Spring returns to the earth, waiting for flowers to bloom

Release time:

2024-01-29 09:38


Spring returns to the earth, waiting for flowers to bloom


Jingzhe, known as "Qizhe" in ancient times, is the third solar term in the 24 solar terms, marking the beginning of the mid-spring season. When the sun reaches 345 degrees of the yellow longitude. The sixth emperor of the Han Dynasty, Emperor Hanjing, taboo "Qi", in order to avoid taboo, changed "Qi" to the word "Jing" with similar meaning.




"Moon order seventy-two Hou set solution" "February festival...... everything is beyond the shock, the shock for the thunder, so the stinging, is the stinging insect startled and run away." At this time, spring urges everything, whether it is plants, animals, or natural landscapes, to have new vitality, showing a thriving scene.


The ancients called the animal into the winter hidden in the soil, do not drink do not eat, for "sting". When the first thunder of spring sounded, hibernating animals were awakened, people called this day "stung". Therefore, when stinging, the stinging insect wakes up, the weather gets warmer, and spring thunder gradually occurs.



In mid-spring and Tun, when it rains, the beginning of thunder will be in the eastern corner.

The stings were all hidden, and the grass and trees were all over the place.

Pianpian new Yan, both into my house.


-- Tao Yuanming


Insects, animals, stinging insects, season, everything, mid-spring, for, wake up, moon

Yuanlei Classroom | As a key material, how many applications does precipitated barium sulfate have?


The appearance of precipitated barium sulfate is a white amorphous powder, with a relative density of 4.50 (15 ℃) and a melting point of 1580 ℃. Due to its high refractive index (1.63-1.65), it exhibits a relatively white color and a certain degree of covering power. It is almost insoluble in water, ethanol, and acid, soluble in hot sulfuric acid. It is easy to form mixed crystals with potassium permanganate, calcium carbonate, or metal nitrates, and can be reduced to barium sulfide with carbon at high temperatures.

Yuan Lei's Little Knowledge | Application of Wet Mica Powder in Other Fields


Wet mica powder is a high-quality mineral filler made from high-quality mica raw materials, which are washed, impurity removed, soaked, crushed, low-temperature dried, and screened. Its unique production process maximizes the preservation of mica's sheet-like structure, large diameter to thickness ratio, high refractive index, high purity, high whiteness, high gloss, low sand and iron content, and other industrial characteristics that cannot be compared to dry process technology. The unique performance of wet mica powder has greatly improved its application in multiple industries such as plastics, paint, rubber, etc., and has a significant effect on improving product performance and reducing costs.

Yuan Lei's Little Knowledge | Application of Wet Mica Powder in Resin and Plastics


Wet mica powder is a high-quality powder with good whiteness, large diameter to thickness ratio, smooth surface, and uniform particle size obtained by special processes of crushing, drying, and grading mica fragments after washing, impurity removal, and purification. It is widely used in rubber, plastics, coatings, paints, cosmetics, and other industries.