Growth, structural, optical, thermal and mechanical properties of ammonium pentaborate single crystal

Balakrishnan, T.; Bhagavannarayana, G.; Ramamurthi, K.

doi:10.1016/j.saa.2008.01.026

Cited by 44 publications

(13 citation statements)

References 12 publications

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“… 은 다음과 같은 식(6)으로 주어진다 (29) . (30) . AEAPTMS로 처리한 목재가 산소소모율이 가장 높게 나타났으며 다른 물질보다 완전연 소가 잘 이루어질 것으로 판단된다.…”

Section: 이에 대하여 unclassified

New Smoke Risk Assessment on Wood Treated with Silicone Compound

Chung¹,

Jin²

2019

Fire Sci. Eng

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A burning test was conducted on the smoke and combustion gases generated from cypress wood treated with sodium silicate, 3-aminopropyltrimethoxysilane sol, 3-(2-aminoethylamino)propylmethyldimethoxysilane sol, and 3-(2-aminoethylamino) propyltrimethoxysilane sol. The silicone compound sol was applied to each of the cypress wood specimens three times with a brush. The smoke and combustion generation gas were analyzed using a cone calorimeter (ISO 5660-1) and the smoke was also evaluated by applying new smoke risk assessment method. The smoke performance index (SPI) of the cypress treated with silicone compound increased 1.66 to 8.42 times and the smoke growth index (SGI) was 11.8 to 88.2%, respectively. The smoke intensity (SI) is expected to be 1.0~50.5% lower than that of the base specimens, resulting in lower smoke and fire hazards. The third maximum carbon monoxide (CO peak) concentration of the specimens treated with silicone compounds was 22.5~33.3% lower than that of the base specimens. On the other hand, it produced potentially fatal toxicity that was 1.48~1.72 times higher than the US Occupational Safety and Health Administration (OSHA) acceptance standard (PEL). Cypress wood itself produced a high carbon monoxide concentration, but the silicon compound played a role in reducing this level.

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Section: 이에 대하여 unclassified

New Smoke Risk Assessment on Wood Treated with Silicone Compound

Chung¹,

Jin²

2019

Fire Sci. Eng

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“…Figure (24) . BA15는 열분해 시에 물을 잃고 300 ℃에서 유리상태의 산화붕소를 남기고, APB15는 440.5 ℃에서 물과 암모니아 를 잃고 유리상태의 산화붕소로 남는다 (25) . 목재의 열분해로 생성 된 자유 라디칼숯을 생성하는 폴리머화 및 열분해 생성 물의 방향족화를 수행한다.…”

Section: 함수율 측정unclassified

Fire Risk of Wood Treated With Boron Compounds by Combustion Test

Jin¹,

Chung²

2018

Fire Sci Eng

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Experiments on the combustion characteristics of untreated wood specimens and also treated ones with boric acid and ammonium pentaborate were carried out using a cone calorimeter according to ISO 5660-1 standard. As a result, comparing to untreated specimen, the fire performance index (FPI) of the specimens treated with boron compounds increased by 1.2 to 2.1 times and the fire growth index (FGI) increased by 1.6 to 8.4%. Also, total smoke release rate (TSR) was 9.0 to 28.3% lower than that of the untreated specimen. It is understood that the test specimens treated with the boron compound produces a carbonized layer with a flame retarding effect. The highest CO concentration, 0.01112%, for the untreated specimen was observed at 418 s, but the specimens treated with boron compound decreased 13.2 to 37.5% compared to untreated specimen. Therefore, wood treated with boron compounds is expected to have lower fire hazards and risks.

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“…또한 5붕산암모늄(Ammonium pentaborate, NH4B5O8＝1/2 [(NH4)2Oㆍ5B2O3])은 공기 중에서 안정되지만, 가열하면 440.5 ℃에서 물과 암모니아를 잃고 유리 상태의 산화붕소 가 남는다. 수용액은 알칼리성 반응을 나타내고, 가열하면 암모니아를 발생한다 (14) .…”

Section: B3o3 -→ H2o + Hbo2unclassified

Combustion Characteristics of Cypress Specimens Painted with Solutions of Boron Compounds

Chung¹,

Jin²

2018

Fire Sci Eng

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The combustion characteristics of cypress wood coated with boric acid (BA) and ammonium pentaborate (APB) were examined using a cone calorimeter according to the ISO 5660-1 standard. As a result, the combined specimens of boric acid and ammonium pentaborate (BA/APB) led to an improved fire performance index due to their synergistic effect. In addition, the total heat release values of the specimen coated with the boron compounds were 6.1~14.1% lower than that of the base specimen. The total smoke release rate (TSR) of the specimens coated with the boron compound decreased throughout the combustion process, except for BA/APB. The maximum concentration of carbon monoxide was reduced by 15.8~25.5%. In general, wood treated with flame retardants has a lower fire hazard.

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Growth, structural, optical, thermal and mechanical properties of ammonium pentaborate single crystal

Cited by 44 publications

References 12 publications

New Smoke Risk Assessment on Wood Treated with Silicone Compound

New Smoke Risk Assessment on Wood Treated with Silicone Compound

Fire Risk of Wood Treated With Boron Compounds by Combustion Test

Combustion Characteristics of Cypress Specimens Painted with Solutions of Boron Compounds

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