阅读说明：本技术 一种利用骨灰制备人工钻石的方法及其产品 (Method for preparing artificial diamond by using bone ash and product thereof ) 是由 钟柳 钟佳俊 于 2019-10-30 设计创作，主要内容包括：本发明公开一种利用骨灰制备人工钻石的方法及其产品,其制备步骤如下：(1)将骨灰过500目筛,对筛网上的骨灰进行研磨,研磨至粒径为<50μm；(2)酸性处理：将酸溶液倒入骨灰中至pH为3.3-3.4,搅拌,并浸泡3-6h；(3)加热酸溶液,并向酸溶液中鼓入气体；(4)将酸溶液中溢出的气体收集,并导入真空气相沉积室,沉积室底部设有硅基,同时向沉积室导入氢气,微波等离子体放电,沉积室压力为1kPa-10kPa,温度为800-1100℃,时间为15-20min；(5)获取沉积于硅基的含碳材料,粉碎；将粉碎后的含碳材料注入高压反应室,在高温高压下,制得人工钻石。获得的产品坚硬、光泽度好、美观,保存时间长。(The invention discloses a method for preparing artificial diamond by using bone ash and a product thereof, wherein the preparation steps are as follows: (1) sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is less than 50 mu m; (2) acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring, and soaking for 3-6 h; (3) heating the acid solution and bubbling a gas into the acid solution; (4) collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1-10 kPa, the temperature is 800-1100 ℃, and the time is 15-20 min; (5) obtaining a carbon-containing material deposited on the silicon substrate, and crushing; and injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure. The obtained product has the advantages of high hardness, good glossiness, good appearance, and long shelf life.)

1. A method for preparing artificial diamond by using bone ash comprises the following steps:

(1) sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is less than 50 mu m;

(2) acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring, and soaking for 3-6 h;

(3) heating the acid solution and bubbling a gas into the acid solution;

(4) collecting carbon-containing gas overflowing from the acid solution, introducing the carbon-containing gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1-10 kPa, the temperature is 800-1100 ℃, and the time is 15-20 min;

(5) obtaining a carbon-containing material deposited on the silicon substrate, and crushing; and injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure.

2. The method according to claim 1, wherein the screen of step (1) is made of graphite and is disposed in the hearth of the bone ash pyrolysis furnace.

3. The method according to claim 1, wherein the gas in step (2) is a gas collected during the cremation.

4. The method according to claim 3, wherein the gas is carbon dioxide gas obtained by separation and chemical displacement.

5. The method as claimed in claim 4, wherein the step (5) comprises heating and pressurizing the high pressure reaction chamber step by step to 30-35MPa, heating to 800 ℃ at a constant rate, maintaining for 5-10min, continuously pressurizing to 110MPa at 100-.

6. An artificial diamond obtained by the method of any one of claims 1 to 5.

Technical Field

The invention relates to a process for extracting raw carbon of biological diamond and a product thereof, in particular to a process for extracting carbon by taking bone ash as a raw material to prepare biological diamond.

Background

A new funeral and interment law is issued in 2016, people in the country in China must be cremated after death in a legal form, traditional burial is not allowed any more, and in recent years, along with the change of cognition, the mode of cremating remains and storing bone ash is gradually accepted by the masses. Therefore, people in the country face the problem of how to store and store the bone ash of ancestors and relatives for a long time. At present, the country actively advocates a new green funeral and interment mode, such as: the method of sea burial, tree burial, etc. solves the problem of setting up the bone ash, but is not accepted by people at present, and can not express the thoughts and recalls of the parent. The bone ash is processed into precious stones, and the precious stones are made into various collectibles, souvenirs and artware, such as rings, bracelets, pendant, bracelet, chains, statues and ornaments in various shapes, and the precious stones are made from one part of the human body, so the precious stones have unique commemorative value and unique significance.

