, which in turn is fixedly connected to the indicator plate. The radial dimension of the flange is larger than the opening of the oak barrel, and one end of the flange is fixedly connected to one end of the transparent tube. The transparent tube has graduations, and the indicator plate is fitted inside the transparent tube. A through hole is formed in the center of the flange, and the connecting rod is fitted inside the through hole. This level gauge can accurately measure the liquid level in oak barrels during aging, providing accurate data for calculating the aging volume. It has a simple structure and is convenient to assemble and use.