5results about How to "Reduce cracking rate" patented technology

The application discloses a kind of self-adaptive cutting processes for preventing silicon rod hidden crack, including the following steps: silicon rod pretreatment, cutting equipment debugging and initialization, multidimensional real-time monitoring, parameter adaptive adjustment, cutting process closed-loop control, cutting completion and post-processing.The application detects the whole dimension through the silicon rod pretreatment stage, multidimensional real-time monitoring the key parameters such as internal stress and cutting line state of silicon rod, dynamically adjusts the cutting parameters through adaptive algorithm, realizes the accurate control of cutting stress, avoids the hidden crack caused by excessive stress and parameter mismatch from the root;According to the differences of silicon rod characteristics, the state changes in the cutting process, automatically adjust the cutting parameters, with strong adaptive ability, wide adaptability, improve the cutting efficiency and silicon rod cutting yield;Through the filing of cutting data and the construction of database, realize the continuous optimization of process, with high degree of automation, reduce labor cost.

The invention provides a ZSM-23 molecular sieve, a preparation method thereof and a catalyst. The preparation method comprises the following steps: mixing a silicon source, an aluminum source, an alkali source, an organic structure-directing agent, a mesoporous template agent, a crystal growth inhibitor and water to form a raw material solution, crystallizing, washing, drying and roasting to obtain the ZSM-23 molecular sieve, the crystal growth inhibitor comprises one or a combination of more than two of trimethoxy [3-(phenylamino) propyl] silane, lauryl sodium sulfate, tetradecyl phosphoric acid and glutamic acid. According to the method, the ZSM-23 molecular sieve with small crystal grains and a hierarchical pore structure can be synthesized in one step, and the catalytic performance of the molecular sieve is improved.

This invention provides a method for producing lubricating oil base oil from heavy feedstock and the resulting lubricating oil base oil. The method includes: cutting the heavy feedstock to obtain a light component, a middle fraction, and a bottom wax; wherein the boiling point ranges of the light component, the middle fraction, and the bottom wax are 170-300℃, 300-500℃, and >500℃, respectively; subjecting the bottom wax to a first isomerization reaction under the catalysis of a first isomerization catalyst to obtain a first isomerization product; subjecting the first isomerization product and the middle fraction to a second isomerization reaction under the catalysis of a second isomerization catalyst to obtain a second isomerization product; subjecting the second isomerization product to hydrorefining; and then fractionating the obtained refined product to obtain the lubricating oil base oil. The lubricating oil base oil produced by this method has high yield, low pour point, low cloud point, and high viscosity index, making it a high-quality lubricating oil base oil.

The invention belongs to the field of solar cells, and particularly relates to a back contact solar cell module and a manufacturing method thereof, and the method comprises the steps: enabling an interconnection strip to be attached to the back surface of a cell, enabling the cells to be connected into a string, laying photovoltaic glass, a first packaging glue layer, the cell string and a glass fiber surface mat from bottom to top, and then carrying out the lamination, and obtaining a cell module prefabricated part, the front surface of the cell faces the glass, the gram weight of the first packaging adhesive layer is 80-150g / m < 2 >, non-pre-crosslinked packaging adhesive is adopted, and the lamination condition is controlled to enable the interconnection strip to be in ohmic connection with the electrode grid line on the back surface of the cell and enable the first packaging adhesive to be bonded with the glass fiber surfacing mat through the gap of the cell string; a second packaging glue layer and a back plate are sequentially laid on the battery assembly prefabricated part, then lamination is carried out, the battery assembly is obtained, the lamination condition is controlled, so that second packaging glue of the second packaging glue layer is bonded with the back surface of the battery string through the glass fiber surface felt, and virtual connection or disconnection between the interconnection strip and the battery grid line is avoided.

The invention provides a method for producing lubricating oil base oil from a heavy raw material and the obtained lubricating oil base oil, and the method comprises the following steps: cutting the heavy raw material to obtain a light component, a middle fraction and tower bottom wax; wherein the boiling point ranges of the light component, the middle fraction and the tower bottom wax are 170-300 DEG C, 300-500 DEG C and gt respectively; 500 DEG C; performing a first isomerization reaction on the middle fraction under the catalytic action of a first isomerization catalyst to obtain a first isomerization reaction product; carrying out a second isomerization reaction on the tower bottom wax under the catalytic action of a second isomerization catalyst to obtain a second isomerization reaction product; and mixing the first isomerization reaction product and the second isomerization reaction product, performing hydrofining, and performing fractionation cutting on the obtained refined product to obtain the lubricant base oil. The lubricating oil base oil product produced by the method provided by the invention is high in yield, low in condensation point and high in viscosity index, and is high-grade lubricating oil base oil.