NanoPlanNanoPlan

HEAT RESISTANT NANODIAMONDSHEAT RESISTANT NANODIAMONDS

BY BY DETONATION SYNTHESISDETONATION SYNTHESIS

Center of Technology NanoPlanCenter of Technology NanoPlan:: Irina Irina LarionovaLarionova, ,

Dr. Dr. Yury LadyginYury Ladygin Nikolay Bychin, Nikolay Bychin, Dr. Dr. Alexander Frolov Alexander Frolov

Russia

PProductionroduction of Nanodiamonds of Nanodiamonds NanoPlanNanoPlan

TNT + RDXTNT + RDX

P>16-30 GPaP>16-30 GPaТ=3000-4000 Т=3000-4000 КК

33

Polydispersity Surface polyfunctionality

NanoPlanNanoPlan Properties of diamond production Properties of diamond production (TNT+RDX) with negative oxygen (TNT+RDX) with negative oxygen

balancebalance

Завод изготовитель Завод изготовитель Размер Размер ОКР, ОКР, нм нм

AAуд. уд. м2/гм2/г

(БЭТ) (БЭТ)

ТТmaxmax

ccкоростькорость

реакцииреакции

на воздухе на воздухе

Удельное Удельное теплосодержаниетеплосодержание

H,H, кДж/г кДж/г

1 ФГУП ФНПЦ «Алтай»1 ФГУП ФНПЦ «Алтай» (г. Бийск, Россия) (г. Бийск, Россия)

4-6 4-6 380 380 563,8 563,8 25,59 25,59

2 ЗАО АЛИТ 2 ЗАО АЛИТ

(г.(г. Житомир, Украина) Житомир, Украина)

6-106-10 160160 594,2 594,2 26,61 26,61

3 ВНИИЭФ 3 ВНИИЭФ

(г. Саров, Россия) (г. Саров, Россия)

4-60 4-60 3636 600,9 600,9 41,27 41,27

Марка АСМ (ЗАО "ПАИ"Марка АСМ (ЗАО "ПАИ"

( г. Полтава, Украина) ( г. Полтава, Украина)

100100 1212 609,9 609,9 42,17 42,17

1 «Dry» method – cooling in gaseous medium

2 «Wet» method – cooling in liquid medium

3 «Ice shell» - cooling of synthesis products with ice

NanoPlanNanoPlan IR-spectra of detonation diamonds of IR-spectra of detonation diamonds of

various typesvarious types

Nano diamonds ofNano diamonds of VNIITFVNIITF

Nano diamonds ofNano diamonds of

FSUE FR & PC ALTAIFSUE FR & PC ALTAI

Nano diamonds ofNano diamonds of

ZAO ALITZAO ALIT

А.P. Koshcheyev Thermal Desorption Mass-spectrometry…. Ros. Chemical Journal, 2008, vol. I.II, No5

NanoPlanNanoPlan Oxidation regularity of nano size Oxidation regularity of nano size

diamondsdiamonds in airin air

20 20 nmnm 557557..9 9 00 С С

45 45 nmnm 592.4 592.4 00 С С

65 65 nmnm 597597..33 0 0 С С

100 100 nmnm 599.4 0 0 С С

Влияние размера агрегатов НА на скорость окисления на воздухе

0

0,4

0,8

1,2

1,6

0 25 50 75 100 125 150

Rn, nm

W,m

g/m

in

Aggregate size influence on the ND oxidation rate in air

ND aggregates number and weight distribution

Thermal stability of the fractioned ND obtained by ”dry” synthesis

NanoPlanNanoPlan Surface structure influence on the thermal Surface structure influence on the thermal

stability of nano diamondsstability of nano diamonds

Зависимость теплового эффекта реакции окисления от плотности

порошков наноалмазов

0

20

40

60

2 2,5 3 3,5 4

р, г/см3

H,

J/g

Change of ND oxidation thermal effect

with the growth of powders density

ConclusionsConclusions

The reactivity of nano size diamonds reduces in the following The reactivity of nano size diamonds reduces in the following sequence: ND of “dry” synthesis, ND of wet synthesis, ND from ice sequence: ND of “dry” synthesis, ND of wet synthesis, ND from ice shell.shell.

The thermal stability of dimensional fractions of ND while heating in air The thermal stability of dimensional fractions of ND while heating in air logically reduces with reducing their aggregates size. The rate of logically reduces with reducing their aggregates size. The rate of oxidation in air of ND fraction 20nm in size is 4.5 times higher than the oxidation in air of ND fraction 20nm in size is 4.5 times higher than the same of fractions 100 nm in size, their thermal stability changing same of fractions 100 nm in size, their thermal stability changing respectively.respectively.

The thermal stability of ND powders depends on their surface purity. The thermal stability of ND powders depends on their surface purity. Nondiamod carbon phases and sorbet admixtures available reduce the Nondiamod carbon phases and sorbet admixtures available reduce the thermal stability and thermal effect of the material oxidation. thermal stability and thermal effect of the material oxidation.

The thermal stability of nano diamond in nitrogen is high and The thermal stability of nano diamond in nitrogen is high and determined only by the portion of volatiles in the ND composition. After determined only by the portion of volatiles in the ND composition. After heat treatment in nitrogen the thermal stability of ND powders of any heat treatment in nitrogen the thermal stability of ND powders of any fractions increases on the average by 10 degrees.fractions increases on the average by 10 degrees.

The TGA allows us to perform express-evaluation of diamond powders The TGA allows us to perform express-evaluation of diamond powders before introducing them into composition.before introducing them into composition.

The combination of the TGA and mass-spectrometry of thermal The combination of the TGA and mass-spectrometry of thermal desorption products gives us possibility of finding the manufacturer of desorption products gives us possibility of finding the manufacturer of this diamond.this diamond.

AcknowledgmentsAcknowledgments

This work has been performed within the This work has been performed within the scope of investigations under ISTC project scope of investigations under ISTC project

NoNo 1708 1708

Thank you very much for your attention!Thank you very much for your attention!