Before returning to the college entrance examination, I became popular in the science circle

Chapter 169 Resonance
In the field of aerospace, liquid fuel is more commonly used as fuel, while solid fuel is generally used in ejections.

This is mainly related to the characteristics of the two fuels. Liquid fuel is cheap, has a high specific impulse, can finely control the output power, and the engine structure is relatively complex.

Solid fuel is easy to store and has high strength, allowing rockets or missiles to be stored for a long time and concealed for motor transportation before launch. The engine structure is simple.

Specific impulse represents the propulsion efficiency of a rocket, measured in seconds, the duration for each kilogram of fuel to produce one kilogram of thrust.

Between the two, the advantages of one are the disadvantages of the other.

Known as a high specific impulse liquid fuel, the current highest specific impulse data is contributed by liquid oxygen, which is only 457. The commonly used dinitrogen tetroxide + dimethylhydrazine in the domestic Changzheng series has a specific impulse of about 348.

Although the specific impulse and thrust of solid fuel are somewhat unsatisfactory, the thrust is greater, the launch is convenient, and the cost is low. Today, when the market for small and micro-satellites is becoming more and more vast, it is common for China to launch regular launches. These advantages are used in the launch of small spacecrafts. It's very tempting.

Wu Tong determined from the beginning that a solid-state engine was more suitable. However, using a solid-state engine was the most cost-effective and had stronger thrust. However, in order to achieve the results she expected, some of the shortcomings of solid-state fuel needed to be optimized, or in other words, To design and develop a new high-energy solid fuel that is different from ordinary solid fuels in the world.

CO, H2, C2H2, CH4, C2H4, CH3CH2OH, N2H4
····A series of chemical symbols passed through Wu Tong's pen and condensed on the draft paper in her hand.

目前固态火箭发动机使用的燃料，大多是高级硼硅烷，氧化剂用的是四氧化二氮（N2O4)、液态氧(O2)或过氧化氢(H2O2)。

Liquid oxygen can be used as fuel, alcohol and methane can be used as fuel, but what about nitrogen... It accounts for about four-fifths of the air. Is it of any use value?

N, N2···N16···N18····Full nitrogen molecule, a popular high-energy material section emerged from Wu Tong’s mind, full nitrogen ion salt?

Theoretically speaking, the energy of total nitrogen substances is very high, and most of the time it can reach the level of 10 to 100 million joules/gram. This energy level is equivalent to 10 times or even a hundred times that of traditional TNT explosives.

Absolute Direction told her that this unexpected inspiration was a pleasant surprise.

N18, N24... These two complement each other and are the direction to move forward. We can obtain a passivated high-energy material that can be used as explosives. The power should be ten times that of ordinary TNT. The base N18 also has its own wonderful effects. .

I accidentally made something dangerous?The fleeting thoughts were quickly ignored by Wu Tong, who was in an immersed state. This substance did not have only one use.

The other is Wu Tong's original intention of creating it, which can be used to make solid rocket and missile fuel.

Nitrogen is not reactive. Under directional storage conditions, the performance of total nitrogen compounds is relatively stable, and even a small amount can produce huge power. This means that this new material has a high specific impulse and is light in volume when used as fuel. The preparation process After maturity, the price will not be expensive, and the price-performance ratio is very high...

In terms of advantages, she needs the advantages of both solid and liquid fuels, and avoids the shortcomings of conventional solid fuels. It is perfect to be used to help rockets reach the sky.

How to prepare the application?

filter?precipitation?Vapor deposition?
Wu Tong suddenly thought of his insights from the last co-bonding effect deduction.

Can multi-oxygen reduction be achieved through reduction?It seems to have struck a certain core, and it seems to have the same effect but the same approach.Sparks spread out like a prairie fire in Wu Tong's mind. Wu Tong's soul was blessed for a moment, and his thinking completely expanded.

Silica silicon oxide, silicon monoxide (SiO), silicon dioxide (SiO2)·······

After listing the chemical formulas one by one and determining the absolute direction, the best choice is Sio6, silicon hexaoxide.

After a special co-bonding effect, it is combined into a special hexagonal molecule, which is more appropriately called polygonal silicon oxide.

The data was turned into a derivation model under Wu Tong's hands, and the data were filled in one by one. Wu Tong determined that silicon hexaoxide best meets the current needs for preparing all-nitrogen compounds.

How to prepare and use this special silica to achieve the desired separation effect?The question was raised, and the currently known materials swept through Wu Tong's mind like a storm.

Finally, among the currently available material preparation methods, Wu Tong determined the preparation direction, wrote a series of molecular formulas on the draft paper, and drew the atomic formula to determine the material.

Hybrid-connected carbon atoms are closely packed into a single-layer two-dimensional honeycomb lattice junction, a typical hexagonal structure, and has a honeycomb architecture aesthetic.

Graphene-(CH)n——COOH-COOH——HOOC-HO···
The revolutionary new material of the future, graphene, is another hot frontier topic in the physical and chemical circles.Using a vapor deposition process, special hexagonal silicon oxide is combined with a graphene film to form a special filter membrane.

She also needs to build a special equipment. The equipment must have nitrogen gas pipelines, filtration devices, and vacuum pumps. The entire preparation process requires a pressure difference, a sealed workshop with a purity of more than [-], and no visible light...

Each preparation condition was deduced and determined by Wu Tong, and the preparation process standards gradually took shape.

After setting up the preparation infrastructure, Wu Tong began to deduce the preparation process and the material preparation process. According to the types she envisioned to be used, from major categories to subdivisions, one by one, Wu Tong gradually determined the sieving method. Used to the extreme, repeated screening and deduction calculations, mathematical models assist in deriving the directional data needed to achieve corresponding results under special conditions...
By combining various capabilities, Wu Tong screened out the step parameters required for the preparation process.

Pressurization, pressure parameters, vacuum pressure difference, specific current and voltage, and the special effect of electrifying hexagonal silicon oxide. Under this special effect, the synthesis of gas to solid state...
Step by step, an epoch-making new high-energy molecular material chain is presented in Wu Tong's writing.

The final process was settled, and Wu Tong gradually broke away from the state of in-depth research without any distractions.

At this moment, when Wu Tong saw what she had made at hand, he couldn't help but realize in hindsight that what she had made this time was a bit extraordinary!
This time she had a burst of inspiration and seemed to have created an incredible chain of reaction materials.

At first, she just wanted to research a better solid fuel as the power source for her newly designed scram dual-pulse pressure engine.

Just studying, studying, she suddenly had an idea, which resonated with the special molecular formula she had deduced from the co-bonding effect before, and came up with a new special all-nitrogen compound N18.

This special all-nitrogen compound is an allotrope of nitrogen.

(End of this chapter)