At present, diamond has the excellent performances of maximum hardness, maximum thermal conductivity, minimum compressibility, widest light-transmitting wave band, fastest sound velocity, large carrier mobility and the like, and is widely applied to the fields of industry, science and technology, national defense, medical treatment and the like. Meanwhile, the diamond is a symbol of wealth and glowing due to the hard, rare and uniform bright visual effect, and various ornaments made of the diamond are deeply loved by people. However, because of the scarcity of natural diamonds, the demand of people for diamonds cannot be met, and artificial diamonds are produced. Artificial diamonds are typically made of graphite, and therefore, carbon-containing substances can be made into diamonds. All organisms in the world are rich in carbon, and the carbon content in the human and all animal bodies is about 18%. All other 'living' substances also contain a certain amount of carbon, for example, the main component of plant chlorophyll is carbon, the main component of tree trunks is carbon, energy sources for maintaining human life, namely sugar, fat and grease, are composed of three elements of carbon, hydrogen and oxygen, and the main components of protein and vitamin are also carbon elements. Therefore, without carbon, life does not exist, so carbon is the source of life. The bone ash produced by cremation of human and animal remains contains rich carbon in addition to elements such as calcium, phosphorus and the like, and carbon-containing gas such as carbon dioxide or carbon monoxide and the like is generated by combustion in the cremation process. If the carbonaceous matter generated in the process of cremation of the remains of the human or animal is converted into the artificial diamond, various souvenirs such as diamond rings, necklaces, artworks and the like are made, which is the best souvenir for deceased relatives, deceased pets and the like.

Disclosure of Invention

The invention aims to provide a method for preparing artificial diamond by using bone ash and a product thereof, which are scientific, reasonable, simple and feasible, and the obtained product is hard, good in glossiness, attractive in appearance and long in storage time.

The invention relates to a method for preparing artificial diamond by using bone ash, which comprises the following steps:

(1) sieving the bone ash with a 500-mesh sieve, grinding the bone ash on the sieve until the particle size is less than 50 mu m;

(2) acid treatment: pouring acid solution into the bone ash until the pH value is 3.3-3.4, stirring, and soaking for 3-6 h;

(3) heating the acid solution and bubbling a gas into the acid solution;

(4) collecting gas overflowing from the acid solution, introducing the gas into a vacuum vapor deposition chamber, arranging a silicon substrate at the bottom of the deposition chamber, introducing hydrogen into the deposition chamber, discharging by microwave plasma, wherein the pressure of the deposition chamber is 1-10 kPa, the temperature is 800-1100 ℃, and the time is 15-20 min;

(5) obtaining a carbon-containing material deposited on the silicon substrate, and crushing; and injecting the crushed carbon-containing material into a high-pressure reaction chamber, and preparing the artificial diamond under high temperature and high pressure.

The screen in the step (1) is arranged in a hearth of the bone ash pyrolysis furnace and is made of graphite.

And (3) the gas in the step (2) is collected in the cremation process.

And (3) the gas in the step (2) is carbon dioxide gas obtained through separation and chemical replacement.

And (5) heating and pressurizing step by step in the high-pressure reaction chamber, firstly pressurizing to 30-35MPa, then heating to 800 ℃ with constant speed, keeping for 5-10min, continuously pressurizing to 110MPa with 100 ℃ with constant speed, heating to 1700 ℃ with constant speed, preserving heat for 12-15h, then cooling to 800 ℃ with 600 ℃ with constant temperature, starting pressure relief, and simultaneously continuing cooling to normal temperature and normal pressure to obtain the artificial diamond.

An artificial diamond obtained by the above method.

Compared with the prior art, the invention has the following beneficial effects:

after the bone ash is changed into the artificial diamond and is stored in a home, a cemetery does not need to be purchased any more, the county management fee of endless cemetery does not need to be paid, and the bone ash can be stored in the home as a biographical treasure, so that the land is saved for the country, the activity of people on the deceased can be kept, the country is benefited, and in addition, the discomfort brought by directly storing the cinerary casket in the home is solved.

The invention is scientific and reasonable, is suitable for popularization, has simple process and good product quality. The invention can obtain the bone ash part of the elapsed relatives or pets which people hope to store more by collecting the bone ash on the screen and crushing the bone ash. Blowing the acid-containing solution by using carbon dioxide gas collected in the cremation process, and allowing carbon-containing gas in the acid-containing solution and the carbon dioxide gas to enter a vapor deposition chamber together for deposition to obtain a carbon material containing diamond and graphite; the artificial diamond is prepared by heating and pressurizing step by step after crushing, two different processes are combined, and the energy consumption of the process conditions is greatly reduced.

When the carbon-containing material is used for preparing the diamond, the invention adopts heating and pressurizing step by step, and strictly controls the pressurizing and heating time and the temperature range, so that the pressure control of the process is more accurate, the seed crystal is ensured to grow up quickly and continuously, and the prepared artificial diamond has high purity, good color and luster and strong toughness, can be stored for a long time, and is suitable for people to remain for commemorating the lost deceased people or pets.

Detailed Description

The present invention is further described below with reference to examples.