佳礼资讯网

 找回密码
 注册

ADVERTISEMENT

查看: 1531|回复: 2

请求各位大大帮忙-- colour flame 的 experiment

[复制链接]
发表于 23-6-2009 12:30 AM | 显示全部楼层 |阅读模式
请求各位大大帮忙解释为什么用不同的colourtant会使火产生不同的颜色呢?谢谢
How To Color Fire
  • Toss dry colorants onto the flames.
  • Soak logs in an alcohol solution of colorants.
  • Soak logs in an aqueous (water) solution of colorants and allow the logs to dry.
  • Prepare pinecones, sawdust, or cork with colorants.
In general, there is no specific proportion of colorant to mix with thewater or alcohol. Add as much powdered colorant as will dissolve in theliquid (roughly a half pound colorant to a gallon of water). Do notattempt to mix colors together - you will probably end up with a normalyellow flame. If you want multicolored fire, try adding severalpinecones, each treated with a single colorant, or scatter a mixture ofdried colored sawdusts across the fire.
How to Prepare Pinecones or Sawdust
It's easy! Remember to do this procedure separately for eachcolor. You can combine dry pinecones or sawdust with differentcolorants later.
  • Pour water into a bucket. Use sufficient water to be able to wetyour pinecones, sawdust, or waste cork. Skip to step 3 if you purchasedyour colorant in liquid form.
  • Stir in colorant until you can't dissolve any more. Forsawdust or waste cork, you may also add some liquid glue, which willallow the pieces to stick together and form larger chunks.
  • Add the pinecones, sawdust, or cork. Mix to form an even coat.
  • Let the material soak in the colorant mixture for several hours or overnight.
  • Spread the pieces out to dry. If desired, pinecones may beplaced in a paper or mesh bag. You can spread sawdust or cork out onpaper, which will also produce colored flames.
How to Prepare Logs
Follow steps 1 and 2 above and either roll a log around in thecontainer (big container, small log) or else pour and spread themixture onto the logs. Wear kitchen or other protective gloves toprotect your hands. Allow the logs to dry. If you make your ownnewspaper logs, you can smear colorant onto the paper before rollingit.
Points to Keep in Mind

  • The element sodium burns with the usual yellow flame. The presence of this element canoverwhelm any other color. If you are making a dry mixture of colorantsor colored pinecones/sawdust, you should avoid including any colorantthat has sodium in it.
  • If you are using alcohol-based colorants: Remember thatalcohol is flammable. If you don't allow it to evaporate before use,you will get a lighter-fluid effect. Use with care!
  • Don't color BBQ fire! The colorants may produce pretty flames, but they can also produce toxic food.
  • Keep the colorants away from children and handle them with thecare and respect due to potentially hazardous chemicals. Read andadhere to any warnings listed on product labels.
Now, here is the list of colorants. Most can be found in a groceryor dry goods store, in the laundry or cleaner section. Look for coppersulfate in swimming pool supplies (already in water, which is fine).Potassium chloride is used as a salt substitute and may be found in thespice section. Epsom salts, borax, and calcium chloride may be foundwith laundry/cleaning supplies. Others, including strontium chloride,can be obtained from stores that specialize in rocketry or fireworksupplies.

Flame Colorants
ColorChemical
CarmineLithium Chloride
RedStrontium Chloride
OrangeCalcium Chloride (a bleaching powder)
YellowSodium Chloride (table salt)
or Sodium Carbonate
Yellowish GreenBorax
GreenCopper Sulfate
BlueCopper Chloride
Violet3 parts Potassium Sulfate
1 part Potassium Nitrate (saltpeter)
PurplePotassium Chloride
WhiteMagnesium Sulfate (Epsom salts)

[ 本帖最后由 ws0822 于 23-6-2009 12:36 AM 编辑 ]
回复

使用道具 举报


ADVERTISEMENT

发表于 23-7-2009 11:58 PM | 显示全部楼层
When a chemical substance was given energy such as heating, the electron inside the chemical substance will promoted from ground state to excited state,  as the electron falls back into ground state, it emits a certain wavelength which gives out colours.

要知道多一点请看quantum mechanics的书。
回复

使用道具 举报

 楼主| 发表于 1-9-2009 03:33 PM | 显示全部楼层
原帖由 mytruthbox 于 23-7-2009 11:58 PM 发表
When a chemical substance was given energy such as heating, the electron inside the chemical substance will promoted from ground state to excited state,  as the electron falls back into ground state,  ...


ok。。好的謝謝你提供的資料。。
回复

使用道具 举报

您需要登录后才可以回帖 登录 | 注册

本版积分规则

 

ADVERTISEMENT



ADVERTISEMENT



ADVERTISEMENT

ADVERTISEMENT


版权所有 © 1996-2023 Cari Internet Sdn Bhd (483575-W)|IPSERVERONE 提供云主机|广告刊登|关于我们|私隐权|免控|投诉|联络|脸书|佳礼资讯网

GMT+8, 29-3-2024 07:01 PM , Processed in 0.060421 second(s), 24 queries , Gzip On.

Powered by Discuz! X3.4

Copyright © 2001-2021, Tencent Cloud.

快速回复 返回顶部 返回列表